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
Vesnalui [34]
2 years ago
6

What masses of kbr and water are needed to produce 300. g of a solution that is 3.00 % by mass?

Chemistry
1 answer:
attashe74 [19]2 years ago
8 0
In a solution of KBr and water; KBr is the solute and water is the solvent;
Therefore; to achieve 3% by mass; it means we are going to have 3% of the mass being the solute and the other 97 % being the solvent.
Thus; KBr (solute) = 3/100 × 300 (total mass) = 9 g
Hence; the appropriate masses will be; 9.00 g of KBr and 291 g of water.
You might be interested in
Pls help
Andrej [43]

Answer:

• None of these

Explanation:

your hand looks too old.

#Rastaman

5 0
2 years ago
Which has more neutrons: Cobalt or Nickel?
Inessa05 [86]

Answer:

Because the most common form of Nickel is Ni-58 while the most common form of Cobalt is Co-59, this means that Cobalt (which is number 27 on the periodic table) has 27 protons and 32 neutrons. Therefore 1 less proton but 2 more neutrons and hence has a greater mass than Nickel.

Explanation:

7 0
2 years ago
A sample liquid is heated in a closed container until it changes to gas.what happens to the size of the particles in the sample
murzikaleks [220]
Nothing happens to these particles when it comes to size however if it were to be speed, the sample would increase.
Fact: The size of a particle will never change!
8 0
3 years ago
Read 2 more answers
Select all of the following equations that represent an exothermic reaction.
masya89 [10]

Answer:

C(graphite) → C(diamond), ΔH = - 0.45 kcal

CH4 + 2O2 → CO2 + 2H2O + 212,800 cal

Explanation:

C(graphite) → C(diamond), ΔH = - 0.45 kcal

CH4 + 2O2 → CO2 + 2H2O + 212,800 cal

These reactions are exothermic reaction because heat is evolved.

The energy changes occur during the bonds formation and bonds breaking.

There are two types of reaction endothermic and exothermic reaction.

Endothermic reactions:

The type of reactions in which energy is absorbed are called endothermic reactions.

In this type of reaction energy needed to break the bond are higher than the energy released during bond formation.

For example:

C + H₂O   →  CO  + H₂

ΔH = +131 kj/mol

it can be written as,

C +  H₂O  + 131 kj/mol  →  CO  + H₂

Exothermic reaction:

The type of reactions in which energy is released are called exothermic reactions.

In this type of reaction energy needed to break the bonds are less than the energy released during the bond formation.

For example:

Chemical equation:

C + O₂   →  CO₂

ΔH = -393 Kj/mol

it can be written as,

C + O₂   →  CO₂ + 393 Kj/mol

6 0
3 years ago
What is absolute dating?
KiRa [710]
Absolute dating is finding the exact date of an artifact such as a fossil using a technique such as radioactive dating, etc.
4 0
3 years ago
Read 2 more answers
Other questions:
  • Rocks formed by changes in heat and pressure or the presence of hot, watery fluids
    7·2 answers
  • Convert 1.76 um to inches
    5·1 answer
  • How many teaspoons equal one tablespoon?
    6·1 answer
  • If measurements are made, then they are more precise on a larger scale.?
    10·1 answer
  • Which elements are considered metals? Non-metals? Metalloids?
    8·1 answer
  • What is the best way to package and preserve a questioned document?
    7·2 answers
  • According to kinetic-molecular theory, which of the following would not be considered an ideal gas? Check all that apply.
    8·2 answers
  • What is the wavelength of electromagnetic radiation with a frequency of 5.00 x 10^12 Hz? S
    6·1 answer
  • What is the momentum of a 0.151 kg baseball that is thrown with a velocity of 28.0 m/s towards first base?​
    15·2 answers
  • A weather balloon was initially at a pressure of 0.900 atm, and its volume was 35.0 L. The pressure decreased to 0.750 atm, with
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!