Unit 7 Chemical Reactions

? CaCl₂ + ? Na₃PO₄ → ?Ca₃(PO₄)₂ + ? NaCl

When balanced, what do the sum of the coefficients equal to?

• 5

• 6

• 11

• 12

?PCl₅ + ?H₂O → ?H₃PO₄ + ? HCl

When balanced, what does the sum of the coefficients equal to?

• 13

• 12

• 11

• 9

Tags

NGSS.HS-PS1-7

Tin II oxide reacts with hydrogen gas to produce tin metal and water. What type of reaction is this and what do the sum of the coefficients add up to?

• 4 - Synthesis

• 6- Synthesis

• 4- Single replacement

• 6- Single replacement

Once balancing the following chemical reaction, what do the coefficients add up to?

? CO₂ + ? H₂O →? C₆H₁₂O₆ + ? O₂

• 4

• 12

• 18

• 19

Tags

NGSS.HS-PS1-7

C₂H₆ combusts and releases a large amount of energy. What do the coefficients of the balanced chemical equation for this combustion reaction add up to?

• 7

• 8

• 19

• 10

Aluminum metal reacts with oxygen gas in a synthesis reaction. What would the coefficient of aluminum metal be in the balanced chemical reaction?

• 1

• 2

• 3

• 4

? CaCl₂ + ? Na₃PO₄ → ?Ca₃(PO₄)₂ + ? NaCl

What type of chemical reaction is this?

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

? NH₃ + ? O₂ → ? NO + ? H₂O

When balanced, what do the sum of the coefficients equal to?

• 6

• 8

• 12

• 19

NaCl + AgNO₃ → AgCl + NaNO₃

What type of chemical reaction would this be classified as?

• Synthesis

• Decomposition

• Single Replacement

• Double replacement

CaCO₃ → CaO + CO₂

What type of chemical reaction would this be classified as?

• Synthesis

• Decomposition

• Single Replacement

• Double replacement