CHEMISTRY HIGH SCHOOL

Upon combustion, a 1.3109 g sample of a compound containing only carbon, hydrogen, and oxygen produces 3.2007 g $CO_(2)$ and 1.3102 g $H_(2)O$ . Find the empirical formula of the compound.The answer I got was $CH_(16)O$ , but I'm not sure if I did it right or not. Can someone confirm this for me?

Answers

Answer 1

Answer:

Answer:

The empirical formula of the compound is $C_4H_8O_1$

Explanation:

Moles of carbon dioxide = $(3.2007 g)/(44 g/mol)=0.07274 mol$

Moles of carbon in sample = $1* 0.07274 mol=0.07274 mol$

Moles of water = $(1.3101 g)/(18 g/mol)=0.07279 mol$

Moles of hydrogen in sample = $2* 0.07279 mol=0.14558 mol$

Mass of sample = Mass of carbon + Mass of hydrogen + Mass of oxygen

Mass of oxygen =

1.3109 g - (12 g/mol × 0.07274 mol) - (1 g/mol× 0.14558 mol)

Mass of oxygen = 0.29244 g

Moles of oxygen in sample = $(0.29244 g)/(16 g/mol)=0.01828 mol$

For empirical formula divide the moles of element which are is less amount with all the moles of every element.

Carbon = $(0.07274 mol)/(0.01828 mol)=3.9\approx 4$

Hydrogen = $(0.14558 mol)/(0.01828 mol)=7.9\approx 8$

oxygen= $(0.01828 mol)/(0.01828 mol)=1$

The empirical formula of the compound is $C_4H_8O_1$

Answer 2

Answer:

Answer:

The answer to your question is: C₃H₃O This is my answer.

Explanation:

Data

Sample = 1.3109 g

CxHyOz

CO₂ = 3.2007 g

H₂O = 1.3102 g

Empirical formula = ?

MW CO2 = 44 g

MW H2O = 18 g

For Carbon

44 g -------------------- 12 g

3.2007 g ------------ x

x = (3.2007 x 12) / 44

x = 0.8729 g of Carbon

12 g of C -------------- 1 mol

0.8729 g -------------- x

x = (0.8729 x 1) / 12

x = 0.0727 mol of Carbon

For Hydrogen

18 g ---------------------- 1 g

1.3102 g ------------------- x

x = (1.3102 x 1) / 18

x = 0.0727 g of Hydrogen

1 g ------------------------ 1 mol

0.0727g ---------------- x

x = (0.0727 x 1)/1

x = 0.0727 mol of Hydrogen

For oxygen

g of Oxygen = g of sample - g of Carbon - g of hydrogen

g of Oxygen = 1.3109 - 0.8709 - 0.0727

g of Oxygen = 0.3673

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

0.3673 g --------------------- x

x = (0.3673 x 1)/ 16

x = 0.0230 mol of Oxygen

Divide by the lowest number of moles

Carbon 0.0727 / 0.023 = 3.1 ≈ 3

Hydrogen 0.0727 / 0.023 = 3.1 ≈ 3

Oxygen 0.0230 / 0.023 = 1

C₃H₃O

Related Questions

A company is designing a new range of saucepans. The base of the saucepan should conduct heat well and evenly while the handle should be a good insulator. Which one of the following lists of substances would be the most appropriate for these tasks? Base Handle (a) aluminium aluminium (b) copper plastic (c) glass glass (d) plastic copper
Complete the following Empirical Formula & Molecular Formula problem:1.) A compound containing 63.15% C, 5.30% H, and 31.55% O. (Assume 100 g sample)
Help asapppshow work and help me plz for the other one just do 22,24,25 i will make you brainllest
Transferring or sharing electrons between atoms forms
7. Which of the following has to happen before the eardrum begins to vibrate with the same frequency as the source of the sound waves? A. Vibrations have to be transmitted to the fibers of the auditory nerve. B. Impulses have to be sent to the brain through the auditory nerve. C. The brain has to interpret the direction from which the sounds are being delivered. D. The outer ear has to collect the sound waves and lead them to the middle ear.

Greenhouse gases help regulate earths. A) oceans B) acid rain C) atmosphere D) temperature

Answers

greenhouse gases help regulate earth by D. temperature

Greenhouse gases help regulate earths D. Temperature.

Which of the following units is a derived unit?
Second
Meter
Density
Ampere

Answers

Answer : The correct option is, Density

Explanation :

S.I : It is known as the international System of Units. It is defined as a scientific method to express the magnitude of the several basics units.

There are seven basic units in the system from which the other units are derived.

The seven base unit are, meter for length, kilogram for mass, second for time, ampere for current, kelvin for temperature, mole for amount of substance and candela for intensity.

As per question, second, meter and ampere are the S.I units but the density is the derived unit.

Density : It is defined as the mass of a substance contained per unit volume.

The unit of mass is kilogram (kg) and the unit of volume is $m^3$ . So, the unit of density will be:

Formula used :

$Density=(Mass)/(Volume)=(kg)/(m^3)=kg/m^3$

The unit of density is, $kg/m^3$

Hence, the derived unit is density.

Density because you have to use volume and mass to get it. (Density=mass/volume)

What is the measurement from the line of origin to the crest? A. Trough
B. Amplitude
C. Crest
D. Wavelength

Answers

Im 90% sure its B amplitude

The basic points in Lewis and Langmuir theory of electrovalency

Answers

The correct answer for the question that is being presented above is this one: "Electrovalency is characterized with the transferring of one or more electrons from one atom to another together with the formation of ions and as well as the number of positive and negative charges.

The Lewis and Langmuir theory of electrovalency (and as well as Kossel's) is dealing with Ionic bonds.

Lewis: electron-pair sharing, octet rule, Lewis Symbols or StructureLangmuir: introduced term "covalent" bond, and popularized Lewis's ideas

The Lewis-Langmuir electron-pair or covalent bond is referred as the homopolar bond, where the complete transfer of electrons give rise to ionic, or electrovalent bond (1) through attraction of opposite charges.

According to Boyle's law, what would happen to the pressure of a gas if the temperature were tripled as the number of moles and the volume were held constant? A. The pressure would be one-third of its original value.
B. The pressure would be one-ninth of its original value.
C. The pressure would triple.
D. The pressure would remain the same.

Answers

According to Boyle's law, if the temperature were tripled as the number of moles and the volume were held constant, the pressure would triple (option C).

What is Boyle's law?

Boyle's law is the observation that the pressure of an ideal gas is inversely proportional to its volume at constant temperature.

However, when the temperature of a gas is increased, the pressure of the gas also increases provided the volume is constant.

According to this question, the temperature of a gas tripled as the number of moles and the volume were held constant.

Therefore, according to Boyle's law, if the temperature were tripled as the number of moles and the volume were held constant, the pressure would triple.

Learn more about Boyle's law at: brainly.com/question/1437490

#SPJ1

When K2SO4 is separated into its ions, how is it written?

Answers

Answer: $K^+$ and $SO_4^-^2$

Explanation: Potassium is a first group metal with one valence electron and so it has +1 charge. Sulfate ion is a polyatomic ion with -2 charge. The compound potassium sulfate has two potassium ions and one sulfate ion and the below equation shows how the ions are written when the compound is dissociated into its ions.

$K_2SO_4\rightarrow 2K^++SO_4^-^2$