if alpha and beta are the zeroes of x2-6(x+1)-psuch that alpha + 1 beta +1 =0

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1. Answer:

   Choose the most correct answer

   1. A sample of oxygen occupies 47.2 liters under a pressure of 1240 torr at 25oC. What volume would it occupy at 25oC if

   the pressure were decreased to 730 torr?

   a) 27.8 L

   b) 29.3 L

   c) 32.3 L

   d) 80.2 L

   2. Under conditions of fixed temperature and amount of gas, Boyle’s law requires that

   I. P1V1 = P2V2

   II. PV = constant

   III. P1/P2 = V2/V1

   a) I only

   b) II only

   c) III only

   d) I, II, and III

   3. The volume of a sample of nitrogen is 6.00 liters at 35oC and 740 torr. What volume will it occupy at STP?

   a) 6.59 L

   b) 5.46 L

   c) 6.95 L

   d) 5.18 L

   4. The density of chlorine gas at STP, in grams per liter, is approximately:

   a) 6.2

   b) 3.2

   c) 3.9

   d) 4.5

   Explanation: d = molar mass × p/ RT = 70 × 1/ 0.082× 273 = 3.17 g/L

   5. What pressure (in atm) would be exerted by 76 g of fluorine gas in a 1.50 liter vessel at -37oC?

   a) 26 atm

   b) 4.1 atm

   c) 19,600 atm

   d) 84 atm

   6. What is the density of ammonia gas at 2.00 atm pressure and a temperature of 25.0oC?

   a) 0.720 g/L

   b) 0.980 g/L

   c) 1.39 g/L

   d) 16.6 g/L

   7. Convert 2.0 atm to mmHg

   a) 150 mmHg

   b) 0.27 mmHg

   c) 150 mmHg

   d) 1520 mmHg

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