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# a gas cylinder is filled with hydrogen and it holds 5 gms of gas. the same cylinder holds 85 gms of gas x under same temperature and pressure. calculate the vapour density of gas x.

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### Mohammed

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## A gas cylinder filled with hydrogen holds 5gof the gas The same cylinder holds 85gof gas Xunder the same temperature and pressureCalculate molecular weight of gasX

Vapour density may be defined as the ratio between the mass of a certain volume of a substance with the mass of the same volume of hydrogen under the same conditions of temperature and pressure Therefore vapour densityVDMassofacertainvolumeofgasXundersimilarconditionsMassofanequalvolumeofhydrogenundersimilarconditions85517 The relativemolecular mass of a gas or vapour is twice its vapour density Therefore molecular mass2VD21734

Selina Icse Concise Chemistry For Class 10>Mole Concept and Stoichiometry>MISCELLANEOUS EXERCISE>Q 10

EASY Earn 100

A gas cylinder filled with hydrogen holds

5 g

of the gas. The same cylinder holds

85 g of gas X

under the same temperature and pressure. Calculate molecular weight of gas

X .

Vapour density may be defined as the ratio between the mass of a certain volume of a substance with the mass of the same volume of hydrogen under the same conditions of temperature and pressure.

Therefore, vapour density,

V.D=Mass of a certain volumeof gas X under similar conditionsMass of an equal volume of hydrogen under similar conditions=855=17

.

The relative molecular mass of a gas or vapour is twice its vapour density.

Therefore, molecular mass

=34 .

## Important Questions on Mole Concept and Stoichiometry

EASY

Selina Icse Concise Chemistry For Class 10>Mole Concept and Stoichiometry>MISCELLANEOUS EXERCISE>Q 11

When carbon dioxide is passed over red-hot carbon, carbon monoxide is produced according to the equation:

CO2+C→                 2CO

What volume of carbon monoxide at

STP

can be obtained from

3 g of carbon? EASY

Selina Icse Concise Chemistry For Class 10>Mole Concept and Stoichiometry>MISCELLANEOUS EXERCISE>Q 11

60 cm3

24 cm3

of carbon monoxide and mixture ignited. Calculate the volume of oxygen used up.

EASY

Selina Icse Concise Chemistry For Class 10>Mole Concept and Stoichiometry>MISCELLANEOUS EXERCISE>Q 11

60 cm3

24 cm3

of carbon monoxide and mixture ignited. Calculate the volume of carbon dioxide formed.

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## A gas cylinder filled with hydrogen holds 5 g of the gas. The same cylinder holds 85 g of a gas X, under the same temperature and pressure. Calculate the vapour density and mol. wt. of the gas X.

(17, 34)A gas cylinder filled with hydrogen holds 5 g of the gas. The same cylinder holds 85 g of a gas X, under the same temperature and pressure. Calculate the vapour density and mol. wt. of the gas X.

A gas cylinder filled with hydrogen holds 5 g of the gas. The same cylinder holds 85 g of a gas X, under the same temperature and pressure. Calculate the vapour density and mol. wt. of the gas X.

ICSE-MOLE CONCEPT AND STOICHIOMETRY-ADDITIONAL QUESTIONS FOR PRACTICE

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Updated On: 27-06-2022

लिखित उत्तर Solution (17, 34) उत्तर

Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams.

Transcript

hello everyone the question is with hydrogen hole we have to calculate the it is the cylinder have temperature and to calculate the vapour density in the vapour density is

equals to mass of gas at STP mass of gas by mass of the equal volume of H2 equal volume because law they will equal number of moles and equal volume so we can write excise day so the mass of gas x xx STP is 85 and mass of equal volume of H2O is the

vapour density now moving onto the molecular weight both of them happy same condition of temperature and pressure both the gases have temperature they will follow Polo

law which state that they will have number of moral aur so find out the number of moles of hydrogen number of mood off hydrogen is equals to number of moles of X so this can be written as

number of moles of hydrogen is given mass is 5 gram upon molecular weight of hydrogen the molecular weight and molecular weight of so on molecular weight of 85 into 2 by 5 it will be 17

into two equal to 34 G so the molecular weight the molecular weight density o 34 gram and 17 respectively who you all understood it

thank you संबंधित वीडियो BOOK - ICSE

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EXERCISE - Questions from Previous ICSE Board Papers

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CHAPTER - ORGANIC CHEMISTRY

EXERCISE - QUESTIONS FOR PRACTICE PAPER ON EXAMINATION PATTERN (ANSWER THE QUESTIONS)

40 videos ORGANIC CHEMISTRY

A Cylinder contains 0.32 g of oxygen. The same volume of an unknown gas 'X' under similar conditions of temperature and pressure weighs 0.26 g. The gas 'X' is known the contain only carbon and hydrogen atoms in the ratio 1 : 1. Identify the gas 'X'.

30708276 Text Solution

Vapour density of a compound is defined as the ratio of mass of a certain volume of gas to the mass of the same volume of hydrogen gas under conditions of temperature and pressure. Vapour density =("Mass of certain of gas"(22.4L)"at STP")/("Mass of same volume of" H_(2) "gas"(22.4L)"at STP") =(Mw)/(2) i.e., Molecular mass of gas=Vapour density xx2 Vapour density is a unitless quantity it is unaffected by variation of temperature and pressure. At STP, 5.6 litre of a gas weighs 60g. the vapour density of gas is:

142037042 Text Solution

Under same conditions of temperature and pressure the vapour density of an elementary gas is 5 times than that of oxygen. Calculate the relative atomic mass of the gas if it is diatomic in nature.

160816736 02:53

A spherical balloon with a diameter of 21 cm is to be filled with hydrogen gas at STP from a cylinder of

H 2

gas at 20 atm pressure and

27 ∘ C

. If the cylinder can hold 2.82 L of water, how many balloon can be filled with the hydrogen gas from the cylinder?

160818982 06:26 A V d m 3 flask contains gas A

2 V d m 3 contains gas B

at the same temperature If density of gas

A is 3.0 g d m − 3 and of gas B is 1.5 g d m − 3 and mo1 wt of A = 1 / 2 wt pf B

then the ratio of pressure exerted by gases is .

357197257 03:00 A V d m 3 flask contains gas A

2 V d m 3 contains gas B

at the same temperature If density of gas

A is 3.0 g d m − 3 and of gas B is 1.5 g d m − 3 and mo1 wt of A = 1 / 2 wt pf B

then the ratio of pressure exerted by gases is .

357197266 03:00

प्रारम्भ में एक पात्र में 1 g गैस A एक नियत ताप पर 4 atm दाब रखती है, यदि समान ताप पर उसी पात्र में 2 g गैस B मिला दी जाए तो दाब 6 atm हो जाता है तो A तथा B के अणुभार का अनुपात होगा :

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## A Gas Cylinder Filled with Hydrogen Holds 5g of the Gas. the Same Cylinder Holds 85 G of Gas X Under the Same Temperature and Pressure. Calculate : Vapour Density of Gas X.

A Gas Cylinder Filled with Hydrogen Holds 5g of the Gas. the Same Cylinder Holds 85 G of Gas X Under the Same Temperature and Pressure. Calculate : Vapour Density of Gas X.

A gas cylinder filled with hydrogen holds 5g of the gas. The same cylinder holds 85 g of gas X under the same temperature and pressure. Calculate :

Vapour density of gas X.

### SOLUTION

V.D = mass of gas at STP

mass of the equal volume ofH

mass of gas at STPmass of the equal volume of  H2=855=17

Concept: Relationship Between Vapour Density and Relative Molecular Mass

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Chapter 5: Mole concept and Stoichiometry - Miscellaneous Exercises [Page 95]

Q 10.1 Q 9 Q 10.2

### APPEARS IN

Selina Concise Chemistry Class 10 ICSE

Chapter 5 Mole concept and Stoichiometry

Miscellaneous Exercises | Q 10.1 | Page 95

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Mohammed 3 day ago

Guys, does anyone know the answer?