Asked by Lettuce?

Use the unbalanced chemical equation to answer the question.

2NaHCO3 → Na2CO3 + CO2

Which of the following can be added to the products to balance the equation?

(1 point)
Responses

H2
H 2

CH2OH
CH 2 OH

O2
O 2

H2O

Answers

Answered by Lettuce?
Use the chemical equation to complete the activity.

2Cu+S→Cu2S

Copper (Cu) reacts with sulfur (S) to form copper sulfide as shown in the equation. A scientist adds 12.7 grams of Cu to 3.2 grams of S to start the reaction. In this reaction, all of the copper and all of the sulfur react. Before running the experiment, the scientist expected the products of the reaction will be a total of 15.9 grams of copper sulfide (Cu2S). In 1–2 sentences, explain the law that the scientist used to predict that the product of the reaction would be 15.9 grams of copper sulfide.

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