Empirical Formula and Percentage Composition

Empirical Formula and Percentage Composition

11th Grade

25 Qs

quiz-placeholder

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Empirical Formula and Percentage Composition

Empirical Formula and Percentage Composition

Assessment

Quiz

Science

11th Grade

Hard

NGSS
HS-PS1-7, MS-PS1-1, HS-PS1-1

+2

Standards-aligned

Created by

Lisa Thompson

FREE Resource

25 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Find the percent composition of Cu2S?

%Cu= 67.987 %S= 32.013

%Cu= 79.854   %S= 20.145

%Cu= 35.946   %S= 64.054

Tags

NGSS.HS-PS1-7

2.

MULTIPLE CHOICE QUESTION

1 min • 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

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following is considered an empirical formula?

CH3COOH

C6H12O6

H2O

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A formula with the lowest whole # ratio of elements in a compound is called

Molecular Formula

Chemical Formula

Empirical Formula 

Distance Formula

5.

LABELLING QUESTION

1 min • 1 pt

How would you calculate the percentage of Hydrogen?

d
c
a

2

18

16

100

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the percent by mass of magnesium in MgO?

20%

40%

50%

60%

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the approximate percent by mass of magnesium in MgO?

20%

40%

50%

60%

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