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
34kurt
3 years ago
11

How many grams of kbr are required to make 350. ml of a 0.115 m kbr solution? 3.04 g 4.79 g 40.3 g 0.338 g?

Chemistry
2 answers:
RUDIKE [14]3 years ago
7 0
The answer is 4.79g also add me on snap:at jessea7772
MakcuM [25]3 years ago
5 0

 

\boxed{\text{4.79 g}} of KBr is required to make 350 mL of 0.115 M KBr solution.

Further Explanation:

Concentration is defined as the amount or quantity of solute present in specific amount of solution. In order to evaluate concentration of various solutions, different concentration terms are used. Some of these are mentioned below.

1. Molarity (M)

2. Molality (m)  

3. Mole fraction (X)  

4. Parts per million (ppm)  

5. Mass percent ((w/w) %)  

6. Volume percent ((v/v) %)  

Molarity is defined as the number of moles of solute that can be dissolved in one litre of the solution. It is denoted by M and its unit is mol/L.

The formula to calculate molarity of KBr solution is as follows:

  \text{Molarity of KBr solution}=\dfrac{\text{Moles of KBr}}{\text{Volume (L) of KBr solution}}  ...... (1)

Rearrange equation (1) to calculate moles of KBr.

\begin{aligned}{\text{Moles of KBr}&=\left[{(\text{Molarity of KBr solution})\\&\text{ }\text{ }\text{ }(\text{Volume (L) of KBr solution})]\right]\end{aligned}}        ...... (2)

Substitute 0.115 M for molarity of KBr solution and 350 mL for volume of KBr  solution in equation (2).

\begin{aligned}\text{Moles of KBr}&=(\text{0.115 M})(\text{350 mL)}\left(\dfrac{\text{10}^{-3}\text{ L}}{\text{1 mL}}\right)\\&=\text{0.04025 mol}\end{aligned}

The formula to calculate moles of KBr is as follows:

\text{Moles of KBr}=\dfrac{\text{Mass of KBr}}{\text{Molar mass of KBr}}                                       ...... (3)

Rearrange equation (3) for mass of KBr.

\text{Mass of KBr}=(\text{Moles of KBr})(\text{Molar mass of KBr})               ...... (4)

Substitute 0.04025 mol for moles of KBr and 119.002 g/mol for molar mass of KBr in equation (4).

\begin{aligned}{\text{Mass of KBr}&=(\text{0.004025 mol})(\text{119.002 g/mol})\\&=\text{4.79 g}}\end{aligned}

Therefore 4.79 g of KBr is required to make 350 mL of a 0.115 M KBr solution.

Learn more:

1. Determine the moles of water produced: brainly.com/question/1405182

2. What is the molarity of the stock solution? brainly.com/question/2814870

Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Concentration terms

Keywords: molarity, KBr, 350 mL, 0.115 M, 4.79 g, mass, molar mass, concentration terms, concentration, solute, moles of solute, volume.

You might be interested in
Two different atoms have four protons each and the same mass. However, one has a positive charge while the other is neutral. Des
seraphim [82]

The possible number and location of all subatomic are one of them is electrically neutral, while the other has a stable electronic configuration.

<h3>What are subatomic particles?</h3>

Subatomic particles are those particles that are present inside the atoms. They are electron, neutron, and proton. They are charged particles, protons are positively charged, electrons are negatively charged and neutrons are neutral.

The protons and electrons totally contribute to the atomic mass of the elements.

Thus, the subatomic particles are electrically neutral and stable to electronic configurations.

To learn more about subatomic particles, refer to the below link:

brainly.com/question/13303285

#SPJ1

8 0
1 year ago
How was or wasn't the scientific method followed in this experment
Andreas93 [3]

Answer:

The best answer would be:

C. The scientific method was followed because the experiment tested the hypothesis and produced reliable results.

Explanation:

The purpose of an experiment is to test the hypothesis. It is true that having an experimental group and a control group was following the scientific method but the data gathering and documentation was also part of the scientific method. So the best answer would be C.

Writing the question is not necessary. It is merely part of forming a hypothesis. The scientific method does not require many scientists to perform the experiment, but it does require that the experiment be repeatable, so it can be tested again.

3 0
3 years ago
The formula for ammonium carbonate:
Dima020 [189]

Ammonium is NH₄⁺ and Carbonate is CO₃⁻² => Ammonium Carbonate is (NH₄)₂CO₃

6 0
3 years ago
H2O and C6H12O6 are examples of ______
ruslelena [56]

Compounds. They both have more than one element in them

4 0
3 years ago
Describe how the catalyst, zymase speeds up the reaction shown
Vlad1618 [11]

Describe how the catalyst, zymase speeds up the reaction shown

The catalyst zymase speeds up the reaction by catalyzing the fermentation of sugar into ethanol and carbon dioxide. It is mostly present in yeasts. 

7 0
2 years ago
Other questions:
  • What is the last step in the Scientific method?
    14·2 answers
  • How are a mole and a dozen similar​
    12·1 answer
  • Ghjhikkbnmkkkjjjjhnnmnn
    15·1 answer
  • What's the answer ???
    13·1 answer
  • What mass of HCl is needed to prepare 1.00 mole of Cl₂? 2 KMnO₄ + 16 HCl → 2MnCl₂ + 5 Cl₂ + 8 H₂O + 2 KCl
    7·1 answer
  • How does a lightning rod protect a<br> building from lightning damage?
    12·2 answers
  • Does a fish's scales shred as the fish grows larger
    7·1 answer
  • How many grams of CO2 would be made from 3.0 g of C6H6? Please no links
    13·1 answer
  • In a nuclear power plant, what is the purpose of the cooling tower?
    10·1 answer
  • Amy found a volume of red liquid to be 55.1 ml, and have a mass of 8.199g. What is the density of her
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!