Question

If you are given 40 grams of a dye that has a molar mass of 200 g/mole and then place it in 2

liters of water, what is the molarity of the resulting solution?
A2M
B 0.1 M
C 1M
D2M

Answer 1

B

Step-by-step explanation:

to find how many moles we have you need to use the molarity equation which for this is

40g * (1mole/200g) = .2 moles

Given we know that we have .2 moles

then all you have to do is divide amount of moles by amount of liters to find the molarity

for this problem it is

.2mol/2L which is .1 M