Help with simple chemistry questions?

NetherCraft 0

1. How many moles of sucrose are there in 2.00 L of a 0.500 molar solution?

2. There are 342 grams of sucrose in 1.00 mole of sucrose. What is the molar concentration (molarity) of a solution containing 171 grams sucrose in 1.25 L solution?

3. If water is added to 1 of sodium chloride in a flask until the volume of the solution is 1 liter, what is the molarity of the solution?

Also Check This  Quando accendo iMessage mi dice che il mio gestore potrebbe addebitarmi costi di SMS, mi spiegate perché?

4. What is the molarity when water is added to 2 moles of sodium chloride to make 0.9 liter of solution?

Thanks 🙂

Thanks so much! This was really helpful! 😀

1 Answer

  • 1.)

    .500(mol/L)*2.00L= X moles of sucrose

    2.) MM=342 (g/mol)

    171 (g)/ 342(g/mol)= x mol of sucrose

    x moles of sucrose/ 1.25 L= Molarity of soultion

    3.) Assuming its 1 g.

    (grams of substance/ (Molar mass))/ Volume in liters= Molarity

    4.)Molarity = moles/Liter

Leave a Reply

Your email address will not be published. Required fields are marked *