A simple recreation of the Nestle Toll House Chocolate Chip Cookie recipe is as follows:

Question

2 1/4 cups all - purpose flour

1 tsp. baking soda

1 tsp. salt

1 cup (2 sticks butter or margarine, softened

3/4 cups granulated sugar

3/4 cups packed brown sugar

1 tsp. vanilla extract

2 large eggs

2 cups NESTLE TOLL HOUSE Semi-Sweet Chocolate Morsels

1 cup chopped nuts

A) Baking soda consists mostly of a single chemical, sodium bicarbonate (NaHCO3). Look up the molecular weight and density of sodium bicarbonate, and determine the number of moles used in this recipe. Give your answer in moles but do not include the units.

I really need help with this question, I don't understand how I am supposed to determine the number of moles with just the density and weight.

Answer 1

1 tsp = 4.93 cm^3
mol wt = 84 g/mole
density = 2.2 g/cm^3

Now just make sure that the units work out
2.2 g/cm^3 * 4.93cm^3 * 84g/mole = (2.2*4.93*84) moles

Answer 2

volume of NaHCO3 ... 1 tsp = 4.93 cm^3

volume * density = mass

mass / molar weight = moles

Answer 3

oops. I should have divided by g/mole to make the units come out.
Go with R_scott's solution