chemistry

posted by .

You need to find the number of moles in 5mL of a substance given the density and the molecular weight.

How do you do this?

  • chemistry -

    lets take oxygen to be the substance given. the molecular weight also called the molar mass given as 16. the density always remain constant as 1g/ml. so lets comvert everything together as

    5ml*1g/ml*1mole/16g = 0.313moles.

    remember that 16g/mol is the molarmass or molecular weight.

  • chemistry -

    The infor by chinomso is good except that the molar mass oxygen is 32 and not 16. Let's use something besides oxygen (especially since it doesn't have a density of 1.0 g/mL.)

    H2O can be used and it does have a density of 1.0 g/mL.
    So 5 mL x (1.0 g/mL) x (1 mol/18 g) = moles H2O where 18 is the molar mass of H2O.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry

    Can you convert density to moles? I am given the density of a substance [0.789 g/mL] but I need to know the number of moles for the equation. You cannot convert density to moles, unless you also know the volume and the molecular formula.
  2. chemistry

    Hexane is a hydrocarbon (a molecule containing only carbon and hydrogen) with a molecular weight of 86.18 g/mol, a density of 0.660 g/mL, and a boiling point of 69C . Pentanol is an alcohol (a hydrocarbon with a "OH" group attached …
  3. chemistry

    Hexane is a hydrocarbon (a molecule containing only carbon and hydrogen) with a molecular weight of 86.18 g/mol, a density of 0.660 g/mL, and a boiling point of 69C. Pentanol is an alcohol (a hydrocarbon with a "OH" group attached …
  4. Chemistry

    Hexane is a hydrocarbon (a molecule containing only carbon and hydrogen) with a molecular weight of 86.18 g/mol, a density of 0.660 g/mL, and a boiling point of 69C. Pentanol is an alcohol (a hydrocarbon with a "OH" group attached …
  5. chemistry

    How do you find the number of moles in a substance if you have the density and the molecular weight?
  6. chemistry

    If you have 12 moles of a substance, how many molecules do you have of that substance?
  7. Chemistry

    The following questions concern the iconic Nestle Toll House Chocolate Chip Cookie recipe, shown below: 2 1/4 cups all-purpose flour 1 teaspoon baking soda 1 teaspoon salt 1 cup butter or margarine, softened 3/4 cup granulated sugar …
  8. Chemistry

    Calculate the number of moles of ag in 5ml of .004m agno3 and the number of moles of cr04 in 5ml of .0024m k2cro4
  9. Chemistry

    Baking soda consists mostly of a single chemical. Look up what it is, its molecular weight and density, and determine the number of moles used in this recipe. Give your answer in moles but do not include the units.
  10. chemistry

    a sample of gaseous substance at 25 degrees Celsius and 0.862atm has a density of 2.6g/l. what is the molecular weight of the substance?

More Similar Questions