Free Printable Moles/Stoich Remediation

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Moles/Stoich Remediation

Total questions: 25

Worksheet time: 1hrs 20mins

Name

Class

Date

Using the following equation:
Fe₂O₃(s) + 3H₂(g) → 2Fe(s) + 3H₂O(l)
How many moles of iron can be made from 6 moles H₂?

4 moles Fe

6 moles Fe

9 moles Fe

2 moles Fe

2H₂ + O₂ → 2H₂O
How many moles of water can be produced if 8 moles H₂ are used?

4 moles

8 moles

16 moles

2 moles

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

B₂H₆ + 3O₂ -->2 HBO₂ + 2 H₂O
What mass of O₂ will be needed to burn 36.1 g of B₂H₆?

13.8 g O₂

3.86 mol of O₂

124 g O₂

2Al + 3H₂SO₄ -> Al₂(SO₄)₃ + 3H₂
How many grams of aluminum sulfate would be formed if 250g H₂SO₄ completely reacted with aluminum?

0.85 g

290 g

450 g

870 g

Balance the following reaction :

CaC₂(s) + H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)

1,2,2,2

1,2,1,1

2,1,1,1

2,1,2,1

CaC₂(s) + 2H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)
how many grams of Ca(OH)₂ would be formed with 3.20 moles of CaC₂?

119 g

21.2 g

114 g

237 g

How many liters of SO₂ will be produced from 55.0 L of O₂ at STP?

2H₂S + 3O₂ --> 2SO₂ + 2H₂O

55.0 Liters

36.7 Liters

18398 Liters

2.45 Liters

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

Write a Balanced Equation

Panic

Write an Unbalanced Equation

Ask for help

10.

Mole ratios are obtained from the

balanced chemical equation

periodic table

molar mass

11.

I use mole ratio (coefficients) from balanced chemical equation?

True

False

12.

A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?

Mg₄N₃

MgN₂

Mg₃N₂

MgN

13.

How many molecules are in 2.5 mol of NaCl?

1.5 x 10²⁴molecules

1.5 molecules

4.15 molecules

1.5 x 10²³molecules

14.

Which pair has the same empirical formula?

NaCrO₄ and Na₂Cr₂O₇

C₂H₄O₂ and C₆H₁₂O₆

C₃H₆O₃and C₂H₆O₂

CH₄ and C₂H₆

15.

Which of the following is a reactant in the following equation?

O₂ + C₆H₁₂O₆ > CO₂ + H₂O

CO₂

H₂O

O₂

16.

Which of the following is a product in the following equation?

O₂ + C₆H₁₂O₆ > CO₂ + H₂O

CO₂

C₆H₁₂O₆

O₂

17.

In which of the following has a chemical reaction taken place?

An apple turning brown

Milk developing a sour taste

Smoke being released as a candle burns

All of the previous

18.

Look at the chemical equation.

How many atoms of nitrogen (N) are in the reactants?

(a)

19.

Look at the chemical equation.

How many atoms of nitrogen (N) are in the products?

(a)

20.

How many atoms of iodine are in a mole of iodine?

63.55g

126.9

6.02 x 10²³

21.

The number 6.02 x 10²³ is called...

Obama's number

Bohr's number

Trump's number

Avogadro's number

22.

What is the molar mass of C₂H₄O₂?

40g

50g

60g

68g

23.

How do we get mass from moles?

multiply by avogadro's number

multiply by molar mass

divide by avogadro's number

divide by molar mass

24.

What is the mass of 0.75 moles of (NH₄)₃PO₄?

101.75 g

121.75 g

111.75 g

131.75 g

25.

If I need 20.4 moles of sodium chloride, how much should I weigh out?

0.549 g

112 g

1192 g

5077 g

100 %

Moles/Stoich Remediation

Total questions: 25

Worksheet time: 1hrs 20mins

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