Chemical Quantities

Chemical Quantities

10th - 12th Grade

14 Qs

quiz-placeholder

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Assessment

Quiz

Chemistry

10th - 12th Grade

Practice Problem

Medium

NGSS
HS-PS1-7

Standards-aligned

Created by

Erin Husband

Used 94+ times

FREE Resource

About this resource

This quiz focuses on chemical quantities, specifically covering stoichiometry and mole calculations in chemistry. The content is appropriate for grades 10-12, as evidenced by the complexity of multi-step calculations involving molar mass, percent composition, empirical and molecular formulas, and conversions between moles, atoms, molecules, and mass. Students need a solid foundation in atomic structure, the periodic table, and mathematical problem-solving skills to successfully navigate these problems. The questions require understanding of Avogadro's number, molar mass calculations, the mole concept as a bridge between atomic and macroscopic scales, and the ability to manipulate chemical formulas to determine empirical versus molecular formulas. Additionally, students must demonstrate proficiency in percentage calculations, dimensional analysis, and working with scientific notation to solve gas law problems at standard temperature and pressure. Created by Erin Husband, a Chemistry teacher in the US who teaches grades 10 and 12. This assessment serves as an excellent tool for evaluating student mastery of fundamental quantitative chemistry concepts that form the backbone of advanced chemical understanding. Teachers can deploy this quiz as a formative assessment after completing a stoichiometry unit, use individual questions as warm-up problems to reinforce daily lessons, or assign it as homework to gauge student readiness before summative testing. The variety of question types makes it particularly valuable for identifying specific areas where students need additional support, whether in basic mole conversions or more complex empirical formula determination. This quiz aligns with NGSS HS-PS1-7 (using mathematical representations to support the claim that atoms are conserved during chemical reactions) and supports Common Core mathematical practices in chemistry contexts.

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14 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

How many hydrogen atoms are in the compound: (NH4)2CO3

3
4
6
8

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the percent composition of nitrogen in NH3?

25%
14%
28%
82%

3.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which of the following is an empirical formula?

C3H3
Li2CO3
Na2O2
C6H12O6

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

How many moles are contained in 45 grams of aluminum?

27 mol
1215 mol
1.7 mol
57 mol

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

If the empirical formulas is CH and the molar mass is 78g/mol, what is the molecular formula?

C6H6
C5H18
CH
6CH

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

How many moles of silver atoms are in 1.8 x1020 atoms of silver?

3.0 x10 -4 mol
3.3 x 10 -3 mol
3.0 x 102 mol
1.1 x 1044 mol

Tags

NGSS.HS-PS1-7

7.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is the empirical formula of a substance that is 53.5%C, 15.5%H, and 31.1% N by weight?

C3HN2
C4H14N2
C2H7N
CH4N7

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