Free Printable SS Chapter 9

1.

Which letter represents amplitude? (a)

Choose from the below words

A

B

C

D

E

2.

A compound containing 92.3 percent carbon and 7.7 percent hydrogen. What is the empirical formula?

a)

CH

b)

CH₂

c)

C₂H

d)

C₂H₂

3.

Calculate the number of atoms in 0.0340 g Zn.

a)

5.200 x 10^-4 atoms Zn

b)

3.130 x 10²³ atoms Zn

c)

3.130 x 10²⁰ atoms Zn

d)

1 atom Zn

4.

Which pair has the same empirical formula?

a)

NaCrO₄ and Na₂Cr₂O₇

b)

C₂H₄O₂ and C₆H₁₂O₆

c)

C₃H₆O₃and C₂H₆O₂

d)

CH₄ and C₂H₆

5.

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

a)

Molecular Formula

b)

Chemical Formula

c)

Empirical Formula

d)

Distance Formula

6.

What is the molecular formula if the empirical formula is CH₂O and the molecular molar mass is 180.18?

a)

CH₂O

b)

C₂H₄O₂

c)

C₄H₈O₄

d)

C₆H₁₂O₆

7.

Given the following: 42.07% Na, 18.89% P, and 39.04% O, determine the empirical formula.

a)

NaPO2

b)

Na2PO3

c)

Na3PO4

d)

NaPO4

8.

What is the empirical formula of a compound containing 40% carbon, 6.7% hydrogen, and 53.3% oxygen?

a)

$CH_2O$

b)

$C_2H_4O_2$

c)

$C_3H_6O_3$

d)

$C_6H_{12}O_6$

9.

Which of the following compounds has the same empirical formula as glucose (C_6H_{12}O_6)?

a)

$C_2H_4O_2$

b)

$C_3H_6O_3$

c)

$C_4H_8O_4$

d)

$C_5H_{10}O_5$

10.

A compound is found to contain 85.7% carbon and 14.3% hydrogen. What is its empirical formula?

a)

$CH$

b)

$CH_2$

c)

$C_2H_2$

d)

$C_2H_4$

11.

What is the molecular formula if the empirical formula is $CH_2$ and the molecular molar mass is 56 g/mol?

a)

$CH_2$

b)

$C_2H_4$

c)

$C_3H_6$

d)

$C_4H_8$

12.

Given the following: 27.29% Na, 14.29% C, and 58.42% O, determine the empirical formula.

a)

$NaCO_2$

b)

$Na_2CO_3$

c)

$Na_2C_2O_4$

d)

$NaCO_3$

13.

Which of the following is a correct empirical formula for a compound with 40% sulfur and 60% oxygen?

a)

$SO$

b)

$SO_2$

c)

$S_2O_3$

d)

$S_2O_4$

14.

A compound has an empirical formula of $CH_3$ and a molar mass of 30 g/mol. What is its molecular formula?

a)

$CH_3$

b)

$C_2H_6$

c)

$C_3H_9$

d)

$C_4H_{12}$

15.

What is the empirical formula of a compound containing 36.8% nitrogen and 63.2% oxygen?

a)

$NO$

b)

$NO_2$

c)

$N_2O_3$

d)

$N_2O_5$

16.

Which of the following pairs has the same empirical formula?

a)

$C_2H_4$ and $C_3H_6$

b)

$C_2H_2$ and $C_4H_4$

c)

$C_3H_8$ and $C_4H_{10}$

d)

$C_5H_{10}$ and $C_6H_{12}$

17.

A compound with an empirical formula of $CH_2O$ has a molar mass of 90 g/mol. What is its molecular formula?

a)

$CH_2O$

b)

$C_2H_4O_2$

c)

$C_3H_6O_3$

d)

$C_4H_8O_4$

18.

What is the empirical formula of a compound containing 30.4% nitrogen and 69.6% oxygen?

a)

$NO_2$

b)

$N_2O_4$

c)

$N_2O_5$

d)

$N_2O_3$

19.

Which of the following compounds has the same empirical formula as acetic acid (C_2H_4O_2)?

a)

$C_3H_6O_3$

b)

$C_4H_8O_4$

c)

$C_5H_{10}O_5$

d)

$C_6H_{12}O_6$

20.

A compound is found to contain 92.3% carbon and 7.7% hydrogen. What is its empirical formula?

a)

$CH$

b)

$CH_2$

c)

$C_2H$

d)

$C_2H_2$

21.

What is the molecular formula if the empirical formula is $C_2H_5$ and the molecular molar mass is 58 g/mol?

a)

$C_2H_5$

b)

$C_3H_6$

c)

$C_4H_{10}$

d)

$C_5H_{12}$

22.

Given the following: 42.07% Na, 18.89% P, and 39.04% O, determine the empirical formula.

a)

$NaPO_2$

b)

$Na_2PO_3$

c)

$Na_3PO_4$

d)

$NaPO_4$

23.

Which of the following is a correct empirical formula for a compound with 50% sulfur and 50% oxygen?

a)

$SO$

b)

$SO_2$

c)

$S_2O_3$

d)

$S_2O_4$

24.

A compound has an empirical formula of $CH_4$ and a molar mass of 32 g/mol. What is its molecular formula?

a)

$CH_4$

b)

$C_2H_8$

c)

$C_3H_{12}$

d)

$C_4H_{16}$

25.

What is the empirical formula of a compound containing 25.9% nitrogen and 74.1% oxygen?

a)

$NO_2$

b)

$N_2O_4$

c)

$N_2O_5$

d)

$N_2O_3$

SS Chapter 9

Total questions: 25

Worksheet time: 25mins

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