How many oxygen atoms are in 4.00 g of quartz?
Asked by maham237 @ in Chemistry viewed by 429 People
How many oxygen atoms are in 3.60 g of quartz?
Answered by maham237 @
Answer: 7.226 x 10^22 oxygen atoms
EXPLANATION :
we know that 1 mole of anything is 6.022 x 10^23 of that thing.
The formula of Quartz is SiO2. So, 1 mole of Quartz will have 2 moles of oxygen atoms, i.e. 2 x 6.022 x 10^23 atoms of oxygen.
The molar mass of quartz is 60 g per mol. So, 60 g quartz means 1 mole quartz. We are given 3.6 g quartz,
60 g quartz means 1 mole quartz or 2 x 6.022 x 10^23 oxygen atoms.
then 3.6 g quartz will have oxygen atoms equal to (2 x 6.022 x 10^23 x3.6) / 60 = 0.7226 x 10^23 oxygen atoms or 7.226 x 10^22 oxygen atoms.
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