Activities 1)Calculate a molar mass of the following substances. Use the data from the attached periodic table.

a) CH4 (Example) = 12 u = 1 u 4 = 12 u + 1 u x 4 = 16 u = 16 g / mol b) C2H6O2

c) Ca3 (PO4) 2

d) FeCl2 ‧2H2O

Which of these expressions are correct variations of the combined gas law? p1v1t2 = p2v2t1 both

When 13.3 g koh is dissolved in 102.7 g of water in a coffee-cup calorimeter, the temperature rises from 21.4 °c to 31.53 °c. what is the enthalpy change per gram of koh (j/g) dissolved in the water? * take the density of water as 1.00 g/ml. * assume that the solution has a specific heat capacity of 4.18 j/g*k. enter to 1 decimal place. do not forget the appropriate sign /(+). canvas may auto-delete the (+) sign

How will the volume of a gas be affected if the pressure is tripled, but the temperature remains the same?