Chemistry Stoichiometry Quiz

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Questions and Answers

How many moles of oxygen are required to produce 18 moles of water?

9 (correct)

How many moles of hydrogen gas are required to react with 5.5 moles of oxygen?

3.5

2.75

5.5

11 (correct)

What is the mole ratio of hydrogen gas to oxygen in the reaction?

1:1

2:1 (correct)

3:1

1:2

If 4 moles of water are produced, how many moles of hydrogen gas were consumed?

2 (D) Signup and view all the answers

If 10 grams of hydrogen gas are used in the reaction, how many grams of water will be produced?

90 (A) Signup and view all the answers

What is the molar mass of magnesium chloride (MgCl2)?

95.21 g/mol (A) Signup and view all the answers

How many grams are in 0.5 moles of sodium fluoride (NaF)?

42 g (B) Signup and view all the answers

How many moles are present in 150 grams of aluminum hydroxide (Al(OH)3)?

1.9 moles (A) Signup and view all the answers

What is the molar mass of copper(II) hydroxide, Cu(OH)2?

97.55 g/mol (A) Signup and view all the answers

If you have 2.0 moles of potassium sulfide (K2S), how many grams would you have?

220 g (A) Signup and view all the answers

What is the chemical formula of the reactant for the reaction shown in the question? (Select all that apply)

Xe (B), F2 (D) Signup and view all the answers

In calculation (b), what is the value "3.54 × 10−1 mol F2" representing?

The number of moles of Fluorine used in the reaction (D) Signup and view all the answers

What is the value 0.177 mol Xe(g) representing in the equation (b) for the reaction above?

The number of moles of Xenon needed for the complete reaction (D) Signup and view all the answers

In calculation (c), what is the mass of 4.35g F2 representing?

The mass of Fluorine used in the reaction (A) Signup and view all the answers

Based on the information in calculation (c), what is the mass of Xenon Tetrafluoride theoretically produced?

11.9g (D) Signup and view all the answers

What is the mass of Xenon theoretically produced in equation (d)?

27.1g (D) Signup and view all the answers

Which calculation represents the mass of the reactant (Xe) that would be needed to completely react with 15.7g of F2?

calculation (d) (A) Signup and view all the answers

Based on the information given, which of these components is the limiting reactant in the reaction between Xenon and Fluorine?

It cannot be determined (C) Signup and view all the answers

In the reaction between calcium fluoride and sulfuric acid, how many moles of calcium sulfate are produced when 10.0 g of calcium fluoride reacts with an excess of sulfuric acid?

0.128 mol (C) Signup and view all the answers

What is the limiting reactant in the reaction between 4.87 g of lithium nitride (Li3N) and 7.74 g of water (H2O)?

Lithium Nitride (C) Signup and view all the answers

In the reaction between aluminum and copper(II) chloride, how many moles of aluminum chloride (AlCl3) are produced when 0.25 g of aluminum reacts with an excess of copper(II) chloride?

9.3 × 10−3 mol (D) Signup and view all the answers

Which of the following reactants is in excess in the reaction between 33.76 g of zinc and 54.08 g of hydrochloric acid?

Hydrochloric acid (C) Signup and view all the answers

In the reaction between chlorine dioxide (ClO2) and water, what is the limiting reactant when 71.00 g of ClO2 reacts with 19.00 g of H2O?

Chlorine Dioxide (B) Signup and view all the answers

In the reaction between 10.0 g of calcium fluoride (CaF2) and 15.5 g of sulfuric acid (H2SO4), which reactant is in excess?

Sulfuric Acid (C) Signup and view all the answers

In the reaction CaCO3(s) + 2HCl(aq) → CaCl2(s) + CO2(g) + H2O(ℓ), what is the predicted yield of carbon dioxide if 15.7 g of CaCO3 reacts?

6.90 g (B) Signup and view all the answers

In the reaction between 4.87 g of lithium nitride (Li3N) and 7.74 g of water (H2O), how many moles of ammonia (NH3) are produced if the limiting reactant is completely consumed?

0.140 mol (C) Signup and view all the answers

What is the experimental yield of carbon dioxide if the predicted yield is 6.90 g and the percentage yield is 81.5%?

5.62 g (B) Signup and view all the answers

What does the percentage yield represent?

The ratio of the actual amount of product obtained to the theoretical amount of product that can be formed, expressed as a percentage (D) Signup and view all the answers

What is the theoretical yield of aluminum chloride (AlCl3) in moles, when 0.25 g of aluminum reacts with 0.51 g of copper(II) chloride (CuCl2)?

0.0025 mol (D) Signup and view all the answers

If the experimental yield of a reaction is less than the predicted yield, what are some possible reasons?

All of the above (D) Signup and view all the answers

What is the formula for calculating the percentage yield of a reaction?

(Experimental yield / Predicted yield) x 100% (C) Signup and view all the answers

What is the theoretical yield of iron(III) hydroxide in grams when 10.0 g of iron(III) sulfate reacts with excess sodium hydroxide?

5.35 (C) Signup and view all the answers

What is the limiting reagent in the reaction between iron(III) sulfate and sodium hydroxide as given in the content?

Iron (III) sulfate (A) Signup and view all the answers

What is the percentage yield of bromine if 20.0 g of bromic acid react with excess hydrobromic acid and produce 47.3 g of bromine?

63.6% (A) Signup and view all the answers

What is the predicted yield of lead(II) chromate in grams if 12.5 g of lead(II) chloride react with excess sodium chromate?

14.5 g (A) Signup and view all the answers

What is the correct balanced chemical equation for the reaction between bromic acid (HBrO3) and hydrobromic acid (HBr)?

HBrO3(aq) + 5HBr(aq) → 3H2O(ℓ) + 3Br2(aq) (D) Signup and view all the answers

What is the correct balanced chemical equation for the reaction between lead(II) chloride (PbCl2) and sodium chromate (Na2CrO4)?

PbCl2(s) + Na2CrO4(aq) → PbCrO4(s) + 2NaCl(aq) (D) Signup and view all the answers

Calculate the percentage yield of the bromine if the experimental yield of bromine is 47.3 g, and the theoretical yield is 74.4 g?

63.6% (B) Signup and view all the answers

Identify the product formed when lead(II) chloride reacts with sodium chromate.

Lead(II) chromate (B) Signup and view all the answers

Study Notes

Naming Ions

Positive ions are named by the element name followed by "ion"
Negative ions are named by changing the element ending to "-ide" and followed by "ion"
Group 1 forms 1+ ions
Group 2 forms 2+ ions
Group 13 forms 3+ ions
Group 15 forms 3- ions
Group 16 forms 2- ions
Group 17 forms 1- ions

Naming Ions with Variable Charges

Iron(II) and Iron(III) are named using Roman numerals following "Iron" in parentheses
Stock system uses Roman numerals
Stock system names for Fe²⁺, Fe³⁺ and other ions with variable charges are Iron(II), Iron(III)

Polyatomic Ions

Sulfate ion: SO₄^2-
Nitrate ion: NO₃^-
Hydrogen carbonate ion: HCO₃^-
Bisulfite ion: HSO₃^-
Carbonate ion: CO₃^2-
Hydroxide ion: OH^-

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Description

Test your knowledge on stoichiometry concepts in chemistry with this quiz. Questions include mole calculations, molar mass determinations, and reaction ratios. Ideal for students studying chemistry principles and equations.