Delta of combustion of the propane
Question: 3 grams of propane burns and warms 100 grams of water from 20 degrees Celsius to 100 degrees Celsius. What is the delta H of combustion of the propane. What is the sign (positive or negative) of delta H?
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Determine the vapour pressure of a solution at 55C that contains 34.2 g NaCl in 375 ml of water. The vapour pressure of pure water at 55C is 118.1 torr. Assume a solution density of 1.00 g/ml.
The student then titrates the oxalic acid solution with her sodium hydroxide solution. When the titration reaches the equivalence point, the student finds she has used 0.1265 L of sodium hydroxide solution. Calculate the molarity of the student's
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Calorie contents of nuts, A cashew nut was burned and determined to have an energy value of 3.5Cal/g. The amount of nut burned was 0.9933g. How many of these nuts would a 67kg person have to eat to ob
Calculate the change in enthalpy when 52.0g of Cr at 25 degrees celsius and 1 atm pressure is oxidized.
Question: A bag contains ten counters, of which six are red and four are green. A count is chosen at random; its colour is noted and it is replaced in the bag. A sound counter is then chosen at random. Find the probabilities that:
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