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Mole Concept and Avogadro's Number

Which has a h...

Question

Which has a higher number of atoms : 1 g. of $O_{2}$ or 1 g. of $C l_{2}$ ?
(Molecular Weight of $O = 16, C l = 35.5$ g/mol)

A

O_{2}

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B

C l_{2}

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C

Both

C l_{2}

and

O_{2}

have same

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D

Cannot be determined

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Solution

The correct option is A $O_{2}$
As we know.
Moles $(n) = w / M$
Number of atoms in $1$ g $O_{2} = 2 * n * N_{A} = 2 N_{A} / 32$
Number of atoms in $1$ g $C l_{2} = 2 * n * N_{A} = 2 N_{A} / 71$

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Similar questions

4 L i + O_{2} \to 2 L i_{2} O

21.0

g of lithium reacts with

32.0

O_{2}

2 K + C l_{2} \to 2 K C l

3.9

K

4.26

C l_{2}

.
[The atomic weight of

L i = 7

K = 39

g while molecular weight of

L i_{2} O = 30

K C l = 74.5

Which of the following statements is/are correct?

The correct order of the oxidizing power of Cl₂, Br₂, I₂ and O₂ is:

Q. Question 1
Calculate the molecular masses of

H_{2}, O_{2}, C l_{2}, C O_{2}, C H_{4}, C_{2} H_{6}, C_{2} H_{4}, N H_{3}, C H_{3} O H

Q. Ammonia prepared by treating ammonium sulphate with calcium hydroxide is completely used by

N i C l_{2} .6 H_{2} O

to form a stable coordination compound (

[N i (N H_{3})_{6}] C l_{2}

). Assume that both the reactions are

100

1584

g of ammonium sulphate and

952

N i C l_{2} .6 H_{2} O

are used in the preparation, the combined weight (in grams) of gypsum (

C a S O_{4} .2 H_{2} O

) and the nickel-ammonia coordination compound thus produced is ____.

(The reactions involved are:

C a (O H)_{2} + (N H_{4})_{2} S O_{4} \to 2 N H_{3} + C a S O_{4} .2 H_{2} O

N i C l_{2} .6 H_{2} O + 6 N H_{3} \to [N i (N H_{3})_{6}] C l_{2} + 6 H_{2} O

Atomic weights in

g m o l^{- 1}

H = 1, N = 14, O = 16, S = 32, C l = 35.5, C a = 40, N i = 59)

Q. Which one of the following will have largest number of atoms ?
(i) 1 g

A u

N a

L i

(s)
(iv) 1 g of

{C l}_{2}

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