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Calculate the molar mass of the following substances. (a) Ethy

Science

Class 9

NCERT

Chapter 1: Matter in Our Surroundings

9 questions

Chapter 2: Is Matter Around Us Pure?

13 questions

Chapter 3: Atoms and Molecules

16 questions

Give the names of the elements present in the following compounds.

(a)

Quick lime

(b)

Hydrogen bromide

(c)

Baking bromide

(d)

Potassium sulphate.

Calculate the molar mass of the following substances.

(a)

Ethyne,

C_{2} H_{2}

(b)

Sulphur molecule,

S_{8}

(c)

Phosphorus molecule,

P_{4}

(Atomic mass of phosporus

= 31

)

(d)

Hydrochloric acid,

H Cl

(e)

Nitric acid,

H N O_{3}

What is the mass of:

(a)

1

mole of nitrogen atoms?

(b)

4

moles of aluminium atoms(Atomic mass of aluminium

= 27)?

(c)

10

moles of sodium sulphite

(N a_{2} S O_{3})?

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Question

Easy

Solving time: 3 mins

Calculate the molar mass of the following substances.
$(a)$ Ethyne, $C_{2} H_{2}$
$(b)$ Sulphur molecule, $S_{8}$
$(c)$ Phosphorus molecule, $P_{4}$ (Atomic mass of phosporus $= 31$ )
$(d)$ Hydrochloric acid, $H Cl$
$(e)$ Nitric acid, $H N O_{3}$

Views: 6,912 students

Updated on: Apr 20, 2023

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Science (NCERT)

Found 3 tutors discussing this question

James Discussed

Calculate the molar mass of the following substances.

(a)

Ethyne,

C_{2} H_{2}

(b)

Sulphur molecule,

S_{8}

(c)

Phosphorus molecule,

P_{4}

(Atomic mass of phosporus

= 31

)

(d)

Hydrochloric acid,

H Cl

(e)

Nitric acid,

H N O_{3}

6 mins ago

Discuss this question LIVE

6 mins ago

Text solutionVerified

(a) Ethyne (

C_{2} H_{2}

) = 2xmass of atom +2xmass of H Atom =2x12+2x1=26 g/mol
(b) Sulphur dioxide(

S_{8}

)= 8xmass of sulphur atom =8x32=256g/mol
(c)

P_{4}

= 4xMass of P atom =4x31 =124g/mol
(d) HCL = 1x Mass of H atom+1xmass of Cl atom= 1+35.5 =36.5g/mol
(e)

H N O_{3}

=1x mass of H atom +1x mass of N atom +3x Mass of O atom =1x1+1x14+3x16 = 63g/mol

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Practice more questions from Science (NCERT)

Give the names of the elements present in the following compounds.

(a)

Quick lime

(b)

Hydrogen bromide

(c)

Baking bromide

(d)

Potassium sulphate.

Calculate the molar mass of the following substances.

(a)

Ethyne,

C_{2} H_{2}

(b)

Sulphur molecule,

S_{8}

(c)

Phosphorus molecule,

P_{4}

(Atomic mass of phosporus

= 31

)

(d)

Hydrochloric acid,

H Cl

(e)

Nitric acid,

H N O_{3}

What is the mass of:

(a)

1

mole of nitrogen atoms?

(b)

4

moles of aluminium atoms(Atomic mass of aluminium

= 27)?

(c)

10

moles of sodium sulphite

(N a_{2} S O_{3})?

View all

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Question Text	Calculate the molar mass of the following substances. $(a)$ Ethyne, $C_{2} H_{2}$ $(b)$ Sulphur molecule, $S_{8}$ $(c)$ Phosphorus molecule, $P_{4}$ (Atomic mass of phosporus $= 31$ ) $(d)$ Hydrochloric acid, $H Cl$ $(e)$ Nitric acid, $H N O_{3}$
Updated On	Apr 20, 2023
Topic	Atoms and Molecules
Subject	Science
Class	Class 9
Answer Type	Text solution:1 Video solution: 43
Upvotes	4174
Avg. Video Duration	6 min

Calculate the molar mass of the following substances.
$(a)$ Ethyne, $C_{2} H_{2}$
$(b)$ Sulphur molecule, $S_{8}$
$(c)$ Phosphorus molecule, $P_{4}$ (Atomic mass of phosporus $= 31$ )
$(d)$ Hydrochloric acid, $H Cl$
$(e)$ Nitric acid, $H N O_{3}$

Text solutionVerified

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Calculate the molar mass of the following substances.(a) Ethyne, C2​H2​(b) Sulphur molecule, S8​(c) Phosphorus molecule, P4​(Atomic mass of phosporus =31)(d) Hydrochloric acid, HCl(e) Nitric acid, HNO3​

Text solutionVerified

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Calculate the molar mass of the following substances.
$(a)$ Ethyne, $C_{2} H_{2}$
$(b)$ Sulphur molecule, $S_{8}$
$(c)$ Phosphorus molecule, $P_{4}$ (Atomic mass of phosporus $= 31$ )
$(d)$ Hydrochloric acid, $H Cl$
$(e)$ Nitric acid, $H N O_{3}$