___Mn(NO3)2 + ___NaBiO3 + ___HNO3 → ___HMnO4 + ___Bi(NO3)3 + ___NaNO3 + ___H2O algebraic method

Aballoon inflated with three breaths of air has a volume of 1.7 l. at the same temperature and pressure, what is the volume of the balloon if five more same-sized breaths are added to the balloon? a balloon inflated with three breaths of air has a volume of 1.7 l. at the same temperature and pressure, what is the volume of the balloon if five more same-sized breaths are added to the balloon?

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

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