5.40 × [tex]10^{24}[/tex] molecules of [tex]H_{2}O[/tex] can be produced from 0.996 mol of [tex]C_{8}H_{18}[/tex].
The balanced chemical equation for the complete combustion of [tex]C_{8}H_{18}[/tex] is: [tex]C_{8}H_{18}[/tex] + 12.5[tex]O_{2}[/tex] → [tex]8CO_{2}[/tex] + 9[tex]H_{2}O[/tex]
From the equation, 9 moles of [tex]H_{2}O[/tex] are produced for every mole of [tex]C_{8}H_{18}[/tex] combusted. Thus, we can calculate the number of moles of [tex]H_{2}O[/tex] that can be produced from 0.996 mol of [tex]C_{8}H_{18}[/tex]: 0.996 mol [tex]C_{8}H_{18}[/tex] × (9 mol [tex]H_{2}O[/tex] / 1 mol [tex]C_{8}H_{18}[/tex]) = 8.964 mol [tex]H_{2}O[/tex]
Therefore, 8.964 moles of [tex]H_{2}O[/tex] can be produced from 0.996 mol of [tex]C_{8}H_{18}[/tex]. To convert moles to molecules, we use Avogadro's number: 8.964 mol [tex]H_{2}O[/tex] × 6.022 × [tex]10^{23}[/tex] molecules/mol = 5.40 × [tex]10^{24}[/tex] molecules of [tex]H_{2}O[/tex]
Therefore, 5.40 × [tex]10^{24}[/tex] molecules of [tex]H_{2}O[/tex] can be produced from 0.996 mol of [tex]C_{8}H_{18}[/tex].
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Part 1. A chemist reacted 12.0 liters of F2 gas with NaCl in the laboratory to form Cl2 gas and NaF. Use the ideal gas law equation to determine the mass of NaCl that reacted with F2 at 280. K and 1.50 atm.
F2 + 2NaCl → Cl2 + 2NaF
Part 2. Explain how you would determine the mass of sodium chloride that can react with the same volume of fluorine gas at STP.
The mass of NaCl that reacted with 12 lit of F2 at 280 K and 1.50 atm= 0.027 gm.
the mass of sodium chloride that can react with the same volume of fluorine gas at STP = 0.01 gm.
Given,
F2 + 2NaCl → Cl2 + 2NaF
PART-1:
So, from the given reaction we can say that 2 moles of NaCl is required for 1 mole of F2.
By using combined gas law,
[tex]\frac{P1V1}{n1T1} =\frac{P2V2}{n2T2}[/tex]
here , P1 =P2
and moles of NaCl is twice as pf F2
∴n2=2n1
and also T1 = T2
by simplifying the reaction we get..
[tex]\frac{V1}{n1} = \frac{V2}{2n1}[/tex]
V2= 2 × V1
∴V2 = 2 ×12
= 24 Lit.
from ideal gas law ,
we can find the moles of NaCl,
PV= nRT
n=[tex]\frac{PV}{RT}[/tex]
n= 1.5 × 24 ÷( 0.082 × 280)
∴ n= 1.57
mole = mass / molecular mass
so, molecular mass of NaCl = 58.5
∴ mass of NaCl used = 1.57/58.5
= 0.027 gm
PART -2:
At, STP
T= 273 K
P = 1atm
V= 12 lit
n= ?
using ideal gas law we can determine the number of moles
PV= nRT
n = 1 ×12 ÷(0.082 × 273)
n= 0. 54
∴ mass of NaCl = 0.54 / 58.5
= 0.01 g
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Answer: for part 1: our equation is F2 + 2NaCI -> CI2 + 2NaF. We can solve this by using the gas law(s). The ideal gas law is PV = nRT. P = pressure V = volume n = amount of substance R = ideal gas constant and T = temperature. We know that 2 moles of NaCI is crucial for 1 mole of F2. P1=P2 and T1=T2. we multiply the 12 liters by 2. which is 24 liters. We know NaCI consists 58.44/58.5g per mole. if we divide that by n of (nRT) we find the mass. we mutiply 24 by 1.5. which is 36 the divide by 0.082 which was multiplied by 280. and u get 1.567 or 1.57. we divide that by the g of NaCI. u get 0.027.
for part 2: we STP stands for Standard Temperature and Pressure. we can also use the ideal gas law. PV = nRT. Using this knowledge we can determine the mass. T is 273k and p is 1 atm. v is 12. we multiply 0.082 and 273. 22.386. we divid that by 12. we get 0.54. then we divide the 0.54 by the g again. which is 0.01g.
Explanation:
The labels required by the Department of Transportation (DOT) must be placed on ________ when chemicals are being shipped. These labels may look similar to GHS pictograms and categorize hazardous chemicals into ________ different categories. The labels required by the Department of Transportation (DOT) must be placed on ________ when chemicals are being shipped. These labels may look similar to GHS pictograms and categorize hazardous chemicals into ________ different categories.
The labels required by the Department of Transportation (DOT) must be placed on outside containers when chemicals are being shipped.
These labels may look similar to GHS pictograms and categorize hazardous chemicals into nine different categories.
OSHA recently revised the Hazard Communication Standard, and as part of that modification, new standards for labeling dangerous chemicals were established.
As a result, workers will have better information available on the safe handling and use of hazardous chemicals, thereby allowing them to avoid injuries and illnesses related to exposures to hazardous chemicals.
These modifications will aid in ensuring higher standards and uniformity in the categorization and labeling of all substances.
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A coupled reaction is a pair of reactions occurring together in which the energy released by one reaction is used in bond formation in the second reaction. For example, glycolysis and pyruvate processing form a coupled reaction. Explain how coupling reactions allows a cell to capture the free energy of glucose oxidation rath
A coupled reaction is a pair of reactions occurring together in which the energy released by one reaction is used in bond formation in the second reaction. For example, glycolysis and pyruvate processing form a coupled reaction.
Chemical reactions that involve a common intermediate and the transfer of energy from one side to the other are referred to as coupled reactions. An illustration is the endergonic process of ATP synthesis, which is connected to proton gradient dissipation.
High-energy phosphate bonds are broken during the hydrolysis of an ATP molecule, which releases a lot of energy into the exergonic form. The coupled reaction is crucial in the transformation of this energy into an endergonic state. Coupled reactions are those that occur when two separate reactions are driven by the free energy released during the first reaction.
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Why is the practice of using a spatula to scoop powder from a bottle discouraged?
Answer:
it's both impossible and inefficient
Explanation:
think about it, if your spatula can even fit in the bottle will it take out a measured amount of powder? if the spatula has holes in it the powder will fall out and you will have to restart the experiment
How many moles of electrons are transferred when the two half-reactions shown below are combined to generate the spontaneous balanced chemical reaction with the lowest possible integer coefficients
6 moles of e- are transferred when the two half-reactions shown below are combined to generate the spontaneous reaction with the lowest possible integer coefficients
A spontaneous reaction is one that favors the creation of products under the reaction's current conditions. A bonfire that is raging and exothermic is an illustration of a spontaneous reaction (there is a decrease in the energy of the system as energy is released to the surroundings as heat)
A redox reaction's oxidation or reduction reaction component is known as a half-reaction (or half-cell reaction). By taking into account the shift in oxidation states of the many chemicals participating in the redox reaction, a half-reaction is obtained. At each electrode, there are two chemical reactions taking on in the cell. Half-reactions are what we refer to as. An oxidation reaction that releases electrons occurs at the anode.
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Positron emission tomography (pet) imaging relies upon the emission of __________ from radioactive isotopes such as carbon-11.
Answer:
positron
Explanation:
PET scanning works by injecting a radioactive material, called a tracer, into the body. The tracer emits a positron inside the body, and the positron collides with electrons in the body, thereby annihilating and releasing two gamma rays that travel in opposite directions.
The population that experienced the highest radioactivity from chernobyl in norway were:______
The population that experienced the highest radioactivity from chernobyl in norway were "a small community of reindeer herders called the Saami".
Typically, the term "population" denotes the total quantity of people living in a particular area, be it a city or town, region, country, continent, or even the entire world.
The native reindeer herders of Scandinavia could be known as the Sámi. These breathtaking images capture a herd during its yearly journey through summer pastures as well as wintering areas.
Therefore, the population that experienced the highest radioactivity from chernobyl in norway were "a small community of reindeer herders called the Saami".
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How many sulfur dioxide molecules are in 2.8 moles of sulfur dioxide?
Answer:
1,69 x10²⁴
Explanation:
Answered it in the comments! ^^
what are the differences between the double displacement reaction and the displacement reaction ? explain with a chemical equations
In a displacement reaction, a more reactive element replaces a less reactive element from a compound. In a double displacement reaction, two atoms or a group of atoms switch places to form new compounds.
Explaination:
Displacement chemical reaction :
A displacement reaction is the one wherein the atom or a set of atoms is displaced by another atom in a molecule. For instance, when iron is added to a copper sulphate solution, it displaces the copper metal.
Fe + CuSO4 → FeSO4 + Cu. When zinc is added to a copper sulphate solution, it displaces the copper metal. ...
Zn + CuSO4 → ZnSO4 + Cu.
etc.
Double Displacement Chemical Reaction :
Double displacement reactions take place mostly in aqueous solutions wherein the ions precipitate and exchange of ions takes place. For example, when a solution of barium chloride is mixed with sodium sulphate, a white precipitate of barium sulphate is formed rapidly. These reactions are ionic in nature.
Here are some examples of double displacement reaction: AgNO 3 + NaCl → AgCl + NaNO.
2NaCl + CaSO4 → Na2SO4+ CaCl.
H2SO4 + 2LiOH ⇌ Li2SO4 + 2H2O.
Which image best represents a solution of distilled water at pH = 7?
Answer:
nuetral
Explanation:
water has neutral
John has been feeling ill all day. He arrives home from work and takes his temperature. Unfortunately, the thermometer shows his temperature in Celsius, and he can’t get it to change. It reads 40 degrees Celsius. What is his temperature in Fahrenheit?
Answer:
[tex]40 \times 1.8 + 32 = 104[/tex]Explanation:
The best way to change Celsius to Fahrenheit is to times it by 1.8 then plus 32
In a closed container, nitrogen gas and hydrogen gas react to produce ammonia.
N2(g) + 3H₂(g)2NH3(g)
Which statement describes the graph of concentration versus time for ammonia as the system approaches dynamic equilibrium?
It curves down and levels out.
It curves up and levels out.
It steadily decreases to zero.
It steadily increases to a maximum.
[tex]\frac{1}{2} N_{2} (g)+\frac{3}{2} H_{2} (g)[/tex]⇌[tex]NH_{3} (g)[/tex]
It curves up and levels out.
What type of reaction are nitrogen and hydrogen form ammonia?Three hydrogen atoms and one nitrogen atom combine to form ammonia. It has a tetrahedral structure. Ammonia is a fertilizer and a cleaning agent and is used in the manufacturing of nitric acid. NH3 is typically found as a gas and is corrosive and dangerous when inhaled over time.Chemical equations express chemical reactions in the form of chemical formulas with an arrow pointing from reactant to product. A balanced chemical equation has the same amount of atoms of each element on both sides of the equation.Here, the balancing of a chemical equation is governed by the law of conservation of mass.The chemical reaction is Nitrogen gas and hydrogen gas mixed to generate ammonia.The statement describes the graph of concentration versus time for ammonia as the system approaches dynamic equilibrium: It curves up and levels out.
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As the system approches to dynamic equilibrium
It curves up and levels out.
What is Haber's Process?
Haber's process is used to produce Ammonia in industries.
In Haber's process , the Nitrogen reacts with Hydrogen and product formed is Ammonia.
N2+3H²→2NH3
The reactants which are used in this Process are :
1)Iron is used as catalyst
2) Air which supplies the nitrogen
3) Pressure is 200atm
4) Temperature used is 400-45°C .
Ammonia is used for :
*Agriculture uses as Fertilizer
* In Refrigeration
* Used in production of medicine
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The isotope 226Ra has a half-life for radioactive decay of 1600 Y. How long will it take the amount of 226 Ra in a sample of 226RaCl2 to decrease by 25%
Give the coordination number and the charge of the central metal ion in each coordination compound: For the charges, enter your answers with the correct sign. e.g. if you think the answer is 1, enter the positive sign followed by the number 1. Na2[Zn(OH)4] coordination number
The coordination number shows the number of ligands attached to the central metal.
What is complex in coordination compound?A coordination complex is the product of a Lewis acid-base reaction in which neutral molecules or anions (called ligands) bond to a central metal atom (or ion) by coordinate covalent bonds. Ligands are Lewis bases - they contain at least one pair of electrons to donate to a metal atom/ion.A complex is a coordination compound which contains a central metal atom or ion. The coordination number refers to the number of ligands in the complex. The coordination number usually influences the geometry of the complex compound.The coordination number and the charge on the central metal in each of the complexes are shown below;
Na2[Zn(OH)4] - The coordination number of the complex is 4 and the charge on the central metal ion is +2.
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The relationship between the providers and the customer, where the providers keep the promises made to the customer, is also known as:_______.
The relationship between the providers and the customer, where the providers keep the promises made to the customer, is also known as a service-level agreement.
A service-level agreement (SLA) outlines the degree of service that a client expects from a supplier, the metrics used to measure that performance, and any penalties that may be imposed if the agreed-upon service standards are not fulfilled.
A service level agreement (SLA) is a straightforward contract between a service provider and their client (internal or external), outlining the services to be provided, the level of responsiveness to be anticipated, and the performance metrics to be used.
A Service Level Agreement (SLA) has been adopted by the Information Technology Department to direct its project management. Our SLA's objectives are. to enhance management effectiveness
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Calculate the molecular weight of Na2sio3
Answer:
Answer:122 g/ mol
Answer:122 g/ molExplanation:
Answer:122 g/ molExplanation:first must find the molar mass of each element in the compound
Answer:122 g/ molExplanation:first must find the molar mass of each element in the compoundNa= 23×2 =46 g/mol
Answer:122 g/ molExplanation:first must find the molar mass of each element in the compoundNa= 23×2 =46 g/molSi= 28 g/mol
Answer:122 g/ molExplanation:first must find the molar mass of each element in the compoundNa= 23×2 =46 g/molSi= 28 g/molO= 16× 3 = 48 g/ mol
Answer:122 g/ molExplanation:first must find the molar mass of each element in the compoundNa= 23×2 =46 g/molSi= 28 g/molO= 16× 3 = 48 g/ molhence , summation of the molar masses
Answer:122 g/ molExplanation:first must find the molar mass of each element in the compoundNa= 23×2 =46 g/molSi= 28 g/molO= 16× 3 = 48 g/ molhence , summation of the molar masses46+28+48 = 122g/mol
The molecular weight of [tex]\rm Na_2SiO_3[/tex] (sodium silicate) is approximately 122.07 g/mol.
To calculate the molecular weight of [tex]\rm Na_2SiO_3[/tex] (sodium silicate), we need to add the atomic weights of each individual element in the compound.
The atomic weights are as follows:
- Sodium (Na) = 22.99 g/mol
- Silicon (Si) = 28.09 g/mol
- Oxygen (O) = 16.00 g/mol
Now, multiply the atomic weights by the number of atoms in the compound:
- Sodium (Na) = 2 atoms * 22.99 g/mol = 45.98 g/mol
- Silicon (Si) = 1 atom * 28.09 g/mol = 28.09 g/mol
- Oxygen (O) = 3 atoms * 16.00 g/mol = 48.00 g/mol
Finally, add up all the atomic weights:
[tex]\rm \[Molecular \, weight \, of \, Na2SiO3 = 45.98 g/mol + 28.09 g/mol + 48.00 g/mol \\= 122.07 g/mol\][/tex]
So, the molecular weight of [tex]\rm Na_2SiO_3[/tex] (sodium silicate) is approximately 122.07 g/mol.
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PLEASE HURRY AND HELP
Write the empirical formula for at least four ionic compounds that could be formed from the following ions:
Fe²+, CH₂CO₂, Pb4+, MnO-4
Answer:
Fe(CH₂CO₂)₂, Fe₂MnO, Pb(CH₂CO₂)₄, PbMnO
Explanation:
Cations (positively charged ions) can only form ionic bonds with anions (negatively charged ions). However, you can't just simply put one cation and one anion together to form a compound. Each compound needs to been neutral, or have an overall charge of 0. When cations and anions do not have charges that perfectly cancel, you need to modify the amount of each ion in the compound.
1.) Fe(CH₂CO₂)₂
----> Fe²⁺ and 2 CH₂CO₂⁻
----> +2 + (-1) + (-1) = 0
2.) Fe₂MnO
----> 2 Fe²⁺ and 1 MnO⁴⁻
----> 2(+2) + (-4) = 0
3.) Pb(CH₂CO₂)₄
----> 1 Pb⁴⁺ and 4 CH₂CO₂⁻
----> +4 + (-1) + (-1) + (-1) + (-1) = 0
4.) PbMnO
----> 1 Pb⁴⁺ and 1 MnO⁴⁻
----> +4 + (-4) = 0
Suppose you prepare 500 ml of a 0.10 Msolution of some salt and then spill some of it. What happens to the concentration of the solution left in the container
The concentration of the solution left in the container will remain same.
What is concentration?The quantity of a chemical in a mixture is expressed by the substance's concentration. Concentration can be expressed in numerous ways. Chemists refer to the substance as a solute, and the substance that contains the solvent dissolves the solute is referred to as a solution.
Importance of concentration -
Because it controls how frequently particles collide in solution and, in turn, indirectly determines the speeds of reaction and the circumstances at equilibrium, the concentration of a solvent is crucial for understanding chemical reactions.The amount of a solute present in a specific quantity of a solvent or solution is known as the concentration of the solution. In chemistry. Determining the stoichiometry of reagents for solution reactions requires knowledge of the solute concentration.The calculation of concentration is done by various methods; some are given below,
Molarity (M) - moles of solute/liters of solution.Mass Concentration (kg/m³ or g/L) - mass of solute/volume of solutionNormality (N) - grams active solute/liters of solutionMolality (m) - moles of solute/mass of solvent (not mass of solution!)Mass Percent (%) - mass solute/mass solution x 100% (mass unit is same for both solute and solution)Volume Concentration (no unit) - volume of solute/volume of mixture (same units of volume for each)To know more about concentration of a solution, here
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Which statements describe some of the original ideas proposed about the universe during the big bang? Check all that apply.
The statements which describe some of the original ideas proposed about the universe during the big bang include:
The universe was opaque. The universe was very dense and hot. The universe expanded from a single point. What is Big bang theory?This theory describes how the universe expanded from a single point to form the earth we are living in.
it states that the very dense and hot environment led to it thereby making it the most appropriate choice.
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How many moles of helium are in a
45.0 liter tank at 293 K and 15.0 atm?
Answer:
28.1 moles (three sig digits)
Explanation:
Using Ideal Gas Law
PV = n RT looking for 'n' R = .082057366 L-atm/K-mole
15.0 * 45.0 = n * .082057366 * 293
n = 28.1 Moles
The number of moles of helium that are in a 45.0-liter tank at 293 K and 15.0 atm is 28.1 Moles.
What are moles?Moles is the measuring unit that measures the quantity of a substance. Moles is a SI unit.
Helium is the lightest gas, which is used in the tires of an airplane if it is filled in the balloons, the balloon flies in the sky.
Given the volume is 45.0 liter
The pressure is 15.0 atm.
The temperature is 293 K
To calculate the moles, we will use the formula of an ideal gas:
PV = n RT
R = .082057366 is the gas constant.
We have to calculate the n
Putting the values in the equation
15.0 x 45.0 = n x .082057366 x 293
n = 28.1 Moles.
Thus, the moles of helium is n = 28.1 Moles.
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Help!!
Classify each diagram as an element a compound or mixture
Answer:
1. Mixture
2. Compound
3. Compound
4. Element
Explanation:
Number 1 shows two completely different types of compounds in the same space, so it is a mixture.
Numbers 2 and 3 are compounds because there aren't different types compounds as in Number 1, but the same compound repeated. 2 is a compound because while all of the circles are the same element, they are connected. O2 for example, oxygen, is a compound.
Number 4, finally, is all of the same substance, non-connected, so it shows an element.
Brainliest, please :) (Trying to become a genius so that I can continue helping more people)
The correctly reported volume for a rectangular solid that is found to be
12.49 cm x 4.00 cm x 0.90 cm is
cm³?
Are isotopes similar to ions, yes or no?
Answer:
Yes
Explanation:
Isotopes are atoms of the same element that have different numbers of neutrons in their nuclei. Everything else about them is the same.(If you want more explanation tell me).
Which of the following is the correct balanced equation for the dissociation of calcium chloride (CaC*l_{2}) in water (H_{2}*O)?
D. CaC*l_{2}(s) * HLO\\ Ca^ 2+ (aa)+2Cl^ - (aq)
C. 2CaC*l_{2} * (s) ^ (H * 0)\\ Ca^ 3+ (aq)+2Cl^ - (a
A. 2CaC*l_{2} * (s) ^ (H / 0)\\ 2Ca^ 3+ (aq)+Cl^ - (aq)
B. CaC*l_{2}(s) * H_{2}*O,Ca^ 2+ (aq)+Cl^ - (aq)
The correct balanced equation for the dissociation of calcium chloride is [tex]CaCl_2 (s) --- > Ca^{2+} (aq) + 2Cl^- (aq)[/tex]. Option D.
What is dissociation?Dissociation in chemistry refers to the process whereby a compound reversibly breaks down to its constituent elements (usually in ion forms) within a solution.
The constituent elements in calcium chloride are calcium and chlorine. Calcium ion is written as [tex]Ca^2^+[/tex] while chlorine ion is written as [tex]Cl^-[/tex]. Calcium chloride itself is written as [tex]CaCl_2[/tex].
Thus, the equation of dissociation of calcium chloride in water can be summarized as:
[tex]CaCl_2 (s) --- > Ca^{2+} (aq) + 2Cl^- (aq)[/tex]
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What titrant will be used to titrate the 0. 02 m hcl phenol red solution?
The NaOH will be used What titrant to titrate the 0. 02 m hcl phenol red solution.
Acid-base titrations may be the most typical titrations, although there are numerous more forms as well. Take a look at this illustration where sodium hydroxide is used to titrate a sample of hydrochloric acid (HCl) (NaOH). The titrant (NaOH), which is added gradually throughout the duration of the titration, has been added to the unknown solution.
Titrants are solutions with known concentrations that are added to solutions whose concentrations must be determined. The solution for whom the concentration needs to be determined is known as a titrant as well as analyte.
Therefore, the NaOH will be used as a titrant to titrate the 0. 02 m hcl phenol red solution.
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If the same test, given at different points in time to the same test takers, yields different scores, then the method typically used to assess this source of error is_________.
If the same test, given at different points in time to the same test takers, yields different scores, then the method typically used to assess this source of error is alternate form.
What is alternate forms test?
An alternate form or parallel form test is a test which is conducted at different time on the same set of test takers in order to test the reliability of the results obtained.
In conclusion, alternate or parallel form tests is a test of reliability.
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What is the temperature of an 11. 2-l sample of carbon monoxide, co, at 744 torr if it occupies 13. 3 l at 55 °c and 744 torr?.
The temperature of an 11.2 L sample of carbon monoxide, CO, at 744 torr is 276 K or 3°C.
What is Charles's law?Charles's law states that, "When the pressure on a sample of a dry gas is held constant, the Kelvin temperature and the volume will be in direct proportion".
According to the given information:
V ∝ T
V/T = K
Where,
V is the volume of the gas,
T is the temperature of the gas (measured in kelvins), and
K is a non-zero constant.
In two different states, an initial state 1 and a final state 2, the equation is,
[tex]\frac{V 1}{T 1}=\frac{V 2}{T 2}[/tex]
Given data:
V1 = 11.2L
V2 = 13.3L
T2 = 55°C = 328K
By substituting the given data,
[tex]\begin{aligned}&\frac{11.2}{T 1}=\frac{13.3 L}{328 K} \\&T 1=\frac{11.2 L / 328 K}{13.3 L}\end{aligned}[/tex]
∴T1 = 276K = 3°C
The temperature of an 11.2 L sample of carbon monoxide, CO, at 744 torr is 276 K or 3°C.
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Determine the limiting reagent in the following equation for the production of salt and determine the amount of NaCl produced and the mass of excess reagent. (I - 10 marks)
100g 100g
NaHCO3 + HCl —> NaCl + H2O + CO2
Answer:
Limiting Reagent: NaHCO₃
Amount of NaCl: 69.6 g NaCl
Mass of Excess Reagent: 56.6 g HCl
Explanation:
To find the mass of NaCl, you need to (1) convert mass reactant to moles reactant (via molar mass), then (2) convert moles reactant to moles NaCl (via mole-to-mole ratio from equation coefficients), and then (3) convert moles NaCl to mass NaCl (via molar mass).
Molar Mass (NaHCO₃):
22.990 g/mol + 1.008 g/mol + 12.011 g/mol + 3(15.998 g/mol)
Molar Mass (NaHCO₃): 84.003 g/mol
Molar Mass (HCl): 1.008 g/mol + 35.453 g/mol
Molar Mass (HCl): 36.461 g/mol
Molar Mass (NaCl): 22.990 g/mol + 35.453 g/mol
Molar Mass (NaCl): 58.443 g/mol
100 g NaHCO₃ 1 mole 1 mole NaCl 58.443 g
------------------------ x ------------------ x --------------------------- x ---------------- =
84.003 g 1 mole NaHCO₃ 1 mole
= 69.6 g NaCl
100 g HCl 1 mole 1 mole NaCl 58.443 g
---------------- x ------------------ x ----------------------- x ---------------- =
36.461 g 1 mole HCl 1 mole
= 160 g NaCl
Since NaHCO₃ results in the smaller amount of product, it is the limiting reagent. In other words, it is used up before the HCl has the chance to completely react. Therefore, the actual amount of NaCl produced is 69.6 grams.
To find the mass of the excess reagent, you need to calculate the amount of HCl actually used in the reaction. Then, you need to subtract that value from the total amount of HCl.
69.6 g NaCl 1 mole 1 mole HCl 36.461 g
--------------------- x ------------------ x ----------------------- x ---------------- =
58.443 g 1 mole NaCl 1 mole
= 43.4 g HCl
Amount Given - Amount Reacted = Mass Excess
100 g HCl - 43.4 g HCl = 56.6 g HCl
7. A movable piston is allowed to cool from 392°F to 104°F. If the initial volume is 105 mL,
what will be the new volume?
Answer:
27.9 mL
Explanation:
To find the new volume, you need to use the Charles' Law equation:
V₁ / T₁ = V₂ / T₂
In this equation, "V₁" and "T₁" represent the initial volume and temperature. "V₂" and "T₂" represent the final volume and temperature.
V₁ = 105 mL V₂ = ? mL
T₁ = 392 °F T₂ = 104 °F
V₁ / T₁ = V₂ / T₂ <----- Charles' Law
105 mL / 392 °F = V₂ / 104 °F <----- Insert values
0.26785 = V₂ / 104 °F <----- Simplify left side
27.9 = V₂ <----- Multiply both sides by 104
What mass of lithium carbonate (in grams) must be added to 25.0 mL of 0.335 M hydrochloric acid solution to completely neutralize the acid
Answer: 0.309g
Explanation: