Name:



Name: ________________________

Date: ________________

Period: _______

Christmas Assignment (Show all work)

1.) 1.6 mg of nicotine is found in one cigarette. The chemical formula for nicotine is C10H14N2.

a.) What is the gram formula mass of nicotine?

b.) Find the percent composition (of each element).

% C = _________

% H = _________

% N = _________

c.) How many moles of nicotine are found in one cigarette? (Hint: Convert mg to g.)

d.) How many nicotine molecules are there in one cigarette?

e.) How many atoms of nicotine are there in one cigarette?

2.) Methylphenidate (aka Ritalin) is a prescription stimulant often prescribed to treat ADD. Its chemical formula is C14H19NO2. It is prescribed as tablets of 5, 10, and 20 mg for oral administration.

a.) Calculate the gram formula mass of Ritalin.

b.) Find the percent composition (of each element).

% C = _________

% H = _________

% N = _________

% O = _________

c.) Find how many moles of Ritalin are in each dose (5 mg, 10 mg, and 20 mg).

3.) The chemical formula for caffeine is C8H10N4O2.

a.) What is the gram formula mass of caffeine?

b.) Find the percent composition (of each element).

% C = _________

% H = _________

% N = _________

% O = _________

c.) The following drinks contain caffeine:

- 8 oz Chocolate milk = 5 mg

- 12 oz Coca Cola Classic = 34.5 mg

- 8 oz Coffee (brewed) = 107.5 mg

- 8 oz Coffee (decaf, brewed) = 5.6 mg

- 12 oz Diet Coke = 45 mg

- 12 oz Lipton Brisk = 9 mg

- 8.3 oz Red Bull = 80 mg

- 8 oz Starbucks Coffee = 165 mg

Choose your 4 favorite drinks and determine how many moles of caffeine you would be drinking if you drank the specified amount of each drink.

4.) There is 325 mg of aspirin (chemical formula = C9H8O4) in one tablet.

a.) What is the gram formula mass of aspirin?

b.) Find the percent composition (of each element).

% C = _________

% H = _________

% O = _________

c.) How many moles of aspirin would you be consuming if you took two aspirin? How many molecules? How many atoms?

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