CHEMISTRY -content– 1. Proxima Centauri is the nearest star other than or own Sun. It is located at a distance of 3.98 X 10^13 km from us. About how many minutes does it take light from Proxima Centauri to reach us? (Speed of light=3.00 X 10^8 m/s). (A) 200000000000 min. (B) 133000000 min. (C) 7960000 min. (D) 2210000 min. (E)11900000000000000000000 min. 2. What is the mass of snow (in tons) on a 150.0ft by 45.0ft flat roof after a 6.0 inch snowfall? Assume that 11 inches of snow is equivalent to 1.0 inches of water. The density of water is 1.00 g/ml. (A) 307 tons (B) 3300 tons (C) 0.010 tons (D) 9.6 tons (E) 1300 tons 3. Assuming that there are 20. Drops in 1.0 ml, how many drops are in a 5.0 quarts water cooler? (A) 95000 drops (B) 9460 drops (C) There is no correct answer is listed for this problem. (D) 94600 drops (E) 9500 drops 4. A waterbed filled with water has the dimensions 8.5ft by 7.5ft by 9.5inches. Taking the density of water to be 1.00 g/cubic centimeter, determine the number of pounds of water required to fill the water bed. (A) 3559 lbs (B) 117 lbs (C) 3500 pounds (D) 3121.97 pounds (E) 3100 or 3200 lbs (depends on the conversion factors used) 5. A chemical plant releases 5.00 tons of gas into the atmosphere each day. The gas contains 5.00% by mass of sulfur dioxide (for every 100 parts by mass of gas, 5 parts are sulfur dioxide). What mass of sulfur dioxide is released in a period of one week? (A) 1.75 tons/week (B) 0.250 tons/week (C) 700. tons/week (D) 100. tons/week (E) 5.00 tons/week 6. What volume of mercury (density=13.6 g/ml) will 0.23 grams occupy? (A) There is no correct answer listed for this problem (B) 3.2 ml (C) 59 ml (D) 0.0169 ml (E) 0.017 cubic centimeter 7. A constant used in chemistry is the gas constant, 8.314 J/K. Express the value of this constant in calories per degrees kelvin. Hint: 4.184J=1.000 calorie. (A) 1.987 cal/K (B) 0.5032 cal/K (C) There is no correct answer listed for this problem (D) 34.79 cal/K (E) 8.314 cal/K PLACE THIS ORDER OR A SIMILAR ORDER WITH US TODAY AND GET A GOOD DISCOUNT

2016-09-21