lauralanhamalex lauralanhamalex

22-09-2017
Chemistry

contestada

What is the boiling point elevation when ammonia (NH3) is dissolved in water to form a 3.5 molal solution? Kb for water is 0.52 °C / m.

Respuesta :

laurenascough laurenascough

22-09-2017

No. of moles of ammonia: 11.4/(14+3) = 0.671mol
molality of solution: 0.671/0.2 = 3.35mol/kg
Change in temp: Kb x molality = 0.52x 3.35=1.74

Hope this helps :)

Answer Link

Otras preguntas

Stacy and Neil painted 280 ft2 of their living room wall with 45 gallon of paint. How many square feet can they paint with 3 gallons of paint?

In our circulatory system, blood transports blood cells and dissolved ions when it moves through the body. Which of the following terms is suitable for blood?

What is the purpose of the myelin sheath?

"Bartleby, el escribiente" 1) ¿Por qué decimos que el narrador no es un jefe convencional? Transcribí 3 citas que lo muestren. 2) Transcribí dos citas que mues

What words do you put before a sentence to make it a question?

How do you solve -2z-xy=x+7 for x

An object must be immersed in quat for at least how many seconds to be considered sanitized?

Does there exist a pair of consecutive even integers whose reciprocals sum to 3/4? Explain how you know.

The partially filled contingency table gives the frequencies of the data on age (in years) and sex from the residents of a retirement home. 60-69 70-79 Over 79

A bike rental stand at the beach charges $5 to rent a bike in targit charges to every half hour it is rented if someone pays $17 for the rental how long do they