A or B or C or D, plz answer fassttt

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

Sugar is dissolved in water. which is the solute? sugar neither both water

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.