Calculate the number moles of magnesium in 0.478 g of magnesium ?

0.019

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0.11

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O.25

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None of the above

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Solution

The correct option is B 0.019
Given: The mass of magnesium=0.478 g

Molar mass of magnesium= 24 g

$No of moles of magnesium = \frac{Mass of magnesium}{Molar mass of magnesium}$

$N_{A} = \frac{0.478 g}{24 g}$

$N_{A} = 0.019$

Hence, the correct option is $A$

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Calculate the number of moles of magnesium present in a magnesium ribbon weighing 12 g. Molar atomic mass of magnesium is

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Chlorophyll the green pigment a complex of magnesium contains 2.68 % of magnesium by weight. Calculate the number of magnesium atoms in 5 gram of the chlorophyll.

Please explain in detail.

Q. Chlorophyll contains 2.68% of magnesium by mass. Calculate the number of magnesium atoms in 3.00 gms of chlorophyll.

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Calculate the number moles of magnesium in 0.478 g of magnesium ?

The correct option is B 0.019Given: The mass of magnesium=0.478 gMolar mass of magnesium= 24 gNo of moles of magnesium=Mass of magnesiumMolar mass of magnesiumNA=0.478 g24 gNA=0.019Hence, the correct option is A

The correct option is B 0.019
Given: The mass of magnesium=0.478 g

Molar mass of magnesium= 24 g

$No of moles of magnesium = \frac{Mass of magnesium}{Molar mass of magnesium}$

$N_{A} = \frac{0.478 g}{24 g}$

$N_{A} = 0.019$

Hence, the correct option is $A$