Practice question. How would I write the equation for this problem?

Areaction is first order with respect to reactant x and second order with respect to reactant y. which statement describes the rate law for this reaction?

How many moles of lead are in 1.50 x 10^12 atoms of lead? could you explain the answer as well and not just give it to me i am refreshing for finals and i need to know how to do it

Select the correct answer. wax is a nonpolar substance. in which type of substance is it most soluble?