Option 1/A (It is the first one)
Answer: If a mineral contains only atoms of oxygen and metal, it is most likely an oxide mineral.
Explanation:
I’m pretty sure it’s the second answer B
Answer: 2
Explanation: bencause they are changing
When two gases of a chemical reaction are at the same temperature, pressure and molar volume, then the stoichiometric ratio of the gases would be 1 is to 1. Molar volume is the volume of the gas per mole of the gas. Having the same conditions for both gases would mean that they are present with the same number of moles.