Question

Aspartame is an artificial sweetener that is 160 times sweeter than sucrose (table sugar) when dissolved in water. It is marketed as Nutra-Sweet. The molecular formula of aspartame is C14H18N2O5.
a- Calculate the molar mass of aspartame.
b- what amount (moles) of molecules are present in 10.0 g aspartame?
c-Calculate the mass in grams of 1.56 mol aspartame.
d-What number of molecules are in 5.0 mg aspartame?
e-What number of atoms of nitrogen are in 1.2g aspartame?

Answer 1

a) use the periodic table

b) Use: \(\sf moles=\dfrac{mass}{molar~mass}\)

c) use the formula from b)

d) use the formula from b) and \(\sf moles=\dfrac{particles}{avogadro's~number }\)

(in this case, molecules are the particles)

e) Find the mass percent composition of N in aspartame:

\(\sf mass~percent~comp=\dfrac{N's~molar~mass}{Molar~mass~of~aspartame}*100\%\)

multiply the mass of aspartame (1.2 g) by the mass percent composition of N

then (following the formula from b) multiply it by avogadro's number

Answer 2

thank you soooo much @aaronq

Answer 3

no problems