Alijahvalles7443
14.01.2021 •
Chemistry
What occurs when a molecule combines with oxygen and produces heat?
A. It combusts.
B. It evaporates.
C. It precipitates.
D. It dissolves.
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Ответ:
A: It Combusts
Explanation: In a combustion reaction, a substance reacts with oxygen from the air. Combustion reactions happen at high temperatures, and transfer energy to the surroundings as light and heat.
Ответ:
The balanced chemical equation for the reaction of nitric acid and calcium hydroxide is written below.
Explanation:
A balanced chemical equation is defined as the equation in which total number of individual atoms on the reactant side is equal to the total number of individual atoms on product side.
The balanced chemical equation for the reaction of nitric acid and calcium hydroxide follows:
By Stoichiometry of the reaction:
2 moles of nitric acid reacts with 1 mole of calcium hydroxide to produce 1 mole of calcium nitrate and 2 moles of water molecule.
Hence, the balanced chemical equation for the reaction of nitric acid and calcium hydroxide is written below.