Which of the following is NOT a reason why actual yield is less than theoretical yield?

loss of product during purification

In every chemical reaction, _____.

mass and molecules are conserved.

moles and liters are conserved.

moles and molecules are conserved.

If the percentage yield for a chemical reaction is 80.0%, the

actual yield is 80.0g for every theoretical yield of 100g.

actual yield is 80 times as much as the theoretical yield.

theoretical yield is 80 times as much as the actual yield.

theoretical yield is 80.0 g for every actual yield of 100g.

Molar masses are determined from

the mole ratio of a given amount of reactant to an unknown amount of product.

Which of the following is NOT true about limiting and excess reagents?

The reactant that has the smallest given mass is the limiting reagent.

The amount of product obtained is determined by the limiting reagent.

Some of the excess reagent is left over after the reaction is complete.

A balanced equation is necessary to determine which reactant is the limiting reagent.

Which of the following is an INCORRECT interpretation of the balanced equation shown below? 4KClO 3 --> 3KClO 4 + KCl

4 g KClO 3 --> 3 g KClO 4 + 1 g KCl

4 mol KClO 3 --> 3 mol KClO 4 + 1 mol KCl

4 molecules KClO 3 --> 3 molecules KClO 4 + 1 molecule KCl

In the chemical equation xA+xB→yC+zD, if one knows the mass of A and the molar masses of A,B, C, and D, one can determine

the mass of any of the reactants or products.

the total mass of C and D only.

the total mass of A and B only.

Which of the following is NOT true about "yield"?

The actual yield may be different from the theoretical yield because insufficient limiting reagent was used.

The value of the actual yield myst be given in order for the percent yield to be calculated.

The percent yield is the ratio of the actual yield to the theoretical yield.

The actual yield may be different from the theoretical yield because reactions do not always go to completion.

The number of significant figures in an answer to a stoichiometry problem is determined only by

the number of significant figures of any measured quantities in the problem.

the number of decimal places in the molar masses of substances in the chemical equation.

the number of significant figures in the mole ratio used to solve the problem.

The number of significant figures in the molar masses of substances in the chemical equation.

Regents Chemistry Reactions Moles Stoichiometry

10th - 12th Grade

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50 Qs

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Regents Chemistry Reactions Moles Stoichiometry

Quiz

•

Chemistry

•

10th - 12th Grade

•

Practice Problem

•

Hard

•

NGSS

HS-PS1-7, HS-PS1-2

Standards-aligned

Charles Martinez

FREE Resource

50 questions

Show all answers

MULTIPLE CHOICE QUESTION

1 min • 1 pt

2 NaClO₃ (s) --> 2NaCl (s) +3 O₂ (g)
12.00 moles of NaClO₃ will produce how many grams of O₂?

256 g of O₂

576 g of O₂

288 g O₂

Tags

NGSS.HS-PS1-7

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What can be determined from a balanced chemical equation?

Mole ratio of any two substances in the reaction

Energy released in the reaction.

Electron configuration of all elements in the reaction.

Mechanism involved in the reaction.

Tags

NGSS.HS-PS1-7

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Calculate the molar mass of Mg(OH)_2.

33.2 g/mol

41.3 g/mol

86.9 g/mol

58.3 g/mol

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If you predicted that 1.5 moles of magnesium are used in a reaction, and you have 2.0 moles of magnesium , what type of reactant is magnesium?

Limiting Reactant

Excess Reactant

Fast Reacter

Non-Reactant

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The Formula to make S'mores is:
2C + 1M + G₂→ C₂MG₂. If you have 5 Marshmallows (M), 9 Chocolate Pieces (C), and 9 Graham Cracker Halves (G), how many S'mores can you make?

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Cl₂ + 2 KBr → Br₂ + 2 KCl
How many grams of potassium chloride can be produced from 356 g of chlorine and 356 g of potassium bromide?

749 g

223 g

479 g

814 g

Tags

NGSS.HS-PS1-7

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

CH₄ + 2 O₂ → CO₂ + 2 H₂O
How many moles of carbon dioxide are produced from the combustion of 110 g of CH₄?

13.7 mol

2.75 mol

6.11 mol

6.85 mol

Tags

NGSS.HS-PS1-7

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Regents Chemistry Reactions Moles Stoichiometry

50 questions

2 NaClO₃ (s) --> 2NaCl (s) +3 O₂ (g)
12.00 moles of NaClO₃ will produce how many grams of O₂?

What can be determined from a balanced chemical equation?

Calculate the molar mass of Mg(OH)_2.

If you predicted that 1.5 moles of magnesium are used in a reaction, and you have 2.0 moles of magnesium , what type of reactant is magnesium?

The Formula to make S'mores is:
2C + 1M + G₂→ C₂MG₂. If you have 5 Marshmallows (M), 9 Chocolate Pieces (C), and 9 Graham Cracker Halves (G), how many S'mores can you make?

Cl₂ + 2 KBr → Br₂ + 2 KCl
How many grams of potassium chloride can be produced from 356 g of chlorine and 356 g of potassium bromide?

CH₄ + 2 O₂ → CO₂ + 2 H₂O
How many moles of carbon dioxide are produced from the combustion of 110 g of CH₄?

For the Balanced Reaction: 3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?

What is the first thing you must do to solve a stoichiometry problem?

What number should be in front of the NF₃ in this chemical reaction?
_N₂+_F₂ --> ___ NF₃

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Chemistry

Regents Chemistry Reactions Moles Stoichiometry

50 questions

2 NaClO3 (s) --> 2NaCl (s) +3 O2 (g) 12.00 moles of NaClO3 will produce how many grams of O2?

What can be determined from a balanced chemical equation?

Calculate the molar mass of Mg(OH)2.

If you predicted that 1.5 moles of magnesium are used in a reaction, and you have 2.0 moles of magnesium , what type of reactant is magnesium?

The Formula to make S'mores is:2C + 1M + G2 → C2MG2. If you have 5 Marshmallows (M), 9 Chocolate Pieces (C), and 9 Graham Cracker Halves (G), how many S'mores can you make?

Cl2 + 2 KBr → Br2 + 2 KCl How many grams of potassium chloride can be produced from 356 g of chlorine and 356 g of potassium bromide?

CH4 + 2 O2 → CO2 + 2 H2O How many moles of carbon dioxide are produced from the combustion of 110 g of CH4?

For the Balanced Reaction: 3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?

What is the first thing you must do to solve a stoichiometry problem?

What number should be in front of the NF3 in this chemical reaction?___N2+___F2 --> ___ NF3

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Chemistry

2 NaClO₃ (s) --> 2NaCl (s) +3 O₂ (g)
12.00 moles of NaClO₃ will produce how many grams of O₂?

Calculate the molar mass of Mg(OH)_2.

The Formula to make S'mores is:
2C + 1M + G₂→ C₂MG₂. If you have 5 Marshmallows (M), 9 Chocolate Pieces (C), and 9 Graham Cracker Halves (G), how many S'mores can you make?

Cl₂ + 2 KBr → Br₂ + 2 KCl
How many grams of potassium chloride can be produced from 356 g of chlorine and 356 g of potassium bromide?

CH₄ + 2 O₂ → CO₂ + 2 H₂O
How many moles of carbon dioxide are produced from the combustion of 110 g of CH₄?

For the Balanced Reaction: 3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?

What number should be in front of the NF₃ in this chemical reaction?
_N₂+_F₂ --> ___ NF₃