Question

HEY GUYZ! PLZ HELP ME.
Calculate the no. of molecules in:
a. 20 moles of water
b. 20 gm of water

Answer 1

To find the number of molecules in 0.20 moles of molecules, multiply the number of moles by the number of molecules in a mole:
(0.20 moles)(6.02 × 10^23 molecules/mole) = 1.204 × 10^23 molecules or 1.2 × 10^23 molecules rounded to two significant figures
Answer: The number of molecules present in 0.20 moles of H2O is about 1.2 × 10^23.

Answer 2

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