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
KiRa [710]
3 years ago
9

A

Chemistry
1 answer:
deff fn [24]3 years ago
4 0

Answer:

The concentration given here is in terms of molality which is moles of solute per kg of solution.  Therefore, we multiply the concentration by the total mass of the solution and obtain the moles of solute. We can convert this into grams and calculate for the solvent.

0.630 mol KBr / kg solution ( .086 kg solution ) = 0.0542 mol KBr

0.0542 mol Kbr ( 119.002 g / 1 mol ) = 6.4475 g KBr

Mass of solvent = 86 - 6.4475 = 79.55 g water

Explanation:

You might be interested in
How do you get over someone ??
ikadub [295]

Answer:

u just have to delete everything u have of them dont think or talk to them n try to find someone new or just go hangout with friends

5 0
3 years ago
Read 2 more answers
How much N2 is required to fill a small room with a volume of 27,000 L to a pressure of 0.82 atm at 25 °C?
Dmitriy789 [7]

For a volume of 27,000 L to a pressure of 0.82 atm at 25 °C, the amount of N2 is required  is mathematically given as

n=1.1*10^{-3}mole

<h3>What amount of N2 is required to fill a small room with a volume of 27,000 L to a pressure of 0.82 atm at 25 °C?</h3>

Generally, the equation for the ideal gas  is mathematically given as

PV=nRT

Therefore

n=\frac{PV}{RT}\\\\n=\frac{0.980*2700}{0.0821*298}

n=1.1*10^{-3}mole

In conclusion, the amount of N2 is required is

n=1.1*10^{-3}mole

Read more about Molarity

brainly.com/question/9149034

6 0
2 years ago
What is the difference between chemistry and science
sergeinik [125]

Answer:

hi

Explanation:

chemistry the branch of science that deals with the identification of the substances of which matter is composed; the investigation of their properties and the ways in which they interact, combine, and change; and the use of these processes to form new substances.

Science the intellectual and practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment.

8 0
3 years ago
A 0.316 mol sample of nitrogen gas, N2 (g), is placed in a 4.00 L container at 315 K.
dimaraw [331]

2.04 atm is the pressure of the nitrogen gas in the container when 0.316 mol sample of nitrogen gas, N2 (g), is placed in a 4.00 L container at 315 K.

Explanation:

Data given:

moles of nitrogen gas, n = 0.316

volume of the nitrogen gas, V = 4 litres

temperature of the container of nitrogen gas  = 315 K

R (gas constant) = 0.08201 Latm/mole K

Pressure of the nitrogen gas on the container,  P = ?

from the data given, we will apply ideal gas law equation to calculate the pressure on the nitrogen gas:

PV = nRT

Rearranging the equation,

P = \frac{nRT}{V}

P = \frac{0.316 X 0.08201 X 315}{4}

P = 2.04 atm

The pressure of the nitrogen gas in the container is 2.04 atm.

7 0
3 years ago
How is Carbon-12 and Carbon-13 different? What’s is the name that describes these two atoms?
Maslowich

Answer:

Carbon 12 and 13 are carbon isotopes, meaning that they have additional neutrons:

Carbon 12 has exactly 6 protons and 6 neutrons ( hence the 12 )

Carbon 13 has 6 protons and 7 neutrons ( hence the 13 )

They differ in the number of neutrons in the nucleus.

Names:

carbon-13, C-13

carbon-12, C-12

4 0
3 years ago
Other questions:
  • I NEED HELP PLEASE, THANKS! :)
    5·1 answer
  • Based on your answer in Part B, how many electrons are in this amount of 13C? Express your answer numerically in electrons.
    14·1 answer
  • How many of the carbon–carbon bonds in the compound have staggered conformers that are all equally stable?
    12·2 answers
  • Which of the following compounds can be considered a Lewis acid and not a Bronsted-Lowry acid? A acetylene hydronium ion © iron
    8·1 answer
  • What are sodium salts of long-chain fatty acids called?
    6·2 answers
  • How come everytime my mom yells at me i feel myself drift more and more away from life
    10·2 answers
  • 7. What is the maximum amount of NaCl that can be<br> dissolved (in 100g of water) at 90°C?
    9·2 answers
  • A teacher tells the student to dlaw the same wave with double the frequency, while keeping the amplitude the same. How would the
    5·1 answer
  • Which statement describes the condition in which diamonds form?
    12·2 answers
  • What is the density of object A? Does it sink<br> or float in water?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!