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
Vlad1618 [11]
2 years ago
10

How many grams of KOH are needed to make 0.500 L of a 0.10 M solution

Chemistry
1 answer:
Zolol [24]2 years ago
6 0

Answer:

2.8 g KOH

Explanation:

We can find the amount of moles we need by multiplying 0.500 L and the molarity given, 0.10 M (molarity is moles of solute divided by liters of solution). The liters cancel out, leaving us with moles; we can then take the moles and convert it to grams of KOH by using the molar mass of KOH.

0.500 L x 0.10 mol/1 L x 56.106 g /1 mol = 2.8 g KOH (two significant figures)

You might be interested in
Help me :( plzzzz :(
Lelu [443]

Answer: 1.80

Explanation:

4 0
3 years ago
a sample of the hydrate of sodium carbonate has a mass of 8.85 g. it loses 1.28 g when heated. find the molar ratio of this comp
xenn [34]

Answer:

Molar ratio of the compound is 1:1 and the type of hydrate is Mono hydrate.

Explanation:

From the given,

Mass of sodium carbonate Na_{2}CO_{3}.XH_{2}O = 8.85 g

Loss mass H_{2}O = 1.28 g

Actual weight of sodium carbonate = 8.85 g - 1.28 g = 7.57 g

7.57 g Na_{2}CO_{3} \times \frac{1mol}{106 g} =\frac{0.0714}{0.0714}=1

1.28g H_{2}O \times \frac{1mol}{18 g} =\frac{0.0711}{0.0714}=1

Therefore, the compound has only one water molecule.

Molecular formula of the compound is Na_{2}CO_{3}.H_{2}O an name of the compound is <u>sodium carbonate mono hydrate.</u>

Hence, the type of the compound is Mono hydrate.

8 0
3 years ago
EMERGENCY: PLS HELP OR I WILL FAIL I WILL MARK BRAINLIEST!!
Levart [38]

Answer:

hope it helps

Explanation:

6 0
2 years ago
Read 2 more answers
Scientist use instruments to record the strength of earthquakes
labwork [276]

Answer:

Seismographs

Explanation:

7 0
3 years ago
Can anyone explain why the mongols invaded russia?
Svetach [21]

.dhdwbhdxqbsajxnx n sg

5 0
2 years ago
Read 2 more answers
Other questions:
  • What would be the best technique to separate an insoluble solid from a liquid, like sand from water?
    13·2 answers
  • When a substance cools down, is it releasing or absorbing energy?
    12·1 answer
  • What concentration of the lead ion, pb2+, must be exceeded to precipitate pbf2 from a solution that is 1.00×10−2 m in the fluori
    11·1 answer
  • What is a type of force that will change an objects motion
    12·1 answer
  • The heat required to raise the temperature of 12g of water from 16 C to 21 C is:
    6·2 answers
  • What makes up nearly all of the atom's mass?
    15·2 answers
  • A neutral atom of sodium has 11 protons. Use this information explain the total number of electrons that are in sodium
    6·2 answers
  • How many atoms are there in 4500 grams of sulfur(s)?plaease help
    8·1 answer
  • A sample of 54.78 liters of H2 would have a mass of
    9·1 answer
  • Amines are ________. brønsted-lowry bases brønsted-lowry acids neutral in water solution unreactive
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!