2 NH3 + H2SO4 --> 2 NH4 + SO4 How many moles of NH4 will be made when ten moles of NH3 react?

Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.

Select all of the methods through which a drug can enter your body. injection swallowing inhalation absorption

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.