AP Chemistry - cyclohexane

2. Consider the molecule cyclohexane, which contains only hydrogen and carbon atoms. a) When a sample is burned in oxygen, 4.822 g of CO(2) and 1.650g of H(2)O are obtained. What is its simplest formula? b) Calculate the mass percent of carbon and hydrogen in cyclohexene. c) How many grams of carbon would you obtain from 3.87g of sample? d) The molar mass of cyclohexane is 82.10g/mol. What is its molecular formula? e) Write and balance the equation for the reaction between liquid cyclohexane and oxygen forming carbon dioxide.

AP Chemistry

Consider the reaction. Mn3N2 (s) +H2O (l) → Mg(OH)2 (s) + NH3 (g) a) Balance the equation and name each compound. b) How many moles of Mg(OH)2 are produced from .319 mol of magnesium nitride? c) How many grams of water are necessary to produce 4.39 mol of ammonia? d) If 12.48g of magnesium hydroxide are formed, how many grams of ammonia are produced? -Start with 2.95g of magnesium nitride and 1.500g of water. a) What is the limiting reactant? b) How many grams of magnesium hydroxide can be theoretically obtained? c) If only 2.009g of magnesium hydroxide are obtained, what is the percent yield of the reaction?

Calculate the mass of material required if 1000 calories of energy causes a change from

Calculate the mass of material required if 1000 calories of energy causes a change from -27ºF to 91ºC and the specific heat capacity is 0.25 joules/gram-degree C. The distance planet Inverse has a unique temperature scale. Their degree is not equivalent of our Celsius degree; they measure the freezing point of water as 100 ºI and the boiling point of water as -100ºI. Determine the relationship to convert ºC to ºI and ºI to ºC. Knowing that the specific heat capacity of gold is 0.13 joules/gram-deg C, if a 37.5 pound sample of gold is warmed from 22.1ºC to 85.2 ºC, how many calories of energy does the gold absorb? Mercury has a density of 13.6 grams/CM3. If 52.4 grams of... click for more

AP Chemistry Test Review.

1. Consider ammonia gas (NH3), which is produced by reacting nitrogen gas and hydrogen gas. a. Write a balanced equation for the reaction. b. A one-liter flask contains 0.20 nol of nitrogen at room temperature and 1.5 atm pressure. Another 1.0-L flask contains 0.60 mol of hydrogen at the same room temperature. What is the pressure of the hydrogen gas? c. The same gases in Problem 2 are combined and put into a 3.0-L flask. The gas mixture exerts a total pressure of 6.0 atm. What temperature does the gas mixture have? d. The ammonia produced by reacting .200 mol of nitrogen and .600 mol of hydrogen is measured to be 5.0 L at 27(degree)C and one atm. How many moles of nitrogen were used ... click for more

AP Chemistry: Charles Law Concept Questions.

I included Charles law lab preocedures for reference and questions are in MS words format. (See attached files for full problem description) --- 1. When the flask is submerged in the boiling water, what is happening to the gas inside the flask? 2. Compare the pressure of the gas outside the flask with the pressure of the gas inside the flask once the gas inside the flask reaches the temperature of the boiling water? 3. Why did the water enter the flask when it went from a high temperature to a lower temperature? 4. What is the relationship between the volume of the water entering the flask and the volume decrease of the gas inside the flask? Explain. 5. Why were the water levels ... click for more