Question

find the number of molecules in 9g of water

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Answer 1

Answer:

molecules in 18g of water are 6.022*10²³

moleculesin 1g are (6.022*10²³)/18

molecules in 9g are 3.011*10²³

Answer 2

HOW MANY WATER MOLECULES ARE PRESENT IN 9 GRAMS OF WATER(H2O)?

now,

Molecular weight of the given amount of water = 18g

Given weight of water = 9g

Number of moles present = molecular weight + given weight

therefore, number of moles of water = 9/18 = 0.5 mol

now, we know 1 mol contains 6.022 × 10²³

then, 0.5 mol contains 6.022 × 10²³/2

= 3.011 × 10²³ molecules are present in 9g of water