1-2 - 1024 atoms of iron weighs grams-

The correct option is B 111.5 For Fe atomic mass = 56 g = 6.023 × (10 )^ 23 atoms 1.2 × 10 ^ 24 #160;atoms = 56 6.023× 10 ^ 23 × ...

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Standard IX

Chemistry

Molecules and Atomicity

1.2 × 1024 at...

Question

$1.2 \times 10^{24}$ atoms of iron weighs ______ grams.

90

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111.5

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80

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70

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Solution

The correct option is B $111.5$
For Fe atomic mass $= 56$ g $= 6.023 \times (10)^{23}$ atoms
$1.2 \times 10^{24}$ atoms $= \frac{56}{6.023 \times 10^{23}} \times 1.2 \times 10^{24} = 111.5$ g

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Similar questions

Atomic number (Z) of Iron, Fe is 26, Atomic mass 56. Using the above information answer the following.

(a) 1 mole of iron weighs …………….. grams.

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(d) 1 gram of iron contains ……………... atoms.

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(f) 1.2 × 10²⁴ atoms of iron would be …………….. moles of iron.

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1.2×1024 atoms of iron weighs ______ grams.

The correct option is B 111.5For Fe atomic mass =56 g =6.023×(10)23 atoms1.2×1024 atoms =566.023×1023×1.2×1024=111.5g

$1.2 \times 10^{24}$ atoms of iron weighs ______ grams.

The correct option is B $111.5$
For Fe atomic mass $= 56$ g $= 6.023 \times (10)^{23}$ atoms
$1.2 \times 10^{24}$ atoms $= \frac{56}{6.023 \times 10^{23}} \times 1.2 \times 10^{24} = 111.5$ g