Q: What is the molarity of a solution f KNO3(molecular mass=101) that contains 404 grams of KNO3 in 2.00 liters of solution?
1)1.00
2)2.00
3)0.500
4)4.00
Q: As a liquid boils at its normal boiling point, its temperature
1 decreases
2 increases
3 remains the same
Thanks
Robert D
Favorite Answer
molarity = moles solute/Liters of solution
moles KNO3 = 404 g(1 mole)/(101 g) = 4.00 mole
Solution volume = 2.00 L
molarity = 4.00 mole/2.00 L = 2.00 M
The answer is 2)
As the liquid boils all of the heat input into the liquid goes into converting the liquid to its vapor. So, as it boils the temperature remains the same.
Answer is 3) remains the same.
Hope this is helpful to you. JIL HIR