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
Verdich [7]
3 years ago
9

What is the empirical formula for a compound if a sample contains 3.72 g of P and 21.28 g of Cl

Chemistry
1 answer:
fenix001 [56]3 years ago
6 0
M(P)=3.72 g
M(P)=31 g/mol

m(Cl)=21.28 g
M(Cl)=35.5 g/mol

n(P)=m(P)/M(P)
n(P)=3.72/31=0.12 mol

n(Cl)=m(Cl)/M(Cl)
n(Cl)=21.28/35.5=0.60 mol

P : Cl = 0.12 : 0.60 = 1 : 5

PCl₅ - is the empirical formula
You might be interested in
A scientist, Dr. Sigma, states that a chemical taken internally once a day will prevent the common cold. However, no other scien
pshichka [43]

Answer:

not valid

Explanation:

Expert judgment is a useful validation method to verify the reliability of an investigation that is defined as “an informed opinion of people with experience in the subject, who are recognized by others as qualified experts in it, and who can give information, evidence, judgments and assessments ”

After submitting an instrument for comparison to the consultation and expert opinion, it must meet two quality criteria: validity and reliability. The validity of content is often established based on two situations, one that concerns the design of a test and the other, the validation of an instrument subject to translation and standardization procedures to adapt it to different cultural meanings. It is here that the task of the expert becomes a fundamental task to eliminate irrelevant aspects, incorporate those that are essential and / or modify those that require it.

5 0
3 years ago
Write the balance chemical equation for propane.
Mars2501 [29]
It would be 3C + 4H2 -> C3H8
3 0
3 years ago
Where was cell theory discovered ?
SVEN [57.7K]
Cell theory was discovered from the scientist
8 0
3 years ago
A line has a slope of 5 and a y-intercept of -2.
KiRa [710]

Answer:

+T919919 mean the x- intercept of the line

4 0
3 years ago
An energy profile for the reaction A⇌B (left), and the change in concentration of B as a function of time (right), with and with
RoseWind [281]

Answer:

<em>What quantity dictates the speed of a reaction?</em> The activation energy

Explanation:

According to the collision theory, when molecules collide, they must overcome an energy barrier for the reaction to take place. This energy, known as activation energy, is represented by the difference in energy between the initial state and the transition state. The higher the activation energy, the slower the reaction. That's why catalysts reduce the activation energy to accelerate the reaction.

3 0
3 years ago
Other questions:
  • A celestial body is any natural (i.
    6·2 answers
  • Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid, HCl(aq) , as described b
    5·1 answer
  • What is density? what does it tell you about substance?
    10·1 answer
  • True or false: seafloor spreading takes place along a mid ocean ride
    9·1 answer
  • Chemistry!! Please help asap!! Will mark brainiliest!!
    11·1 answer
  • Which state of matter expands when heated and is easy to compress?
    15·1 answer
  • Acetone, a common solvent, has density 0.79g/cm3 at 20 degrees celcius. What is the volume of 85.1g of acetone at 20 degrees cel
    8·2 answers
  • ILL GIVE BRAINLIST Mrs. Kucalaba downloaded some science music from the Internet onto her iPhone. She listened to the science mu
    6·1 answer
  • HELP ASAP!!! Which two energy transformations are shown in the photo? A. Chemical energy → electromagnetic energy B. Chemical en
    8·2 answers
  • What is the percentage by volume of 30.0 mL ethanol (C2H6O) dissolved in 150.0 mL water (H2O)?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!