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Chemistry
Derrick Reeves
1 September, 02:21
How many moles in 28 grams of UO2?
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Stuart
1 September, 03:35
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There are 0.135moles of UO2 in 28 grams of UO2
Explanation:
The SI base unit for amount of substance is the mole. 1 mole is equal to 1 mole UO2, or 207.03grams.
This is the molar mass of UO2, calculated from the sum of the molar masses of uranium and oxygen.
That is, molar mass of UO2 = molar mass of U + (molar mass of O) 2
=238.03g/mol + (16g/mol) 2
= 238.03g/mol + 32g/mol = 270.03g/mol
Molar mass of UO2 = 270.03g/mol
This implies that 1 mole of UO2 has a mass of 207.03 grams
Number of moles of UO2 = mass of UO2 / molar mass of UO2
Mass of UO2 = 28 grams
Number of moles of UO2 = 28 g / 207.03gmol-1
Number of moles = 0.1352 moles of UO2
Therefore, there are 0.135 moles of UO2 in 28 grams of UO2.
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Enrique Hernandez
1 September, 05:40
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0.22 moles.
28 divided by 124 = 0.22
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