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
sladkih [1.3K]
3 years ago
5

If the reaction of 9.87 moles of potassium with excess hydrobromic acid produced a 79.8% yield of hydrogen gas, what was the act

ual yield of hydrogen gas? unbalanced equation: k + hbr yields kbr + h2
Chemistry
1 answer:
Fed [463]3 years ago
7 0
Answer is: 3,94 of hydrogen gas.
Chemical reaction: 2K + 2HBr → 2KBr + H₂.
n(K) = 9,87 mol.
n(H₂) = ?.
from reaction: n(K) : n(H₂) = 2 : 1.
9,87 mol : n(H₂) = 2 : 1
n(H₂) = 4,935 mol for 100% yield of reaction
n(H₂) = 4,935 · 0,798 = 3,94 mol for 78,9 % yield of reaction.
n - amount of substance
You might be interested in
What types of compounds do not dissolve in water?
Nataliya [291]
Oil doesn't dissolve in water, which could be your answer.
8 0
3 years ago
The stem of a plant is made of several types of tissue that work together.
jeka94
Answer is tissue - :)
3 0
3 years ago
Explain that : how we explore different between Licl and Nacl
Leona [35]

Answer:

See the explanation below, please.

Explanation:

In the bunsen burner, the gas and air inlet can be regulated manually. In the case of metals (such as lithium and sodium in this case) they contain an electron in the latter in its external electronic configuration. They are characterized by transferring electrons easily and produce the emission of light when excited, producing flames of different colors in the lighter (orange for sodium and red / scarlet for lithium)

8 0
3 years ago
002 (part 1 of 2) 10.0 points
BARSIC [14]

Answer:

4) 1.5 mol

Explanation:

Well, the equation is already balanced and the mole to mole ratio of reactants and products are all 1. So if the limiting reactant is HCl and you have 1.5 mol, you do the mole to mole ratio with NaCl and since it is 1 to 1, there'd be 1.5 mol of NaCl.

6 0
3 years ago
A covalent bond forms a(n) ______________.
DiKsa [7]
The answer is Molecule. After a pair of shared electrons orbit around the nuclei of both atoms
3 0
2 years ago
Read 2 more answers
Other questions:
  • What are the major products when glucose is broken down in glycolysis?
    13·1 answer
  • How are sucrose (table sugar) and the starch in flour chemically related? what makes them different from each other?
    12·1 answer
  • Identify the trend in bond length of the hydrogen-halide molecule and explain why it exists.​
    13·1 answer
  • What is the concentration of a solution made by dissolving 0.99mol of acetic acid in enough water to make 0.58L of solution?
    5·1 answer
  • Which statement best describes what happens during a chemical reaction?
    9·1 answer
  • Which of the following equations is balanced?
    9·1 answer
  • What is true of all atoms?
    5·2 answers
  • The chemical equation of the reaction between Hydrogen and Oxygen is given below
    7·1 answer
  • Molecules that are too large to flow across the<br> membrane need help from what structures?
    15·2 answers
  • At constant P and n, T decreases at V is?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!