3 years ago

Which of the following is not an example of a chemical change?

Chemistry

1 answer:

Eva8 [605]3 years ago

8 0

D I think.. hopefully it helps a little

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In a combustion reaction, ethanol (C2H5OH) is burned in the presence of oxygen (O2), producing carbon dioxide (CO2) and water (H

charle [14.2K]

Answer:
Reactants: Ethanol (C₅H₅OH), Oxygen (O₂)

Products: Carbon dioxide (CO₂) and Water (H₂O)

Explanation:
Let’s rewrite each part of the described situation in chemical equation terms.

Ethanol - C₂H₅OH
is burned in the prescence of - +
oxygen - O₂
producing - →
carbon dioxide - CO₂
and - +
water - H₂O

Chemical equation:
C₂H₅OH + O₂ → CO₂ + H₂O

The terms on the left side of a chemical equation are reactants, and the terms on the right side of a chemical equation are products.

Therefore, since we know this, ethanol (C₂H₅OH) & oxygen (O₂) are the reactants, and carbon dioxide (CO₂) & water (H₂O) are the products.

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3 years ago

A student mixes some water at room temperature with a white powder also at room temperature. The white powder disappears into th

Leya [2.2K]

Chemical change, because the white powder heated the water and caused a thermal reaction, and possibly gas was produced due to bubbles.

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3 years ago

What sequence should be followed when conducting a laboratory investigation? Make observations, gather experimental data, form a

AURORKA [14]

Answer:

Define a problem, form a hypothesis, gather experimental data, form a conclusion

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