Calculations Quiz 1

Calculations Quiz 1

12th Grade

31 Qs

quiz-placeholder

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Calculations Quiz 1

Calculations Quiz 1

Assessment

Quiz

Science

12th Grade

Practice Problem

Easy

Created by

Barry DeHaan

Used 1+ times

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31 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is the correct value for Avogadro’s number?

6.022 × 10²³

6.23 × 10²²

6.023 × 10²²

6.22 × 10²³

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Avogadro’s number is based on the number of atoms in exactly 12 g of _______.

Nitrogen-14

Hydrogen-1

Oxygen-16

Carbon-12

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many atoms are in 3.00 kg of copper?

2.84 × 10²⁴ atoms Cu

2.84 × 10²⁵ atoms Cu

3.54 × 10²⁴ atoms Cu

3.54 × 10²⁵ atoms Cu

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

An element’s atomic mass, expressed in atomic mass units on the periodic table, is equal to its ______ mass.

Actual

Molar

Theoretical

Empirical

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the molar mass of Pb(SO₄)₂?

504.7 g/mol

367.3 g/mol

399.3 g/mol

414.4 g/mol

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which formula gives the simplest whole-number ratio of the atoms in a compound?

Structural

Molecular

Empirical

Stoichiometric

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the empirical formula of a compound containing 80.00% C and 20.00% H?

C₂H₆

CH₃

C₇H₂₀

C₈₀H₂₀

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