The following questions will help you review for the test. Here are the answers for you to check your work:
#1 molar mass = 134.0 g, 5.6 e21 molecules C4H6O5
#2 molar mass= 90.0 g, 538.2 g H2C2O4
#3 a. molar mass = 121.1 grams H7SC3N1O2
b. 26.5 % S
c. 1.24 moles of H7SC3NO2
d.
answer 1.50g H7SC3NO2 x 1 mol H7SC3NO2 7mol H 6.02 e23 atoms H
------------------------- -------------------------------- x --------------------------- x ---------------------- =
1 121.0 g H7SC3NO2 1mol H7SC3NO2 1 mole H
5.22e22 H7SC3NO2
#4 22.4 L
#5. 1.96 g/L N2O
#6) molar mass=80.0grams, 35%N, 5%H, 60%O
#7) molar mass=52.84g, 10.1%C, .8%H, 60%Cl
#8) .25 mol C, .26mol H, .76mol I, CHI3
#9) 3.41 mol C, 4.58molH, 3.41molO; C3H4O3; n=2 C6H8O6 (molecular)
#10 omit