Chemistry, 30.07.2019 10:00 dre4232

Which of the following is a chemical change? a. boiling of water b. melting a cube of ice c. dissolving 10 grams of salt in water d. splitting water into hydrogen and oxygen

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Answer from: kat2788

Hey there! :D

Which of the following is a chemical change?

A chemical change is a change that alters the makeup of a substance or something. It changes what it is made of. You cannot alter chemical changes.

Boiling water can go back to regular room temperature water. This is not a chemical change.

Melting a cube of ice is not a chemical change. We can freeze the water again to make it ice.

Dissolving 10 grams of salt in water is not a chemical change. You can boil the water and split the salt and water. People do this with Ocean water, to make it drinkable.

Splitting water into hydrogen and oxygen is a chemical change. You change the makeup of the water. It is now separate hydrogen and oxygen. It is not water anymore. "D" is the answer.

I hope this helps!
~kaikers

Answer from: Quest

chemical energy is stored in the chemical bonds of atoms and molecules. it can only be seen when it is released in a chemical reaction. when chemical energy is released, the substance from which the energy came is often changed into an entirely different substance.

this chemical reaction releases energy in the form of light and heat. chemical energy is the potential energy stored in the arrangement of atoms within molecules. breaking chemical bonds requires energy, while forming new chemical bonds releases energy.

the atp molecule can store energy in the form of a high energy phosphate bond joining the terminal phosphate group to the rest of the molecule. in this form,energy can be stored at one location, then moved from one part of the cell to another, where it can be released to drive other biochemical reactions.

Answer from: Quest

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

plz give brainliest

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Which of the following is a chemical change? a. boiling of water b. melting a cube of ice c. dissol...

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