How many reactants in Ti

Zinc + lead(ii) nitrate yield zinc nitrate + leadwhat's the chemical equation for this?

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

Which is an example of a reversible physical change?