Question

Calculate the number of moles in 1260g of H2O(H=1u,o=16u)

Answer 1

Answer:

h2o = 2 ×1 + 16

= 18

for 1260 g

= 1260/18

70 moles of h2o

Explanation:

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Answer 2

Answer:

Mass of O = 16 g

Mass of H2 = 2g

Molar mass = 16+2=18g

18 g of water = 1 mole

Number of moles= Given mass / molar mass

Moles = 1260/18

= 70

Therefore 1260g of water contains 70 moles

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