Intro to Stoichiometry Review (2019)

Intro to Stoichiometry Review (2019)

8th - 11th Grade

30 Qs

quiz-placeholder

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Intro to Stoichiometry Review (2019)

Intro to Stoichiometry Review (2019)

Assessment

Quiz

Chemistry

8th - 11th Grade

Medium

NGSS
HS-PS1-7, HS-PS1-4

Standards-aligned

Created by

HEATHER WALTON

Used 7+ times

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30 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

Which statement is FALSE about this chemical reaction?

2 moles of hydrogen molecules will react with 1 mole of oxygen molecules.

2 grams of hydrogen will react with 1 gram of oxygen.

For every 2 moles of hydrogen molecules that react, 2 moles of water molecules will be produced.

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is the mole ratio of Aluminum to Hydrogen chloride in this reaction?

2 Al + 6 HCl → 3 H2 + 2 AlCl3

2 moles Al :6 moles HCl

26.98 moles Al : 36.46 moles HCl

2 moles Al :3 moles HCl

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is the percent by mass of calcium in CaF2 ?

24%

49%

51%

65%

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

If the molar mass of Zn3(PO4)2 is 386.17g , what is the percent composition of oxygen in zinc phosphate?

33.15%

16.04%

50.81%

19.68%

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is the percent by mass of magnesium in MgO?

20%
40%
50%
60%

6.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What is the empirical formula if you have 36.84% nitrogen and 63.16% oxygen?

NO
N2O3
N2O4
N2O5

7.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

An empirical formula:

is a formula that calculates the coefficients of a compound in a balanced equation.
is the simplest whole-number ratio of moles of elements in the compound.

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