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
ankoles [38]
3 years ago
13

A 5.18-g sample of a mixture of MgBr2(s) and sucrose (C12H22O11) is dissolved in water and all the bromide is precipitated as Ag

Br(s). If the AgBr(s) precipitate has a mass of 7.65 g, what is the mass percent of MgBr2(s) in the mixture?
Chemistry
1 answer:
vazorg [7]3 years ago
6 0

Answer: 62.8%

Explanation:

step 1: Calculate the number of moles (n) for AgBr.

n(AgBr) = mass(AgBr) / Molar mass(AgBr)

             = (7.65g) / (187.77g/mol)

             = 0.0407 mol

step 2: Determine the number of moles of Br in AgBr.

1 mol AgBr = 1 mol of Br

therefore; n(Br) = 0.0407mol

step 3: Calculate the mass of Br precipitated.

m(Br) = n(Br) × Molar mass(Br)

          = (0.0407 mol) / (79.904g/mol)

          = 3.255g

step 4: Calculate the mass percent of MgBr₂.

%MgBr₂ = mass(Br) / mass(MgBr₂ + C₁₂H₂₂O₁₁) × 100

              = (3.225g / 5.18g) × 100

              = 62.8%

You might be interested in
Mr. Cortez asked his students to give examples in which electrical energy is transformed into heat. Students worked in a small g
Lunna [17]
You have to post the table
7 0
3 years ago
Read 2 more answers
If you add MeOH to CoCl2(Alc)2, the CoCl2(Alc)2 concentration will change. What are the two reasons for this concentration chang
Bond [772]
There are two reasons that account for the change in concentration. One is by the physical change and second is by the chemical change. The physical change refers to the mixture of the two compounds. The concentration is the amount of that certain substance to the whole mixture. Since the mixture increases because you add them up, the concentration decreases. Second, these compounds react with each other once they interact. Hence, their amounts would be consumed in order to produce the products.
4 0
3 years ago
Heat is added to a chemical system. Which energy will increase?
dmitriy555 [2]

Answer:

the kinetic energy of the reactant molecules(C)

Explanation: i hope this is the correct answer if this is wrong or incorrect please let me know

8 0
2 years ago
Read 2 more answers
Looking at page 14 of the earth science tables, how does the temperature change as a balloon rises through the Troposphere Strat
givi [52]

Answer:

Decreases

Explanation:

The temperature decreases when latitude increases.

5 0
2 years ago
1. The forks shown are made of silver (Ag). Some of the silver forks
Anon25 [30]

Answer:

Corrosion

Explanation:

Silver, although known as a nobble metal, is also subject to corrosion process such as having silver tarnish when exposed to sulfur and air.

Tarnishing occurs on the surfaces of some metals such as brass, copper, and silver, which results in a corroded layer. Silver tarnish occurs from the chemical reaction that takes place when silver is exposed to sulfur which results in the formation of black Ag₂S

In order to restore the original silver surface, the silver tarnish (silver sulfide) layer is removed.

We have the statement presented here as follows;

The forks shown are made of silver (Ag). Some of the silver forks shown have lost their luster - they have become tarnished. This is an example of <u>Corrosion.</u>

4 0
2 years ago
Other questions:
  • HELP! I will give brainliest for correct answer
    12·1 answer
  • If a liter of solution is needed, how many grams of ethanol, C2H6O will be added when a scientist creates a 0.25 molal solution?
    10·1 answer
  • which shape has a larger area: a rectangle that is 7 inches by 3/4 inch, or a square with side length of 2 1/2 inches? show your
    15·2 answers
  • A(n) 816 ml sample of hydrogen was collected over water at 21.0◦c on a day when the barometric pressure was 755 torr. what volum
    14·1 answer
  • Bob is cleaning his dishwasher with white vinegar by putting a bowl of this ____________ mixture in the top of an empty dishwash
    15·1 answer
  • If 1.0 liters of 0.40 M KOH are<br>diluted to 3.0 liters what is the<br>new concentration?​
    10·1 answer
  • List the following elements in order of INcreasing number of valence electrons: C, Cl, As, Na, He
    11·1 answer
  • What is the result of 2.58×0.12, including correct significant figures? Select the correct answer below: 0.3096 0.31 0.310 0.3
    5·2 answers
  • A swimmer is moving at a speed of 2.0 meters/second. How long will it take for the swimmer to go 100 meters?
    7·1 answer
  • SOMEONE PLEASE HELP HURRY
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!