How do you convert 642cg to kilograms

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.

Electrons are extremely important to what area of technology? a) anti-aging research b) household product development c) electronics d) drug discovery

How many moles of no2 will form when 3.3 moles of cu are reacted with excess hno3?