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
Liula [17]
3 years ago
5

A compound contains 38.7% K, 13.9% N, and 47.4% O by mass. What is the empirical formula of the compound?

Chemistry
1 answer:
inysia [295]3 years ago
8 0
K ---> 38.7 g / 39.1 g/mol = 0.99
N ---> 13.9 g / 14.0 g/mol = 0.99
O ---> 47.4 g / 16.0 g/mol = 2.96

Divide by smallest:

K ---> 0.99 / 0.99 = 1
N ---> 0.99 / 0.99 = 1
O ---> 2.96 / 0.99 = 3

KNO3
You might be interested in
Aspirin is one of the Aesthetic Values of biodiversity<br><br> true<br> false
Trava [24]

Answer:

true

Explanation:

6 0
2 years ago
Genetic engineers must modify eukaryotic genes so that they can be expressed in bacterial host cells. The DNA from a eukaryotic
denpristay [2]

Answer:

Bacterial genes contain no introns, so the cells, which lack splicing machinery, cannot express eukaryotic genes containing introns and exons. Mature eukaryotic mRNA, which has already been spliced, contains only exons, which, after they have been converted back to DNA, can be transcribed and translated by the bacteria.

Explanation:

7 0
3 years ago
The Kelvin temperature required for 0.0470 mol of helium gas to fill a balloon to 1.20 L under 0.878 atm is
4vir4ik [10]
From the ideal gas law, PV = nRT, we can rearrange the equation to solve for T given the other parameters.

T = PV/nR

where P = 0.878 atm, V = 1.20 L, n = 0.0470 moles, and R = 0.082057 L•atm/mol•K. Plugging in our values, we obtain the temperature in Kelvin:

T = (0.878 atm)(1.20 L)/(0.0470 mol)(0.082057 L•atm/mol•K)
T = 273 K

So, the second answer choice would be correct.
7 0
3 years ago
The liquids hexane and water are placed in a test tube. The test tube is stoppered, shaken, and placed in a test tube rack. The
Diano4ka-milaya [45]

The liquids hexane and water are placed in a test tube. The test tube is stoppered, shaken, and placed in a test tube rack. The liquids separate into two distinct layers because hexane and water have different molecular polarities. The answer is number 2.

5 0
2 years ago
Read 2 more answers
An astronomer studying planets outside our solar system has analyzed the atmospheres of four planets. Which of these planets’ at
Nata [24]

Answer: Planet A: 76% Nitrogen, 23% Oxygen, 1% Other

Explanation: Hope this helps!

3 0
2 years ago
Other questions:
  • Part a ammonia can be produced via the chemical reaction n2(g)+3h2(g)⇌2nh3(g) during the production process, the production engi
    10·1 answer
  • How many protons neutrons and electrons does zinc 66 have?
    13·1 answer
  • HELP ME PLEASE. Which of the following statements is true for electrolysis? New atoms are created by destroying old atoms. A com
    6·1 answer
  • For which of the following is heat energy released?
    10·2 answers
  • An unknown substance was put in a container. The substance filled up the container from the bottom up, taking half of the space
    7·1 answer
  • When nitrogen, oxygen, fluorine, sodium, magnesium and aluminum ionize, they all will have:
    14·1 answer
  • Which of the following reactions below could be properly categorized as a synthesis reaction?
    11·1 answer
  • Elements that become cations during bonding become smaller as a result.
    12·1 answer
  • Describe the three possible decisions you can receive from an
    8·1 answer
  • The mass of an object is measured in _____.
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!