1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Kitty [74]
3 years ago
6

Calculate the molality of a 27.0% (by mass) aqueous solution of nitric acid.

Chemistry
1 answer:
sesenic [268]3 years ago
8 0

Answer is: molality is 5.87 m.

ω(HNO₃) = 27.0% = 0.27.

If we use mass of solution 100 grams:

m(solution) = 100 g.

m(HNO₃) = ω(HNO₃) · m(solution).

m(HNO₃) = 0.27 · 100 g.

m(HNO₃) = 27 g.

n(HNO₃) = m(HNO₃) ÷ M(HNO₃).

n(HNO₃) = 27 g ÷ 63 g/mol.

n(HNO₃) = 0.428 mol.

m(H₂O) = 100 g - 27 g.

m(H₂O) = 73 g ÷ 1000 g/kg.

m(H₂O) = 0.073 kg.

b(solution) = n(HNO₃) ÷ m(H₂O).

b(solution) = 0.428 mol ÷ 0.073 kg.

b(solution) = 5.87 mol/kg = 5.87 m.

You might be interested in
Cells can use the glucose directly, without breaking it down, to carry out cellular processes. True or False?
Akimi4 [234]

Answer:

False

Explanation:

Glucose is a substrate which undergoes various chemical reactions in the mitochondria to produce ATP, which is the universal energy carrier.

6 0
2 years ago
Where else do you see Force & Motion in real-world experiences?
Paladinen [302]

Answer:

a boy pulling a toy train, the boy is

interacting with an object while applying a force to it,

another example of contact forces is friction.

Explanation:

A contact force is when two interacting  

objects

(btw love your pfp)

4 0
3 years ago
Read 2 more answers
Which of the following aqueous solution will have the highest boiling point
Sliva [168]

Ionic molecules have higher boiling point than covalent molecules.

So that leaves Na2SO4 and NaCl.

The ionic molecule with higher charge will have higher boiling point.

Na2SO4 have ions with charge +-2.

NaCl have ions with charge +-1.

So the answer is C.

4 0
3 years ago
If you were asked to convert 4.2 × 1022 atoms of aluminum to moles, which of the following should you use for the conversion?
gregori [183]
You should use Avogadro’s number for the conversion, because Avogadro’s Law states that there are 6.02 x 10^23 atoms per 1 mol of that substance.
4 0
3 years ago
Read 2 more answers
What is the mass, in grams, of 1.4 mol W
algol [13]
Atomic mass W = 183.84 u.m.a

1 mole --------- 183.84
1.4 moles ---- ?

1.4 x 183.84 / 1 = 257.376 g

hope this helps!
3 0
3 years ago
Other questions:
  • What system does the heart go to?
    6·1 answer
  • How many molecules of NaCl are there in 250 grams of table salt
    13·1 answer
  • Do matter take up space?
    13·2 answers
  • An unknown substance was put in a container. The substance filled up the container from the bottom up, taking half of the space
    7·1 answer
  • The Ka of a monoprotic weak acid is 0.00732. What is the percent ionization of a 0.123 M solution of this acid?
    12·1 answer
  • Each of the identical volumetric flasks contains the same solution at two different temperatures. There are two identical volume
    7·1 answer
  • Which type of heat transfer causes a person sitting by the fire to feel warm
    9·2 answers
  • . Which of the following is not a product of photosynthesis?
    13·1 answer
  • 7. Marcie fills a graduated cylinder with 15.0mL of water. Paul finds the mass of a marble to be
    8·1 answer
  • Two physical properties of oxygen gas​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!