Question

Matter Interactions Unit Test
11 of 1311 of 13 Items






Question
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

H2O

Answer 1

Matter Interactions Unit Test
11 of 1311 of 13 Items






Question
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

H2O
H 2 O

O2
O 2

H2
H 2

CH2OH
CH 2 OH
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Answer 2

The image is a model of sulfuric acid that has a chemical formula of H2SO4. In 1-2 sentences, explain why creating models, like the one shown in the image above, is important in understanding substances.

(2 points)

Answer 3

No, H2O cannot be added to balance the equation because it is not part of the equation and would not react with any of the substances in the equation.

Answer 4

H2O can be added to the products to balance the equation.

Answer 5

Creating models is important in understanding substances because they provide a visual representation that helps us visualize the structure, composition, and arrangement of atoms in the substance, making it easier to comprehend its properties and behavior.