In the reaction ai+3o2-> 2ai2o3 what coefficient should be placed in front of the ai to balance the reaction 1,2,3,4

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.

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

Identify the missing numbers below to show the result of multiplying the numbers (1.6 × 10-19)(5.0 × 106) = c × 10d