I'd say no because the only pure substances are elements
B .combustion because HOH and CO2 are the products of complete combustion
The scientific notation should specific the significant digits. So it to write like x.xx * 10 ^ x. So the answer is 6.421 * 10 ^3.
The diatomic molecule with a triple covalent bond is N2.
Nitrogen has five atoms in its valence shell. In order for it to attain the octet structure, that is, to have eight electrons in its outermost shell, it has to donate three electrons, just like the other element it is reacting with in order to form a triple covalent bond.
Do you mean climate? If so;
Essentials, healthy ecosystems and rich biodiversity are fundamental to life on our planet. Climate is affecting the habitats of several creatures, which must migrate to areas with better conditions. Even small changes in average temperatures can have a significant effect upon ecosystems.
