A balloon has .01mol He. It's inflated fully to 1.35L holding .7mol, what's the initial volume?

Oxygen= 88ghydrogen= 12g

The ratio is 3: 2. i.e. c.

The main types of electromagnetic radiation. radio  waves have  the lowest frequencies  and  longest  wavelengths, while gamma  waves have highest frequencies  and shortest wavelengths. the wavelengths vary across the electromagnetic spectrum from about 10–15 m to more than 104 m.hope it !