Question

how many molecules of water are there in 10 gram of water​

Answer 1

Answer:

Molecular Mass of Water = 18g

Given Mass = 10 g

Number of moles = Given Mass / Molar Mass

⇒ Number of moles = 10 / 18 = 5 / 9 = 0.56 moles

Now we know that,

1 mole = 6,023 × 10²³ molecules

Therefore, 0.56 moles = ?

Cross multiplying we get,

⇒ x × 1 = 0.56 × 6.023 × 10²³

⇒ x = 3.37 × 10²³ molecules.

Hence 10g of water contains 3.37 × 10²³ molecules.

Hope it helped !!

Thanks !!

Answer 2

Explanation:

James Galloway's lab at the University of Virginia, found that while organic and conventional farms have comparable on-farm nitrogen losses for crops systems, organic farming helps prevent nitrogen pollution by recycling three times more reactive nitrogen than conventional.