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
kaheart [24]
2 years ago
15

Determine the empirical formula of a compound that was found to contain 6.412 g potassium, 2.292 g n, and 7.871 g o.

Chemistry
1 answer:
Jet001 [13]2 years ago
5 0

Answer: KNO3

Explanation: Hello! the answer to your question is KNO3

We get this by dividing each by their molar mass

Potassium: 6.412/39.10 = 0.1639

Nitrogen: 2.292/14.01 =0.1635

Oxygen: 7.871/16.00 = 0.4919

We then pick the smallest of these results, this would be Nitrogen and divide everything with this answer, 0.1635

     

Potassium:  = 0.1639/0.1635 = 1.002, about 1

Nitrogen:  0.1635=0.1635, 1

Oxygen:  = 0.4919, 3.008, about 3

Now that we have the number of moles, we put it together, making KNO3

You might be interested in
A scientist would most likely need to update her model when it
Marizza181 [45]
A scientist would most likely need to update her model when it no longer supports the latest results.
5 0
3 years ago
Read 2 more answers
Consider a galvanic cell consisting of the following two redox couplesAlB+ 3e Al , Mga + 2e Mg, (ag. E® = 1.676 V ) E° = 2.356 V
malfutka [58]

Answer:

0.68 V

Explanation:

For anode;

3Mg(s) ---->3Mg^2+(aq) + 6e

For cathode;

2Al^3+(aq) + 6e -----> 2Al(s)

Overall balanced reaction equation;

3Mg(s) + 2Al^3+(aq) ----> 3Mg^2+(aq) + 2Al(s)

Since

E°anode = -2.356 V

E°cathode = -1.676 V

E°cell=-1.676 -(-2.356)

E°cell= 0.68 V

4 0
3 years ago
Why does electronegativity increase as you move across the periodic table
Scrat [10]

Answer:

moving across te periodic table electronegativity increases.

Explanation:

as we move across a period the effective nuclear charge increases as the number of protons in nucleus increases. due to increase in effective nuclear charge electronegativity increases

5 0
3 years ago
7. Calculate the net charge of the following atoms.
loris [4]

Answer:

any atom that contains six protons is the element carbon and has the atomic number 6, regardless of how many neutrons or electrons it may have.

Explanation:

6 0
3 years ago
Read 2 more answers
Calculate the molality of an ethylene glycol (C2H6O2) soltuion, that has a molarity of 2.07 M. The density of the solution is 1.
vlada-n [284]

Answer:

2.03

Explanation:

Let's <u>assume we have 1 L of the solution</u>:

  • There would be 2.07 ethylene glycol moles.
  • The solution would weigh (1000 mL * 1.02 g/mL) = 1020 g.

With that information we can <u>calculate the molality</u>:

  • molality = moles of solute / kg of solvent
  • molality = 2.07 moles / (1020 ÷ 1000) = 2.03 m

Keep in mind that this is only an estimate, as we used the kg of the solution and not of the solvent.

3 0
2 years ago
Other questions:
  • Silicon has three naturally occurring isotopes. Silicon-28 has a mass of 27.98 and a relative abundance of 92.23%. Silicon-29 ha
    7·2 answers
  • If you were asked to describe metals and magnetism you could say. A. non–paired electrons spin in opposite directions in all met
    7·2 answers
  • If you were running an experiment to determine the temperature at which
    6·1 answer
  • Meteors look like they have tails. Are they the same as comet tails?
    8·1 answer
  • Look at the chemical equation shown below. A, B, X, and Y represent different elements or polyatomic ions.
    13·1 answer
  • What type of wave is created by solar energy?
    12·1 answer
  • What is the molarity of 2.34 mil of calcium in 1860 mL of solution?
    7·2 answers
  • Jack was playing with a toy car and a track that records velocity over time using sensors and it generated the graph below:
    14·1 answer
  • What is one disadvantage of a unicellular organisms?
    6·1 answer
  • C6H12 + 9 O2 –&gt; 6 CO2 + 6 H2O
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!