How can I solve these Chemistry problems?

Question

I need to have these problems solved by wednesday this week.

7. Aspartame is an artificial sweetener that is 160 times sweeter that 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) How many moles of molecules are present in 10.0 g of Aspartame?

c) Calculate the mass of 1.56 mol of aspartame.

d) How many molecules are in 5.0 mg of Aspartame?

e) What is the mass of 1.0 x 10^9 molecules of Aspartame?

Answer 1

a) Calculate the molar mass of aspartame.

294.301 g/mol

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b) How many moles of molecules are present in 10.0 g of Aspartame?

10.0 grams @ 1 mol / 294.3 g = 0.0340 moles

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c) Calculate the mass of 1.56 mol of aspartame.

1.56 mol @ 294.3 g/mol = 459 grams

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d) How many molecules are in 5.0 mg of Aspartame?

0.005 grams @ 6.022e23 molecules / 294.3 grams= 1.0e19 molecules

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e) What is the mass of 1.0 x 10^9 molecules of Aspartame?

1.0e9 molecules @ 294.3 grams / 6.022e23 molecules= 4.9e-13 grams

that's your answers