chemistry

posted by .

how many grams of Na2CO3 must be dissolved into 155 g of water to create a solution with the molality of 8.20 mol/kg?

  • chemistry -

    MW(Na2CO3)=105.96g/mol

    Volume- 155g H20 = 0.155L H20
    Concentration- 8.20mol/L

    n=CV
    n=(8.20mol/L)(0.155L)
    n=52.9mol

    m=nMW
    m=(52.9mol)(105.96g/mol)
    m=5605.6g
    m=5.61Kg

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. thermodynamics?

    calculate the number of grams of glycerol, C3H5(OH)3 (MW=92.1 g/mol), that must be dissolved in 520 grams of water to raise the boiling point to 102.00 degrees Celsius. this whole chapter really lost me. delta T = Kb*molality delta …
  2. Chemistry

    What is the molality of a glucose solution prepared by dissolving 18.0g of glucose, C6H12O6 in 125g of water?
  3. Chemistry

    Urea (NH2)2CO is dissolved in 100.0 g of water. The solution freezes at -0.085 degrees C. how many grams of urea were dissolved to make this solution. delta T = Kf*molality Plug in 0.085 for delta T, I assume you know Kf for water, …
  4. Chemistry

    Urea (NH2)2CO is dissolved in 100.0 g of water. The solution freezes at -0.085 degrees C. how many grams of urea were dissolved to make this solution. delta T = Kf*molality Plug in 0.085 for delta T, I assume you know Kf for water, …
  5. Chemistry

    Urea (NH2)2CO is dissolved in 100.0 g of water. The solution freezes at -0.085 degrees C. how many grams of urea were dissolved to make this solution. delta T = Kf*molality Plug in 0.085 for delta T, I assume you know Kf for water, …
  6. Chemistry

    A solution contains .370 mol of isopropanol (C3H7OH) dissolved in 1.700 mol of water. What is the mass percent of isopropanol?
  7. Chemistry

    A solution is made up by dissolving 14.8 g Na2CO3 ยท 10 H2O in 110.5 g of water. What is the molality of Na2CO3 in this solution?
  8. Chemistry

    A solution contains 0.55 g of dissolved Sn 4+ ions. How many grams of Na2CO3 must be added to the solution to completely precipitate all of the dissolved Sn4+?
  9. chemistry

    8.058g x 10-2 kg of washing soda na2co3 10h20 is dissolved in water to obtain 1L of a solution of density 1077.2kg/m3. Calculate the molarity, molality and mole fraction of na2c03 in the solution?
  10. chemistry

    this is a really long question. i don't understand how to answer it. help please. A 10.0% aquueous solution of sulfuric acid has a density of 1.0661 g/mL at 20 degrees celsius. A. how many grams of H2SO4 are found in 50.0 g of this …

More Similar Questions