A chemist carefully measures the amount of heat needed to raise the temperature of a 894.0g sample of a pure substance from to −
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Answer :
The molar mass of ibuprofen is, 206.29 g/mole.
The number of moles of ibuprofen in a single tablet is, 0.000969 moles
The number of moles of ibuprofen in four doses is, 0.007752 moles
Solution : Given,
Molar mass of carbon = 12.01 g/mole
Molar mass of hydrogen = 1.01 g/mole
Molar mass of oxygen = 15.99 g/mole
1) Now we have to calculate the molar mass of ibuprofen.
Molar mass of ibuprofen, =
The molar mass of ibuprofen = 206.29 g/mole
2) Now we have to calculate the moles of ibuprofen.
Formula used :
Given : Mass of ibuprofen = 200 mg = 0.2 g (1 mg = 1000 g)
The moles of ibuprofen = 0.000969 moles
3) Now we have to calculate the number of moles of ibuprofen for four doses.
Number of tablets in one dose = 2
Total number of tablets in 4 doses = 4 × 2 = 8
Number of moles of ibuprofen in 8 tablets =