What is the pressure inside of a vacuum?
a. 100 kPa
b. 760 torr
c. 1 atm
d. 0 atm

How many atoms are in 1.4 mil of phosphorus trifluoride (pf3)

Much of the general structure and physical properties of the interior of the earth are inferred from: a)deep oil and gas bore holes b)geologic investigations c)analysis of seismic waves d) study of volcanoes

Which of the following are sources of revenue for media companies? a. direct sales to producers b.advertising and subscriptions c. online purchase d. capital investments