Methane gas, ch4, effuses through a barrier at a rate of 0.147 ml/minute. if an unknown gas effuses through the same barrier at a rate of 8.87e-2 ml/minute, what is the molar mass of the gas?

What effect does nuclear radiation have on atoms?

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

The formation of a solid, also known as a is an indication of a chemical change. precipitate particulate particle powder