Boiling point of the solution prepared by dissolving 12.30 g of ordinary sugar (sucrose, c12h22o11, 342.3 g/mol) in 35.00 g of water is 100.5°C.
To calculate the boiling point of the solution, we need to determine the boiling point elevation caused by the addition of sucrose to the water. The boiling point elevation of a solution is proportional to the molality (moles of solute per kilogram of solvent) of the solute.
First, let's calculate the molality of the solution:
12.30 g sucrose / 342.3 g/mol = 0.0359 moles sucrose
35.00 g water / 1000 g/kg = 0.035 kg water
Molality = 0.0359 moles / 0.035 kg = 1.03 mol/kg
Next, we can use the formula for boiling point elevation to calculate the boiling point of the solution:
ΔTb = Kb * molality
where ΔTb is the change in boiling point, Kb is the boiling point elevation constant for water (0.512 K kg/mol), and molality is the molality of the solution.
ΔTb = 0.512 K kg/mol * 1.03 mol/kg = 0.529 K
Finally, we can add the boiling point elevation to the boiling point of pure water (100°C) to obtain the boiling point of the solution:
Boiling point of solution = 100°C + ΔTb = 100°C + 0.529 K = 100.529°C (approximately 100.5°C)
So, the boiling point of the solution is 100.5°C.
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major difference between non polar molecular solids and hydrogen bonded molecular solids
Nonpolar molecular solid does not have a large quantity of charge at extreme end. In the polar molecular solids, Hydrogen bonds occur.
What are nonpolar molecular solids?Nonpolar solids which are also known as Non-polar molecular solids are composed of weak dispersion forces and are soft by nature. Their molecules are held by weak London forces or dispersion forces. Nonpolar solids mostly exist in a gaseous or liquid state At room temperature and pressure.
Hydrogen Bonded Molecular Solids have polar covalent bonds between hydrogen and fluorine or Oxygen Nitrogen atoms. Strong hydrogen bonding binds molecules of solids as H2O in ice form.
so we can conclude that there is no profusion of charge at the opposite end in the Nonpolar molecular solid. Hydrogen bonds occur in polar molecular solids.
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if you were to take 5.70 l of the buffer in part a and add 200.00 ml of 1.50 m hcl, what would the new ph be? (2 points)
The new pH of the solution after adding 200.00 mL of 1.50 M HCl to 5.70 L of the buffer in part A would be approximately 2.43.
pH is calculated by taking the negative logarithm of the hydrogen ion concentration in the solution. The hydrogen ion concentration for the solution after adding the HCl can be calculated using the Henderson-Hasselbalch equation, which states that pH = pKa + log([A-]/[HA]). In this case, the pKa of the buffer is 4.76 and the initial [A-]/[HA] ratio is 0.20.
After adding the HCl, the [A-]/[HA] ratio will decrease to 0.0166, giving a new pH of 2.43.
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what is the temperautre of a system in a thermal equilibrium with another system made up of water and steam at 1 atm of pressure?
The temperature of a system in thermal equilibrium with another system made up of water and steam at 1 atm of pressure would be 100 degrees Celsius (or 373 Kelvin). This is the boiling point of water at 1 atm of pressure and is the temperature at which water and steam coexist in equilibrium.
Thermal equilibrium is a state in which two or more objects at different temperatures are placed in thermal contact, and as a result of this, they eventually reach a common temperature. In other words, thermal equilibrium is the state in which no net heat flow occurs between the objects. The common temperature they reach depends on the specific heat capacities and masses of the objects and the initial temperatures of each.
For example, if a hot piece of metal and a cold piece of metal are placed in thermal contact, heat will flow from the hot piece of metal to the cold piece of metal until both pieces reach the same temperature. Once this occurs, the two pieces are said to be in thermal equilibrium.
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a solution consists of 18.8 g of ammonia (nh3), 129.2 g water, and has a volume of 156 ml. calculate the weight percent of nh3, the molality of nh3, the mole fraction of nh3, and the molarity of nh3 in the solution.
A solution of 18.8 g of ammonia (nh3), 129.2 g water, which has a volume of 156 ml ha s weight percent 12.76%, mole fraction 0.131, and molarity 7.05 mol/L.
First, we'll calculate the number of moles of ammonia (NH3) in the solution:
moles of NH3 = mass of NH3 / molecular mass of NH3
moles of NH3 = 18.8 g / 17.03 g/mol = 1.10 mol
Next, we'll find the weight percent of NH3 in the solution:
weight percent of NH3 = (mass of NH3 / total mass of solution) x 100
total mass of solution = mass of NH3 + mass of water
total mass of solution = 18.8 g + 129.2 g = 148.0 g
weight percent of NH3 = (18.8 g / 148.0 g) x 100 = 12.76%
Next, we'll find the molality of NH3 in the solution:
molality = moles of solute / mass of solvent (in kilograms)
mass of solvent (water) = 129.2 g
mass of solvent in kilograms = 129.2 g / 1000 g/kg = 0.1292 kg
molality = 1.10 mol / 0.1292 kg = 8.51 mol/kg
Next, we'll find the mole fraction of NH3 in the solution:
mole fraction of NH3 = moles of NH3 / (moles of NH3 + moles of water)
moles of water = 129.2 g / 18.015 g/mol = 7.16 mol
mole fraction of NH3 = 1.10 mol / (1.10 mol + 7.16 mol) = 0.131
Finally, we'll find the molarity of NH3 in the solution:
molarity = moles of solute / volume of solution (in liters)
volume of solution = 156 ml
volume of solution in liters = 156 ml / 1000 ml/L = 0.156 L
molarity = 1.10 mol / 0.156 L = 7.05 mol/L
So, the weight percent of NH3 in the solution is 12.76%, the molality of NH3 is 8.51 mol/kg, the mole fraction of NH3 is 0.131, and the molarity of NH3 is 7.05 mol/L.
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Two oxides of sulphur A and B analysed and the result obtained shows that in oxide A 3.50g of sulphur combined with 6.05g of oxygen and in oxide B 2.80g of sulphur combined with 2.80g of oxygen show that this results illustrate the law of multiple proportion. Write their formulae
The results illustrate the law of multiple proportions since the oxygen atoms in A and B are in simple multiple ratios.
The formula of the oxides is SO₃ and SO₂ respectively.
What are the masses of sulfur and oxygen in A and B?Mass of sulfur in A = 3.50 g
Moles of sulfur in A = 3.50/32
Moles of sulfur in A = 0.11 moles
Mass of oxygen in A = 6.05 g
Moles of oxygen in A = 6.05/16
Moles of oxygen in A = 0.38
The mole ratio of sulfur to oxygen = 0.11 : 0.38
The mole ratio of sulfur to oxygen = 1 : 3
The formula of oxide = SO₃
Mass of sulfur in B = 2.80 g
Moles of sulfur in B = 2.80/32
Moles of sulfur in B = 0.088 moles
Mass of oxygen in B = 2.80 g
Moles of oxygen in B = 2.80/16
Moles of oxygen in B = 0.175
The mole ratio of sulfur to oxygen = 0.088 : 0.175
The mole ratio of sulfur to oxygen = 1 : 2
The formula of oxide = SO₂
The oxygen atoms in A and B are in simple multiple ratio.
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oxygen cannot be liquified at room temperature but carbon dioxide can. what explains this difference? (room temperature is 293k)
The difference in boiling points for oxygen and carbon dioxide is due to their respective molecular structures.
Oxygen is a diatomic molecule, meaning it contains two oxygen atoms bonded together, while carbon dioxide is a triatomic molecule, meaning it contains three atoms (one carbon and two oxygen). This difference in number of atoms leads to differences in boiling point, as oxygen has a boiling point of -183°C (90K) and carbon dioxide has a boiling point of -78°C (215K). To further explain the difference in boiling points, it’s important to understand the intermolecular forces at play. When molecules are cooled to a certain temperature, they will enter into a liquid state. At this time, the molecules’ kinetic energy is outweighed by the attractive forces between them. Oxygen is able to liquefy at a lower temperature than carbon dioxide because it has weaker intermolecular forces.
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The following table was made to compare the different seismic waves. What correction needs to be made?
As you answer the following questions, write explanations for why your current answer is correct
It will be necessary to make the adjustment that Rayleigh as well as Love's waves go through both solids and liquids. Therefore, the correct option is option B.
What is seismic wave?An acoustic wave that passes through into the Earth or perhaps another planetary body is called a seismic wave. It can be caused by a major landslide, a volcanic eruption, a magma flow, an earthquake (or typically a quake), a massive man-made explosion that releases low-frequency acoustic energy, or an earthquake.
Seismologists study seismic waves, which they record using seismometers, hydrophones (under water), or accelerometers. It will be necessary to make the adjustment that Rayleigh as well as Love's waves go through both solids and liquids.
Therefore, the correct option is option B.
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Your question is incomplete but most probably your full question was,
"The following table was made to compare the different seismic waves. What correction needs to be made?
A. Rayleigh waves have a rolling movement and Love waves have a horizontal movement perpendicular to the wave.
B. Rayleigh and Love waves travel through solid and liquid.
C. Rayleigh and Love waves are body waves, and P-waves and S-waves are surface waves.
D. P-waves have a vertical movement perpendicular to the wave and D-waves have a compression movement."
CH4 (g) + H2O(g) → CO(g) + 3H2 (g) What is the volume of steam, H2O(g), needed to completely react with 53.50L of methane gas at a constant pressure and temperature? What is the volume of carbon monoxide, CO, produced? What is the volume of Hydrogen gas, H2, produced? What is the total volume of gas produced?
To solve this problem, we need to use stoichiometry to relate the volume of methane to the volumes of steam, carbon monoxide, and hydrogen produced.
The balanced chemical equation is:
CH4 (g) + H2O(g) → CO(g) + 3H2 (g)
The stoichiometric ratio of steam to methane is 1:1, so the volume of steam needed is also 53.50 L.
To determine the volumes of carbon monoxide and hydrogen gas produced, we need to use the stoichiometric coefficients in the balanced equation. For every 1 mole of methane consumed, 1 mole of steam is consumed, 1 mole of carbon monoxide is produced, and 3 moles of hydrogen gas are produced.
First, we need to convert the volume of methane gas to moles using the ideal gas law:
PV = nRT
n = PV/RT
n = (1 atm) x (53.50 L) / [(0.08206 L·atm/mol·K) x (298 K)]
n = 2.189 mol
Therefore, 2.189 moles of methane react with 2.189 moles of steam to produce 2.189 moles of carbon monoxide and 6.567 moles of hydrogen gas.
To convert the moles of each gas to volume, we use the ideal gas law again:
V = nRT/P
For carbon monoxide:
n = 2.189 mol
R = 0.08206 L·atm/mol·K
T = 298 K
P = 1 atm
V = (2.189 mol) x (0.08206 L·atm/mol·K) x (298 K) / (1 atm)
V = 53.68 L
For hydrogen gas:
n = 6.567 mol
R = 0.08206 L·atm/mol·K
T = 298 K
P = 1 atm
V = (6.567 mol) x (0.08206 L·atm/mol·K) x (298 K) / (1 atm)
V = 160.76 L
The total volume of gas produced is the sum of the volumes of carbon monoxide and hydrogen gas:
53.68 L + 160.76 L = 214.44 L
Therefore, the volume of steam needed is 53.50 L, the volume of carbon monoxide produced is 53.68 L, the volume of hydrogen gas produced is 160.76 L, and the total volume of gas produced is 214.44 L.
Answer: 185.5 L.
Explanation: To solve this question, we need to use the stoichiometry of the chemical reaction to determine the amounts of each gas produced. The balanced chemical equation is:
CH4 (g) + H2O(g) → CO(g) + 3H2(g)
According to the stoichiometry of the reaction, 1 mole of methane reacts with 1 mole of water to produce 1 mole of carbon monoxide and 3 moles of hydrogen. Therefore, we can use the ideal gas law to calculate the volumes of each gas produced.
Given that the initial volume of methane gas is 53.50 L, we can first calculate the number of moles of methane present using the ideal gas law:
PV = nRT
where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature. Since the pressure and temperature are constant, we can write:
n = PV/RT
where R = 0.08206 L atm/K mol is the gas constant.
n(CH4) = (1 atm)(53.50 L)/(0.08206 L atm/K mol)(298 K) = 2.23 mol
This means that 2.23 moles of methane react with 2.23 moles of water to produce 2.23 moles of carbon monoxide and 6.69 moles of hydrogen.
To determine the volume of water needed to react with all the methane, we can use the stoichiometry of the reaction again:
1 mol CH4 reacts with 1 mol H2O
Therefore, the number of moles of water required is also 2.23 mol. We can calculate the volume of water using the ideal gas law:
n(H2O) = PV/RT
V(H2O) = n(H2O)RT/P = (2.23 mol)(0.08206 L atm/K mol)(298 K)/(1 atm) = 46.4 L
Therefore, the volume of steam required to react with all the methane is 46.4 L.
Next, we can use the stoichiometry of the reaction to calculate the volumes of carbon monoxide and hydrogen produced:
1 mol CH4 produces 1 mol CO
1 mol CH4 produces 3 mol H2
Therefore, the number of moles of carbon monoxide and hydrogen produced are also 2.23 mol and 6.69 mol, respectively. We can calculate their volumes using the ideal gas law:
V(CO) = n(CO)RT/P = (2.23 mol)(0.08206 L atm/K mol)(298 K)/(1 atm) = 46.4 L
V(H2) = n(H2)RT/P = (6.69 mol)(0.08206 L atm/K mol)(298 K)/(1 atm) = 139.1 L
Therefore, the volume of carbon monoxide produced is 46.4 L and the volume of hydrogen produced is 139.1 L.
The total volume of gas produced is the sum of the volumes of carbon monoxide and hydrogen:
V(total) = V(CO) + V(H2) = 46.4 L + 139.1 L = 185.5 L
Therefore, the total volume of gas produced is 185.5 L.
Text me for any other issues.
when placed in solution, an inorganic substance dissociates completely, forming hydrogen ions and anions. this substance would be a
When placed in solution, an inorganic substance dissociates completely, forming hydrogen ions and anions, the substance is known as acids.
An electrolyte is a compound that dissociates into ions whilst dissolved in water. Electrolytes behavior electric powered cutting-edge in aqueous answers or in a molten state. An acid is a substance or compound that releases hydrogen ions (H+) whilst in solution. In a sturdy acid, which includes hydrochloric acid (HCl), all hydrogen ions (H+), and chloride ions (Cl-) dissociate (separate) whilst positioned in water and those ions are now not held collectively via way of means of ionic bonding. Acids are materials that once dissolved in water launch hydrogen ions, H+(aq). Bases are materials that react with and neutralize acids, generating water.
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how many flourine atoms are in 410 g of UF6
3.6 ×10²⁴ atoms fluorine are in 410 g of UF[tex]_6[/tex]. Fluorine is an atomic number 9 chemical element with both the symbol F.
What is fluorine?Fluorine is an atomic number 9 chemical element with both the symbol F. This is the smallest halogen as well as occurs as a very poisonous, pale yellow diatomic vapor under normal circumstances.
It is exceptionally reactive being the most electronegative active catalyst, reacting with all other elements save the light inert.
mole = 410 / 352.02 =1.16mole
number of atom= 1.16× 6.022×10²³=6.98×10²³
number of atom of fluorine =6× 6.98×10²³= 3.6 ×10²⁴ atoms
Therefore, 3.6 ×10²⁴ atoms fluorine are in 410 g of UF[tex]_6[/tex].
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a tlc of my product gives a rf of 0.37 using a 5:3 hexanes/ethyl acetate eluent. what would happen to the rf if the eluent was changed to 3:1 hexanes/ethyl acetate?
RF value will increase if the eluent was changed to 3:1 hexanes/ethyl acetate.
Explain about Rf value?
RF value (or Retention Factor) is a measure of a compound's retention time in a chromatographic process. It is calculated by dividing the retention time of a compound by the retention time of a reference compound (typically a known standard). RF values are used to compare the retention times of compounds within a given chromatographic system. They are also used to identify unknown compounds by comparing their retention time to a database of known compounds.
The change in the eluent composition will affect the retention factor (RF) of the product in the thin-layer chromatography (TLC) analysis. In general, a change in the eluent composition from 5:3 hexanes/ethyl acetate to 3:1 hexanes/ethyl acetate will result in a change in the RF value. It's difficult to predict exactly how the RF value will change without conducting the experiment, but it's possible that the RF value will increase with the new eluent. This is because increasing the concentration of hexanes and decreasing the concentration of ethyl acetate will result in a more nonpolar solvent, which may result in a stronger partitioning of the product into the solvent and a longer distance traveled up the TLC plate.
Therefore, the RF value will increase.
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Shawn has a bracelet made of an unknown metal. Shawn finds that the bracelet has a volume of 7 cm3 and a mass of 135 g. Which metal is the bracelet most likely made of?
The bracelet's density is 19.3 g/cm³, which is close to the density of gold (19.3 g/cm³) and silver (10.5 g/cm³). However, it's most likely made of gold due to its higher density.
To calculate the density of the b, divide the mass (in grams) by the volume (in cubic centimeters):
density = mass / volume
density = 135 g / 7 cm³
density = 19.3 g/cm³
Sine the density of the metal is relatively high, it's likely to be a dense metal like gold or platinum. However, the density of gold is 19.3 g/cm³, which is very close to the density of the bracelet. The density of silver is much lower, at 10.5 g/cm³, so it's less likely to be made of silver. Based on this information, it's most likely that the bracelet is made of gold.
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Which have more reactive concentrated hcl or dilute hcl acid
Concentrated HCl is considered to be more reactive than dilute HCl acid.
This is because concentrated HCl has a higher concentration of hydrogen ions (H+) compared to dilute HCl, meaning that it can more easily donate hydrogen ions in reactions and therefore be more reactive. This property is related to the acidity of the solution, which is determined by the concentration of hydrogen ions in the solution.Concentrated HCl is considered to be more reactive than dilute HCl acid. In general, the more hydrogen ions a solution contains, the more acidic the solution is and the more reactive it is.
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Titanium (IV) chloride reacts with solid magnesium to produce magnesium chloride and solid titanium via a single displacement reaction. How many grams of magnesium chloride are produced if 50g TiCI is completely reacted?
According to the stoichiometry of the reaction taking place between titanium (IV) chloride and magnesium chloride , 50.197 g of magnesium chloride are produced if 50 g TiCI is completely reacted.
What is stoichiometry?It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.In the given reaction, 189.67 g titanium (IV) chloride gives 190.42 g magnesium chloride, thus 50 g titanium (IV) chloride will give 50×190.42/189.67= 50.197 g
Thus,50.197 g of magnesium chloride are produced if 50 g TiCI is completely reacted.
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describe an atom: atoms are the basic units of matter. an atom has a dense containing positive and neutral surrounded by mostly empty and negative in the electron
Atoms are the basic building blocks of matter and are composed of three types of particles: protons, neutrons, and electrons.
The center of an atom, called the nucleus, contains positively charged protons and neutral neutrons. The number of protons in the nucleus is called the atomic number and determines what element the atom is.
Surrounding the nucleus are negatively charged electrons, which occupy shells or orbitals at various distances from the nucleus. The electrons are much lighter than the protons and neutrons and occupy most of the volume of the atom.
In summary, an atom can be described as a dense nucleus containing positively charged protons and neutral neutrons, surrounded by mostly empty space and negatively charged electrons.
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how do scientists know that the present co2 levels have not been observed in the past 800,000 years?
By determining the levels of carbon dioxide for over the past 800,000 years, it become evident that the levels of carbon dioxide in atmosphere were never high as it is now.
Determining carbon dioxide levels in atmosphere are done by detecting the amount in air trapped in ice cores for thousands of years, by detecting the amount of carbon dioxide in tree rings and by chemical analysis of ocean sediments.
It means that atmospheric carbon dioxide have reached levels that were not seen for over 800,000 years. The atmospheric concentration last year has reached 405 ppm. Its effect along with other global warming gases like methane and nitrous oxide, higher temperatures were observed in most countries.
So scientists now know that only before 800,000 years, long before humans inhabited the planet, that the carbon dioxide levels are reaching this high.
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the conformation of the backbone of a polypeptide is described completely by the angle(s) of rotation about which bond(s)?
The conformation of a polypeptide's backbone is described by the angles of rotation about the peptide bonds.
The most common type of conformation is an alpha helix, in which the peptide bond rotates at an angle of approximately 100 to 120 degrees in a clockwise direction. This arrangement of the peptide bond contributes to an increase in the stability of the polypeptide, as the bonds form hydrogen bonds between the amino acids. This arrangement also allows for more efficient folding of the polypeptide, allowing for better functionality of the proteins involved. To calculate the angle of rotation for a given polypeptide, the bond length, bond angle, and torsional angle must all be known. First, the bond length must be determined from the x-ray data.
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Write a paragraph to explain how the transformation of water from one state of matter to another is important for the water cycle.The paragraph has to start with these words”The water cycle depends on the transformation of water into different forms.Starting as liquid,water can:
Evaporate then condense then precipitate then runoff
Explanation:
greenhouses use this information
lot of cold places like in russia have greenhouses to grow crops
you make a mini version of a greenhouses in your home with a soda bottle
Water Cycle Transformations
The water cycle depends on the transformation of water into different forms. Starting as liquid, water can:
Evaporate: The transformation of liquid water into water vapor is important for the water cycle. When water on the Earth's surface, such as in oceans, lakes, and rivers, is heated by the sun, it turns into water vapor and rises into the atmosphere.
Condense: As the water vapor rises, it cools and transforms back into liquid water through a process called condensation. This is important because the water droplets eventually form clouds, which can lead to precipitation.
Precipitate: Precipitation is another important transformation of water in the water cycle. When the clouds become heavy with water droplets, they release the water in the form of rain, snow, sleet, or hail.
Runoff: The water that falls to the ground in precipitation can then flow over the surface of the land, as runoff, eventually making its way back into the oceans, lakes, and rivers, where the cycle starts again.
The transformation of water from one state of matter to another is essential for the water cycle because it ensures that water is continually recycled and available for plants, animals, and humans to use. Without these transformations, the water on Earth would not be able to sustain life as we know it.
chatgpt
Balance the equation. Please explain how to do that with the parenthesis, thats the part I’m confused about.
Answer:
2 Fe + 3 (H2SO4) = Fe2(SO4)3 + 3H2
Explanation:
Hello, always remember that balancing equations is having one side(the reactants) equal to the same amount as the other side(the products). In this example you would like to look on each side and see what has more of what and how you can equal it.
1. First add a 2 Coefficient to Fe because there is 2 Fe on the product side due to Fe2(SO4)3
2. In Fe2(SO4)3 we can see the 3 at the very end that is distributed to the Sulfur and Oxygen. This means we have to go to the other side due to SO4 only being distributed by nothing, there is no 3 so that is why we put a 3 coefficient in front of H2SO4.
3. Because we put that 3 in front of H2SO4, this cause the hydrogen on the product sign to be imbalanced so we put a 3 coefficient infront of the H2 on the product side.
*Always remember to multiply the coefficient and/or subscripts.
a scientist begins this experiment with 3 m a(g) and 3 m b(g). after running the experiment, she notices the concentration of a(g) is 0.75 m. what are the concentrations of the other two components?
The concentration of b(g) is 2.25 m, and the concentration of a(g) is 0.75 m.
Since the total amount of the two components, a(g) and b(g), remains constant throughout the experiment, the total concentration after the experiment can be expressed as:
3 m (a(g)) + 3 m (b(g)) = 0.75 m (a(g)) + b(g)
Rearranging this equation and solving for b(g), we find that:
b(g) = 3 m (a(g)) + 3 m (b(g)) - 0.75 m (a(g))
b(g) = 3 m - 0.75 m
b(g) = 2.25 m
What are the two components of concentration?
Concentration is determined mathematically by taking the mass, moles, or volume of solute and dividing it by the mass, moles, or volume of solution (or, less commonly, the solvent).
What are the components of the concentration of a solution?
Many solutions contain one component, called the solvent, in which other components, called solutes, are dissolved. An aqueous solution is one for which the solvent is water. The concentration of a solution is a measure of the relative amount of solute in a given amount of solution.
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Methane gas (CH4) effuses 3. 4 times faster than an unknown gas. Determine the molar mass of the unknown gas. Show your work or explain your answer, giving specific values used to determine the answer
The molar mass of the unknown gas is 184.96 g/mol.
Graham's law of diffusion states that "the rate of diffusion of a gas is inversely proportional to the square root of the molar mass".
R ∝ 1/ √M
R₁/R₂ = √(M₂/M₁)
Rate of unknown gas (R₁) = R
Rate of CH₄ (R₂) = 3.4R
Molar mass of CH₄ (M₂) = 16 g/mol
Molar mass of unknown gas (M₁) =?
The molar mass of the unknown gas can be obtained as follow:
R₁/R₂ = √(M₂/M₁)
R / 3.4R = √(16 / M₁)
1 / 3.4 = √(16 / M₁)
Squaring both sides
(1 / 3.4)² = 16 / M₁
Cross multiplying
(1 / 3.4)² × M₁ = 16
Dividing both sides by (1 / 3.4)²
M₁ = 16 / (1 / 3.4)²
M₁ = 184.96 g/mol
Hence, the molar mass of the unknown gas is 184.96 g/mol.
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How many base units are there in the code for one amino acid?
There are three base units in the code for one amino acid.
What are the 3 bases that code for an amino acid?
Codons are made up of any triplet combination of the four nitrogenous bases adenine (A), guanine (G), cytosine (C), or uracil (U). Of the 64 possible codon sequences, 61 specify the 20 amino acids that makeup proteins and three are stop signals.
What is the 3 base code?
A three-base sequence in DNA or RNA is known as a codon. The codes in the coding strand of DNA and in messenger RNA aren't, of course, identical, because in RNA the base uracil (U) is used instead of thymine (T).
Why do codons have 3 bases?
The more bases there are per codon the more information you can code for. There are only 22 different amino acids, in consequence, we need a minimum of 3 bases per codon.
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2) The current in a metallic conductor is a flow of A) Negatively charged electrons B) Negatively charged protons C) Positively charged electrons Positively charged protons D)
Answer:
c.Positively charged electrons
Why does a lump of cotton wool shrink in water?
Answer: Sufficient volume of air is present in lump of cotton wool. then dipped in water, this air goes out due to which the cotton lump shrunk.
yes
How many moles of HCI are needed to produce 2.5 moles of KCI?
The reaction for the production of potassium chloride from hydrochloric acid and potassium hydroxide is:
HCl + KOH → KCl + H2O
From the reaction, it takes 1 mole of HCl to produce 1 mole of KCl.
So, to produce 2.5 moles of KCl, we would need 2.5 moles of HCl.
What is a reaction?In chemistry, a reaction is a process by which one or more compounds change into one or more other ones. Chemical bonds between atoms or molecules are often broken and new ones are generated as a result of this transition. Energy can be released or absorbed during reactions, which can happen naturally or be produced by a number of factors like heating, cooling, adding a catalyst, or being exposed to light.
In a chemical reaction, the atoms that make up the reactants are rearranged to produce various products. In contrast to the reactants, the products have diverse properties. Physical changes, which include state transitions like ice melting to water and water evaporating to vapor, are different from chemical processes.
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the density of solid cu is 8.96 g/cm3. how many atoms are present per cubic centimeter (cm3) of cu?
Solid cu has an 8.96 g/cm3 density. Per cubic centimeter (cm3) of cu, there are 3.61*10⁻⁸ atoms.
Molar mass of Cu = 63.546 gm/mol
according to avogadro's law, 1 mol of a substance contains 6.022*10²³ atom
thus, 63.546 gm Cu contains 6.022*10²³ atom
density of Cu = 8.96g/cm³ that mean 1 cm3 contain 8.96 gm Cu
we have to calculate 63.546 gm Cu containing 6.022*10²³ atom then 8.96 gm Cu contains how many atom calculations are given as below.
63.546/8.96 = 6.022*10²³?
? = 6.022*10²³*8.96/63.546
=8.494*10²² atom
1 cubic centimeter of Cu contains 8.494*10²² atom
Cu adopts FCC unit cell so contains 4 atoms in each unit cell
one cubic centimeter contains 8.494*10²² atom
therefore one cubic centimeter contains 8.494*10²²/4 =2.1235*10²² unit cell
2.1235*10²²unit cell have volume 1 cm³then 1 unit cell have volume 1/2.1235*10²² =4.72*10⁻²³ cm3
Edge = (4.72*10⁻²³ cm³)1/3 =3.61*10⁻⁸cm
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Why are foods that have a high pH pressure processed?
a. the higher pressure helps tenderize and make them edible
b. their low acidity makes them more prone to microbial growth
c. the shorter processing time preserves more of their nutrients
d. all of the above
write the balanced chemical equation for the reaction between solid aluminum and aqueous solution of copper(ii) chloride.
A chemical reaction is said to be balanced if the number of atoms on the reactant and product sides are equal.
The conservation of mass and momentum is observed.
Reaction:
Al (s)+ CuCl2---> AlCl3+ Cu
Aluminum and copper precipitate are produced when copper chloride and aluminum combine.
Element Reactant Product
Al 1 1
Cu 1 1
Cl 2 3
The chlorine is not balanced.
2Al (s)+ 3CuCl2---> 2AlCl3+ 3Cu
element reactant product
Al 2 2
Cu 3 3
Cl 6 6
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Aqueous copper (II) sulfate and solid iron interact to form solid copper and aqueous iron (II) sulfate.
Fe = Iron. CuSO4 = copper (II) Sulfate. Cu = Copper. Sulfate of iron (II) = FeSO4. copper and iron (II). Copper + Iron (II) sulphate > sulphate. Cu(s) + FeSO4 (s) > Fe(s) + CuSO4 (aq) (aq). The previous equation is balanced. Fe(s) + CuSO4 (aq) —> Cu(s) + FeSO4 is the reaction's balanced equation (aq). Cu(OH)2(s) + 2 KCl(aq) = CuCl2(aq) + 2KOH(aq). The precipitate created in the aforementioned reaction, Cu(OH), is an illustration of a precipitation reaction. CuCl2: It has a solid, yellow-brown hue. KOH: Potassium hydroxide; it has a white, solid, deliquescent look. The generation of a solid form residue occurs during precipitation reactions, which are typically double displacement processes. When cations and anions in an aqueous solution interact, precipitate is created.
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the ratio of effusion of an unknown diatomic gas to oxygen is 0.50:1. what is molar mass of the unknown gas?
The molar mass of the unknown gas is 8.05 g/mol.
The ratio of effusion of an unknown gas to oxygen is 0.50:1, which means that the effusion rate of the unknown gas is half that of oxygen. Effusion is the process by which a gas escapes through a tiny hole into a vacuum, and the rate of effusion is directly proportional to the square root of the gas' molar mass. So, we can use this relationship to calculate the molar mass of the unknown gas.
Let's assume that the molar mass of oxygen is 32 g/mol. Then, the square root of the molar mass of oxygen is √32 = 5.66. If the effusion rate of the unknown gas is half that of oxygen, then the square root of its molar mass is 0.5 * 5.66 = 2.83. Taking the square of 2.83 gives us 8.05, which is the molar mass of the unknown gas.
Therefore, the molar mass of the unknown gas is 8.05 g/mol.
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suppose you mix 100.0 g of water at 24.2 oc with 75.0 g of water at 78.7 oc. what will be the final temperature of the mixed water, in oc?
The final temperature of mixing 100.0 g of water at 24.2°C with 75.0 g of water at 78.7°C is 46.77⁰C
Let the Final Temperature be T
Heat flow equation:
q = ± mcΔT
m = mass
c = Specific heat
ΔT = Temperature difference.
Heat lost by hot water = 75 g x c x (77 - T)
Heat gained by cold water = 100g x c x (T- 24.1)
When it is mixed.
Heat gained = Heat lost
75 g x c x (77 - T) = 100g x c x (T- 24.1)
5775 - 75T = 100T – 2410
575 + 2410 = 1007 + 75T
8185 = 175T
T = 8185/175
T = 46.77⁰C
The final temperature of mined water = 46.77⁰C
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