25.5 g of NaCl was dissolved in 150. mL of water. what is the molality of the solution(molar mass of NaCl=58.5g/mol, density of water= 1.00g/mL)_ m

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?

Which of the following would have less momentum than a 52 kg cheetah running at 10 m/s?