front 1 A student finds that a hydrate sample that initially has a mass of 1.6646 grams releases 0.4059 grams of water. What is the percentage of water in this hydrate? Express with the units % in the units box. | back 1 0.4059 / 1.6646 x 100 = 24.38% |
front 2 A hydrate has the formula F e (NO3)3 dot 4 H2O. What is the percentage of water in this hydrate? Express with units of % in the units box. | back 2 H - 1.01 x 8 = 8.08 O - 16.00 x 4 = 64 8.08 + 64 = 72.08 Fe - 55.85 x 1 = 55.85 N - 14.01 x 3 = 42.03 O - 16.00 x 9 = 144 55.85 + 42.03 + 144 = 241.88 + 72.08 = 313.96 72.08 / 313.96 x 100 = 22.96% |
front 3 During the heating of the crucible, at what distance (in inches) should the ring support be from the Bunsen burner?
| back 3 4-5 |
front 4 How many times will the crucible with the hydrate sample be heated and weighed?
| back 4 3 |