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devlian [24]
4 years ago
15

Which elements are metals? check all that apply. rhenium (re) boron (b) lithium (li) krypton (kr) phosphorus (p) mercury (hg)?

Chemistry
2 answers:
Digiron [165]4 years ago
6 0

Answer:

Lithium, mercury, and rhenium

Explanation:

tangare [24]4 years ago
4 0

Lithium, mercury, and rhenium are all metals.

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HELLPPPPP MEEEEEE
umka2103 [35]

The products and the reactants are the components of the reaction. The equation of phosphoric acid represents the decomposition reaction as it forms oxygen and water. Thus, option a is correct.

<h3>What is a decomposition reaction?</h3>

A decomposition reaction is a  chemical breakdown of the reactant into two or more products. The large and complex compound breaks into smaller and simpler molecules.

The following equation, 4 H₃PO₄ → P₄ + 5 O₂ + 6 H₂O is an example of decomposition as phosphoric acid breaks into phosphorus, water, and oxygen molecules.

Therefore, option a. the reaction of phosphoric acid is a decomposition reaction.

Learn more about decomposition reaction here:

brainly.com/question/24936069

#SPJ1

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