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
Rasek [7]
3 years ago
7

A chemist prepares a solution of pottasium bromide KBr by measuring out 224.g of pottasium bromide into a 300.mL volumetric flas

k and filling the flask to the mark with water. Calculate the concentration in mo/L of the chemist's pottasium bromide solution. Round your answer to 3 significant digits.

Chemistry
2 answers:
avanturin [10]3 years ago
8 0

Explanation:

Below is an attachment containing the solution.

rjkz [21]3 years ago
6 0

Answer:

The concentration of the KBr solution is 6.27 mol/L

Explanation:

Step 1: Data given

Mass of KBr = 224 grams

Molar mass KBr = 119.0 g/mol

Volume = 300 mL = 0.300 L

Step 2: Calculate moles KBr

Moles KBr = mass KBr / molar mass KBr

Moles KBr = 224 grams / 119.0 g/mol

Moles KBr = 1.88 moles

Step 3: Calculate concentration KBr solution

Concentration solution = moles KBr / volume

Concentration solution = 1.88 moles / 0.300 L

Concentration solution = 6.27 mol / L

The concentration of the KBr solution is 6.27 mol/L

You might be interested in
Chlorine gas reacts with aluminum metal producing aluminum chloride. What mass of chlorine reacts with 9.00g of Al to form AlCl3
Anit [1.1K]
The  mass of  chlorine   that react  with  9.00 g  of Al to form AlCl3  is   35.465  grams

     Explanation
write  the equation  for  reaction
that is
2 Al +  3 Cl2  = 2 Al CL3
find  the moles  of    Al  reacted

moles = mass/molar mass

  9 g/ 27  g/mol = 0.333  moles  of Al

by use  of mole ratio between   Al to  Cl2    which is  2:3   find the moles of  Cl2

mole  of cl2 =  0.333 x3/2 = 0.4995  moles


mass of  Cl2  is therefore =  moles  x  molar mass

= 0.4995  x71 =  35.465  moles




6 0
3 years ago
Which of these equations is balanced? a. H2SO4 + 2Al → Al2(SO4)3 + H2 b. 2KCl + Pb(NO3)2 → 2KNO3 + PbCl2
Lapatulllka [165]
The answer is B, you just check if it is the same on the left and right side

A:
Left side - Right side
2xH - 2xH
1xS - 3xS
4xO - 12xO
2xAl - 2xAl

Therefore A is not correct

B:
Left side - right side
2xK - 2xK
1xCl - 1xCl
1xPb - 1xPb
2xN - 2xN
6xO - 6xO

B is therefore correct as both sides add up
6 0
3 years ago
Read 2 more answers
Explain how a nuclear power plant functions and what safety precautions must be taken to ensure the safety of the power plant, i
Talja [164]
Nuclear energy originates from the splitting of uranium atoms – a process called fission. This generates heat to produce steam, which is used by a turbine generator to generate electricity. Although renewable energy sources, like wind and solar power, are important resources for a country’s energy mix, only nuclear power is capable of producing large amounts of electricity 24 hours a day, 365 days a year.

For safety precaution which regards to employees, several federal agencies—the US Nuclear Regulatory Commission (NRC), the U.S. Environmental Protection Agency and the U.S. departments of Energy and Transportation—establish radiation protection regulations for U.S. nuclear plants based on internationally recognized scientific studies.

For the safety precaution of power plants itself, The NRC monitors plant performance according to three strategic areas: reactor safety, radiation safety and security.




7 0
3 years ago
Read 2 more answers
What is the equation for the dehydration of the CoCl2 hydrate?
natulia [17]
The dehydration of the CoCl₂ hydrate is as follows:

CoCl₂l•6H₂O(s) + heat --> CoCl₂(s) + 6H₂O(g)
3 0
3 years ago
What does not happen when the temperature is increased ?
Alex_Xolod [135]
More particles collide in the correct orientation​
8 0
2 years ago
Read 2 more answers
Other questions:
  • Is a television remote ac or dc
    10·1 answer
  • What is the oxidation number for ba??
    9·1 answer
  • What type of bonding holds the atoms in an h2o molecule together?
    9·1 answer
  • How to solve 5gNaCl= MolE NaCl
    15·1 answer
  • What will happen as the excited electron of arsenic atoms return to lower energy levels?
    9·1 answer
  • 2. A 90 g bag of trail mix is contains 22% nuts, 35% granola, 18% dried fruit. The rest is chocolate chips.
    5·1 answer
  • Name the type of ion formed by the atom when it loses three electrons. Show by illustration
    10·2 answers
  • What variables affect mass? (include observations)​
    11·1 answer
  • If the density of carbon tetrachloride is 0.893 g/mL, and a sample has a volume of 9.29 mL, what is the mass?
    11·1 answer
  • IT DUE TODAY WILL GIVE 100 BRAINLY POINTS AND BRAINLEST IF YOU HELP THIS IS FOR SCIENCE CLASSThis project will allow you to “see
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!