Answer:
Molar mass of ascorbic acid=176.13 g/mol
Number of moles in a ascorbic acids tablet contain 546 mg =[tex]3.1\times 10^{-3}[/tex]
Number of molecules in a tablet of ascorbic acid of mass 546 mg=[tex]1.867\times 10^{21}[/tex] molecules
Explanation:
We are given that ascorbic acid or vitamin C is an essential vitamin
We are given that given mass of ascorbic acid in a tablet =546.0 mg=[tex]546\times 10^{-3}[/tex]
We have to find the number of moles and molecules of vitamin in C
We know that the chemical formula of ascorbic acid [tex]C_6H_8O_6[/tex]
Molar mass of vitamin C =6(12.011)+8(1.0079)+6(16)=176.13 g/mol
Number of moles=[tex]\frac{Given mass }{Molar mass}[/tex]
Number of moles of vitamin C=[tex]\frac{546\times 10^{-3}}{176.13}[/tex]
Number of moles of vitamin C=0.0031 moles=[tex]3.1\times 10^{-3}[/tex]
Number of molecules of vitamin C=[tex]3.1\times 10^{-3}\times 6.022\times 10^{23}[/tex]
Where Avogadro's number =[tex]6.022\times 10^{23}[/tex]
Number of molecules of vitamin C=[tex]18.67\times10^{20}[/tex]
=[tex]1.867\times 10^{21}[/tex] molecules
