1) how many g h2O are present in 0.25 mol of it? a.4.5 b.18 c.0.25 d.5.4

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Question : Directions: Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
ac _ bd _ ce _df _ egh

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Answer 1

Hello dear student

1 mole of water weighs = the molecular mass of water.

thus the amount of present in 0.25 mole of it is 4.5 grams

So ans a. 4.5 gm

or

mass of water - 0.25 mol

We know molecular mass of water ( M) = 18

No. Of grams ( W) ?

No. Of moles = W/M

W= No of moles × M

W = 0.25 × 18

W= 4.5 gm

hope that's helpful

best of luck

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1) how many g h2O are present in 0.25 mol of it? a.4.5 b.18 c.0.25 d.5.4

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