How many kpa are in 2,150 mmhg?
a. 2.83kpa
b. 287kpa
c. 1.61 x 10^4 kpa
d. 2.18 x 10^5 kpa

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

Describe what happens to the molecules as water goes from ice to liquid to vapor. be sure to explain what happens to the temperature during the phase changes.

Describe at least two advantages and two disadvantages of using hydropower as a source of energy.