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son4ous [18]
3 years ago
13

Which of the following decomposition reactions is/are correct?

Chemistry
2 answers:
qwelly [4]3 years ago
7 0
<span>A) 2NaOH -> 2Na + O2 + H2
is not correct since Na is unstable

B) 2NaOH -> 2Na + H2O + 1/2O2
is not correct since Na is unstable

C) 2NaOH -> Na2O + H2O
is correct since N2O is stable

D) 2NaOH -> 2Na + H2O2
is not correct since Na is unstable</span>
maxonik [38]3 years ago
5 0

<u>Answer:</u> The correct statement is only reaction C is correct.

<u>Explanation:</u>

Decomposition reaction is defined as the reaction in which one large compound breaks down into smaller compounds.

NaOH is a base known as sodium hydroxide. The decomposition reaction for sodium hydroxide follow the equation:

2NaOH\rightarrow Na_2O+H_2O

By Stoichiometry of the reaction:

2 moles of sodium hydroxide decomposes into 1 mole of sodium oxide and 1 mole of water.

Hence, the correct statement is only reaction C is correct.

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A 28.5 gram piece of iron is added to a graduated cylinder containing 45.5 mL of water. The water in the cylinder rises to the 4
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7.91 g/ml is the density of the iron piece of 28.5 gms.

Explanation:

The density of a substance is defined as the volume it occupies.  It tells the matter present in a substance.

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I just took the test and i got it right

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