Chem Questions:?

Question

A) What is the percent mass of chlorine in carbon tetrachloride?

1) percent?

B) partscoretotalsubmissions1----0/42----0/4----2--A 300 Watt electric heater puts out 300 Joules of energy per second. If an ice cube weighing 50.2 grams at -9.5 ºC is placed on the heater, how long will it take for the ice to completely vaporize (turn to steam)?
The specific heat of ice is 2.03 J/gºC, the specific heat of water is 4.184 J/gºC.

1)Minutes?
2) What percent of the total energy is used to vaporize the water (to change it to steam)?

Answer 1

92.208 %

Time = 50.2*2.03*9.5 + 50.2*4.184*100 = 73.24 seconds.

95.59 %