ttyllthyx8456 ttyllthyx8456
  • 01-08-2017
  • Chemistry
contestada

20 g of nh4cl is added to 13.9 g of water. calculate the molality of the solution.

Respuesta :

Willchemistry
Willchemistry Willchemistry
  • 02-08-2017
Molar mass NH4Cl = 53.491 g/mol

number of moles solute :

n = m / mm

n = 20 / 53.491

n = 0.373 moles

solvent in kg :

13.9 / 1000 => 0.0139 kg 

Therefore:

m = moles / volume

m = 0.373/ 0.0139

=> 26.83 molal
Answer Link

Otras preguntas

Where and when did Martin Luther King Jr. die?
ray wants the larger of two aquariums.One aquarium has 20 in. by 20 in. and has a height of 18 inches.The other aquarium has a base that is 40 in. by 12in. and
What is the velocity of an object that has a mass of 2.5 kilogram and a momentum of 1,000 kg·m/sec?
Serous membrane is what type? Epithelial or connective?
where are chromosomes found in eukaryotic cells
Where and when did Martin Luther King Jr. die?
a rectangle has an area of 30 square meters and a perimeter of 34 meters. what are the dimensions of the rectangle?
Two numbers have a product of 48 and a sum of 19 what are the numbers and how do you know
a rectangle has an area of 30 square meters and a perimeter of 34 meters. what are the dimensions of the rectangle?
What is the velocity of an object that has a mass of 2.5 kilogram and a momentum of 1,000 kg·m/sec?