the mole review

the mole review

9th - 12th Grade

14 Qs

quiz-placeholder

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the mole review

the mole review

Assessment

Quiz

Chemistry

9th - 12th Grade

Medium

NGSS
HS-PS1-7, MS-PS1-1

Standards-aligned

Created by

Dustin Williams

Used 3+ times

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14 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What is the percent by mass of oxygen in MgO?

20%
40%
50%
60%

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What is the percent composition by mass of sulfur in the compound MgSO4 (gram formula mass = 120 g/mol)?

20%
27%
46%
53%

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What is the molar mass of table salt (NaCl)?

116.886 g/mol
35.453 g/mol
22.990 g/mol
58.443 g/mol

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

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

Mg4N3
MgN2
Mg3N
MgN

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of the following is considered an empirical formula?

CH3COOH
C6H12O6
H2O

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

You are given the following percentages: 40.05% S and 59.95% O. Find the empirical formula for these elements.

SO
SO2
SO3
SO4

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What is the empirical formula if you have 81.82% carbon and 18.18% hydrogen?

C3H8
CH4
C2H2
C4H10

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