4 November, 19:00
A mass of 100.0 g of solute is dissolved in water so that 850. mL of a 0.7500 M solution has been prepared. What is the molar mass of the solute?
4 November, 19:24
156.86 g / mol
We start from the molarity law
Cm = n / V
n = w / M
Cm = (w / M) / V
Cm = w / (M * V)
Cm is the molarity
n number of moles
w a mass of the solute
M is the molar mass of the solute (which is needed)
V the volume of the solution in liters
Then the M can be calculated as following:
M = w / (Cm * V)
M = 100 / (0.75 * 0.85) = 156.86 g / mol
Know the Answer?
New Questions in Chemistry
What the answer too y=7-2x when x is 4
Compare green and red light from the visible spectrum. which has: the longer wavelength? the greater frequency? the greater energy?
What statement describes the effect that the 13th amendment had on american society
Which word is most nearly opposite in meaning to ominous? a. heartening b. threatening c. honest d. devious
Tree a lived for 6 decades and 5 years. Tree b lived for 58 years. Which tree lived longer
» A mass of 100.0 g of solute is dissolved in water so that 850. mL of a 0.7500 M solution has been prepared. What is the molar mass of the solute?