Explain what is meant by the atomic mass unit (amu) ?

the density of dry air at 20 degrees celsius is 1.20 g/L. What is the mass of air, in kilograms, of a room that measures 24.0m by 15.0 m by 4.0 m

Calculate the heat capacity, in joules per degree and in calories per degree, for 45.8 g of nitrogen gas. [heat capacity of n2 (g) = 1.04j/g0c] [1 cal=4.184j]

Which material most likely formed through chemical precipitation

FeCl3 (aq) + Na3PO4 (aq) - - > FePO4 (s) + NaCl (aq) [unbalanced]

There is 737 grams of mass of NaCl in a package of Morton Salt. NaCl has 58.4g in one mole, so isn't it 737 times 1 divded by 58.4g to find the amount of moles?

Molar mass of Fe2 (CO3) 3

If you put a straw into a glass of water, the straw looks to be bent, although nothing has physically happened to the straw. The term that describes this property of light is A) absorption. B) diffraction. C) reflection. D) refraction.

A constant volume of gas is heated from 25.0ºC to 150.ºC. If the initial pressure was 760. torr, what is the final pressure?

The concentration of 1130 + in a solution is found to be 1.75 X 10-8 M 250C. Find [OH].

W Which are forms of kinetic energy? A light, sound, chemical B electrical, chemical, sound C sound, potential, thermal D light, thermal, sound