5.4 mole of gas are in the sample. 57472.01 L volume of carbon dioxide is produced at 12.0 ∘C and 0.995 atm.
What is an ideal gas equation ?The ideal gas equation is represented as: PV = nRT. In this equation, P refers to the pressure of the ideal gas, V is the volume of the ideal gas, n is the total amount of ideal gas that is measured in terms of moles, R is the universal gas constant, and T is the temperature.
1. According to the ideal gas laws, we know,
PV = nRT,
where, P = Pressure, V= Volume, T= Temperature in K, R = universal gas constant = 0.082 lit-atm/K/mol
Now,
T= 23.45°C = (273+23.45) K = 296.45 K
P = 3.93 atm and V = 33.57 L
By substituting these values, we get,
n = 3.93 × 33.57 / 0.082 × 296.45
= 131.93 / 24.3
= 5.4 mole
2. Given:
Moles of octane = 297 moles
According to the given reaction:-
2 moles of octane on reaction produces 16 moles of carbon dioxide
1 mole of octane on reaction produces 16/2 moles of carbon dioxide
297 moles of octane on reaction produces 8*297 moles of carbon dioxide
Moles of carbon dioxide = 2376 moles
Pressure = 0.995 atm
Temperature = 20.0 °C
The conversion of T( °C) to T(K) is shown below:
T(K) = T( °C) + 273.15
T₁ = (20.0 + 273.15) K
= 293.15 K
By ideal gas equation as:
PV=nRT
0.995 atm × V = 2376 mol × 0.0821 L.atm/K.mol × 293.15 K
V = 57472.01 L
Thus, 5.4 mole of gas are in the sample. 57472.01 L volume of carbon dioxide is produced at 12.0 ∘C and 0.995 atm.
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Which of the following statements is (are) true?
Check all that apply.
- Substitutional alloys tend to be more ductile than interstitial alloys.
- Nonmetallic elements are never found in alloys.
- Interstitial alloys tend to form between elements with similar ionic radii.
The following statements is (are) true is substituted alloys tend to be more ductile than interstitial alloys.
Alloy material is a type of material made from a combination of two or more types of substances used for the manufacture of vehicles. Alloys are made by mixing certain materials which will later cool down and harden so that they become an alloy metal. The structure of the alloy consists of two alloys, namely substitutional and interstitial alloys.
Substitution alloys are atoms of alloying substances that are used to replace the main metal of which they are composed. This alloy is formed from non-metallic atoms and is an alloying agent with almost the same size making it more ductile than interstitial alloys. While the interstitial alloy is a substance formed from fewer atoms compared to the main metal. The atoms slip between the constituent metals, for example steel.
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The label on a concentrated drug solution indicates that it contains 85 mg of medication in 5 mL. If the patient is to receive 225 mg of medication, how much of the
solution should be given?
mL of concentrated drug solution should be given.
(Round to the nearest tenth as needed.)
A
45 mL of concentrated drug solution should be given to the patient to provide them with the required 225 mg of medication.
What is Concerntrated?Concentrated is a term used to refer to a substance that has had most of its components removed, leaving only the most essential or desirable parts remaining. This can be done through evaporation, filtration, distillation, or other methods. Concentration can be used to create a more powerful or intense form of a substance, such as a concentrated solution of a chemical or a concentrated form of medicine. Concentration can also be used to make a substance more concentrated, such as when water is evaporated from a juice to make a syrup.
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What product is formed when the compound is treated with LiAlH4 (followed by H2O)?
The product that is formed when a compound is treated with LiAlH4 (followed by H2O) depends on the structure of the compound.
LiAlH4 is a strong reducing agent, which means it can reduce functional groups containing carbonyl (C=O) and imine (C=N) groups to alcohols and amines, respectively. For example, if a ketone is treated with LiAlH4, the carbonyl group is reduced to an alcohol, producing a secondary or tertiary alcohol depending on the number of alkyl groups attached to the carbonyl carbon.
After the reaction with LiAlH4, the resulting alcohol is typically treated with water (H2O) to hydrolyze the intermediate species, regenerating the original functional group. This step helps to remove any unwanted side products and ensures the formation of a single product.
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If you have 0.0102 moles of CaCl2, how many moles of Na2CO3 are necessary to reach stoichiometric quantities. From that calculation, determine how many grams of Na2CO3 are necessary to reach stoichiometric quantities.
If you have 0.0102 moles of CaCl2, how many moles of Na2CO3 are necessary to reach stoichiometric quantities. 1.08g of Na₂CO₃ are necessary to reach stoichiometric quantities.
What is stoichiometry quantity ?The term stoichiometric quantity is defined as the amount of product or reactant specified by the coefficients in a balanced chemical equation.
The balanced chemical reaction is as follows:
CaCl₂ + Na₂CO₃ → 2NaCl + CaCO₃
1 mole of CaCl₂ reacts per mole of Na₂CO₃
For calculate how many moles of CaCl2•2H2O are present in 1.50 g.
To solve this question we must find the moles of CaCl2•2H2O using its molar mass (147.0146g/mol).
These moles = Moles CaCl₂ = Moles of Na₂CO₃ necessaries to reach stoichiometric quantities.
To find then the mass we must use molar mass of Na₂CO₃ (105.99g/mol):
Moles CaCl₂.2H₂O:
1.50g × (1mol / 147.0146g)
= 0.0102 moles CaCl₂.2H₂O
= 0.0102moles CaCl₂
Moles Na₂CO₃:
0.0102 moles Na₂CO₃
Mass Na₂CO₃:
0.0102 moles × (105.99g / mol)
= 1.08g of Na₂CO₃ are present
Thus, 1.08g of Na₂CO₃ are necessary to reach stoichiometric quantities.
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if the extracellular concentration of sodium is 25 mm, then what is the pna*[na ]out for sodium? refer to the calculations worksheet for lab 2 for the equation and parameters to use for this calculation. round your answer to the nearest thousandths. do not round until you get your final number. do not enter units as part of your answer. enter only a numeric answer.
The Na-k ion exchange pump actively transports 3 intracellular sodium ions for 2 extracellular potassium ions.
Transmembrane proteins called ion exchange pumps and transporters allow ions to move freely across organic membranes in opposition to their concentration gradient. Ion pumps require constant power from ATP hydrolysis as long as exchangers make use of the energy allocated for one ion's aggregation slope.
The water contaminants from the abandoned ancient civilization are eliminated using the ion exchange synthetic method. These ions are replaced with better ones, which degrades the quality of your water. Because two combined orders can remove magnesium and calcium ions from the water, water softeners are quite similar to ion exchange systems. An significant cation in extracellular space is the sodium ion (Na+). Na+ can participate in a distracting intracellular second messenger that controls a variety of natural processes upon initial entry into the container.
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Which one of the following above is more soluble in water, ethanol (C2H5OH) or CHBr3
Ethanol (C₂H₅OH) is more soluble in water than chlorobromomethane (CHBr₃).
Solubility refers to the ability of a substance to dissolve in a solvent. When a substance dissolves in a solvent, the individual particles of the substance spread evenly throughout the solvent to form a homogeneous solution.
Ethanol is a polar molecule with a hydroxyl (-OH) functional group, which allows it to form hydrogen bonds with water molecules, making it highly soluble in water.
On the other hand, CHBr₃ is a non-polar molecule, and it is not as soluble in water due to the lack of hydrogen bonding between the molecule and water.
In general, polar substances tend to be more soluble in polar solvents like water, while non-polar substances are more soluble in non-polar solvents like ethanol.
The problem seems confusing, it must have been...
"Which one of the following is more soluble in water, ethanol (C₂H₅OH) or CHBr₃?"
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Hydrogen bonds account for which of the following observation?
01:05.
Hydrogen naturally exists as a diatomic molecule.
Hydrogen is easily combustible with oxygen. Spon
Water molecules are bent or "V-shaped".
Air is more dense than hydrogen gas.
For its molar mass, water has a high boiling point.
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A.
B.
C.
D.
E.
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E) Water's high boiling temperature and molar mass are accounted for by hydrogen bonding.
What three different intermolecular forces of attraction are there?The London dispersion force, the dipole-dipole interaction, and the ion-dipole interaction are the three main categories of intermolecular forces.
What do the forces of attraction between molecules mean?A force that attracts the protons or positive parts of one molecule to the electrons or negative parts of another molecule is known as an intermolecular force. A substance's various physical and chemical properties are influenced by this force.
The forces that attract opposing positive and negative charges when two interacting molecules come into contact are known as intermolecular forces of attraction, or IMFA. These include the London dispersion force, hydrogen bonding, dipole-dipole, and ion-dipole forces.
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Full Question = Hydrogen bonds account for which of the following observation? a) hydrogen naturally exists as a diatomic molecule b) it is easily combustible with oxygen c) water molecules are bent or "v-shaped" d) air is more dense than hydrogen bonds e) for its molar mass, water has a high boiling point
Answer:
E) Water's high boiling temperature and molar mass are accounted for by hydrogen bonding.
A homogenous mixture varies from a heterogenous mixture in that a homogenous mixture has properties that:A) do not vary in the mixtureB) vary in the mixtureC) suspend in a liquidD) dissolve a solute
A homogenous mixture varies from a heterogenous mixture in that a homogenous mixture has properties that do not vary in the mixture. The correct answer is A.
A homogeneous mixture is a mixture in which the properties and composition are uniform throughout the mixture. This means that if you took a sample from any part of the mixture, you would find the same properties and composition in that sample as you would find in the entire mixture.
In contrast, a heterogeneous mixture is a mixture in which the properties and composition vary throughout the mixture. For example, a salad is a heterogeneous mixture because you can see different ingredients such as lettuce, tomatoes, and croutons, each with different properties and composition.
So, in a homogeneous mixture, the properties do not vary, while in a heterogeneous mixture, the properties vary throughout the mixture.
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draw a structure for each of the isomers possible for c6h14. give the systematic name of each isomer you have drawn.
Compound with molecular formula [tex]C_{6} H_{12}[/tex] is hexane. It has 5 structural isomers i.e. n - hexane, 2 - methyl pentane, 3 - methyl pentane, 2,2-dimethylbutane, 2,3 - dimethylbutane.
Hexane is an organic compound with the molecular formula C6H14. It is a hydrocarbon composed of 6 carbon atoms linked together in a chain and 14 hydrogen atoms bonded to these carbon atoms. It is a colourless, flammable liquid with a boiling point of approx. 68°C and a density of 0.67 g/cm3.
The first isomer is n-hexane in which all carbon atoms in the chain are connected in a straight line and all hydrogen atoms are bonded to carbon atoms in the chain by paraffin wax.
The second isomer is 2-methylpentane, in which 1 methyl group is attached to the second carbon atom in the chain and all other hydrogens are paraffinically attached.
The third isomer is 3-methylpentane, in which a methyl group is attached to the third carbon atom of the chain and all other hydrogens are paraffinically attached.
The fourth isomer is 2,2-dimethylbutane, in which two methyl groups are attached to the second and third carbon atoms in the chain and all other hydrogens are paraffinic bonded.
The final isomer is 2,3-dimethylbutane, which has two methyl groups attached to the second and third carbon atoms in the chain and all other hydrogens attached to the paraffin.
Hexane is mainly used as solvent in the chemical industry and is also an important additive for gasoline and other fuels. It is also used as starting material in many organic syntheses.
Full question:
Draw a structure for each of the isomers possible for [tex]C_{6} H_{12}[/tex]. Give the systematic name of each isomer you have drawn. Name each one of them by the IUPAC system. Also indicate primary, secondary, tertiary and quaternary carbons in each of them.
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May you show your work on the Balancing Chemical Equations ^USA TESTPREP ....PLEASE!
Which of the following statements is correct with respect to the photosynthetic pathway of grass or a cactus?
A.
In a cactus, carbon is fixed only during the day.
B.
In grass, carbon is fixed only during the night.
C.
In a cactus, carbon is fixed only during the night.
Answer: A
Explanation:. In a cactus, carbon is fixed only during the day
Select the mechanism(s) where the concentration of the nucleophile has no effect on the reaction rate. SN1 SN2 E1 E2
The mechanisms where the concentration of the nucleophile has no effect on the reaction rate are SN1, SN2, E1, and E2.
SN1 and E1 reactions do not depend on the concentration of the nucleophile, as they use carbocations as intermediates. SN2 and E2 reactions are bimolecular processes, in which the nucleophile and substrate must collide in order for the reaction to occur, so the rate of the reaction depends on the concentration of both the nucleophile and the substrate.
The concentration of the nucleophile is a measure of the amount of nucleophile molecules in a given solution. In a nucleophilic substitution reaction, the nucleophile reacts with the substrate molecule (e.g. an alkyl halide) to form a new covalent bond.
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BF3(g)+NH3(g)→F3BNH3(g)
For the above reaction, the following data were measured:
Experiment [BF3] (M)
[NH3] (M)
Initial Rate (M/s)
1 0.250 0.250 0.2130
2 0.250 0.125 0.1065
3 0.200 0.100 0.0682
4 0.350 0.100 0.1193
5 0.175 0.100 0.0596
1. What is the value of the rate constant for the reaction?
2. What is the rate when [BF3]=0.160 and [NH3]=0.600?
1. The rate constant is 3.408 /M/s.
2. The rate is 0.324 M/s.
How can the rate constant and rate of the reaction be calculated?Let's say the reaction rate is
rate = k[BF3][x.NH3][y]
where,
In the reaction, BF3 and NH3 are in x and y's order.
When comparing experiments 1 and 2, the concentration of [BF3] is the same, canceling out both experiments, giving us
rate1/rate2 = 0.250/0.125 = (0.250/0.1065 = 0.2130/0.1065 y
assuming a log from both sides,
(1) = y log (2) (2)y = 1
Because of [NH3], the sequence of reaction is 1.
Taking experiments 4 and 5, the NH3 concentration is the same.
The order with respect to [BF3] is 1 because the initial rate of reaction doubles (from 0.0596 to 0.1193) as [BF3 concentration doubles from 0.175 M to 0.350 M.
The total rate is equal to 1 + 1 = 2.
Thus, the reaction rate will be.
rate = k
[BF3][NH3]
where k represents the rate constant.
rate = k
[BF3][NH3]
with k being the rate constant
take experiment 1,
k = 0.2130/(0.250 x 0.250) = 3.408 M-1.s-1
rate when [BF3] = 0.170 M and [NH3] = 0.560 M
rate = 3.408 x 0.170 x 0.560 = 0.324 M.s-1
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Label a data table so that the experimenter can record observations for the sand and water temperatures at various points.
the collum table 5 length x 3 width
science
Answer:
Explanation:
Here is a labeled data table for recording sand and water temperatures at various points:
Point Sand Temperature (°C) Water Temperature (°C)
1
2
3
4
5
The table is 5 columns wide and 3 rows long, with the first column labeled "Point" to indicate the location being observed, and the second and third columns labeled "Sand Temperature (°C)" and "Water Temperature (°C)" respectively to indicate the type of temperature being measured. The cells under the "Sand Temperature (°C)" and "Water Temperature (°C)" columns are left blank to allow the experimenter to record the corresponding temperature readings for each point.
Determine the total number of electrons present in the atom, molecule or ion below and enter it as a whole number for your answer. HF
The total number of electrons present in Mg2+ is 10. This is because magnesium (Mg) is a Group 2 element, so it has 2 valence electrons. When Mg is in the +2 oxidation state, it has lost those 2 valence electrons and therefore has a net charge of +2.
What is number of electrons present in the atom, molecule or ion?Atoms are the smallest unit of an element that exhibit that element's properties. They are made up of negatively charged electrons revolving around a central nucleus made up of more massive positively charged protons and electrically neutral neutrons. When certain substances emit energetic rays and particles, this is referred to as radioactivity. Particles (helium nuclei), particles (electron ions moving quickly), and rays are three significant categories of radiation.
Covalent and ionic chemical bonds, which are fundamentally different from one another and result in very different properties for different substances. Chemical bonds—attractive electrostatic interactions that hold atoms in chemical compounds together—are what keep them connected. The types and numbers of atoms present are indicated in the molecular formula of a covalent compound. Both polyatomic and diatomic molecules have more than two atoms.
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A piece of metal was heated and then
put it into 100.0 mL of water, initially at
23.7 °C. The metal and water were
allowed to come to an equilibrium
temperature, determined to be 27.8 °C.
How much energy did the water absorb?
CH₂0 = 4.18 j/g•C
qH₂0 = [?] J
The energy absorbed by the water is qH₂0 is 1690.8 J.
What is energy?Energy is the capacity to do work or produce heat. It can be found in many different forms, such as chemical, kinetic, gravitational, electrical, nuclear, and thermal energy. Chemical energy is stored in the bonds of atoms and molecules, which can be released through chemical reactions. Kinetic energy is the energy of motion, and is generated by moving objects.
The energy absorbed by the water can be calculated using the equation q = m * c * ∆T, where m is the mass of the water, c is the specific heat capacity of water, and ∆T is the change in temperature.
m = 100.0 mL * (1.00 g/mL) = 100.0 g
c = 4.18 j/g•C
∆T = 27.8 °C - 23.7 °C = 4.1 °C
Therefore, the energy absorbed by the water is qH₂0 = 100.0 g * 4.18 j/g•C * 4.1 °C = 1690.8 J.
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A bacterium such as Pseudomonas uses nitrate as a final electron acceptor in an electron transport system. All of the statements below are true, EXCEPT?
a. The process require an electron donor
b. The process produces nitrite ion
c. They can respire without O2
d. The process does not yield as much ATP
e. The require light
When pseudomonas uses nitrate as a final electron acceptor in anaerobic respiration. Here the statement which is wrong is they require light. Option e is the correct answer.
Pseudomonas can survive both in aerobic and anaerobic conditions as it is capable of both aerobic and anaerobic respiration. The process require an electron donor. Nitrate ion acts as the donor. Nitrite ions are produced during anaerobic respiration. Nitrate reductase convert nitrates to nitrites.
This process does not require oxygen because nitrate acts as the electron donor. This process yield less ATP compared to aerobic respiration.
So the statement which is not true is option e. They require light.
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True Or False : dentify the mass law that is demonstrated by the following observation: an old fashioned flashbulb contains magnesium and oxygen before use and magnesium oxide afterward, but the total mass of the bulb does not change.
The given statement is true about mass law that is demonstrated by observations.
This observation demonstrates the Law of Conservation of Mass, which states that in a chemical reaction, the total mass of the reactants is equal to the total mass of the products. This means that the total amount of matter in a closed system remains constant, and that the mass of substances can neither be created nor destroyed.
In the case of the flashbulb, the magnesium and oxygen react to form magnesium oxide, but the total mass of the bulb remains unchanged. This law is one of the fundamental principles of chemistry, and is widely used to explain the behavior of matter and energy in chemical reactions.
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Look at the picture below
As pressure increases then volume decreases and vice versa, because pressure and volume are inversely proportional to each other.
What do you mean by the Boyle's law ?Boyle's Law states that as the pressure on a gas increases, the volume of the gas decreases because the gas particles are forced closer put together. Oppositely, as the pressure of a gas decreases, the gas volume increases because the gas particles can away from each other.
According to the Boyle's law when you inhale, muscles increase the size of your thoracic that is chest cavity and expand your lungs.
Thus, As pressure increases then volume decreases and vice versa, because pressure and volume are inversely proportional to each other.
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Amniotic fluid protects the fetus by the following actions: (1) cushioning against impacts to the maternal abdomen, (2) maintaining a stable temperature, and
Amniotic fluid protects the fetus by the following actions:
cushioning against impacts to the maternal abdomen.maintaining a stable temperature.providing a protective barrier against infection.Amniotic fluid is essential for protecting the fetus and providing it with a safe and comfortable environment. It cushions the baby from outside impacts and helps to maintain a stable temperature. Additionally, amniotic fluid helps to protect the baby from infection by acting as a barrier against potentially harmful bacteria and other infectious agents. Finally, amniotic fluid also helps the baby's lungs to develop properly and helps with the development of the baby's skin and muscles.
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when setting up your experiment, choose... is added to the buret and choose... is pipetted into the erlenmeyer flask. one to two drops of choose... are added to the erlenmeyer flask along with additional water to bring the total volume to 50 ml before beginning the titration.
When setting up your experiment, sodium hydroxide is added to the buret and acetic acid is pipetted into the Erlenmeyer flask. one to two drops of phenolphthalein are added to the Erlenmeyer flask along with additional water to bring the total volume to 50 ml before beginning the titration.
Steps for conducting titration.
First of all pipette and burette should be rinsed 3 times with distilled water and then 3 times with the solution they will measure and transfer. Then after add suitable amount of indicator. This procedures should be consistent across all titrations; 3 drops is usual.
We must ensure that all glassware is properly cleaned and rinsed before beginning any analysis.
Erlenmeyer flasks are the flasks that are used to contain liquids and for mixing, heating, cooling, incubation, filtration, storage, and other liquid-handling processes. They have slanted sides and narrow necks which allow the contents to be mixed by swirling without the risk of spills, which is useful for titrations and for boiling liquids.
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Osmosis is the net movement of molecules or atoms from a region of high concentration to a region of low concentration as a result of random motion of the molecules or atoms.Options are true or false.
Correct. Osmosis is the net movement of molecules or atoms from a region of high concentration to a region of low concentration as a result of random motion of the molecules or atoms.
Osmosis is defined as the diffusion of water or other solvents through a semipermeable membrane. If a solution is separated from the pure solvent by a membrane that is permeable to the solvent but not the solute then the solution will tend to become more dilute by absorbing solvent through the membrane. The osmosis process can be stopped by increasing the pressure on the solution by a specific amount called the osmotic pressure. It is a spontaneous passage. It is a vital process in biological systems as biological membranes are semipermeable. The membranes are impermeable to large and polar molecules such as ions, proteins while being permeable to non-polar or hydrophobic molecules like oxygen, carbon dioxide.
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these are some events occurring at chemical synapses during paracrine signaling. place them in order:1. opening of ligandgated ion channels2. releasemof neurotransmitter by exocytosis3. opening of voltage gated calcium channels in presynaptic neuron4. binding of neurotransmitter to postsynaptic receptor5. action potential generation in presynaptic neuron
The order of events occurring at chemical synapses during paracrine signaling is as follows:
Action potential generation in presynaptic neuron.Opening of voltage gated calcium channels in presynaptic neuron.Release of neurotransmitter by exocytosis.Binding of neurotransmitter to postsynaptic receptor. Opening of ligand-gated ion channels.A chemical synopsis is an overview of a particular type of chemical reaction, such as a synthesis or a degradation. It describes the reactants, products, and any other relevant information about the reaction, such as the energy required for it to occur and any catalysts that can be used to speed it up.
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do both members of the following pairs have the same number of protons? neutrons? electrons? (a) 3 h 1 and 3 he 2 (b) 14 c 6 and 15 n 7
For ³₁H and ³₂He, Protons are NOT equal, Electrons are not equal, Neutrons are not equal and for ¹⁴₇N and ¹⁵₇N, Protons are Not equal, Electrons are Not equal, Neutrons are equal.
Atomic isotopes are frequently represented by the nuclear symbol. Isotopes are different versions of an element's atoms. In comparison to other atom types, isotopes contain a varied number of neutrons.
Three components make up the nuclear symbol: the element's symbol, the atomic number, and the mass number. The usual notation for an element's nuclear symbol is anX, where an is the element's mass number and n (or frequently z) is the atomic number.
The total number of protons and neutrons in the atom's nucleus is represented by the mass number, or a.
The quantity of protons in an atom's nucleus, or "atomic number," is known.The amount of neutrons in the isotope determines the difference between the mass number and the atomic number.
The hyphen notation is another symbol used to signify isotopes. The element's name, a hyphen, and the isotope's mass number are used in this notation. For instance, the isotope 126C can alternatively be written as carbon - 12 when employing the hyphen notation.
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How many atoms are in 3.25 moles of Na?
Answer:20
Explanation:
One mole of sodium contains 6.02 × 10²³ Na atoms. Therefore, 3.25 moles of sodium contains 1.95 × 10²⁴ Na atoms.
What is one mole ?One mole of a substance is its amount containing 6.02 × 10²³ atoms or molecules. This number is called Avogadro number. One mole of every elements contains Avogadro number of atoms.
Similarly one mole of every compound contains 6.02 × 10²³ molecules. Mass of one mole of an element is called its atomic mass. The mass of one mole of compound is called its molar mass.
No.of atoms in 3.25 moles of Na = 3.25 × 6.02 × 10²³ = 1.95 × 10²⁴
Hence, there will be 1.95 × 10²⁴ Na atoms in 3.25 moles of Na.
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solid iron iii oxide reacts with carbon monoxide gas to form solid iron and carbon dioxide gas.express your answer as a chemical equation identify all of the phases in your answer!
The balanced chemical equation will be
Fe₂O₃(s) + 3CO(g) ⇒ 2Fe(s) +3CO₂(g)
Chemical formulas and symbols called equations are used to symbolically represent chemical reactions.
A chemical equation consists of reactants, products, and an arrow pointing in the direction of the reaction. When there are the same number of atoms in each molecule on both sides of the equation, the chemical equation is said to be balanced.
Carbon monoxide gas and solid iron (iii) oxide react to produce solid iron and carbon dioxide gas.
Iron (iii) oxide = Fe₂O₃
Carbon monoxide =CO
Iron = Fe
Carbon dioxide =CO₂
The given statement is
Fe₂O₃(s) + CO(g) ⇒ Fe(s) +CO₂(g)
Here, on LHS & on RHS we have the following:
Fe= 2 → 1
C =1 → 1
0 = 4→ 2
The reaction is unbalanced; so, we will balance the chemical equation
Fe₂O₃(s) + 3CO(g) ⇒ 2Fe(s) +3CO₂(g)
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12. If a gas canister contains 1.45 L of fuel, and the fuel density is 0.710 g/cm³. What is the mass of the fuel contained in the gas canister? (1cm³ = 1mL)
The number of kilograms of fuel that are contained in one canister is 1.03 Kilograms
Given:
mass = density x volume
Density= 0.710 g/cm³
volume = 1.45 L
To ensure consistency, convert 1.45 l into cm³
1.45 L= 1450 cm³
mass = 0.710g/cm³ x 1450 cm³ = 1029.5 grams
convert grams to Kg
(1 kg x 1029.5 grams) /1000 grams = 1.0295 Kg ≅1.03 kg
What is mass volume density?
A material substance's mass per cubic centimetre. D is density, M is mass, and V is volume, and the formula for density is d = M/V. In terms of grammes per cubic centimetre, density is frequently expressed.
Definition of density
It is a material substance's mass expressed as a percentage of its volume. Additionally, density is expressed in terms of kilograms per cubic metres of space. One kilogram per cubic metre is the density of air, for instance.
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For the following reaction, 26.0 grams of diphosphorus pentoxide are allowed to react with 14.6 grams of water.
What is the maximum mass of phosphoric acid that can be formed?
Mass = g
What is the FORMULA for the limiting reactant?
What mass of the excess reagent remains after the reaction is complete?
Mass = g
According to the stoichiometry of the reaction, 4 moles of H3PO4 are formed from 1 mole of P4O10. Therefore, the number of moles of H3PO4 produced from 0.0916 moles of P4O10 is
mol H3PO4 = 4 x mol P4O10
moles H3PO4 = 4 x 0.0916 moles
Moles of H3PO4 = 0.3664 moles
Finally, the mass of H3PO4 produced can be calculated from its molar mass.
mass of H3PO4 = moles of H3PO4 x molar mass of H3PO4
Mass H3PO4 = 0.3664 mol x 98.0 g/mol
Mass of H3PO4 = 35.92 g
Therefore, the maximum mass of phosphoric acid that can be produced from 26.0 g P4O10 and 14.6 g H2O is 35.9 g H3PO4.
What is stoichiometry in chemistry?
Stoichiometry, in chemistry, the determination of the proportions in which elements or compounds react with each other. The rules followed in determining stoichiometric ratios are based on the law of conservation of mass and energy and the law of combining weight or volume.
Why is it called stoichiometric?
Stoichiometry is the study of quantitative or measurable relationships that exist in chemical formulas and chemical reactions. The term is derived from the Greek stoikeion for element and metron for measurement.
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When taking a measurement with a pH meter, keep the instrument in the storage solution until it is needed. Rinse the pH meter with deionized water and gently pat dry. Place the meter in the sample solution, and record the measurement when the pH stabilizes.
The ph meter should be settled down, after that only it can able analyse it.
What is ph ?
A determination of how acidic or basic a substance or solution is. Calculating pH involves using a scale from 0 to 14. On this scale, a pH of 7 indicates neutrality, which means it is neither acidic nor basic. More acidic chemicals have pH values below 7, while more basic substances have pH values above 7.
What is temperature ?
Temperature is a unit used to represent how hot or cold something is. It can be stated using the Celsius or Fahrenheit scales, among others. Temperature shows which way heat energy will naturally flow, i.e., from a hotter (body with a higher temperature) to a colder (body with a lower temperature) (one at a lower temperature).
Therefore, ph meter should be settled down, after that only it can able analyse it.
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Gaseous ammonia chemically reacts with oxygen (O₂) gas to produce nitrogen monoxide gas and water vapor. Calculate the moles of water produced by the
reaction of 0.095 mol of oxygen. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits
Answer:
The balanced chemical equation for the reaction between gaseous ammonia and oxygen gas is:
4NH3 + 5O2 -> 4NO + 6H2O
From this equation, we can see that for every 4 moles of ammonia, 6 moles of water are produced. Thus, with 0.095 moles of oxygen, we can calculate the number of moles of water produced using the stoichiometric ratio of the reactants:
0.095 moles of O2 x (6 moles H2O/5 moles O2) = 0.114 moles H2O
Therefore, 0.114 moles of water are produced by the reaction of 0.095 moles of oxygen.