Molar Mass and Chemical Composition

Molar Mass and Chemical Composition

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Hard

Created by

Liam Anderson

FREE Resource

This video tutorial explains how to calculate the molar mass of chemical compounds using their formulas. It covers basic examples like SO2 and C3H8O, and progresses to more complex compounds with parentheses and hydrates. The tutorial emphasizes understanding the number of atoms in a formula and using the periodic table to find atomic weights. By the end, viewers will be equipped to calculate molar mass for various chemical formulas, including those with parentheses and hydrates.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the molar mass of SO2?

16.0 g/mol

64.7 g/mol

128.0 g/mol

32.7 g/mol

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many oxygen atoms are present in one molecule of C3H8O?

Three

One

Two

Four

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the molar mass of C3H8O?

88.2 g/mol

44.1 g/mol

60.11 g/mol

72.15 g/mol

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the compound Ca(NO3)2, how many nitrogen atoms are present?

Four

Three

Two

One

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the molar mass of Ca(NO3)2?

100.1 g/mol

200.2 g/mol

164.10 g/mol

128.0 g/mol

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many hydrogen atoms are in (NH4)3P4?

Sixteen

Twelve

Eight

Four

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the molar mass of (NH4)3P4?

149.12 g/mol

200.0 g/mol

180.0 g/mol

160.0 g/mol

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