Mass is ___. A. the length of an atom's nucleus
B. the center of a compound
C. another name for mixtures that go together
D. the amount of matter in an object

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

An observation that requires measurement is called quantitative observable or qualitative

What type of matter is made of only one kind of atom