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Question 1 of 3
How many moles are there altogether in a powder if Sucrose has a mole fraction of 0.3270 and there are 2.56 moles of Sucrose? Answer to 3 decimal places.
moles
Mole Fraction of A
Total Number of Moles = 2.56
0.3270
Total Number of Moles = 7.8287 = 7.829 to 3 dec pl
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Question 2 of 3
How many moles are there in a solution if the solution contains 681 grams of water (RMM 18.02) and this is a mole fraction of 0.9857? Answer to 3 decimal places.
Moles of Water present = Mass/RMM = 681 / 18.02 = 37.79134
Mole Fraction of A
0.9857
Total Number of Moles = 38.3395 = 38.340 to 3 dec pl
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Question 3 of 3
A pharmacist prepares a solution containing 179.54 grams of Chlorhexidine Gluconate (RMM 897.7) and at a mole fraction of 0.0036. How many moles are there in the total volume of solution? Answer to 3 decimal places.
Moles of Chlorhexidine = Mass/RMM = 179.54 / 897.7 = 0.2 moles
Total Number of Moles = Number of Moles of A
Mole Fraction of A
Total Number of Moles = 0.2
0.0036
Total Number of Moles = 55.5555 = 55.556 to 3 dec pl
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