As the owner of a small restaurant, you purchase 5 boxes of napkins for $75.00 every 3 months. Each box contains 525 napkins. What is the average number of napkins you expect to use each month?

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?

The identities of substances are the same before and after which type of change