Question

How many numbers of moles are present in 15L of water at STP?

Answer 1

$\huge\red{As-Salamu-Alykum}$

_______________

$\huge\red{Given :- }$

Volume of water = 15L

Volume at STP is 22.4 dm3 or litre

$\huge\blue{Required:-}$

Moles of water = ?

$\huge\purple{Solution}$

Moles of water = Volume in litre / Volume atSTP

Moles of water = 15 /22.4

$\huge\pink{Moles of water = 0.66 mol}$

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$\huge\green{INSHALLAH it will help U}$

Answer 2

Caution - Process might not be accepted by boards other than ICSE

1 mole of water at STP = 22.4 L

Thus.....

1 Litre of water = 1/22.4 moles

Number of moles present in 15 litres of water
= 15*1/22.4
= 0.6696 moles
= 0.66 moles


Hope this helps.....