PUMPA - SMART LEARNING

எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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21. Intext problems: Calculation of mass from mole I

1. Calculate the mass of \(0.3\) \(mole\) of aluminium (atomic mass of \(Al=27\)).

Data:

Given moles of aluminium \(= 0.3\) \(mole\)

Atomic mass of aluminium \(= 27\)

Formula:

Mass of aluminium \(=\)

Solution:

By substituting the values to the above formula, we get,

Mass of aluminium \(=\)

Hence, the mass of \(0.3\) \(mole\) of aluminium \(=\)

2. Calculate the mass of \(2.24\) \(litre\) of \(SO_2\) gas at STP.

Data:

Given volume of \(SO_2=2.24\) \(L\)

Atomic mass of \(S=\) \

Atomic mass of \(O=\)

Solution:

Molecular mass of \(SO_2\) \(=\)

Number of moles of \(SO_2\) \(=\)

By substituting the values in the above formula, we get,

Number of moles of \(SO_2\) \(=\)

Mass \(=\)

Hence, the mass of \(2.24\) \(litre\) of \(SO_2=\)

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