Question

how many molecules of water are the in 36 mg of water?

Answer 1

Answer:

H2O is the formula for Water.

Molecular mass = 2(H)+1(O)

= 2*1 + 1*16 = 2 + 16 = 18 gm

1 gm molecule of water = 18 g of water.

18gm of water contain 6.023 x 10^23 molecules of water

For 36 gm of water contain

36x 6.023 x 10^23/18

= 2 x 6.023 x 10^23 molecules of water

2x6.023x10^23 molecules of water

Answer 2

Answer:

The Avogadro's number has a value of 6.022×1023 particles/mol 6.022 × 10 23 p a r t i c l e s / m o l . By inspecting the units, we know that we can acquire the number of partilces by multiplying the number of moles.