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
Rasek [7]
3 years ago
5

A sample of 0.3283 g of an ionic compound containing the bromide ion (Br−) is dissolved in water and treated with an excess of A

gNO3. If the mass of the AgBr precipitate that forms is 0.7127 g, what is the percent by mass of Br in the original compound?
Chemistry
1 answer:
Pavel [41]3 years ago
4 0

Answer:

92.49 %

Explanation:

We first calculate the number of moles n of AgBr in 0.7127 g

n = m/M where M = molar mass of AgBr = 187.77 g/mol and m = mass of AgBr formed = 0.7127 g

n = m/M = 0.7127g/187.77 g/mol = 0.0038 mol

Since 1 mol of Bromide ion Br⁻ forms 1 mol AgBr, number of moles of Br⁻ formed = 0.0038 mol and

From n = m/M

m = nM . Where m = mass of Bromide ion precipitate and M = Molar mass of Bromine = 79.904 g/mol

m = 0.0038 mol × 79.904 g/mol = 0.3036 g

% Br in compound = m₁/m₂ × 100%

m₁ = mass of Br in compound = m = 0.3036 g (Since the same amount of Br in the compound is the same amount in the precipitate.)

m₂ = mass of compound = 0.3283 g

% Br in compound = m₁/m₂ × 100% = 0.3036/0.3283 × 100% = 0.9249 × 100% = 92.49 %

You might be interested in
Chemically combined substances, such as CO2, NH3, and H20 are called.....
Alex787 [66]
It is d. compounds because they have more than one element.
8 0
3 years ago
Read 2 more answers
What is the difference between a mixture and a compound? (need an easy two sentence answer (able to explain it to a 8 your old).
lina2011 [118]
<span> A </span>mixture<span> is made from </span>two<span> or more substances that are chemically unlike</span><span> and are not chemically joined. A </span>compound<span> is a substance formed when </span>two<span> or more elements chemically react with each other to ... substances because no new substance is formed, therefore they do not </span>have<span> any fixed properties.</span>
6 0
3 years ago
Mass in mg<br> salt<br> sugar<br> chalk<br> sand<br> water
STALIN [3.7K]
Its 470mg k dude or dudette
6 0
3 years ago
Will the calculated Molarity of NaOH be too high or too low or unaffected if the following happen: when you answer the question,
vodomira [7]

Answer:

Explanation:

The result will be affected.

The mass of KHP  weighed out was used to calculate the moles of KHP weighed out (moles = mass/molar mass).

Not all the sample is actually KHP if the KHP is a little moist, so when mass was used to determine the moles of KHP, a higher number of moles than what is actually present would be obtained (because some of that mass was not KHP but it was assumed to be so. Therefore, there is actually a less present number of moles than the certain number that was thought of.

During the titration, NaOH reacts in a 1:1 ratio with KHP. So it was determined that there was the same number of moles of NaOH was the volume used as there were KHP in the mass that was weighed out. Since there was an overestimation in the moles of KHP, then there also would be an overestimation in the number of moles of NaOH.

Thus, NaOH will appear at a higher concentration than it actually is.

7 0
3 years ago
Compare and contrast the atomic structure of the chlorine-35 and chlorine-37 isotopes
katrin [286]

Chlorine-35 and 37 both have the same number of protons. Chlorine-37 has two more neutrons.

hope this helps!

(:

3 0
3 years ago
Other questions:
  • 3CuCl2 + 2Al = 2AlCl3 + 3Cu using the molar ratio between the limiting reactant (aluminum) and the product copper, determine the
    9·1 answer
  • Problem: In each of the following situations, what type of filtration device would you use?
    7·1 answer
  • Geometry and polarity of SnCl2
    6·1 answer
  • 1 a Which type of compounds can be electrolysed? Why?
    8·1 answer
  • What is the most highly populated rotational level of Cl2 (i) 25deg C and (ii) 100 deg C? Take B=0.244cm-1.This question should
    10·1 answer
  • Which of the following diagrams is the correct electron dot diagram for S?
    12·1 answer
  • A sample of CO₂ solid and a sample of CO₂ gas differ in their
    15·1 answer
  • Are all elements created equal? Provide evidence for why or why not.​
    8·1 answer
  • Boyle's Law shows an inverse relationship between:
    10·1 answer
  • Help i'll give Brainliest It's important
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!