Question

If () = − 2 , () = 2 − , then find + , × and f/g​

Answer 1

Answer:

here is some q hope its help u

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