The theoretical yield for this reaction is 78.61 g of CO2 and the percent yield is 20.0%, when 50.0 g of MgCO3 react completely with H3PO4.
What is theoretical yield?The theoretical yield is the maximum amount of product that can be produced from a chemical reaction, calculated using the stoichiometry of the reaction equation. It is based on the assumption that the reaction proceeds perfectly, without any loss or waste of reactants, and without any interference from side reactions.
The theoretical yield is calculated by determining the number of moles of each reactant, using the balanced chemical equation to calculate the number of moles of product that can be produced, and then converting this to the corresponding mass of product. It is a useful reference for determining the efficiency of a reaction and for evaluating the quality of the results obtained in a laboratory experiment.
Calculation of Theoretical yield
To calculate the theoretical yield, determine the number of moles of MgCO3 and use the balanced chemical equation to calculate the number of moles of CO2 produced.
The number of moles of MgCO3 is given by:
n(MgCO3) = m(MgCO3) / M(MgCO3)
n(MgCO3) = 50.0 g / 84.31 g/mol
n(MgCO3) = 0.595 mol
Using the balanced chemical equation, calculate the number of moles of CO2 produced:
n(CO2) = 3 * n(MgCO3)
n(CO2) = 3 * 0.595 mol
n(CO2) = 1.785 mol
The mass of CO2 produced can then be calculated:
m(CO2) = n(CO2) * M(CO2)
m(CO2) = 1.785 mol * 44.01 g/mol
m(CO2) = 78.61 g
This is the theoretical yield for the reaction.
The percent yield is a measure of the efficiency of the reaction, and is calculated as the ratio of the actual yield to the theoretical yield, multiplied by 100:
% yield = (actual yield / theoretical yield) * 100
% yield = (15.8 g / 78.61 g) * 100
% yield = 20.0%
To know more about Theoretical Yield, visit:
https://brainly.com/question/25996347
#SPJ1
explain why the lower vapor pressure for a solution containing a nonvolatile solute results in a higher boiling point and lower melting point compared to the pure solvent.
The lower vapor pressure results in a depressed freezing point. As a result, the graph shifts, and the triple point is lowered resulting in a lower melting point.
The boiling factor of a substance is the temperature at which the vapor stress of a liquid equals the stress surrounding the liquid and the liquid modifications right into a vapor. the warmth of vaporization is the energy required to convert a given amount (a mol, kg, pound, and so on.) of a substance from a liquid right into gasoline at a given pressure (frequently atmospheric stress).
The boiling point of a liquid varies consistent with the carried-out strain; the normal boiling point is the temperature at which the vapor stress is equal to the same old sea-stage atmospheric pressure (760 mm [29.92 inches] of mercury). At sea level, water boils at 100° C (212° F). The boiling factor of a natural substance is the temperature at which the substance transitions from a liquid to the gaseous phase.
To learn more about Boiling point visit here:
brainly.com/question/28203474
#SPJ4
a system is in a macrostate compatible with 5.49 x 108 possible microstates. what is the corresponding value of the entropy?
The corresponding value of the entropy is 28.35*10^-23 J/K.
Entropy is the extent of randomness (or disorder) of a system. It may also be notion of as a degree of the strength dispersal of the molecules withinside the system. Microstates are the wide variety of various feasible preparations of molecular role and kinetic strength at a specific thermodynamic state.
The entropy can be calculated as,
S=k ln W
Here, W= number of microstates, K= Boltzmann's constant, the value for k= 1.38 *10^-23 J/K
The microstates are given that are 8.39*10^8
Substituting the values in the above formula,
S =1.38*10^-23 ln (8.39*10^8)
= 1.38*10^-23 * 20.548
=28.35*10^-23 J/K
To learn more about entropy check the link below:
https://brainly.com/question/30355655
#SPJ4
_____________ is the method of determining the concentration of a solution of unknown concentration by adding a controlled and measured amount of a solution of a known concentration until a desired chemical reaction occurs.
Titration is the method of determining the concentration of a solution of unknown concentration by adding a controlled and measured amount of a solution of a known concentration until a desired chemical reaction occurs.
In titration, the solution of known concentration is called the titrant, and the solution of unknown concentration is called the analyte. The reaction between the two solutions is carefully monitored by observing a change in physical properties, such as color, or by measuring a change in the conductivity or pH of the solution. The volume of titrant needed to cause the reaction is used to calculate the concentration of the analyte. Titration is widely used in analytical chemistry, quality control, and industrial processes to determine the precise concentration of a variety of substances in solution.
Learn more about Titration:
brainly.com/question/2728613
#SPJ4
an experimental plot of ln(k) vs. 1/t is obtained in lab for a reaction. the slope of the best-fit line for the graph is -4755 k. what is the value of the activation energy for the reaction in kj/mol?
The activation energy for the reaction in kJ/mol can be calculated from the slope of the best-fit line for the graph.
The equation for calculating the activation energy is: Ea = -slope x R, where R is the ideal gas constant. Plugging in the slope of -4755 K and the ideal gas constant of 8.314 J/mol K gives an activation energy of -39,092 kJ/mol.
The activation energy of a reaction is an important factor in determining the rate at which the reaction occurs. It is typically measured in kJ/mol and is the minimum amount of energy required for the reaction to take place. The higher the activation energy, the slower the reaction will be.
Learn more about the activation energy :
https://brainly.com/question/26724488
#SPJ4
extra step here! can you catch it while dropping off your recycling you are over come by the urge to weigh the tin cans you brought in. you find that the mass of cans in the box you brought had a mass of 23kg. how many moles do you have
55.845 g/mol of the mass of cans in the box we brought had a mass of 23kg. 411.74 mol moles we have.
To determine the number of moles of tin cans you have, we need to know the molar mass of the metal that the cans are made of. Tin cans are usually made of steel, which is an alloy made primarily of iron and carbon, with small amounts of other elements.
To convert the mass of the cans (23 kg) to moles, we need to use the following formula:
moles = mass / molar mass
moles = 23,000 g / 55.845 g/mol = 411.74 mol
Therefore, the number of moles of iron in the 23 kg of tin cans is approximately 411.74 mol.
Learn more about molar mass here:
https://brainly.com/question/12127540
#SPJ4
what volume of oxygen gas at stp would be needed for the complete combustion of 10 g of octane? free
35.3 L volume of gas at stp would be needed for the complete combustion of 10 g of octane
The volume of oxygen gas needed for the complete combustion of 10 g of octane is 35.3 L at STP.
The chemical equation for the complete combustion of octane (C8H18) is:
2C8H18 + 25O2 -> 16CO2 + 18H2O
From the equation, we can see that for every one mole of octane burned, 25 moles of oxygen are needed. The number of moles of octane can be calculated using its molecular weight (114 g/mol) and the given mass: 10 g / 114 g/mol = 0.087 moles.
Using the stoichiometry of the reaction, we can calculate the number of moles of oxygen needed: 0.087 moles x 25 moles O2/mole C8H18 = 2.18 moles of O2.
Finally, we can convert the number of moles of oxygen to volume at STP (Standard Temperature and Pressure: 0°C and 1 atm): 2.18 moles x 22.4 L/mole = 35.3 l
Learn more about oxygen here:
https://brainly.com/question/13370320
#SPJ4
11. What state is this substance in at 100 degrees, and how do you know?
The boiling point is the temperature at which liquids begin to boil.The temperature stays constant as the liquid begins to boil until all of the liquid has been transformed into a gas.Water typically boils at a temperature of 100oC.
What does the substance look like at 100 C? The boiling point is that temperature.Once the liquid begins to boil, the temperature doesn't change until all of the liquid has been transformed into a gas.Water normally reaches its boiling point at 100oC.If the melting and boiling points of an object are known, its state at a particular temperature can be predicted.How to solve this is outlined in the table.The temperature at which oxygen melts and boils is both -218°C.VAPORIZATION .Water molecules become dissociated from the forces holding them together in the liquid state when it reaches its boiling point of 100oC.As a result, the liquid turns into a gas and is vaporized.To learn more about boiling point refer
https://brainly.com/question/40140
#SPJ1
calculate the amount of heat needed to melt of solid ethanol () and bring it to a temperature of . be sure your answer has a unit symbol and the correct number of significant digits.
209.8J of heat needed to melt of solid ethanol () and bring it to a temperature of -10°c.
To calculate the amount of heat needed to melt solid ethanol and bring it to a certain temperature, we need to use the specific heat capacity and the heat of fusion of ethanol, as well as the mass of the sample and the temperature change.
The heat required to melt the solid ethanol:
Q1 = [tex]m × ΔH_fusion[/tex] = 1 g × 109 J/g = 109 J
The heat required to raise the temperature of the liquid ethanol from the melting point to -10 °C:
The total heat required is the sum of Q1 and Q2:
Q = Q1 + Q2 = 109 J + 100.8 J = 209.8 J
Therefore, the amount of heat needed to melt 1 gram of solid ethanol and bring it to a temperature of -10 °C is 209.8 J.
Learn more about heat here:
https://brainly.com/question/4978085
#SPJ4
What is the nature of CX bond in alkyl halide?
Haloarenes have polarized C-X bonds because halogens are more electronegative than carbon. Halogen acquires a tiny negative charge due to its high electronegativity, whereas carbon acquires a slight positive charge by drawing the electron cloud more strongly towards it.
Only one sigma bond is created between one carbon atom and one halogen atom because halogens only require one electron to attain their closest noble gas state.
Dipole moment is a function of the electronegativity differential between halogens and carbon, and as we are aware, when halogen electronegativity drops within a group, so does the dipole moment. Dipole moments between C-Cl and C-F are an exception.
to know more about electronegativity visit
https://brainly.com/question/29597673
#SPJ4
calculate the equilibrium concentrations of nh3 and h2s if a sample of solid nh4hs is placed in a closed vessel and decomposes until equilibrium is reached
If a sample of solid nh4hs is put in a closed vessel and allowed to break down until equilibrium is reached, the concentrations of nh3 and h2s are at their equilibrium values, which are 0.011 m.
1.2 x 104 = [NH3][H2S] where [NH3] = [H2S] = square root 1.2 x 10^-4 = 0.011 M
The concentrations of NH3, H2, and N2 are respectively 1.2102, 3.0102, and 1.5102M at equilibrium. In the flask, NH3 and H2S gases are produced as ammonium hydrogen sulphide breaks down. Total pressure in the flask increases to 0.84 atm when the decomposition reaction achieves equilibrium. At this temperature, the equilibrium constant for the breakdown of NH4HS is. Fear not! K=[Lmol]−2=L2mol−2. The equilibrium expression for the reaction N2 + 3H2 2NH3 can be expressed as K [NH3]2/[N2] [H2]3.
Learn more about decomposition reaction here:
https://brainly.com/question/16987748
#SPJ4
do you think we can use the flame test to determine the identity of unknowns in a mixture? why or why not?
Yes, the flame test can be used to determine the identity of certain unknowns in a mixture, but it is not a foolproof method and has some limitations.
The flame test is based on the principle that when a metal ion is heated, it will emit light at a characteristic frequency, which results in a unique color. By observing the color of the flame produced by a sample, it is possible to determine the presence of certain metal ions, such as sodium (yellow), potassium (purple), lithium (red), and copper (green).
However, this method has some limitations. The color of the flame produced by a sample may be affected by the presence of other elements in the mixture, which can produce similar colors or interfere with the interpretation of the results. In addition, not all metal ions produce a distinctive color in the flame test, and some elements cannot be detected by this method at all.
Therefore, while the flame test can be a useful tool for identifying certain elements in a mixture, it is not a definitive method and should be used in conjunction with other techniques to confirm the results.
To learn more Flame test :
https://brainly.com/question/29570891
#SPJ4
at the ph of most body fluids, which functional group will lose a proton (h ion) and whichfunctional group will accept a proton?
In most body fluids, the pH is around 7.4, which is slightly basic. At this pH, the functional group that will lose a proton (H+) is the acidic functional group, such as a carboxylic acid (-COOH) or a sulfonic acid (-SO3H). These functional groups are protonated at a low pH, meaning they have a hydrogen ion (H+) attached to them.
When the pH increases to 7.4, the H+ ion will detach from the acidic functional group, resulting in the formation of a negatively charged species called the conjugate base.On the other hand, the basic functional group, such as an amine (-NH2), will tend to accept a proton (H+) at a pH of 7.4. This will result in the formation of a positively charged species called the protonated amine.
It's important to note that the pH of body fluids can vary in different parts of the body, and the precise pKa values of specific functional groups can also affect their behavior. Additionally, the specific chemical environment and the presence of other compounds can also influence the protonation of functional groups in body fluids
learn more about proton here:
https://brainly.com/question/1252435
#SPJ4
HELP ME SOMEBODY PLEASE HELP!
a stream traveling at 5cm/s slows to 0.04cm/s. Which particle size deposit first?
The particle size that deposits first in a stream that slows from 5 cm/s to 0.04 cm/s is determined by the settling velocity of the particles, which is a function of the particle size, shape, and density, and the fluid velocity. It is likely that the larger and denser particles will deposit first in the stream as it slows from 5 cm/s to 0.04 cm/s.
What is meant by settling velocity?Settling velocity is the speed at which a particle will sink to the bottom of a fluid due to gravity. Particles with a higher settling velocity will settle faster than those with a lower settling velocity.
What if the fluid velocity decreases?If the fluid velocity decreases, the relative velocity between the fluid and the particles also decreases. This can make it easier for particles to settle out of suspension and deposit at the bottom of the fluid.
To know more about Fluids, visit here:
https://brainly.com/question/2493049
#SPJ1
Choose equations describing two different ways in which benzyl ethyl ether could be prepared by a williamson ether synthesis
The correct option is B and C. The two different ways in which benzyl ethyl ether could be prepared by a Williamson ether synthesis
it's in reality a count number of creating connections or putting things together. We synthesize information naturally to assist others to see the connections among matters. For instance, whilst you document to a friend the things that numerous different buddies have said about a track or film, you are engaging in synthesis.
it's far the method of combining two or extra additives to produce an entity. In biochemistry, it refers back to the production of an organic compound in a residing aspect, especially as aided by using enzymes. it is the method of combining or greater components to produce an entity. In biochemistry, it refers to the production of a natural compound in a living factor, particularly as aided through enzymes.
To learn more about Synthesis visit here:
brainly.com/question/29763759
#SPJ4
photoelectron spectroscopy is used to remove one electron from an atom or molecule. this process was used to remove one electron from potassium. how many different ionization energy bands were found? (ignore effects from spin).
One can observe two ionization energy bands in the photoelectron spectra of potassium.
The number of ionization energy bands that can be found in photoelectron spectroscopy depends on the specific atom or molecule being studied, as well as the conditions under which the spectroscopy is performed.
For potassium, the most common form of photoelectron spectroscopy is X-ray photoelectron spectroscopy (XPS), which typically results in the observation of two ionization energy bands one corresponding to the removal of an electron from the 1s orbital and another corresponding to the removal of an electron from one of the higher-energy orbitals, such as the 2p or 2s orbitals.
It's worth noting that the number of ionization energy bands observed can be influenced by various factors, such as the level of energy resolution of the spectrometer and the presence of impurities or other chemical species in the sample. Additionally, the presence of spin-orbit coupling can give rise to additional, splitted peaks in the XPS spectra, which would increase the number of ionization energy bands observed.
To learn more about Ionization energy :
https://brainly.com/question/15702918
#SPJ4
What is the density of 1 mole of carbon dioxide in 11.2 L?
The density of 1 mole of carbon dioxide in 11.2 litres at Standard Temperature and Pressure (STP) is 1.984 grams per litre.
How do you find the density?
The density of a gas is equal to its mass divided by its volume. If we know the density of the gas, we can calculate the molar mass of the substance. Density varies with temperature and pressure. The formula D = M/V is used in STP, where M equals the molar mass and V is the molar volume of the gas (22.4 liters/mol).
This density is calculated by dividing the molar mass of carbon dioxide by the molar volume of any gas at STP .
Here,
D = M/V
D = 44.01 /22.4
D = 1.984 grams per litre
Therefore, The density of 1 mole of carbon dioxide in 11.2 litres at Standard Temperature and Pressure (STP) is 1.984 grams per litre.
To learn more about Density, click on the given link: https://brainly.com/question/26364788
#SPJ1
Describe and explain what happens when a spatula of potassium manganate (VII) is added to water.
Answer:
If a crystal of a coloured soluble chemical, eg potassium manganate(VII), is placed in water, the particles spread out and mix with the water particles. When the potassium manganate(VII) has dissolved it becomes the solute . The water is the solvent . The mixture that results is the solution .
yes have very good day
what mass of sucrose (c12h22o11) should be combined with 501 g of water to make a solution with an osmotic pressure of 8.55 atm at 300 k ? the density of the solution is 1.08 g/ml.
Approximately 495 g of sucrose (C12H22O11) is needed to be combined with 501 g of water to make a solution with an osmotic pressure of 8.55 atm at 300 K.
To calculate the mass of sucrose needed to make a solution with an osmotic pressure of 8.55 atm at 300 K, we can use the Van't Hoff equation:
Π = i * R * T * C
Where Π is the osmotic pressure, i is the van't Hoff factor (number of particles produced from each molecule of solute in solution), R is the gas constant (8.31 J/mol*K), T is the temperature (300 K), and C is the concentration of the solute in mol/L.
Since the density of the solution is given as 1.08 g/ml, we can convert it to concentration in mol/L:
C = m/V = (m/V) * (V/n) = (m/V) * (n/M) = (m/V) * (n/M)
C = (mass of solute / volume of solution) * (number of moles / molar mass of solute)
Let's assume the mass of sucrose needed is m.
C = (m / (501 g + m)) * (n / 342 g/mol)
Π = i * R * T * (m / (501 g + m)) * (n / 342 g/mol)
Solving for m, we get:
m = (Π * (501 g + m) * 342 g/mol) / (i * R * T)
m = (8.55 atm * (501 g + m) * 342 g/mol) / (8.31 J/mol*K * 300 K)
The mass of sucrose needed is approximately 495 g.
Learn more about sucrose:
https://brainly.com/question/28869238
#SPJ4
all of the following are ways in which fatty acids can differ from one another except: a. number of double bonds. b. degree of saturation. c. chain length. d. average number of kcals per gram.
All of the following are ways in which fatty acids can differ from one another except chain length and degree of saturation.
Fatty acids can be classified according to the length of their chain, for example, in short (if it has less than 8 carbons), medium (between 8-12 carbons), long (between 12-18 carbons) and very long (if it has less than 18 carbons); they are also classified according to their degree of unsaturation, in saturated, monounsaturated and polyunsaturated; and according to the isomerism in cis and trans fatty acids.
A fatty acid is different from others in various ways. Some examples are as double bonds they have, saturation level how long a fatty acid chain is.
Learn more about Fatty acids:
brainly.com/question/24346132
#SPJ4
the 3c molecule still has a lot of energy available. where, specifically, is this energy located in this 3-carbon molecule?
the energy is located in this 3-carbon molecule as chemical bonds and thermal energy.
The energy in a 3-carbon molecule can be stored in various ways, depending on the specific molecule and its state. Here are some common places where energy can be stored in a 3-carbon molecule:Chemical Bonds: Energy can be stored in the chemical bonds of the molecule, as a result of the arrangement of the electrons in the molecule. Breaking these bonds releases energy, as the electrons rearrange to form new bonds.Electrons: Energy can also be stored in the arrangement of electrons in the molecule. This can be seen in the electron configuration of the molecule, and the amount of energy stored depends on the distance between the electrons and the nuclei of the atoms.Thermal Energy: The 3-carbon molecule can also store energy in the form of thermal energy, as a result of the movement and vibrations of the atoms in the molecule.Conformational Energy: Energy can also be stored in the 3-carbon molecule due to its conformation, or shape. Changing the shape of the molecule requires energy input, and the energy stored in the new conformation can be released when the molecule returns to its original shape.In conclusion, the energy in a 3-carbon molecule can be stored in various forms, including chemical bonds, electrons, thermal energy, and conformational energy.
Learn more about 3-carbon molecule
brainly.com/question/14192136
#SPJ4
if a 0.50 m solution of k2so4 is slowly poured into a beaker containing 0.25 m barium nitrate and 0.30 m lead (ii) nitrate at 25o c, what will be the first precipitate that forms? ksp for barium sulfate is 1.1 x 10-10 and ksp for lead (ii) sulfate is 1.6 x 10-8 .
Barium sulfate is firstly precipitate because Ksp is less than Ksp of lead sulfate.
The solubility product (Ksp) is a constant obtained from the product of the concentrations of poorly soluble ions raised to the power of the ionization equilibrium reaction coefficient.
Ksp for barium sulfate = 1.1 x 10⁻¹⁰
Ksp for lead (ii) sulfate = 1.6 x 10⁻⁸
Reaction takes:
BaSO₄ → Ba²⁺ + SO₄²⁻
[SO₄²⁻] = Ksp/[BaSO₄]
[SO₄²⁻] = 1.1 x 10⁻¹⁰/0.30
[SO₄²⁻] = 3.7 x 10⁻¹⁰
Now
PbSO₄ → Pb²⁺ + SO₄²⁻
[SO₄²⁻] = Ksp/[Pb²⁺]
[SO₄²⁻] = 1.6 x 10⁻⁸/0.25
[SO₄²⁻] = 6.4 x 10⁻⁸
So according to the above calculation, we may Calculation: BaSO₄ will be the first precipitate that forms, and [SO₄²⁻] will reach 3.7 x 10⁻¹⁰ M before it reaches 6.4 x 10⁻⁸ M.
Learn more about barium sulfate at https://brainly.com/question/2560103
#SPJ4
the process of physical weathering and erosion shape earth's landforms by:
A. Expanding the elevation of earths surface.
B. Decreasing the elevation of earths surface.
C. Changing the composition of earths surface.
D. Increasing rock layers near earths surface.
The process of physical weathering and erosion shape earth's landforms by decreasing the elevation of earths surface. Option B
What is physical weathering?Physical weathering, also known as mechanical weathering, is the breaking down of rocks, soils and minerals into smaller fragments due to physical processes such as freeze-thaw cycles, exfoliation, abrasion and salt crystal growth. These processes do not change the chemical composition of the material, but rather alter its physical structure and size.
This is one pf the ways that the rock can be able to break down.
Learn more about physical weathering :https://brainly.com/question/29616084
#SPJ1
What mass of hydrogen gas is produced from complete reaction of 2.00 g of sodium metal with excess water? The only other product of the reaction is sodium hydroxide.
According to the stoichiometry of the balanced chemical equation for formation of sodium hydroxide the mass of hydrogen gas produced from complete reaction of 2.00 g of sodium metal with excess water is 0.086 g.
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 chemical equation, 46 g sodium gives 2 g hydrogen , thus 2 g sodium gives 2×2/46=0.086 g.
Thus,the mass of hydrogen gas produced from complete reaction of 2.00 g of sodium metal with excess water is 0.086 g.
Learn more about stoichiometry,here:
https://brainly.com/question/9743981
#SPJ1
How many molecules of water are there in 1. 222 grams of water
1.22 grams of water has 5.0 x10^22 H2O water molecules.
A molecule is a group of two or more atoms held together by attractive forces known as chemical bonds. There is no guarantee that the term will include ions that meet this criterion, depending on the context.
Calculate the number of moles of water = mass / molar mass of water
Moles = 1.2 g/ 18 g/mol = 0.083 mol H2O
1 mole of any substance = 6.02 x 10^23 H2O molecules (Avogadro's number)
Resolution:
Molecules = 0.083 moles (6.02 x 10^23 H2O molecules/mole)
= 0.5 x 10^23 or 5.0 x10^22 H2O molecules
answer:
Number of molecules = 5.0 x 10^22 H2O molecules
Learn more about Molecules
brainly.com/question/14130817
#SPJ4
Please help!
Given the equation C3H8(g)+5O2(g) balanced to 3CO2(g)+4H2O(g)+2220kj, how much heat is produced when 80.0g of O2 react?
Thank you to whoever answers!
Taking into account the definition of enthalpy of a chemical reaction, the quantity of heat produced when 80.0g of O₂ react is 1110 kJ.
Enthalpy of a chemical reactionThe enthalpy of a chemical reaction as the heat absorbed or released in a chemical reaction when it occurs at constant pressure.
The enthalpy is an extensive property, that is, it depends on the amount of matter present.
Heat produced im this caseIn this case, the balanced reaction is:
C₃H₈ (g) + 5 O₂ (g) → 3 CO₂ (g) + 4 H₂O(g) + 2220 kJ
This equation indicates that when 1 mole of C₃H₈ reacts with 5 moles of O₂, 2220 kJ of heat is produced.
If the molar mass of O₂ is 32 g/moles, the mass of O₂ that react is calculated as:
mass of O₂= 5 moles× 32 g/mole
mass of O₂= 160 grams
Then you can apply the following rule of three: if 160 grams of O₂ releases 2220 kJ of heat, 80 grams of O₂ releases how much heat?
heat= (80 grams of O₂ ×2220 kJ)÷ 160 grams of O₂
heat= 1110 kJ
Finally, the quantity of heat released is 1110 kJ.
Learn more about enthalpy of a chemical reaction:
brainly.com/question/19521752
#SPJ1
mcb 101 why is it important to allow a sterilized inoculating loop to cool before attempting to sample liquid culture?
It is important to allow the sterilized inoculating loop to cool the before attempting to sample liquid culture is to avoid the killing the microorganisms.
It is always important to cool the inoculating loop before obtaining the bacterial sample due to the high heat in the loop could kill the bacteria if they touch our loop. The Bacteria will might be the versatile in the nature, but they cannot be handle the 400 ° hot metal loop.
If we pick up the organism with the hot tool, the cells is to be killed. To the cool loop or the needle fast, place on section of the agar that will uninoculated and at least different from the area .
To learn more about inoculating loop here
https://brainly.com/question/30529542
#SPJ4
what does this difference imply about their ionization energies? match the words in the left column to the appropriate blanks in the sentences on the right. make certain each sentence is complete before submitting your answer.
1. A higher ionization energy implies that it takes more energy to remove an electron from an atom.
2. A lower ionization energy implies that it takes less energy to remove an electron from an atom.
What is ionization energy ?Ionization energy is the amount of energy required to remove an electron from an atom or molecule. It is a measure of the strength of an atom's or molecule's bond with its electrons. The ionization energy of an element is usually reported in electron volts (eV). Ionization energy is the energy required to remove the most loosely bound electron, the valence electron, from an isolated gaseous atom to form a cation. It is dependent on the atomic number, and increases across the periodic table. It is also affected by the nuclear charge and the number of electrons in the atom.
Left Column: Higher, Lower
Higher ionization energies indicate that the atom is more strongly attracted to its electrons, making it harder to remove an electron. Lower ionization energies indicate that the atom is less strongly attracted to its electrons, making it easier to remove an electron.
To learn more about ionization energy
https://brainly.com/question/20658080
#SPJ4
If the caffeine concentration in a particular brand of soda is 3.91 mg/oz, drinking how many cans of soda would be lethal?
Assume that 10.0 g of caffeine is a lethal dose, and there are 12 oz in a can.
Based on its caffeine concentration, the number of soda cans that would be lethal for the person drinking the soda is 131 cans of soda.
What is caffeine toxicity?Caffeine toxicity produces symptoms such as:
Headache, dizziness, anxiety, agitation, trembling, tingling in the perioral region and in the extremities, disorientation, psychosis, and seizures are all symptoms of the central nervous system (CNS).
The mass of caffeine in a drinking can of soda is 3.91 mg/oz * 12 = 46.92
The number of cans of soda that will contain 10.0 g of caffeine is calculated as follows:
10.0 g of caffeine = 10 * 1000 mg
10.0 g of caffeine = 10000 mg
The number of cans that will be lethal = 10000 / 46.92
The number of cans that will be lethal = 213 cans of soda
Learn more about toxicity at:
https://brainly.com/question/28441394
#SPJ1
An energy bill indicates that the customer used 1373 kWh in July. 1kWh=3. 60×106J.
How many joules did the customer use?
The customer used 4,932,190,000 joules in July. This can be calculated by multiplying 1kWh (3.60 x 10^6 J) by the number of kWh used (1373 kWh), which equals 4,932,190,000 J.
The amount of energy that is consumed is determined by the amount of electricity used. 1 kilowatt hour (kWh) is equal to 3.6 megajoules (MJ) of energy. This means that for every kWh consumed, 3.6 MJ of energy is used. This energy can be used to power a variety of appliances and devices, from lights to air conditioners and more. The amount of energy that is consumed is also affected by the efficiency of the appliances and devices being used.
Learn more about The electricity bill :
https://brainly.com/question/14277272
#SPJ4
How many moles of copper are in 8 x 10^24 atoms of copper?
13.2 moles of copper are in 8 x 10^24 atoms of copper.
What does Avogadro's number mean?
We may determine the number of particles in 1 mole (or mol) of a substance using Avogadro's number. These particles can be atoms, molecules, or electrons. Avogadro's number is equivalent to around 6.022140857*10^23 mol1. Depending on the substance and the nature of the reaction, the units could be electrons, atoms, ions, or molecules.
The ratio of a substance's given mass in a chemical reaction to the mass of one mole of that material is the number of moles of that substance. A mole of any substance is equal to 6.023 *10^23, or Avogadro's number. Additionally, it is employed to express concentration measurements like mole per litre and molecular weight.
No of moles of copper will be 8*10^24 / 6.023*10^23
i.e. 13.2 moles of copper
To learn more about number of moles use link below:
https://brainly.com/question/30310637
#SPJ1