One mole of copper equals about how many atoms?
a. 16 atoms
b. 6000 atoms
c. 6.02 ×1023 atoms
d. 1.66 ×10-22 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

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

Building glycogen from glucose molecules is an example of