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Answer :
Final answer:
The weight of a grain of sand that contains approximately 1.69x10^-4 moles of SiO₂ is approximately 0.016 grams (D).
Explanation:
To calculate the weight of a grain of sand that contains approximately 1.69x10^-4 moles of SiO₂ (silicon dioxide), you can use the molar mass of SiO₂.
The molar mass of SiO₂ is approximately 60.08 grams per mole.
Now, you have 1.69x10^-4 moles of SiO₂. To find the weight, you can use the following formula:
Weight (in grams) = Moles × Molar Mass
Weight = 1.69x10^-4 moles × 60.08 grams/mole
Weight ≈ 0.01016 grams
So, the weight of the grain of sand is approximately 0.01016 grams. None of the given options match this exact value, but the closest option is:
d) 0.016 grams
Please note that the options provided do not include the exact value, so you should choose the closest option.
Learn more about Molar Mass here:
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