Question

In: Chemistry

Question 19 If 0.75 mole of helium gas occupies a volume of 1.5 L, what volume...

Question 19

If 0.75 mole of helium gas occupies a volume of 1.5 L, what volume (in liters) will 1.2 moles of helium occupy at the same temperature and pressure?

A.
2.4 L

B.
1.8 L

C.
0.94 L

D.
3.6 L

Question 20

A solution is made by dissolving 3.33 g of HCl(g) in 40.0 g of liquid methyl alcohol (CH3OH). Identify the solute in the resulting solution.

A.
methyl alcohol

B.
HCl

C.
both A and B

D.
none of the above

Question 13

Molality is defined as

A.
moles of solute per liter of solution

B.
moles of solute per kilogram of solvent.

C.
grams of solute per grams of solvent.

D.
kilograms of solute per liter of solution.

Question 14

The pressure in a tire is 2.00 atm. What is this pressure in millimeters of mercury?

A.
2.00 mmHg

B.
1520 mmHg

C.
0.00263 mmHg

D.
760 mmHg

Question 16

What is the molarity of 0.500 L of NaOH solution if it contains 6.00 g of NaOH

A.
0.0750 M

B.
0.300 M

C.
12.0 M

D.
none of the above

Question 17

A 0.0997 mol sample of O₂ has a pressure of 0.692 atm and a temperature of 333 K. What is its volume?

A.
2.78 L

B.
3.94 L

C.
25.0 L

D.
12.8 L

Question 18

A sample of oxygen gas has a volume of 420 mL at a temperature of 18 °C. At what temperature (in degrees Celsius) will the volume of the oxygen be 640 mL? (P and n are constant.)

A.
443 K

B.
−82 °C

C.
170°C

D.
none of the above.

Expert Solution

queen_honey_blossom answered 2 years ago

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