Module 2: Compounds and how they interact

Module 2: Compounds and how they interact

University

20 Qs

quiz-placeholder

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Module 2: Compounds and how they interact

Module 2: Compounds and how they interact

Assessment

Quiz

Chemistry

University

Medium

Created by

Hannah Hathaway

Used 5+ times

FREE Resource

20 questions

Show all answers

1.

MATH RESPONSE QUESTION

2 mins • 1 pt

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What is the atomic number of calcium?

Mathematical Equivalence

OFF

2.

MATH RESPONSE QUESTION

2 mins • 1 pt

What is the molar mass of SF6?

You will need your periodic table to answer this question.

Mathematical Equivalence

ON

Answer explanation

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Use your periodic table to find the atomic mass of sulfur and fluorine. Recall that atomic mass is the larger number that is usually written as a decimal.

3.

MATH RESPONSE QUESTION

2 mins • 1 pt

What is the molar mass of H2O2?

You will need your periodic table to answer this question.

Mathematical Equivalence

ON

Answer explanation

Media Image

Use your periodic table to find the atomic mass of hydrogen and oxygen. Recall that atomic mass is the larger number that is usually written as a decimal.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A problem asks how many grams are in 0.85 mol of NaCl.

Which option correctly sets up this problem?

The molar mass of NaCl is 58.443 g/mol

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Answer explanation

Media Image

The key info you need from the problem is that you are starting with mol NaCl and want to end with grams NaCl. The problem tells you the molar mass of NaCl in g/mol, which is the one step in your path.

What you start with always goes first (0.85 mol), and then what does up must come down, so we must put mol NaCl on the bottom of the fraction. This way, the mol cancels out and we are left with units of g, which is what we wanted. Yay!

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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A cup of coffee contains 4.89 x 10-4 mol of caffeine. How many molecules of caffeine is this?

4.89 x 10^4 molecules
2.94 x 10^10 molecules
4.89 x 10^20 molecules
2.94 x 10^20 molecules

Answer explanation

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6.

MATCH QUESTION

1 min • 1 pt

Match the examples to the type of chemical reaction

NaCl + AgNO3 -->
AgCl + NaNO3

Combination

NH4Cl -->
NH3 + HCl

Single replacement

Fe2O3 + Al -->
Al2O3 + Fe

Double replacement

Fe + Cl2 -->
FeCl2

Decomposition

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Type of chemical reaction that involves the joining of two substances to form one compound

Decomposition reaction

Single replacement reaction

Double replacement reaction

Combination reaction

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