Question

The number of water molecules is maximum in (a) 1.8g of water (b) 18g of water (c) 18mol of water (d) 18 molecules of water

Answer 1

Answer: hello mate here is ur answer

18 moles of water will have the maximum no of water molecules

explanation - a) 1.8 grams of water

we know that 1 moles of an substanc = avagadros no of particles

⇒ 1 mole = mass in gm / mol mass

= 1.8 / 18 = 0.1 moles

1 mole = 6.022 * 10 ^23

0.1 mole = 6.022 * 10^22

b) 18 gm of h2o

= 18/18 = 1 mole

= 6.022 *10^23 molcules

c) here mass in gm is not given

we know the no of moles

1 mole = mass in gm / mol mass

18 moles = mass in gm/ 18

18 * 18 = mass in gm

18 moles will have 18 * 6.022 * 10 ^23 molecules

d) 18 molecules of water

here the no of molecules is already given which is the least of all

so the correct option is c 18 moles of water coz this will have the highest no of molecules of water

hope it helps!!!!!!!

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