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
HACTEHA [7]
3 years ago
13

Concentrated nitric acid has a molarity of 15.9 M and a density of 1.42 g/mL. Calculate the following concentrations using 1.00

L of HNO3.
a) % by mass
b) molality
c) mole fraction
Advanced Placement (AP)
1 answer:
MrMuchimi3 years ago
7 0

Answer: a) percent by mass = 70.5\%

b) molality = 38.01mol/kg

c) mole fraction = 0.40

Explanation:

Given molarity = 15.9 M

moles of HNO_3 = 15.9 moles in 1.00 L of solution

mass of HNO_3 = moles\times {\text {Molar mass}}=15.9mol\times 63g/mol=1001.7g

Density of solution of = 1.42 g/ml

Volume of solution = 1.00 L = 1000 ml

Mass of solution = Density\times volume= 1.42g/ml\times 1000ml=1420g

mass of solvent = mass of solution - mass of solute = (1420-1001.7) g = 418.3 g = 0.4183 kg

moles of solvent = \frac{\text {given mass}}{\text {Molar mass}}=\frac{418.3g}{18g/mol}=23.2mol

percent by mass =\frac{\text {mass of nitric acid}}{\text {mass of solution}}\times 100=\frac{1001.2}{1420}\times 100=70.5\%

molality = \frac{\text {no of moles of solute}}{\text {mass of solvent in kg}}=\frac{15.9mol}{0.4183kg}=38.01mol/kg

mole fraction = \frac{\text {moles of solute}}{\text {total moles}}=\frac{15.9}{15.9+23.2}=0.40

You might be interested in
The time required for epoxy-resin cement to set is about A. 4 hrs. B. 2 hrs. C. 3 hrs. D. 1 hr.
Butoxors [25]
It would be A. 4 hrs
7 0
3 years ago
What is encoding failure
Y_Kistochka [10]

Encoding Failure refers to the brain's occasional failure to create a memory link.

7 0
3 years ago
Read 2 more answers
1. The government of Brazil moved its capital city in 1960. Explain the reasons for this decision, and describe its effects on i
Alona [7]

Answer and Explanation:

1. The capital of Brazil was changed on April 21, 1960 by the president Jucelino Kubitschek, who built a city, called Brazilia, to become the country's federal capital instead of Rio de Janeiro, which was the old capital. He did this because Rio de Janeiro is very close to the ocean and he believed that it left the capital vulnerable to marine attacks, for this reason, he decided to move the capital to a more central region of the country, where it would be more protected.

2. Internal migration in Brazil occurs mainly due to economic factors, where citizens from the poorest states and with the worst living conditions (northeastern states) migrate to the producing centers of the country, which are the southeastern states, mainly São Paulo. Internal migration in China also has the economic condition as its main reason, however the Chinese are constantly migrating to the country's capital and need to submit to a series of laws and guidelines, while in Brazil, this process is done without any type of legislation or restriction.

8 0
3 years ago
Read 2 more answers
What type of outcomes does prison represent (positive reinforcement, negative reinforcement, positive punishment, negative punis
Luden [163]

Answer:

negative punishment

Explanation:

Punishment  (positive or negative) decreases the chances that a particular behavioral reoccurs.

Handing a prison sentence to anyone that offends the laws of the state is an example of negative punishment based on available research. This is because, serving a prison sentence makes it more likely that the convict will commit the same crime again.

While many experts in criminal justice have observed that many ex-convicts tend to re-offend, the principles of positive punishment for convicts have been set out by Peter B. Wood in his paper titled "Exploring the Positive Punishment Effect Among Incarcerated Adult Offenders

"; American Journal of Criminal Justice 31(2):8-22; 2007; .

In his submission;

<em> "As the U.S. has pursued a policy of mass imprisonment for nearly  three decades, now boasts the highest incarceration rate in the world and returns  nearly 800,000 ex-convicts into our communities each year, more attention to this  issue is called for-particularly since it could be argued that, for many offenders,  criminal justice punishments promote future offending."</em>

5 0
3 years ago
What is money that has been spent and cannot be recovered?
const2013 [10]
The answer is "Sunk Cost."

5 0
3 years ago
Other questions:
  • I really need help, when dealing with research what does ethical concern mean?
    5·2 answers
  • What kind of learner understands how the body works
    6·2 answers
  • List three main differences between the German and Scots-irish immigrants.
    10·2 answers
  • Sarabeth used a box-and-whisker plot to summarize her race times in minutes. She didn't include her latest race time of 28 minut
    8·1 answer
  • Para elaborar um espaço de brinquedoteca devemos levar em consideração algumas características que podem mudar sua estrutura. Ne
    15·1 answer
  • Do students that are planning to apply to an early college high school need to pass an SAT/ACT to get in?
    10·2 answers
  • How would you solve 27?
    14·1 answer
  • What part of the brain does learning a new language strengthens? action. thought. memory. all of the above​
    9·1 answer
  • What happened in the Scopes Monkey Trial?
    14·1 answer
  • If you are offered a job at an interview, you should _____. A. Ask for at least one day to think it over b. Say yes immediately
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!