You are picking an order and come across a box of perfume. What should you do? Please choose all that apply

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.

Which item is most likely part of the safety contract

Na chemical reaction, activation energy increases the of the reactants. this outcome causes the particles to collide, which results in the of new products.