Chemistry - Test Review (Molar Conversions)

Chemistry - Test Review (Molar Conversions)

9th - 12th Grade

7 Qs

quiz-placeholder

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Chemistry - Test Review (Molar Conversions)

Chemistry - Test Review (Molar Conversions)

Assessment

Quiz

Science

9th - 12th Grade

Easy

NGSS
HS-PS1-7

Standards-aligned

Created by

Matt Shull

Used 2+ times

FREE Resource

7 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

How many moles are in 72.9 g of HCl?

2.00 moles

1.34 moles

2.97 moles

6.02 x 1023

Tags

NGSS.HS-PS1-7

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What percentage of the total atomic mass of carbon monoxide (CO) is composed of oxygen?

29%

43%

57%

73%

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

How many grams are in 3.01 × 1024 molecules of (NH4)2SO4? (Molar Mass (NH4)2SO4 = 132.17 g/mol

330.28 g

496.81 g

660.85 g

872.16 g

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Media Image

How many grams of NaOH do you have to dissolve to make 725 mL of a 2.5 M solution?

48.4 g

18.2 g

72.5 g

31.9 g

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Glycerol has a molar mass of 92.09g/mol. Its percent composition is: 39.12% C, 8.75% H, and 51.12% O. What is the molecular formula for glycerol?
C2H3O2
CH2O
C2H4O2
C3H8O3

Tags

NGSS.HS-PS1-7

6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

A sample of the black mineral hematite, an oxide of iron found in many iron ores, contains 34.97 g of iron and 15.03 g of oxygen. What is the empirical formula of hematite?

FeO

Fe2O3

Fe2O2

Fe2O5

7.

MULTIPLE CHOICE QUESTION

5 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