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Calculate the number of particles in each of the following: (i

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

Calculate the mass of the following:
(i)

0.5

mole of

N_{2}

gas (mass from mole of molecule)
(ii)

0.5

mole of

N

atoms (mass from mole of atom)
(iii)

3.011 \times 1 0^{23}

number of

N

atoms (mass from number)
(iv)

6.022 \times 1 0^{23}

number of

N_{2}

molecules (mass from number)

Calculate the number of particles in each of the following:
(i)

46 g

Na

atoms (number from mass)
(ii)

8 g O_{2}

molecules (number of molecules from mass)
(iii)

0.1

mole of carbon atoms (number from given moles)

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23 questions

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25 questions

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6 questions

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29 questions

Question

Medium

Solving time: 3 mins

Calculate the number of particles in each of the following:
(i) $46 g$ of $Na$ atoms (number from mass)
(ii) $8 g O_{2}$ molecules (number of molecules from mass)
(iii) $0.1$ mole of carbon atoms (number from given moles)

Name: Video solution 1: [Solved] Calculate the number of particles in each of the following:(i) 46 g of Na atoms (number from mass)(ii) 8 gO2 molecules (number of molecules from mass)(iii) 0.1 mole of carbon atoms (number from given moles) - Science
Uploaded: 2022-12-06T15:50:52.000Z
Duration: 7 min
Description: Video solution 1: [Solved] Calculate the number of particles in each of the following:(i) 46 g of Na atoms (number from mass)(ii) 8 gO2 molecules (number of molecules from mass)(iii) 0.1 mole of carbon atoms (number from given moles) - Science

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Updated on: Dec 6, 2022

Book:

Science (NCERT)

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Harper Discussed

Calculate the number of particles in each of the following:
(i)

46 g

Na

atoms (number from mass)
(ii)

8 g O_{2}

molecules (number of molecules from mass)
(iii)

0.1

mole of carbon atoms (number from given moles)

11 mins ago

Discuss this question LIVE

11 mins ago

Text solutionVerified

(i) The number of atoms

= \frac{given mass}{molar mass} \times Avogadro number

\Rightarrow N = \frac{m}{M} \times N_{A}

\Rightarrow N = \frac{46}{23} \times 6.022 \times 1 0^{23}

\Rightarrow N = 12.044 \times 1 0^{23}

(ii) The number of molecules

= \frac{given mass}{molar mass} \times Avogadro number

\Rightarrow N = \frac{m}{M} \times N_{A}

atomic mass of oxyen

= 16 u

∴

molar mass of

O_{2}

molecules

= 16 \times 2 = 32 g

\Rightarrow N = \frac{8}{32} \times 6.022 \times 1 0^{23}

\Rightarrow N = 1.5055 \times 1 0^{23}

≃ 1.51 \times 1 0^{23}

(iii) The number of particles (atom) = number of moles of particles

x

Avogadro number

N = n \times N_{A} = 0.1 \times 6.022 \times 1 0^{23}

= 6.022 \times 1 0^{22}

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Practice more questions from Science (NCERT)

Calculate the mass of the following:
(i)

0.5

mole of

N_{2}

gas (mass from mole of molecule)
(ii)

0.5

mole of

N

atoms (mass from mole of atom)
(iii)

3.011 \times 1 0^{23}

number of

N

atoms (mass from number)
(iv)

6.022 \times 1 0^{23}

number of

N_{2}

molecules (mass from number)

Calculate the number of particles in each of the following:
(i)

46 g

Na

atoms (number from mass)
(ii)

8 g O_{2}

molecules (number of molecules from mass)
(iii)

0.1

mole of carbon atoms (number from given moles)

View all

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Question Text	Calculate the number of particles in each of the following: (i) $46 g$ of $Na$ atoms (number from mass) (ii) $8 g O_{2}$ molecules (number of molecules from mass) (iii) $0.1$ mole of carbon atoms (number from given moles)
Updated On	Dec 6, 2022
Topic	Atoms and Molecules
Subject	Science
Class	Class 9
Answer Type	Text solution:1 Video solution: 1
Upvotes	181
Avg. Video Duration	7 min

Calculate the number of particles in each of the following:
(i) $46 g$ of $Na$ atoms (number from mass)
(ii) $8 g O_{2}$ molecules (number of molecules from mass)
(iii) $0.1$ mole of carbon atoms (number from given moles)

Text solutionVerified

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Calculate the number of particles in each of the following:(i) 46 g of Na atoms (number from mass)(ii) 8 gO2​ molecules (number of molecules from mass)(iii) 0.1 mole of carbon atoms (number from given moles)

Text solutionVerified

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Calculate the number of particles in each of the following:
(i) $46 g$ of $Na$ atoms (number from mass)
(ii) $8 g O_{2}$ molecules (number of molecules from mass)
(iii) $0.1$ mole of carbon atoms (number from given moles)