3.00 L of a gas is collected at 35.0°C and 705.0 mmHg. What is the volume at STP? Group of answer choices 2.55 L

Question

3.00 L of a gas is collected at 35.0°C and 705.0 mmHg. What is the volume at STP?
Group of answer choices

2.55 L

1.65 L

2.47 L

3.10 L

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Thu Nguyệt 3 years 2021-08-23T12:34:38+00:00 1 Answers 4 views 0

Answers ( )

  1. RobertKer
    0
    2021-08-23T12:36:20+00:00
    Reply

    Answer:

    2.47L

    Explanation:

    Using the combined gas law equation as follows:

    P1V1/T1= P2V2/T2

    Where;

    P1 = initial pressure (mmHg)

    P2 = final pressure (mmHg)

    V1 = initial volume (L)

    V2 = final volume (L)

    T1 = initial temperature (K)

    T2 = final temperature (K)

    According to the information provided in this question;

    P1 = 705mmHg

    P2 = 760mmHg (STP)

    V1 = 3.00L

    V2 = ?

    T1 = 35°C = 35 + 273 = 308K

    T2 = 273K (STP)

    Using P1V1/T1= P2V2/T2

    705 × 3/308 = 760 × V2/273

    2115/308 = 760V2/273

    Cross multiply

    308 × 760V2 = 2115 × 273

    234,080V2 = 577,395

    V2 = 577,395 ÷ 234,080

    V2 = 2.47L

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