Question

Ethylene reacts to give `C_2H_4O_2`...what is the product?

Answer 1

Can you tell us what the product is?

Explanation:

Now, clearly, the `C_2H_4` reactant is `"ethylene"`, `H_2C=CH_2`.

But the `C_2H_4O_2` product could be `"acetic acid"`, `H_3C-CO_2H`; it could be `"1,2-dioxetane"`, a cyclic peroxide; it could be a cyclic ether. Unless you specify the product, we cannot suggest its synthesis.