Chemistry

posted by .

1)The chemical formula for aspirin is C9H8O4. What is the mass of 0.40 mol of aspirin? How would I find this?

2)The gram molecular mass of oxygen is 16.0 g right?

3)How would I find the mass, in grams, of 3.01 x 10^23 molecules of water?

1. Add the atomic masses of the elements in the formula. That will be 1 mol. Then 0.4 of that will be 0.4 mol.

2. One mol (of anything) contains 6.02 x 10^23 molecules. So find the mols in 3.01 x 10^23 molecules and that times the molar mass of H2O (obtained by adding the atomic masses) will be that many grams.

Post your work if you get stuck.

1 mol of oxygen atoms has a mass of 16 grams.

water is H2O. One mol of water thus has a mass of approximately 18 grams

The mass of of 3.01 x 10^23 molecules of water is:

(3.01 x 10^23/mol) times the mass of one mol of water =


(3.01 x 10^23/mol) 18 grams.

Now, what is 3.01 x 10^23 divided by 1 mol?

1 mol = approximately 6.022*10^23


Question 1:

1 mol of C9H8O4 contains

9 moles of C, 8 moles of H and 4 moles of O. The mass of 1 mol of aspirine is thus:

(9*12 + 8 + 4*16) grams

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    I need some help with calculating percent yield and percent purity of aspirin. Here's my data (questions follow): SYNTHESIS Mass of salicylic acid.., 2.0 g Volume of acetic anhydride.., 5 mL Mass of watch glass.., 22.10 g Mass of aspirin …
  2. Chemistry

    Can some please check my answers for the following questions?
  3. Chemistry

    Aspirin is a weak acid with a Ka of 3.0x10^-5. Find the pH of a solution by dissolving .65g of aspirin in water and diluting it to 50mL. You can use RCOOH to represent aspirin. Molecular weight of aspirin is 180g/mol
  4. chemistry

    a. What is the molecular weight of aspirin (C9H8O4)?
  5. chemistry - synthesis of aspirin

    I wanted to calculate the theoretical and actual yield of aspirin. mass of salicylic acid = 2.005 g But isn't salicylic acid differ. from acetic acid?
  6. chemistry - synthesis of aspirin

    wanted to calculate the theoretical and actual yield of aspirin. mass of salicylic acid = 2.005 g But isn't salicylic acid differ. from acetic acid?
  7. chemistry - synthesis of aspirin

    This is an experiment for a synthesis of aspirin lab mass of salicylic acid = 2.005 g mass of acetic acid = ?
  8. Chemistry

    A student was synthesizing aspirin in the lab. Using the amount of limiting reactant, she calculated the mass of aspirin that should form as 5.24g. When she weighed her aspirin product on the balance, it mass was 2.23g. What is the …
  9. Chemistry

    Aspirin, C9H8O4 , is produced through the following reaction of salicylic acid, C7H6O3, and acetic anhydride, C4H6O3: C7H6O3(s) + C4H6O3(l) ---> C9H8O4(s) + HC2H3O2(l) A. What mass of aspirin (kg) could be produced from 75.0 mol …
  10. chemistry

    You take an aspirin tablet (a compound consisting solely of carbon, hydrogen, and oxygen) with a mass of 1.00 g, combust it under an oxygen atmosphere, and collect 2.20 g of carbon dioxide and 0.400 g water. The molar mass of aspirin …

More Similar Questions