In hydrate ratio does the mass of salt come first or does the mass of water

The covalent compound acetylene, which is the fuel of the oxyacetylene torch used by welders, has the molecular formula c2h2. the covalent compound benzene, a commercial solvent, has the molecular formula c6h6 each of these covalent compounds contains carbon and hydrogen atoms in a one-to-one ratio. would it be correct to write the chemical formulas of each as ch? explain.

The climate of the continental united states is generally 1. tropical 2. temperate 3. arctic 4. highland

Which of the following words describe the reality that the universe looks the same from various perspective