Yes, because density is mass divided by volume. Density can't change unless a chemical change takes place, because density is how close together the molecules in a type of matter are. For example, the density of water is 1,000 kg/m³.
Isotopes are substances that have the same number of protons but differ in the number of neutrons. Hence, the pair of isotopes above should be of the same element. In the given choices, 14C is not an isotope of 14N. 206Pb is an isotope of 208 Pb. O2 and O3 differ in molecular formula but still made up of same kind of atom, hence they are allotropes, while 32S and 32S2- are not isotopes.
Answer:
fossil fuels are non-renewable resources .
<span>Copper II Sulfate- Cu 2+ and a sulfate SO4 2- add together nicely to make CuSO4. </span>
