# Chemical Formulas And Counting Atoms: Question Preview (ID: 30969)

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**How many oxygen atoms in CO2 ?**

a) 1

b) 2

c) 3

d) 4

**How many oxygen atoms in 3CO2 ?**

a) 4

b) 5

c) 6

d) 7

**How many atoms in 4NaCl ?**

a) 2

b) 4

c) 8

d) 12

**How many molecules in 12 HOH ?**

a) 2

b) 3

c) 6

d) 12

**How many hydrogen atoms in 12 HOH ?**

a) 12

b) 2

c) 24

d) 3

**How many elements in NaClHNOPS ?**

a) 1

b) 7

c) 9

d) 14

**How many sodium atoms in 5NaClS ?**

a) 1

b) 3

c) 5

d) 15

**How many atoms in 14NaCl ?**

a) 2

b) 14

c) 28

d) 15

**Which is NOT a compound?**

a) NaCl

b) H2O

c) O2

d) CO2

**How many total atoms are in 4 H2SO4 ?**

a) 4

b) 5

c) 20

d) 28

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