Counting Atoms Final Review

Directions: Write the quantity of atoms of each element opposite the formula of the compound for the quantity of formula units and molecules shown. 4K₂CO₃

• K=8, C=4, O=12

• K=4, C=2, O=6

• K=2, C=4, O=8

• K=6, C=4, O=10

Tags

NGSS.MS-PS1-1

Directions: Write the quantity of atoms of each element opposite the formula of the compound for the quantity of formula units and molecules shown. 2Sr₃(PO₄)₂

• Sr=6, P=4, O=16

• Sr=3, P=2, O=8

• Sr=4, P=6, O=12

• Sr=2, P=2, O=8

Tags

NGSS.MS-PS1-1

What is the correct quantity of atoms of each element?

3N₄O₁₀

• N=12, O=30

• N=7, O=20

• N=4, O=10

• N=8, O=15

Tags

NGSS.MS-PS1-1

Directions: Write the quantity of atoms of each element opposite the formula of the compound for the quantity of formula units and molecules shown. 2(NH₄)₃N

• N=8, H=24

• N=7, H=18

• N=6, H=12

• N=10, H=30

Tags

NGSS.MS-PS1-1

Directions: Write the quantity of atoms of each element opposite the formula of the compound for the quantity of formula units and molecules shown.

8Cl₂O

• Cl=16, O=8

• Cl=8, O=16

• Cl=2, O=8

• Cl=8, O=2

Tags

NGSS.MS-PS1-1

Directions: Write the quantity of atoms of each element opposite the formula of the compound for the quantity of formula units and molecules shown. Ca(C₂H₃O₂)₂

• Ca=1, C=4, H=6, O=4

• Ca=2, C=2, H=3, O=2

• Ca=1, C=2, H=3, O=2

• Ca=2, C=4, H=6, O=8

Tags

NGSS.MS-PS1-1

Directions: Write the quantity of atoms of each element opposite the formula of the compound for the quantity of formula units and molecules shown.

12NaBr

• Na=12, Br=12

• Na=24, Br=12

• Na=6, Br=12

• Na=12, Br=24

Tags

NGSS.MS-PS1-1

Directions: Write the quantity of atoms of each element opposite the formula of the compound for the quantity of formula units and molecules shown. 3NaHCO₃

• Na=3, H=3, C=3, O=9

• Na=1, H=3, C=3, O=6

• Na=3, H=1, C=3, O=3

• Na=3, H=3, C=1, O=9

Tags

NGSS.MS-PS1-1

Directions: Write the quantity of atoms of each element opposite the formula of the compound for the quantity of formula units and molecules shown. 5Ga₂(Cr₂O₇)₃

Tags

NGSS.MS-PS1-1

Directions: Write the quantity of atoms of each element opposite the formula of the compound for the quantity of formula units and molecules shown. 7C₂S₂

• C=14, S=14

• C=7, S=7

• C=2, S=2

• C=12, S=12

Tags

NGSS.MS-PS1-1