What was the signifcance collisions of dust, rock and ice during earths formation

The pressure in a fluid is affected by which characteristics of that fluid

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.

What is the average rate of the reaction between 10 and 20 s?