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
Akimi4 [234]
2 years ago
8

If 0.25 moles of KBr is dissolved in 0.5 liters of

Chemistry
1 answer:
Len [333]2 years ago
6 0

Answer:

[KBr] = 454.5 m

Explanation:

m is a sort of concentration that indicates the moles of solute which are contianed in 1kg of solvent.

In this case, the moles of solute are 0.25 moles.

Let's determine the mass of solvent in kg.

Density of heavy water, solvent, is 1.1 g/L and our volume is 0.5L.

1.1 g = mass of solvent / 0.5L, according to density.

mass of solvent = 0.5L . 1.1g/L = 0.55 g

We convert the mass to kg → 0.55 g . 1kg /1000g = 5.5×10⁻⁴ kg

m = mol/kg → 0.25 mol /5.5×10⁻⁴ kg = 454.5 m

You might be interested in
What is 7% as a decimal?
Colt1911 [192]
.07! you divide 7 by 100%


6 0
3 years ago
What volume of 12 M HCl solution is needed to make 2.5 L of 1.0 M HCI?
Jlenok [28]

Answer:

0.21 L of 12 M HCL

Explanation:

CV=CV

(12)(x)=(1.0)(2.5)

x=0.21

8 0
3 years ago
Please help i will mark brainliest which helps bring up youre rank
Elis [28]

Answer:

push or pull

Explanation:

3 0
3 years ago
What are the importance of chemistry?​
Yuki888 [10]

Answer:Chemistry is important for meeting our needs of food,clothing,shelter,health,energy,and clan air,water,and soil.

8 0
1 year ago
Which of the following is the Arrhenius equation?<br>​
natka813 [3]

Answer:

A is the answer the reason why is because I got it right when I was doing my test

3 0
2 years ago
Other questions:
  • What is the oxidation number of Mn in KMnO₄? <br> a. -7<br> b. -3<br> c. 0 <br> d. +3 <br> e. +7
    6·1 answer
  • In the evolution of extremely large stars, they begin as supergiants or supernovas, if the star nucleus is large enough it will
    7·2 answers
  • An air temperature of 95°C most often exists in which layer of the atmosphere?
    9·1 answer
  • What should be the mole fraction of sucrose (C12H22O11) in an aqueous solution at 20°C so that the vapor pressure of water above
    10·1 answer
  • A compound that contains both potassium and oxygen formed when potassium metal was burned in oxygen gas. the mass of the compoun
    7·2 answers
  • 5.00 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have a molecular molar mass of 7
    12·1 answer
  • Water is separated into hydrogen and oxygen gas by electrolysis
    7·2 answers
  • The heat exchange in chemical reactions is due to change in
    15·2 answers
  • which factors have the greatest effect on the rate of a chemical reaction between AgNO3(aq) and Cu(s)?
    12·1 answer
  • How many grams of sodium are in 10g. of aodium sulfate
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!