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
Alona [7]
3 years ago
7

The molality of a solution that was made by dissolving NaCl in 1.5 kg of water is 0.40 m. If the molar mass of NaCl is 58.44 g/m

ol, what is the mass of NaCl that was dissolved?
0.27 g
23 g
35 g
39 g
Chemistry
2 answers:
kirill115 [55]3 years ago
8 0

Molality is one way of expressing concentration of a solute in a solution. It is expressed as the mole of solute per kilogram of the solvent. To calculate for the mass of the solute in a given solution, we need to calculate first for the number of moles of the substance by the product of the molality and the mass of the solvent. Then, we convert the number of moles into mass by using the molar mass. <span>
</span>

moles NaCl = 0.40 m (1.5 kg water) = 0.6 mol NaCl

mass NaCl = 0.6 mol NaCl ( 58.44 g / mol ) = 35.06 g NaCl

Therefore, the correct answer would be the third option.

lesya692 [45]3 years ago
5 0

Answer: SEE

Explanation: C

You might be interested in
Can someone solve this a put all 3 steps ?
Stolb23 [73]

Answer:

I think the height should be 0.17m

5 0
3 years ago
Which law is associated with interia
victus00 [196]
The law is Newton's first law or called the law of inertia; Which just means that an object at rest stays at rest and an object in motion stays in motion and continues at the same speed and in the same direction unless acted upon by an outside force force.
5 0
3 years ago
Which of the following are second-order reactions? a. C2H6 → 2 CH3 b. 2 N2O5 → 4 NO2 + O2 c. 2 HI → H2 + I2 d. 2 N2O → 2 N2 + O2
Klio2033 [76]

Answer:

The answer is b, c, d, e

Explanation:

b. 2 N2O5 → 4 NO2 + O2

r = k [N2O5]^2 --> Second-order regarding global reaction

c. 2 HI → H2 + I2

r = k [HI]^2 --> Second-order regarding global reaction

d. 2 N2O → 2 N2 + O2

r = k [N2O]^2 --> Second-order regarding global reaction

e. 2 NO2 → 2 NO + O2

r = k [NO2]^2 --> Second-order regarding global reaction

8 0
3 years ago
Can you help please?
Aneli [31]

Answer:

In this reaction, 38.1 grams of copper will be produced.

3 0
3 years ago
A. True <br> b. False a chemical species is either an acid or a base, it cannot function as both
ivann1987 [24]
False They can function as both. An example is Aluminium Oxide. These kind of substances are called "Amphoteric", they can behave as both acids and bases.
3 0
3 years ago
Other questions:
  • Which type of chemical reaction occurs in C6H12+9O2-&gt;6CO2+6Y2K
    5·1 answer
  • A bauxite mining company has got government permission to acquire agricultural land in a location to start surface mining activi
    7·1 answer
  • How many sodium ions are contained in 99.6 mg of na2so3? The molar mass of na2so3 is 126.05 g/mol.
    11·2 answers
  • Thunderclouds and rainstorms come from which type of front
    6·2 answers
  • Which of the following is a pure substance that can be separated by physical means and can’t be decomposed into other substances
    13·1 answer
  • PLEASE HELP!!!<br> The picture is what I need the answers for
    14·1 answer
  • You have 500 grams of phosphorus-32. How much, in grams, will remain radioactive after 71.4 days?​
    15·1 answer
  • I want a examples of Avogardo's law <br>please quickly​
    12·1 answer
  • How does velocity affect the movement of an object?
    6·2 answers
  • Which of the following is most likely to occur due to severe winds during a hurricane?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!