What is the volume occupied by 0.106 mol of helium gas at a pressure of 0.99 atm and a temperature of 309 k ?

Asample of the male sex hormone testosterone, c19h28o2, contains 3.88×10^21 atoms of hydrogen.(a) how many atoms of carbon does it contain? (b) how many molecules of testosterone does it contain? (c) how many moles of testosterone does it contain? (d) what is the mass of this sample in grams?

The clouds are grey and ground is wet. a quantitative b qualitative

Adilute aqueous potassium nitrate solution is