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
weeeeeb [17]
3 years ago
5

How many grams of KOH are required to prepare 500. mL of 0.450 KOH solution?

Chemistry
1 answer:
Digiron [165]3 years ago
5 0

Answer:

KOH  molar mass = 39 + 16 + 1 = 56g

To make 1 L of 1M soln needs 56g KOH

To make 500mL 1M needs 56/2 = 28g

To make 500mL 0.2M needs 28 x 0.2gn:

You might be interested in
How to prepare 250.00 ml of approximately 1.0 m hcl solution from the 2.5 m hcl solutio?
kirill115 [55]

To solve this we use the equation, 

M1V1 = M2V2

where M1 is the concentration of the stock solution, V1 is the volume of the stock solution, M2 is the concentration of the new solution and V2 is its volume.

2.5 M x V1 = 1.0 M x .250 L

<span>V1 = 0.10 L or 100 mL of the 2.5 M HCl solution is needed

Hope this helps.</span>
4 0
3 years ago
Read 2 more answers
What is the temperature of 0.5 moles of water vapor that occupies 120 dm3 and applies a pressure of 15,000 Pa to its container?
AleksandrR [38]

Answer:

The answer is C. 7.52 K

Explanation:

hope it helps

6 0
3 years ago
Which of the following describes scientists?
jasenka [17]

Answer:C.people with perfect understanding of science.

3 0
3 years ago
Read 2 more answers
Where on the table would a group's<br> ionization energy be the greatest?
Ymorist [56]

Answer:

upper left

Explanation:

it is a trend on the periodic table. Ionization energy increases from left to right(->) I t also increases down to up

5 0
3 years ago
Which type of rock might be useful as a source of petroleum?
storchak [24]

Answer:

petroleum rocks

Explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • The process by which a semipermeable membrane allows water molecules, small molecules, and ions to pass through while retaining
    11·1 answer
  • The wavelength of a light wave can be used to measure which of the following?
    12·1 answer
  • Which of the following collection is the more positive view of life and society in Blake's time?
    5·2 answers
  • Question 11 (1 point)
    5·1 answer
  • White vinegar is available as a 5% acetic acid solution and a 10% solution, by volume. How many millilitres of each solution mus
    15·1 answer
  • How many atoms are there in a molecule?
    6·1 answer
  • Please help due today!
    7·1 answer
  • What can cause heat exhaustion?
    10·1 answer
  • Similar figures have the same ______ but different ______.
    10·2 answers
  • A reaction is in ____________ kinetics when the reaction rate depends only on enzyme concentration
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!