what is the empirical formula of A compound is found to contain 39.12 % carbon, 8.772 % hydrogen, and 52.11 % oxygen by mass.

Answers

Answer 1

Answer:

C₃H₈O₃

Explanation:

Let's assume we have 100 g of said compound. Then we would have:

39.12 g of C8.772 g of H52.11 g of O

Now we convert those masses into moles, using their respective atomic weights:

C ⇒ 39.12 g ÷ 12 g/mol = 3.26 mol CH ⇒ 8.722 g ÷ 1 g/mol = 8.722 mol HO ⇒ 52.11 g ÷ 16 g/mol = 3.26 mol O

Then we divide those moles by the smallest number among them:

C ⇒ 3.26 mol C / 3.26 = 1H ⇒ 8.722 mol H / 3.26 = 2.68O ⇒ 3.26 mol O / 3.26 = 1

Finally we multiply those numbers by 3, so as to convert the 2.68 of H into an integer:

C ⇒ 1 * 3 = 3H ⇒ 2.68 * 3 = 8O ⇒ 1 * 3 = 3

Thus the empirical formula is C₃H₈O₃


Related Questions

Hydrogen bromide is a chemical compound. It’s formed from atoms of hydrogen and bromide, two

A
electrons.

B
elements.

C
neutrons.

D
nuclei.

Answers

Answer: The correct option is B. elements.

Explanation:

A chemical compound is defined as the specie which is formed by the combination of two or more elements. For example: Water, carbon dioxide, etc..

Elements is defined as the chemical specie which consists of only one type of atom. For example: Hydrogen, Oxygen, etc..

Now, when hydrogen element and bromine element combines, it leads to the formation of a heteronuclear chemical compound known as hydrogen bromide having chemical formula HBr.

Hence, the correct option is B. elements.

Hydrogen and bromine are two elements that form hydrogen bromide (HBr).

COMPOUND:

A compound is a chemical substance made up of chemical combination of two or more elements.

According to this question, Hydrogen bromide is a chemical compound formed from atoms of hydrogen (H) and bromine (Br).

These two atoms that make up hydrogen bromide are that of elements. Therefore, it can be said that hydrogen and bromine are two elements that form hydrogen bromide (HBr).

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what happen when we put a waterproof paper in hot water and what happens in cold water?

Answers

Answer:

When you heat up water, the water molecules start moving around faster and faster. ... So hot water is less dense than cold water. When you put the two together with the hot water on the bottom, the hot water rises to the top, mixing with the cold water along the way and creating purple water.

Explanation:

have a great day :)

maintaining an internal body temperature is one of the key components to maintaining homeostasis

Answers

Answer:

maintaining an internal body temperature is one of the key components to maintaining homeostasis

It's true since homeostasis is the regulation of body temperature

this would have to be true, homeostasis is the regulation of all bodily functions

Consider the reaction of solid aluminum iodide and potassium metal to form solid potassium iodide and aluminum metal.The balanced chemical equation is AlI₃(s) + 3 K(s) → 3 KI(s) + Al(s).Given the reaction has a percent yield of 67.8%, what is the mass in grams of aluminum iodide that would be required to yield an actual amount of 30.25 grams of aluminum?

Answers

Answer:

674.26 g of AlI₃

Explanation:

We'll begin by calculating the theoretical yield of aluminum (Al). This can be obtained as follow:

Percentage yield of Al = 67.8%

Actual yield of Al = 30.25 g

Theoretical yield of Al =?

Percentage yield = Actual yield /Theoretical yield × 100/

67.8% = 30.25 / Theoretical yield

67.8 / 100 = 30.25 / Theoretical yield

0.678 = 30.25 / Theoretical yield

Cross multiply

0.678 × Theoretical yield = 30.25

Divide both side by 0.678

Theoretical yield = 30.25 / 0.678

Theoretical yield of Al = 44.62 g

Next, we shall determine the mass of AlI₃ that reacted and the mass of Al produced from the balanced equation. This can be obtained as follow:

AlI₃(s) + 3K(s) → 3KI(s) + Al(s)

Molar mass of AlI₃ = 27 + (3×127)

= 27 + 381 = 408 g/mol

Mass of AlI₃ from the balanced equation = 1 × 408 = 408 g

Molar mass of Al = 27 g/mol

Mass of Al from the balanced equation = 1 × 27 = 27 g

Summary:

From the balanced equation above,

408 g of AlI₃ reacted to produce 27 g of Al.

Finally, we shall determine the mass of

AlI₃ required to produce 44.62 g of Al. This can be obtained as follow:

From the balanced equation above,

408 g of AlI₃ reacted to produce 27 g of Al.

Therefore, Xg of AlI₃ will react to produce 44.62 g of Al i.e

Xg of AlI₃ = (408 × 44.62)/27

Xg of AlI₃ = 674.26 g

Thus, 674.26 g of AlI₃ is needed for the reaction.

What is the correct formula to determine density?

Answers

D=M/V I hope this helps

Answer:

density =mass/volume

Explanation:

p=m/v

p means raw

m means mass

v means volume.

Which of the following atoms has the greatest tendency to attract electrons?
A. Sodium
B. Magnesium
C. Boron
D. Sulfur

Answers

Answer: b!

Explanation:

A look at it as a soda and it’s bout to explode

What is the systematic name of the following compound?
Li2S

Answers

Answer:

the systematic name is called Lithium sulfide.

An inorganic substance composed of the elements lithium (Li) and sulfur (S) is known as lithium sulfide [tex](Li_2S)[/tex].

It is a substance that solidifies in the shape of a crystal. Lithium ions in lithium sulfide have a positive charge, while sulfide ions have a negative charge. The chemical lithium sulfide is important in many industries. It is often employed in the synthesis of various lithium compounds, the manufacture of lithium batteries, and the manufacture of ceramics. Due to their high energy density, lithium batteries are often employed in portable electronics and electric vehicles.

Lithium sulfide is an ionic compound that has a high melting point in terms of physical characteristics. Although it is insoluble in water, many organic solvents can help dissolve it.

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10 points!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

B

Explanation:

i think the filtering would make it possible to separate the liquids....

Answer:

My friend is guessing so she says it's letter C

Explanation:

Sorry if she is wrong.

Solid mercury (II) oxide produces liquid mercury and oxygen gas

Answers

Mercury(II) oxide, a red solid, decomposes when heated to produce mercury and oxygen gas. Mercury(II) oxide is a red solid. When it is heated, it decomposes into mercury metal and oxygen gas. A reaction is also considered to be a decomposition reaction even when one or more of the products are still compounds.

What does a sound wave’s frequency tell you? HELP IF YOU WANT BRAINLEIST AND TO HAVE YOUR COMMENT LIKED!!


A. the loudness or softness of the sound from an object

B. the type of medium in which the sound is traveling

C. the number of vibrations per second an object is making

D. the amplitude of the sound wave

Answers

Answer:

I am pretty sure it is C.

Explanation:

Because the wave frequency's tell us the number of waves there are on that diagram.

Answer:

C. the number of vibrations per second an object is making

Explanation:

Hope this helps. Sorry if it doesn't. T^T

magnesium nitrate is a strong electrolyte. Write the transformation that occurs when solid magnesium nitrate

Answers

The question is incomplete, the complete question is;

The compound magnesium nitrate is a strong electrolyte. Write the reaction when magnesium nitrate is put into water:

Answer:

Mg(NO3)2(s)--------->Mg^2+(aq) + 2NO3^-(aq)

Explanation:

When we say that a compound is a strong electrolyte, we mean that that the compound dissociates completely in solution to form its ions.

This means that all strong electrolytes attain 100% dissociation of the solid in water according to its stoichiometric equation.

For magnesium nitrate, the reaction equation is;

Mg(NO3)2(s)--------->Mg^2+(aq) + 2NO3^-(aq)

Which element has the greatest average atomic mass?

Answers

Answer:

Tellurium

Explanation:

Edg 2021

Which of the following describes light? (SELECT ALL THAT APPLY.)
A. Light passes through all objects.
B. Light is reflected off the surface of mirrors.
C. Light travels in a straight line.
D. Light waves behave in predictable ways.

Answers

Answer:

The light reflects twice before it finally exits the system. Draw a normal at the point of incidence to the first mirror; measure the angle of incidence (45 degrees); then draw a reflected ray at 45 degrees from the normal. Repeat the process for the second mirror.

Explanation:

Hope that helps!

(1) Phosphorus silicon is a semi-conductor

Answers

When Silicone is altered with Phosphorus, 4 of its electrons form covalent bonding and the 5th electron becomes delocalized and thus it increases electrical conduction

Answer:

blue blah blue blah

Explanation:

What do you notice about the movement of the molecules of the two samples?

Answers

Explanation:

For sample A, I put the temperature to 93.2 C and sample B to 6.8 C. Once I dragged them together, I noticed that the numbers were going down the second I put them together! Sample A was getting colder and Sample B was getting warmer. As I let both the samples do their thing, I realized they weren't changing temperatures anymore. Both samples stopped at 50.0 C and have never changed temperatures since then.

Which two structures are connected by the ear bones?


eardrum and stirrup

stirrup and auditory nerve

auditory nerve and cochlea

cochlea and eardrum

Answers

Answer:

I THINK it is A

Explanation:

Answer: it is the eardrum caus ei used it on my test and as well got it right

Explanation: because it just is

[tex]hut7utpojghuire\\kjionbenhrmhbnhknokgn\\bihkjihjgnhrk\\\\gnthnrt\\hgnth\\\alpha thtrnhjn4t also this is for fun to me[/tex]

PLEASE HELP I WILL GIVE YOU BRAINLIEST
(the linked photo)!!! thank you

Answers

Answer:

1. nitrous oxide

2. copper sulfide

3. cl2o7

4. MgBr2

Explanation:

hope it helps

mgbr2 cl207 im not sure on the first stuff hopefully this helps

Is this structure named correctly???
Pls answer me fast guys!!


Answers

Answer:

No; According to the IUPAC , it should be

3-bromopentan-2-ol

why is the difference between the result for an ideal gas and that calculated using the van der waals equation greater when the gas is confined to 5.00 L compared to 22.4 L

Answers

The question is incomplete, the complete question is;

In Sample Exercise 10.16, we found that one mole of Cl2 confined to 22.41 L at 0 °C deviated slightly from ideal behavior. Calculate the pressure exerted by 1.00 mol Cl2 confined to a smaller volume, 5.00 L, at 25 °C. (a) First use the ideal-gas equation and (b) then use the van der Waals equation for your calculation. (Values for the van der Waals constants are given in Table 10.3.) (c) Why is the difference between the result for an ideal gas and that calculated using the van der Waals equation greater when the gas is confined to 5.00 L compared to 22.4 L?

Answer:

See explanation

Explanation:

Since we have

For 5.00 L using Ideal gas law;

PV= nRT

P = nRT/V

P = 1 * 0.082 * 298 K/5.00

P= 4.887 atm

Using Van der walls equation;

[P + an^2/v^2] *  [V - nb] = nRT

P = (nRT/ [V - nb]) - (an^2/v^2)

P= 1 * 0.082 * 298/5 - (1 * 0.0562) - (6.49(1^2)/5^2)

P = (24.436/4.9438) - 0.2596

P= 4.683 atm

For 22.4 L

P = nRT/V

P = 1 * 0.082 * 298 K/22.4

P= 1.0909 atm

Using Van der Walls equation;

[P + an^2/v^2] *  [V - nb] = nRT

P = (nRT/ [V - nb]) - (an^2/v^2)

P= 1 * 0.082 * 298/22.4 - (1 * 0.0562) - (6.49(1^2)/22.4^2)

P= (24.436/ 22.3438) - 0.0129

P= 1.081 atm

According to Boyle's law, pressure is inversely proportional to volume. Increase in volume leads to decrease in pressure. Therefore the pressure calculated both by the ideal gas equation and Van der Waals equation at 5.00 L is greater than that calculated using both methods at 22.4 L

Please help I’ll make brainlist

Answers

Explanation:

c realsed from the galaxie

Answer:

C

Explanation:

A P E X

Kichi made a table to identify where she might find acids and bases in her house based on their common uses. Substance ammonium hydroxide sulfuric acid citric acid potassium hydroxide Location cleaning cabinet cosmetics bag refrigerator flashlight What error did Kichi make?
Ammonium hydroxide would be found in the pantry because it is found in vinegar.

Sulfuric acid would be found in the garage because it is used in car batteries,

Citric acid would be found in the garage because it is used to clean rust from metal.
Potassium hydroxide would be found in the kitchen cabinet because it is used in oven cleaner.​

Answers

Answer:

Kichi made the an error in the 2nd row which is Sulfuric acid.

Sulfuric acid would be found in the garage because it is used in car batteries

Explanation:

Ammonium hydroxide (NH4OH) is used in household cleaners.

Sulfuric acid (H2SO4) is used in industrial chemicals and car batteries.

Citric acid (H3C6H5O7) is in lemons, limes, and oranges.

Potassium hydroxide is used in batteries.

Kichi made a mistake while locating sulfuric acid which is an acid and is used car batteries ,hence it should be found in garage rather than in cosmetics bag.

What is an acid?

Acids are defined as substances which on dissociation yield H+ ions , and these substances are sour in taste. Compounds HCl, H₂SO₄ and HNO₃ are acids as they yield H+ ions on dissociation.

According to the number of H+ ions which are generated on dissociation acids are classified as mono-protic , di-protic ,tri-protic and polyprotic  acids  depending on the number of protons which are liberated on dissociation.

Acids are widely used in industries  for  production of fertilizers, detergents  batteries and dyes.They are used in chemical industries for production of chemical compounds like salts which are produced by neutralization reactions.

Learn more about acids,here:

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Use the following reaction:

6 NaCl + Ba3(PO4)2 → 2 Na3PO4 + 3 BaCl2

How much barium chloride is produced (in g) when 1500 g of sodium chloride react with excess barium phosphate?

Round your answer to a whole number, do not write the units.

Answers

Mass of Barium chloride produced : 2666.56 g

Further explanation

Given

Reaction

6 NaCl + Ba3(PO4)2 → 2 Na3PO4 + 3 BaCl2

1500 g of sodium chloride

Required

Barium chloride produced

Solution

mol NaCl (MW= 58.5 g/mol) :

mol = mass : MW

mol = 1500 g : 58.5 g/mol

mol = 25.64

mol Barium chloride-BaCl2 based on mol NaCl(as a limiting reactant)

From the equation, mol ratio NaCl : BaCl2 = 6 : 3, so mol BaCl2 :

[tex]\tt \dfrac{3}{6}\times 25.64=12.82[/tex]

mass BaCl2(MW=208 g/mol) :

mass = mol x MW

mass = 12.82 x 208

mass = 2666.56 g

what is bohr's model?​

Answers

Answer:

In atomic physics, the Bohr model or Rutherford–Bohr model, presented by Niels Bohr and Ernest Rutherford in 1913, is a system consisting of a small, dense nucleus surrounded by orbiting electrons—similar to the structure of the Solar System, but with attraction provided by electrostatic forces in place of gravity.

Answer:

BOHR'S MODEL OF ATOM :

In order to overcome the objections raised against Rutherford's model of the atom, Neils Bohr put forward the following postulates about the model of an atom:

(i) Only certain special orbits known as discrete orbits of electrons, are allowed inside the atom.(ii) While revolving in discrete orbits the electrons do not radiate energy.

These orbits or shells are called energy levels. Energy levels in an atom are shown in Fig.

There orbis for shells are represented by the letters K,L,M,N... or the number n = 1,2,3,4...

ABOUT BOHR :

Neils Bohr (1885-1962) was born in Copenhagen on 7 October 1885. He was appointed professor of physics at Copenhagen University in 1916. He got the Nobel prize for his work on the structure of atom in 1922. Among Professor Bohr's numerous writings. three appearing

s books are:

(i) The Theory of Spectra and AtomicConstitution. (ii) Atomic Theory and.(iii) The Description of Nature————————————————

What are the horizontal rows called on the Periodic Table?
O group
period
family

Answers

Answer:

Periods :)

HOPE IT HELPS YOU

MARK ME SS BRAINIEST

YOU CSN THANK ME IN THE COMMENT

Will the composition of water molecules vary depending on their source?

Answers

Answer:

It does not matter where the sample of water came from or how it was prepared. Its composition, like that of every other compound, is fixed.

Atoms are stationary and don't move when in solid form.

False

True

Answers

Answer:

True? The don't stay exactly still i dont think, but i'd say true.

Explanation:

Answer:

TRUE

Explanation:

In a solid, atoms are packed tightly together and move very slowly. In fact, they do not flow at all: they simply vibrate back and forth.

Key words vibrate, not movement.

Correct me if I'm wrong of course

Equilibrium occurs in what type of reactions?
A. Catalytic
B. Irreversible
C. Reversible
D. Combustion

Answers

Answer:

B. Irreversible

Explanation:

Answer: C  Reversible

Explanation:

Founder's Education Quiz

The successive ionization energies for a given element are listed. How many valence electrons does it have?

Answers

Answer:

3 valence electrons

Explanation:

Let us first find the amount increased for everything.

From 1st to 2nd,  1048 - 620 = 428

428 increased from 1st to 2nd.

From 2nd to 3d, 2144 - 1048 = 1096

1096 increased from 2nd to 3rd.

From 3rd to 4th, 8724 - 2144 = 6580

6580 increased from 3rd to 4th.

From 4th  to 5th, 10141 - 8724 = 1417

From 3rd to 4th,  it increased the most. Therefore, we assume that those are the beginning core electrons and not valence electrons. Also, starting from 3rd, they are all core electrons.

For the 1st and 2nd,  we can assume they are valence electrons because the kJ/mol didn't increase that much.

Since the core electrons started from the 3rd, we most likely have 3 valence electrons.

So the final answer is 3.

Hope it helped!

what is the mass of 8.07 x 10^24 molecules of 02?

Answers

Answer:Avogadro's number 6.02 x 10^23 of O2 molecules has a mass of 32 gm (atomic weight of O = 16 gm, 2 x 16 = 32).

Explanation:pls brainless

How many grams of H2O are in 34.53 moles of H2O??​

Answers

Answer:

m=621.54g

Explanation:

number of moles= mass of H2O/molar mass of H2O

n=m/mm

make mass the subject of the formula

m=n*mm

find molar mass of water

H2O=1(16)+2(1)

mm= 18.0g/mol. n=34.53mol

hence, m=34.53mol*18.0g/mol

m=621.54g

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