Respuesta :
(a) 485 x 200 mg = 97000 mg of ibuprofen in the bottle
97000 mg x (1g/1000mg) = 97g of ibuprofen in the bottle
97g (1 mol/ 206.5gC13H18O2) = 0.46973 moles of ibuprofen in the bottle
(b) 0.46973 mol C13H18O2 (6.022 x 10^23 molecules/1mol) = 2.8287 x 10^23 molecules of ibuprofen in the bottle
Answer:
a) Moles of ibuprofen in a bottle of ibuprofen = 0.47 mol
b) No. of molecules in a bottle of ibuprofen is [tex]2.83\times 10^{23}\ molecules[/tex]
Explanation:
a)
Given:
Molar mass of ibuprofen = 206.3 g/mol
Amount of ibuprofen in one tablet = 200 mg
No. of tablet in a bottle = 485
Total amount of ibuprofen in one bottle
= 485 × 200
= 97000 mg or 97 g
Mole is given by,
[tex]mole=\frac{Mass\ in\ g}{Molar\ mass}[/tex]
Moles in 97 g of ibuprofen = [tex]=\frac{97}{206.3} =0.47\ mol[/tex]
Moles of ibuprofen in a bottle of ibuprofen = 0.47 mol
b)
Number of molecules in one mole = [tex]6.02\times 10^{23}[/tex]
No. of molecules in 0.47 mol is,
[tex]0.47 \times 6.02 \times 10^{23}= 2.83\times 10^{23}\ molecules[/tex]
No. of molecules in a bottle of ibuprofen is [tex]2.83\times 10^{23}\ molecules[/tex]
