D.
Energy cannot be created nor destroyed. It is just transferred through sound, heat and light.
That is correct! Great Job High School!
Explanation:
First Question
- The correct chemical formular is ; Al2(SO4)3
Second question
The following applies;
- The mass of the products is the same as the mass of the reactants
- At least one new product formed is a gas
- Molecules are changing into different molecules
Third Question
- Zn + HCl → ZnCl2 + H2
Fourth Question
- The atoms in the original substances regroup and form a different substance
- Matter is conserved
- The same atoms are present before and after the reaction
In the following choices, all of the above are an end product of fractional distillation except for one. The ones that are the end product of fractional distillation are, asphalt, heating oil and kerosene. Crude petroleum is not an end product of fractional distillation, so the correct answer is letter A.
You can determine whether your necklace is real gold or not which is done by exposing the necklace to an acid. It is from the fact that gold would dissolve in aqua regia. So when bubbles appears, it most likely be that the gold is dissolved and is real.