Pls help

Indicate whether the specified alkyl halides will form primarily substitution products, only elimination products, both substitution and elimination products, or no products when they react with sodium methoxide. 1-bromobutane 1-bromo-2-methylpropane 2-bromobutane 2-bromo-2-methylpropane

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?

What is the percentage of hydrogen in c2h4