What ion is most likely to form in compounds with potassium?

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

How do i complete this electrolysis of water lab? i’m at home, so i don’t have the materials, and the lab didn’t properly work and was incomplete at school.

Which formula can be used to calculate the molar mass of hydrogen peroxide