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3 years ago

Which substance can not be decomposed by a chemical change?

Chemistry

2 answers:

oksian1 [2.3K]3 years ago

8 0

The substance that can not be decompoased by a chemical change is B. Carbon

FrozenT [24]3 years ago

3 0

Carbon because it an element in comparison to eater for example which is a mixture of hydrogen and oxygen.

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Which of the following is the best way to separate two liquids?

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Decanting is your answer

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3 years ago

Put hydrogen bonds dispersion forces and dipole-dipole forces in order

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temporary dipole induced dipole interactions
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3 years ago

How do differences in temperature effect air masses?

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The difference in temperature causes differences in air pressure between the two spots. ... This causes the jet stream to dip farther south and the winds to blow stronger on either side of the jet stream in winter. The jet stream separates the very cold air mass at higher latitudes from the warmer air mass equatorward.

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3 years ago

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Which balanced equation represents a redox reaction? a. AgNO3(aq) +NaCl(aq) →AgCl(s) +NaNO3(aq) b. H2CO3(aq) →H2O() + CO2(g) c.

Aleks [24]

Answer : The correct option is, (D) $Mg(s)+2HCl(aq)\rightarrow MgCl_2(s)+H_2(g)$

Explanation :

(A) $AgNO_3(aq)+NaCl(aq)\rightarrow AgCl(s)+NaNO_3(aq)$

This reaction is a double displacement reaction in which the cation and anion of two reactants are exchange their places to give two different products.

(B) $H_2CO_3(aq)\rightarrow H_2O(l)+CO_2(g)$

This reaction is a decomposition reaction in which the larger molecule decomposes to give two or more products.

(C) $NaOH(aq)+HCl(aq)\rightarrow NaCl(s)+H_2O(aq)$

This reaction is a neutralization reaction in which an acid and a base react to give a salt and water as a product.

(D) $Mg(s)+2HCl(aq)\rightarrow MgCl_2(s)+H_2(g)$

This reaction is a redox reaction in which the oxidation and reduction reaction occur simultaneously.

Oxidation reaction is the reaction in which a substance looses its electrons. In this oxidation state increases.

Reduction reaction is the reaction in which a substance gains electrons. In this oxidation state decreases.

In this reaction, magnesium shows oxidation due to change in oxidation number from (0) to (+2) and hydrogen shows reduction due to change in oxidation number from (-1) to (0).

Hence, the correct option is, (D)

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3 years ago

Attracting electrons to form chemical bonds is called what

MAXImum [283]

Answer: Ionic bonding

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3 years ago

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