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
asambeis [7]
3 years ago
7

How many grams of solid K2CO3 are needed to prepare 150. mL of a 0.50% by volume K2CO3 solution ?

Chemistry
1 answer:
serg [7]3 years ago
3 0

Answer:

0.75 g of K2CO3

Explanation:

  • To prepare 150. mL of a 0.50% by volume K2CO3 solution;
  • It means 0.5% w/v in 150 mL.
  • Therefore, there would be 0.5 of K2CO3 in 100 mL of the solution.
  • Taking the density of the solution to be equivalent to the density of water, that is, 1 g/ml.
  • The mass of the solution will be; 150 mL × 1 g/mL = 150 g

Therefore; the mass of K2CO3 will be;

  = 0.5/100 × 150 g

  = 0.75 g

You might be interested in
What causes water to increase in density?
murzikaleks [220]

Explanation:

temperature changes affect seawater density as water cools its density increases. As water cools H2O molecules pack more closely together because the molecules are vibrating less at low temperatures and take up less volume. The same number of water molecules in smaller volume results higher density

3 0
3 years ago
Read 2 more answers
What is the heliosheath?
Andru [333]

Answer:

The heliosphere is the vast, bubble-like region of space that surrounds and is created by the Sun.

6 0
2 years ago
If an acid/base dissociates completely in water what type of substance is it? Does this mean the acid/base is dangerous?
hram777 [196]

Answer:

1 strong acid

2 yes they are dangerous

Explanation:

Since nearly all of it is dissociated in water, it is called a strong acid.

2 yes Concentrated strong acids can cause severe and painful burns. The pain is due in part to the formation of a protein layer, which resists further penetration of the acid

3 0
3 years ago
Changing a solid to a liquid to a gas is changing the<br> matter.<br> *<br> Your answer
sukhopar [10]

Answer:

i could help you can you explain more plzzzzzz i really need points

Explanation:

6 0
2 years ago
Read 2 more answers
I need help with #10 (a,b and c) please and thank you!
Sidana [21]

a. An oxidation reaction. An oxidation reaction is a type of chemical reaction that involves a transfer of electrons between two species.

6 0
3 years ago
Other questions:
  • Help please someone
    8·1 answer
  • 29 Positrons and beta particles have(1) the same charge and the same mass
    11·1 answer
  • a problem or issue in a human or natural environment caused by chemical reactions. Plz give me the URL as well.
    9·1 answer
  • I NEED HELP PLEASE!!
    8·1 answer
  • Please help me!!!!!!!!
    10·1 answer
  • If calcium carbonate (CaCO3) decomposes, what would the product of the reaction be?
    13·2 answers
  • Generally, does the size of a radioactive sample affect half-life?
    8·2 answers
  • Which one of these is not a pathogen?
    10·1 answer
  • What neutral element has 17 electrons an 18 neutrons?
    5·2 answers
  • What happens to the molecules of a gas when the gas is heated?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!