AnswersAA-F26 Physical ScienceDescribing Chemical Reactions

Describing Chemical Reactions Answers

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The expression CaCO3 → CaO + CO2 is an example of a

A
reactant.
B
product.
C
chemical equation.
D
chemical progression.
3

In the product 6O2, what does the coefficient mean?

A
There are 12 molecules of O2,
B
There are 8 molecules of O2,
C
There are 6 molecules of O2.
D
There are 2 molecules of O2.
4

Franklin was performing an experiment by combining hydrochloric acid and sodium hydroxide. He measured the mass of his reactant materials to be 35g. The reaction resulted in the production of salt and water. He reported that his products weighed 32g.Which best describes the results of Franklin’s experiment?

A
No error occurred, some of the products are always lost as heat.
B
An error occurred, the mass of the reactants should equal the mass of the products.
C
An error occurred, the products should weigh more than the reactants.
D
No error occurred, water is not weighed when determining the weight of the products.
5

What is the number “4” in SiCl4?

A
a subscript
B
a coefficient
C
a product
D
a reactant
6

For the equation 3Cu + 8HNO3 → 3Cu(NO3)2 + 2NO + 4H2O, how many units of NO3 are represented on the products side?

A
2
B
3
C
6
D
8
7

Liquid 1 reacts with Liquid 2, producing a solid and a gas. Using this scenario, which supports the law of conservation of mass?

A
mass of Liquid 1 + mass of solid = mass of Liquid 2 + mass of gas
B
mass of Liquid 1 – mass of solid = mass of Liquid 2 – mass of gas
C
mass of Liquid 1 – mass of Liquid 2 = mass of solid + mass of gas
D
mass of Liquid 1 + mass of Liquid 2 = mass of solid + mass of gas

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Describing Chemical Reactions Answers — AA-F26…