R-0.0821 atm*L /mol K R-62.36 Torr\"L /mol·K MULTIPLE CHOICE. Choose the one alt

Question

R-0.0821 atm*L /mol K R-62.36 Torr"L /mol·K MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) If a piston compresses air in a steel cylinder, what happens in the cylinder? 1) A) the volume increases, and the pressure decreases B) the volume increases, and the pressure increases C) the volume decreases, and the pressure decreases D) the volume decreases, and the pressure increases E) none of the above 2) A 5.00 L volume of air is cooled from 298 K to 149 K. If the pressure remains constant, what is 2) the final volume in liters? A) 2.50L B) 10.0L C) 5.46L D) 4.58 L E) 5.00L 3) An unknown gas occupies a volume of 4.75 L at 1227 C and 5.00 atm. If the mass is 5.45 3) what is the molar mass of the gas? (R-0.0821 atm·L/mol*K) A) 28.3 g/mol B) 141 g/mol C)344 /mol D) 23.8 g/mol E)21.5g/mol 4) How many moles of methane occupy a volume of 2.00 L at 50.0°C and 0.500 atm? (R-0.0821 4) atm.L/mol K) A) 0.244 mol B) 0.151 mol C) 4.11 mol D) 0.0377 mol E) 26.5 mol

Explanation / Answer

1)

Since piston is compressed, the volume is decreasing

According to Boyles law, decreasing volume will increase pressure

Answer: D

average velocity or speed is same.

Don’t bother about them

15)

we have:

V1 = 5.00 L

T1 = 298.0 K

T2 = 149.0 K

we have below equation to be used:

V1/T1 = V2/T2

5.00 L / 298.0 K = V2 / 149.0 K

V2 = 2.5 L

Answer: A

Only 1 question at a time please

Related Questions

Navigate

• Browse (All)
• Browse R
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.