Answer:
Molar mass of ascorbic acid=176.13 g/mol
Number of moles in a ascorbic acids tablet contain 546 mg =![3.1\times 10^{-3}](https://tex.z-dn.net/?f=3.1%5Ctimes%2010%5E%7B-3%7D)
Number of molecules in a tablet of ascorbic acid of mass 546 mg=
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=![546\times 10^{-3}](https://tex.z-dn.net/?f=546%5Ctimes%2010%5E%7B-3%7D)
We have to find the number of moles and molecules of vitamin in C
We know that the chemical formula of ascorbic acid ![C_6H_8O_6](https://tex.z-dn.net/?f=C_6H_8O_6)
Molar mass of vitamin C =6(12.011)+8(1.0079)+6(16)=176.13 g/mol
Number of moles=![\frac{Given mass }{Molar mass}](https://tex.z-dn.net/?f=%5Cfrac%7BGiven%20mass%20%7D%7BMolar%20mass%7D)
Number of moles of vitamin C=![\frac{546\times 10^{-3}}{176.13}](https://tex.z-dn.net/?f=%5Cfrac%7B546%5Ctimes%2010%5E%7B-3%7D%7D%7B176.13%7D)
Number of moles of vitamin C=0.0031 moles=![3.1\times 10^{-3}](https://tex.z-dn.net/?f=3.1%5Ctimes%2010%5E%7B-3%7D)
Number of molecules of vitamin C=![3.1\times 10^{-3}\times 6.022\times 10^{23}](https://tex.z-dn.net/?f=3.1%5Ctimes%2010%5E%7B-3%7D%5Ctimes%206.022%5Ctimes%2010%5E%7B23%7D)
Where Avogadro's number =![6.022\times 10^{23}](https://tex.z-dn.net/?f=6.022%5Ctimes%2010%5E%7B23%7D)
Number of molecules of vitamin C=![18.67\times10^{20}](https://tex.z-dn.net/?f=18.67%5Ctimes10%5E%7B20%7D)
=
molecules