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
dlinn [17]
3 years ago
8

An oxybromate compound, kbrox, where x is unknown, is analyzed and found to contain 43.66 % br.

Chemistry
1 answer:
aniked [119]3 years ago
6 0

Answer is: an oxybromate compound is KBrO₄ (x = 4).

ω(Br) = 43.66% ÷ 100%.

ω(Br) = 0.4366; mass percentage of bromine.

If we take 100 grams of compound:

m(Br) = ω(Br) · 100 g.

m(Br) = 0.4366 · 100 g.

m(Br) = 43.66 g; mass of bromine.

n(Br) = m(Br) ÷ M(Br).

n(Br) = 43.66 g ÷ 79.9 g/mol,

n(Br) = 0.55 mol; amoun of bromine.

From chemical formula (KBrOₓ), amount of potassium is equal to amount of bromine: n(Br) = n(K).

m(K) = 0.55 mol · 39.1 g/mol.

m(K) = 21.365 g; mass of potassium in the compound.

m(O) = 100 g - 21.365 g - 43.66 g.

m(O) =34.97 g; mass of oxygen.

n(O) = 34.97 g ÷ 16 g/mol.

n(O) = 2.185 mol.

n(K) : n(Br) : n(O) = 0.55 mol : 0.55 mol : 2.185 mol /÷ 0.55 mol.

n(K) : n(Br) : n(O) = 1 : 1 : 4.

You might be interested in
Which of the following is a correctly written chemical equation that demonstrates the conservation of mass?
wlad13 [49]

if I'm not mistaking it would be the second option

6 0
3 years ago
PLEASE ANSWER
vodka [1.7K]

Answer:

  • <u><em>B. Negative association</em></u>

<u><em></em></u>

Explanation:

<em>Negative association</em> is when the independent and dependent variables move in opposite directions: if the dependent variable increases, the independent variable decreases, and if the dependent variable decreases, the independent variable increases.

As you see in the diagram, as you move to the right on the horizontal axis, meaning that the independent variable is increasing, the points lie lower, meaning that the independent variable decreases.

Therefore, if you draw a line of best fit, it will have a negative slope. A negative slope indicates <em>negative association.</em>

The graph certainly shows association as there is a clear trend; else the points would be randomly dispersded.

7 0
3 years ago
On a mission to a newly discovered planet, an astronaut finds gallium abundances of 61.29 % for 69Ga and 39.71 % for 71Ga. What
snow_lady [41]
I believe it is 70.281amu
8 0
3 years ago
Is a particle with a positive charge.:)
tatyana61 [14]
Proton is the answer
8 0
3 years ago
Which of the following are compounds? (Select all that apply.)<br> CO2<br> Cl2<br> Ne<br> NaCl
beks73 [17]
CO2 and NaCl are both compounds
8 0
3 years ago
Other questions:
  • Which formula can be used to express the law of conservation of momentum, where p = momentum? pi = pf pi &gt; pf pi &lt; pf pi ≠
    10·2 answers
  • How do you tell if a reaction is endothermic or exothermic using only the written formula
    13·1 answer
  • A solution is prepared at 25 °C that is initially 0.23 M in propanoic acid, a weak acid with K, = 1.3 x 10^-5, and 0.42 M in sod
    6·1 answer
  • How many moles of fe2o3 will be produced from 18.0 g of fe assuming o2 is available in excess
    5·1 answer
  • What does the latent heat of fusion measure?
    8·1 answer
  • Which of the following is a way your body fights a bacterial infection? Fever Shivers Sweats Increased heart rate
    8·2 answers
  • 1.11 grams divided by 16.04 grams = how many moles?
    10·2 answers
  • which is a chemical change, water boiling, wood burning,glass breaking, ice melting, or molding iron ?
    5·2 answers
  • Which causes genetic variations and can result in different alleles?
    12·2 answers
  • your friend wants to fly a kite over the water on the beach. which time would you go time a time c or time f
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!