Laboratory Experiments For Chemistry: The Central Science, Si Edition
Laboratory Experiments For Chemistry: The Central Science, Si Edition
14th Edition
ISBN: 9781292221335
Author: Theodore E. Brown
Publisher: PEARSON
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Question
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Chapter 10, Problem 1DE

(a)

Interpretation Introduction

To determine: The number of significant figures that are reported to determine the molar mass of gas.

(a)

Expert Solution
Check Mark

Answer to Problem 1DE

Solution: The molar mass of the gas is reported up to 1 significant figure to identify the given noble gas.

Explanation of Solution

The given unknown gas is a noble gas and the difference in molar masses of noble gases is much larger. If the molar mass of unknown gas is reported correctly up to only one significant figure then it would be easily identified.

Conclusion

The molar mass of the gas is reported up to 1 significant figure to identify the given noble gas.

(b)

Interpretation Introduction

To determine: The experiment that could help in determining the molar mass of unknown gas and the tools, assumptions and the calculations used in the experiment.

(b)

Expert Solution
Check Mark

Answer to Problem 1DE

Solution: The experiment that could help in determining the molar mass of unknown gas and the tools, assumptions and the calculations used in the experiment are as follows.

Explanation of Solution

The experiment that could help in determining the molar mass of unknown gas is as follow.
Mass of the empty mylar balloon is measured by the analytical balance. The balloon is then filled with unknown gas and is stored in a 100mL beaker, before this mass of empty 100mL beaker is measured. Add more and more filled balloons until the balloons reaches to the mark of 100mL . Then, weigh this balloon filled beaker using analytical balance and subtract the weight of empty balloons and the empty beaker.
The density of the gas is calculated as,

    d=mV

Where,

  • dis the density of the gas.
  • m is the mass of the unknown gas.
  • V is the volume of the beaker.

It is assumed in the above equation that the volume occupied by the balloons is negligible.

The molar mass of the unknown gas is determined by the formula,

    d=P×MR×T

Where,

  • dis the density of the gas.
  • P is the pressure of the gas.
  • R is the gas constant.
  • Tis the temperature at which experiment performed.
  • M is the molar mass of gas.

It is assumed that the gas is ideal in nature and with the help of above formula the molar mass of the unknown gas can be determined.

Conclusion

Conclusion:

The tools used in the experiment are analytical balance, mylar balloons and 100mL beaker.
The assumptions used in the experiment are volume of the balloons is taken as negligible and the gas is assumed to be ideal.
The formula used in the experiment for determining molar mass is,

    d=P×MR×T

(c)

Interpretation Introduction

To determine: The experimental method that is used to identify the given unknown gas.

(c)

Expert Solution
Check Mark

Answer to Problem 1DE

Solution: The unknown gas can be identified on the basis of its molar mass.

Explanation of Solution

The unknown gas can be identified by determining its molar mass. The molar mass is determined by the instrument that has a gas jar filled with water that is connected to the bend tubes. As the gas is collected in the jar filled with water, the water level comes down. The volume is calculated by the volume of the gas jar and the mass is calculated by weighing the empty gas jar and filled gas jar.

The molar mass can be calculated by the formula,

    mV=P×MR×T

Where,

  • mis the mass of the gas.
  • V is the volume of the gas.
  • P is the pressure of the gas.
  • R is the gas constant.
  • Tis the temperature at which experiment performed.
  • M is the molar mass of gas.

The pressure of the gas is measured from the barometer.

Conclusion

The unknown gas can be identified by determining its molar mass with the help of the formula,
mV=P×MR×T

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Chapter 10 Solutions

Laboratory Experiments For Chemistry: The Central Science, Si Edition

Ch. 10.4 - Prob. 10.6.1PECh. 10.4 - Prob. 10.6.2PECh. 10.5 - Prob. 10.7.1PECh. 10.5 - Prob. 10.7.2PECh. 10.5 - Prob. 10.8.1PECh. 10.5 - Prob. 10.8.2PECh. 10.5 - Prob. 10.9.1PECh. 10.5 - Prob. 10.9.2PECh. 10.6 - Prob. 10.10.1PECh. 10.6 - Prob. 10.10.2PECh. 10.6 - Prob. 10.11.1PECh. 10.6 - Prob. 10.11.2PECh. 10.7 - Prob. 10.12.1PECh. 10.7 - Prob. 10.12.2PECh. 10.8 - Fill in the blanks for the following statement:...Ch. 10.8 - Prob. 10.13.2PECh. 10.8 - Prob. 10.14.1PECh. 10.8 - Prob. 10.14.2PECh. 10.9 - Calculate the pressure of a 2975-mol sample of N2...Ch. 10.9 - Prob. 10.15.2PECh. 10 - Prob. 1DECh. 10 - Prob. 1ECh. 10 - Prob. 2ECh. 10 - Consider the sample of gas depicted here_ What...Ch. 10 - Imagine that the reaction 2CO(g)+O2(g)2CO(g)...Ch. 10 - Suppose you have a fixed amount of an ideal gas at...Ch. 10 - Prob. 6ECh. 10 - Prob. 7ECh. 10 - Prob. 8ECh. 10 - Prob. 9ECh. 10 - Prob. 10ECh. 10 - 10.11 A thin glass tube 1 m long is filled with...Ch. 10 - 10.12 The graph below shows the change in...Ch. 10 - Prob. 13ECh. 10 - Prob. 14ECh. 10 - Prob. 15ECh. 10 - Prob. 16ECh. 10 - Prob. 17ECh. 10 - a. The compound 1-iodododecane is a nonvolatile...Ch. 10 - Prob. 19ECh. 10 - Prob. 20ECh. 10 - Prob. 21ECh. 10 - Prob. 22ECh. 10 - Prob. 23ECh. 10 - Prob. 24ECh. 10 - You have a gas at 25C confined to a cylinder with...Ch. 10 - Prob. 26ECh. 10 - Prob. 27ECh. 10 - Nitrogen and hydrogen gases react to form ammonia...Ch. 10 - 10.29 a. What conditions are represented by the...Ch. 10 - Prob. 30ECh. 10 - Prob. 31ECh. 10 - Prob. 32ECh. 10 - Prob. 33ECh. 10 - Prob. 34ECh. 10 - Prob. 35ECh. 10 - Prob. 36ECh. 10 - Calculate the number of molecules in deep breath...Ch. 10 - If the pressure exerted by ozone, O3, in the...Ch. 10 - A scuba diver’s tank contain 0.29 kg of O2...Ch. 10 - Prob. 40ECh. 10 - Prob. 41ECh. 10 - Prob. 42ECh. 10 - Chlorine is widely used to purify municipal water...Ch. 10 - Many gases are shipped in high-pressure...Ch. 10 - Prob. 45ECh. 10 - Prob. 46ECh. 10 - Rank the following gases from least to denser at...Ch. 10 - Prob. 48ECh. 10 - Prob. 49ECh. 10 - Prob. 50ECh. 10 - Prob. 51ECh. 10 - Prob. 52ECh. 10 - Prob. 53ECh. 10 - Prob. 54ECh. 10 - Magnesium can be used as a ‘getter” in evacuated...Ch. 10 - Prob. 56ECh. 10 - The metabolic oxidation of glucose, C6H12O6, in...Ch. 10 - Prob. 58ECh. 10 - Prob. 59ECh. 10 - Prob. 60ECh. 10 - Consider the apparatus shown in the following...Ch. 10 - Prob. 62ECh. 10 - A mixture containing 0.75 mol He(g), 0.330 mol...Ch. 10 - A deep-sea diver uses a gas cylinder with a volume...Ch. 10 - Prob. 65ECh. 10 - Prob. 66ECh. 10 - Prob. 67ECh. 10 - Prob. 68ECh. 10 - Prob. 69ECh. 10 - Prob. 70ECh. 10 - Prob. 71ECh. 10 - Prob. 72ECh. 10 - Prob. 73ECh. 10 - Prob. 74ECh. 10 - Prob. 75ECh. 10 - Indicate which of the following statement...Ch. 10 - Prob. 77ECh. 10 - Prob. 78ECh. 10 - Prob. 79ECh. 10 - Suppose you have two 1-L flasks, one containing N2...Ch. 10 - Prob. 81ECh. 10 - 10.8 Place the following gases in order of...Ch. 10 - Prob. 83ECh. 10 - Prob. 84ECh. 10 - Prob. 85ECh. 10 - Prob. 86ECh. 10 - Prob. 87ECh. 10 - Prob. 88ECh. 10 - Prob. 89ECh. 10 - Prob. 90ECh. 10 - Prob. 91ECh. 10 - Prob. 92ECh. 10 - Prob. 93ECh. 10 - Prob. 94ECh. 10 - Prob. 95ECh. 10 - Prob. 96ECh. 10 - Prob. 97AECh. 10 - A gas bubble with a volume of 1.0 mm3 originates...Ch. 10 - A 15.0-L tank is filled with helium gas at a...Ch. 10 - Prob. 100AECh. 10 - Prob. 101AECh. 10 - Prob. 102AECh. 10 - Prob. 103AECh. 10 - Prob. 104AECh. 10 - Prob. 105AECh. 10 - Prob. 106AECh. 10 - Prob. 107AECh. 10 - Prob. 108AECh. 10 - Prob. 109AECh. 10 - The density of gas of unknown molar mass was...Ch. 10 - A glass vessel fitted with a stopcock valve has a...Ch. 10 - Prob. 112AECh. 10 - 10.113 consider the following gases. All at STP:...Ch. 10 - Prob. 114AECh. 10 - Prob. 115AECh. 10 - Prob. 116AECh. 10 - Prob. 117AECh. 10 - Prob. 118IECh. 10 - Prob. 119IECh. 10 - Prob. 120IECh. 10 - 10.121 A 4.00-g sample of a mixture of CaO and...Ch. 10 - Prob. 122IECh. 10 - Prob. 123IECh. 10 - Chlorine dioxide gas (CIO2) is used as a...Ch. 10 - Natural gas is very abundant in many Middle...Ch. 10 - Prob. 126IECh. 10 - Prob. 127IE
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