Writing and Solving Equations Review

How many grams of sulfuric acid were used in the reaction?

• 62 g

• 98 g

• 36 g

• 100 g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How many different elements are in the chemical equation?

• 2

• 4

• 13

• 50

In the chemical reaction, calcium carbonate (CaCO₃) was heated to form two new substances: calcium oxide (CaO) and carbon dioxide (CO₂). CaCO₃  CaO + CO₂ A student heated 24.8 g of CaCO₃. After the reaction, they measured 13.9 g of CaO. What was the mass of the CO₂ gas that escaped during the reaction?

• 10.9 g

• 38.7 g

• 1.78 g

• 24.8 g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

5x - 4 + 2x = 3

• 1

• 2

• 3

• 4

12 = -4 (-6x - 3)

• 0

• 4

• 2

• -2

3(s + 2) - s = 38

• s=3

• s=38

• s=16

• s=1

-133 = 7(5 + 6n)

• n = 4

• n = 8

• n = -4

• n = 16

4(x+9)=20

• x=-4

• x=4

• x=14

• x=-14

r + 20 = 27

• r = 7

• r = 47

• r = 13

• r = 20

• It doubles

• It triples

• It quadruples

• It remains the same

Tags

NGSS.HS-PS1-5