Answer to Question #261196 in Chemistry for Yow

Question

how many moles of water are in a snowflakes weighing 5.0x10^-5g? How many of these snowflakes would it take to have 1.0kg of ice?

Answer 1

Solution:

The molar mass of water (H₂O) is 18.015 g/mol

Hence,

(5.0×10^-5 g H₂O) × (1 mol H₂O / 18.015 g H₂O) = 2.775×10^-6 mol H₂O = 2.8×10^-6 mol H₂O

Convert kg to g:

(1.0 kg) × (1000 g / 1 kg) = 1000 g

Number of snowflakes = (1000 g) / (5.0×10^-5 g) = 2.0×10⁷ snowflakes

Answer:

2.8×10^-6 moles of water

2.0×10⁷ snowflakes