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Standard IX

Chemistry

Molecular Mass

The molar mas...

Question

The molar mass of $C a C O_{3}$ is :

68

/

mol

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75

/

mol

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82

/

mol

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100

/

mol

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116

/

mol

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Solution

The correct option is B $100$ g $/$ mol
Molar mass of $C a$ is $40 g / m o l e$
Molar mass of $C$ is $12 g / m o l e$
Molar mass of $O$ is $16 g / m o l e$
Total molar mass is $40 + 12 + 16 \times 3 = 100 g / m o l$

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Q. When the calcium carbonate is reacted with an excess amount of hydrochloric acid, how much

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11.2

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at STP ?

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:

C a C O_{3} = 100

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Q. Statement 1: A

1.0

g sample of calcium citrate

C a_{3} (C_{6} H_{5} O_{7})_{2}

(molar mass

= 498

g/mol), contains more

C a

than a

1.0

g sample of calcium carbonate,

C a C O_{3}

(molar mass

= 100

g/mol)
Statement 2: There are more

C a

atoms in

1.0

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1.0

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Q. If

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The molar mass of CaCO3 is :

The correct option is B 100 g/molMolar mass of Ca is 40 g/moleMolar mass of C is 12 g/moleMolar mass of O is 16 g/moleTotal molar mass is 40+12+16×3=100 g/mol

The molar mass of $C a C O_{3}$ is :

The correct option is B $100$ g $/$ mol
Molar mass of $C a$ is $40 g / m o l e$
Molar mass of $C$ is $12 g / m o l e$
Molar mass of $O$ is $16 g / m o l e$
Total molar mass is $40 + 12 + 16 \times 3 = 100 g / m o l$