Use the balmer's theory to determine the frequency in per second of the radiation corresponding to n=5

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

The following reaction shows sodium carbonate reacting with calcium hydroxide. na2co3 + ca(oh)2 → naoh + caco3 how many grams of naoh are produced from 20.0 grams of na2co3? (molar mass of na = 22.989 g/mol, c = 12.01 g/mol, o = 15.999 g/mol, ca = 40.078 g/mol, h = 1.008 g/mol) 12.2 grams 15.1 grams 24.4 grams 30.2 grams

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5