Use the periodic table to calculate the molar mass of each compound below. give your answer to the correct number of significant figures.

Consider the directing effects of the substituents on salicylamide and predict the possible structures of the iodination products. which do you think will be the major product?

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate

Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium