Question

A milk vendor supplies 78 liters of milk on day 1, 34 liters on day 2 and 90 liters on day 3. how many liters of milk does he supply in 3 days? ​

Answer 1

Answer :-

Percentage by mass of water in MgSO₄.7H₂O is 51.21 % .

Explanation :-

We have :-

→ Atomic mass of Magnesium = 24 u

→ Atomic mass of Sulphur = 32 u

→ Atomic mass Oxygen = 16 u

→ Atomic mass of Hydrogen = 1 u

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Molecular mass of Magnesium Sulphate crystals i.e. MgSO₄.7H₂O will be :-

= 24 + 32 + 16 × 4 + 7(1 × 2 + 16)

= 56 + 64 + 7(18)

= 120 + 126

= 246 u

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Now, one molecule of Magnesium Crystal has (7 × 18) = 126 u of water .

So, the mass percentage of water in the molecule will be :-

= (126/246) × 100

= 0.5121 × 100

= 51.21 %

Answer 2

Answer:

Your answer my dear friend

Total milk supplied by the milk vendor

=> 78 litres + 34 litres+ 90 litres

=> 202 litres of milk is supplied by the milk vendor