chemistry

posted by .

an aqueous solution solution of sodium borate is sometimes used to to fire-proof wood.
a. what is the molarity of 2.50 L of solution that contains 1.85 moles of sodium borate?

b. what is the molarity of 45.0 L of solution that contains 6.78 kg of sodium borate?

c. how manny moles of sodium borate are in 600.0 mL of a 1.57 M sodium borate solution?

d. a chemist needs 50.8 g of sodium borste for a reaction. How many mL of 1.87 M solution contain this mass?

  • chemistry -

    An aqueous solution solution of sodium borate is sometimes used to to fire-proof wood.
    a. what is the molarity of 2.50 L of solution that contains 1.85 moles of sodium borate?
    M = mols/L

    b. what is the molarity of 45.0 L of solution that contains 6.78 kg of sodium borate?
    Convert kg to grams, then
    mols sodium borate = grams/molar mass.
    Then M = mols/L


    c. how many moles of sodium borate are in 600.0 mL of a 1.57 M sodium borate solution?
    mols = M x L

    d. a chemist needs 50.8 g of sodium borste for a reaction. How many mL of 1.87 M solution contain this mass?
    How many mols do you need? That's mols = grams/molar mass. solve for mols. Then
    M = mols/L; rearrange to L = mols/M. You have mol and M, solve for L and convert to mL.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    The mole fraction of an aqueous solution of sodium dichromate is 0.367. Calculate the molarity (in mol/L) of the sodium dichromate solution, if the density of the solution is 1.42 g mL-1.
  2. chemistry

    1. 15.0 g of sodium sulfate are dissolved in water to form 400.0 g of solution. The density of the solution is 1.056 g/mL at 25oC. a. What is the mass percent (%(w/w)) of sodium sulfate?
  3. Chemistry

    Sodium metal dissolves in liquid mercury to form a solution called a sodium amalgam. The densities of Na(s) and Hg(l) are 0.97 g/cm3 and 13.6 g/cm3, respectively. A sodium amalgam is made by dissolving 1.0 cm3 Na(s) in 20.0 cm3 Hg(l). …
  4. Chmistry

    Sodium metal dissolves in liquid mercury to form a solution called a sodium amalgam. The densities of Na(s) and Hg(l) are 0.97 g/cm3 and 13.6 g/cm3, respectively. A sodium amalgam is made by dissolving 1.0 cm3 Na(s) in 20.0 cm3 Hg(l). …
  5. chemistry

    ihave two solutions. in the first solution , 1.0 moles of sodium chloride is disslved to make 1.0 liters of solution . in the second one, 1.0 moles of sodium chlorine is added to 1.0 liters of water.is the molarity of each solution …
  6. chemistry

    a sodium hydroxide solution was prepared according to the procedure outlined in this weeks experiment. This sodium hydroxide solution was standardized by by titration against exactly 10mL of a 0.28M hydrochloric acid solution. In three …
  7. chemistry

    This soidum hydroxide solution was then used to determine the amount of acetic acid in vinegar. Three titrations of the sodium hydroxide solution against exactly 5mL of vinegar using phenolphthalein indicator required 22.85Ml, 22.67mL …
  8. CHEMISTRY URGENT

    1. You have been given a sample of unknown molarity. Calculate the molarity of a solution which has been prepared by dissolving 8.75 moles of sodium chloride in enough water to produce a solution of 6.22l. 2. You have a sample which …
  9. Chemistry

    1. You have been given a sample of unknown molarity. Calculate the molarity of a solution which has been prepared by dissolving 8.75 moles of sodium chloride in enough water to produce a solution of 6.22l. 2. You have a sample which …
  10. CHEMISTRY

    You have been given a sample of unknown molarity. Calculate the molarity of a solution which has been prepared by dissolving 8.75 moles of sodium chloride in enough water to produce a solution of 6.22l. 2. You have a sample which consists …

More Similar Questions