reviewfinal

# reviewfinal - 1 Chlorine has two isotopes Cl-35(mass 34.968...

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Chlorine has two isotopes, Cl-35 (mass 34.968 amu), and Cl-37 (mass 36.954 amu). What is the percent composition of each isotope? 2. Gold has a density of 19.3 . What is the length of the side of a cube of gold which has a mass of 50.0 g 3. How many molecules of CO 2 would come from the combustion of 0.500 moles of hexane? 4. How many chlorine atoms are in 5.00 g of aluminum chloride? 5 . What volume of H 2 , measured at 25 o C and 1.00 atm, would come from the reaction of 1.50 mol Mg and 4.00 L of 0.600 M HCl? 6. 1.50 g of a gas occupies 275 mL at a pressure of 720 Torr and a temperature of 20.0 o C. What is the molar mass of the gas? 7. 2NO(g) + O 2 (g) → 2NO 2 (g) Reaction occurs in a 5.00 L container at 298 K. Start with 1.20 mol NO and 1.00 mol O 2 , and the reaction proceeds as far as possible. What is the final pressure in the container? 8. CH 4 + 2O 2 → CO 2 + 2H 2 O H = -890 kJ Heat released from burning 0.750 g of CH 4 is used to heat up 250 g of H 2 O starting at initial temperature 20.0 o C. What is the final temperature? Specific heat of water:

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reviewfinal - 1 Chlorine has two isotopes Cl-35(mass 34.968...

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