A can of mineral wter contains 345 mL of water. How many molecules of water does the can contain? ( water= 1.00 g/mL)
2007-09-12 08:43:14 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
345mLH2O x 1gH2O/1mLH2O x 1molH2O/18gH2O x 6.02x10^23moleculesH2O/1molH2O = 1.15 x 10^25 molecules H2O
2007-09-12 08:48:51 · answer #1 · answered by steve_geo1 7 · 0⤊ 0⤋
The atomic weight of water is figured by looking up the atomic weight of H times 2 plus O times 1. This weight in grams is 1 Mole of Water. So now divide that number into the weight of your water 345gm and you will have the number of Moles of water. Hint your answer should be approximately 20 Moles - but figure it out exactly for yourself.
Once you have the number of Moles just multiply by Avogadro's Number of 6.022 X 10^23 atoms/mole.
2007-09-12 15:50:03 · answer #2 · answered by rscanner 6 · 0⤊ 0⤋