I need help ASAP please

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

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

Nonpoint source pollution is difficult to control because it