Use the needed for this question.
How many grams of Al are there in a
sample of Al that contains the same
number of moles as a 40.4 gram sample
of Se?
grams of AI

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 number at the end of an isotope’s name is the number.

Is 9 correct? and can someone me with 10? it’s due tomorrow, you