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Mole Concept & Avogadro Number

5.6 g of pota...

Question

$5.6 g$ of potassium hydroxide contains same number of $K$ atoms as are present in

A

13.8 g

of

K_{2} C O_{3}

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B

6.9 g

molecules of potassium carbonate

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C

100

milli moles of

K O H

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D

74.5 g

of

K C l

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Solution

The correct options are
B $6.9 g$ molecules of potassium carbonate
C $100$ milli moles of $K O H$

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Similar questions

C l_{2} + 2 K O H \to K C l + K C l O + H_{2} O

3 K C l O \to 2 K C l + K C l O_{3}

4 K C l O_{3} \to K C l + 3 K C l O_{4}

2 moles of chlorine gas reacted with an excess of potassium hydroxide and 50 g of potassium perchlorate was obtained. Calculate the percentage yield of perchlorate in the reaction.
Molar mass of potassium perchlorate = 138.5 g/mol

Q. How many water molecules are produced in the complete neutralization of one mole phosphoric acid potassium hydroxide?

C l_{2} + 2 K O H \to K C l + K C l O + H_{2} O

3 K C l O \to 2 K C l + K C l O_{3}

4 K C l O_{3} \to K C l + 3 K C l O_{4}

2 moles of chlorine gas reacted with an excess of potassium hydroxide and 50 g of potassium perchlorate was obtained. Calculate the percentage yield of perchlorate in the reaction.
Molar mass of potassium perchlorate = 138.5 g/mol

Q. The number of potassium atoms present in

117

g of potassium sample (Molecular Weight

= 39

Q. How many molecules of K2CO3 are present in one mole?
( given atomic masses K=39u C=12u and O=16u)

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