A rectangular block has the mass of 99.6 grams, the length of 3.40 cm, the width of 2.59 cm, and the height of 3.78 cm. What is the density (g/mL) of the block? (Keep
three significant figures.)

Which statement is a reason to support population regulation? a) it is unethical for us to control birth control rates b) humans have the freedom to produce as many children as desired c) the gap between the rich and poor has been narrowing since 1960 d) billions more people on the earth will intensify many environmental and social problems

Which terms are used to identify pure substances

The polymer used for the nonstick surface of cooking utensils is 24.0%c and 76%f by mass. what is the empirical formula of this polymer?