How many atoms of nitrogen are represented in 2 (NH4) 3PO4? (My answer: C)

2

3

6

12

The two factors that are most important in determining the density of air are: a. temperature and ozone. b. temperature and salinity. c. temperature and water vapor content. d. nitrogen and water vapor content. e.

The particle with a positive charge is the particle with the smallest mass is the particle with no charge is writing one of the letters j, k, l in each box

A sample of nitrogen gas occupies 5.50 liters under a pressure of 900 mm Hg at 25⁰C. At what temperature will this sample occupy 10.0 liters at the same pressure?

The name of the commonly used hardness scale is: specific gravity organic Mohs inorganic

True or false in a neutral atom the number of protons is equal to the number of neutrons

What is the best way to compare a concentrated solution to a dilute solution, given the same volume of solution? A. The concentrated solution has less solute than the dilute solution. B.

What is the mass number of an isotope

A sample of sodium reacts completely with 0.284 kg of chlorine, forming 468 g of sodium chloride. What mass of sodium reacted?

Is it true or false that gamma rays have no mass and no electrical charge

True or False? Urea has a high solutiblity in water, due in part to its ability to form hydrogen bonds