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
snow_tiger [21]
2 years ago
9

A pure sample of a new chemical compound was analyzed and was found to have the following mass percentages: Al 31.5 %; O 56.1 %;

S 12.4 %.
Which of these could be the empirical formula of the compound?

Al5O28S7

Al3O9S

AlO2S2

Al4O14S7

AlO6S1.5
Chemistry
1 answer:
rjkz [21]2 years ago
4 0

Answer:

The answer to your question is empirical formula   Al₃O₉S

Explanation:

Data

Al = 31.5 %

O = 56.1 %

S = 12.4 %

Process

1.- Look for the atomic masses of the elements

Al = 27 g

O = 16

S = 32

2.- Represent the percentages as grams

Al = 31.5 g

O = 56.1 g

S = 12.4 g

3.- Convert these masses to moles

                               27 g of Al ----------------- 1 mol

                               31.5 g ----------------------  x

                                x = 1.17 moles

                               16 g of O ----------------  1 mol

                               56.1 g of O -------------  x

                                  x = 3.5 mol

                               32 g of S ---------------  1 mol

                               12.4 g of S -------------   x

                                x = 0.39 moles

4.- Divide by the lowest number of moles

Al =   1.17 / 0.39  = 3

O =    3.5 / 0.39 = 8.9 ≈ 9

S  =   0.39 / 0.39 = 1

5.- Write the empirical equation

                                Al₃O₉S

You might be interested in
WHY is there a difference between how an electrolytes and non electrolytes affect collegiative properties?
natulia [17]
 <span>Colligative properties are dependent upon the number of molecules or ions present in solution. Therefore, 1 mole of Na2SO4 will produce 3 moles of ions and so it will have 3 times as much of an effect as 1 mole of sugar, which is not an electrolyte and can't dissociate to an appreciable extent.</span>
4 0
2 years ago
How does active transport differ from passive transport
pickupchik [31]
Active is more active which means it's in person
5 0
3 years ago
Read 2 more answers
How does increasing the temperature affect a reaction?
Luden [163]

Answer:A. An increase in temperature increases the reaction rate.

Explanation:because of the disproportionately large increase in the number of high energy collisions. It is only these collisions (possessing at least the activation energy for the reaction) which result in a reaction.

4 0
3 years ago
A physical property of a solid used to describe its surface
pantera1 [17]
The surface would be flat
5 0
3 years ago
Read 2 more answers
Which of the following has the greatest mass?
Annette [7]

Answer:

I guess one mole. of mercury

Explanation:

because mercury is denser

8 0
2 years ago
Other questions:
  • THIS IS URGENT
    9·2 answers
  • Which type of orbitals overlap to form the sigma bond between C and N in H−C≡N:? Which type of orbitals overlap to form the sigm
    9·1 answer
  • What happens to the molecules of water as it freezes?
    11·1 answer
  • Nickel has 28 protons if it has 31 neutrons, what is it’s atomic mass?
    7·1 answer
  • What is the electron configuration of an electrically neutral atom of magnesium?
    12·1 answer
  • Which of the following statements is true?
    13·2 answers
  • The pressure exerted by a gas container depends on
    13·1 answer
  • In the oxidation of ethane: 2 C2H6 + 7 02 → 4 CO2 + 6 H2O how many
    15·1 answer
  • What document, signed by the district attorney, authorizes the search of a building for the purpose of collecting evidence at a
    5·2 answers
  • Explain Rutherford’s gold foil experiment. What particle did he discover?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!