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
faltersainse [42]
3 years ago
10

What is the empirical formula for a compound that is 29.44\% calcium, 23.55% sulfur, and 47.01% oxygen? This compound is a commo

n ingredient in plaster
Chemistry
1 answer:
PSYCHO15rus [73]3 years ago
3 0

Answer:

Empirical formula is CaSO₄.

Explanation:

Given data:

Percentage of calcium =29.44%

Percentage of sulfur = 23.55%

Percentage of oxygen = 47.01%

Empirical formula = ?

Solution:

Number of gram atoms of Ca = 29.44 / 40 = 0.74

Number of gram atoms of S = 23.55 / 32 = 0.74

Number of gram atoms of O = 47.01 / 16 = 3

Atomic ratio:

            Ca                      :        S                :         O

           0.74/0.74           :     0.74/0.74      :       3/0.74

               1                     :          1              :          4

Ca : S : O = 1 : 1 : 4

Empirical formula is CaSO₄.

You might be interested in
One atomic model describes electrons moving in clouds around the nucleus.
bixtya [17]

Answer: D.  It is the currently accepted atomic model.

Explanation:

It is the mordern atomic model, also known as the Electron Cloud Model. Indicating that the nucleus of an atom is surrounded by a cloud of electrons.

8 0
2 years ago
True or false?
Virty [35]
The answer would be true
3 0
3 years ago
________ exercise strengthens skeletal muscle, and ________ exercise strengthens skeletal and cardiac muscle.
valentinak56 [21]

Answer:

<h3>... :-!...................nose...........</h3>
6 0
2 years ago
If 125.0g of nitrogen is reacted with 125.0g of hydrogen, what is the theoretical yield of the reaction? What is the excess reac
MakcuM [25]

Answer:

Hydrogen is the excess reactant

Nitrogen is the limiting reactant

151.6g is theoretical yield

Explanation:

The reaction of N₂ with H₂ to produce NH₃ is:

N₂ + 3H₂ → 2NH₃

To find theoretical yield we need to determine limiting reactant with the moles of each gas as follows:

Nitrogen -Molar mass: 28g/mol-

125.0g * (1mol / 28g) = 4.46 moles

Hydrogen -Molar mass: 2g/mol-

125.0g * (1mol / 2g) = 62.5 moles of hydrogen

For a complete reaction of 4.46 moles of N2 there are needed:

4.46 moles N2 * (3moles H2 / 1mol N2) = 13.38 moles of hydrogen

As there are 62.5 moles of hydrogen:

<h3>Hydrogen is the excess reactant</h3><h3>Nitrogen is the limiting reactant</h3><h3 />

With nitrogen, the limiting reactant, we determine theoretical moles (Assuming 100% of the reaction occurs) and theoretical yield (In mass):

4.46 moles N2 * (2moles NH3 / 1mol N2) = 8.92 moles of ammonia

As molar mass of ammonia is 17g/mol:

8.92 moles of ammonia * (17g/mol) =

<h3>151.6g is theoretical yield</h3>

5 0
3 years ago
Which set of numbers gives the correct possible values of I for n = 22
Alexandra [31]

Answer:

Hello friends

Explanation:

<h3>For a given principal quantum number for or n, the corresponding angular quantum number or is equivalent to a range between 0 and( n-1)</h3>

<h3>This means that the angular quantum number for a principal quantum number of 2 is equivalent to.</h3>

<h3>1 = 0 - > (n - 1) = 0 - > (2 - 1) = 0 - > 1</h3>

<h3>Hope it's helpfully. </h3>
4 0
2 years ago
Other questions:
  • Name the element that has atom with 4 proton in the nucleus
    12·2 answers
  • Why is carbon dioxide a pure substance and not a mixture?
    8·1 answer
  • Dispersion forces are strong compared to the other forces. Therefore, molecules held together by dispersion forces break apart l
    13·1 answer
  • A) Why is mole called fundamental<br>un<br>b) State the law of moment.​
    12·1 answer
  • the reaction below shows a system in equilibrium how would an increase in the concentration of chemicals affect this reaction?
    9·1 answer
  • Which of the following feedbacks can be either positive or negative?
    12·1 answer
  • If an object reflects green and absorbs all other colors, it will appear _____?
    7·1 answer
  • What is the maximum kinetic energy of an emitted electron if the incident light has a wave length of 217 nm. For Silver.
    9·1 answer
  • In a compound, chemical energy is _______________ when bonds break.
    9·1 answer
  • The thermometer in the
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!