5 ×10^-10 equilibrium constants indicates the reaction that gives the greatest amount of reactant.
At equilibrium, the forward and reverse reaction rates are equal, resulting in constant concentrations for all of the chemicals. Given that, it seems sense that the ratio of concentration for any given reaction at equilibrium will always keep a constant value.
The ratio of the mathematical product of a reaction's products to that of the concentrations of its reactants is known as the equilibrium constant (Keq). The balanced chemical equation raises each concentration to the power of its corresponding coefficient. K=1 when equilibrium attains. It has no units.
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to determine the concentration (c) of a substance, the absorbance (A) range that produces the
maximum precision lies between 0.20 and 0.80. Suppose the molar absorptivity coefficient (E)
of a substance was found to be 7769 M cm. Using a cuvette with a 1 cm path length (!), what
range of concentrations will produce an absorbance between 0.20 and 0.80?
The range of concentrations that will produce an absorbance between 0.20 and 0.80 is 0.00258 - 0.01032 M.
What is concentration?
Longer attention spans, better mental and emotional control, and the ability to concentrate on one thing at a time are all signs of concentration. Concentration is "the capacity to focus all of your effort and attention with one thing, without thinking about other things." The Macmillan Dictionary defines concentration as "the process of giving your full attention to something." When concentrating, the mind is single-mindedly focused on the thing that is being concentrated on. This particular thought becomes the focus of all mental energy. It takes training to hone the skill of mind control and attention regulation, which is uncommon. The majority of people struggle to keep their attention under control and to keep their thoughts entirely on one thing for any length of time.
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Suppose the following data were collected by an experimenter who was observing the distance traveled by various gases in a set amount of time through a horizontal glass tube at room temperature and pressure.
Gas Distance (to the nearest cm)
SO2 50
HCl 66
CH4 100
SO3 44
a) state your observations regarding this data as briefly and to the point as possible, and
b) design a hypothesis to explain your observation, and
c) suggest an experiment to test your hypothesis.
We can observe that if a gas has a higher relative molecular mass, it does not cover a large distance hence; "More massive gases do not move a large distance". This can be shown by Graham's law.
What is the diffusion of the gas?Thee term diffusion has to do with the movement of the molecules of the gas from one point to another. We know that the gas in this case was allowed to travel through a horizontal glass tube at room temperature and pressure.
a) We can see from the data of the gas and the relative distance that the gas travelled that the gases that has the largest relative molecular mass tend to travel the least distance through the glass tube.
b) The hypothesis that would support the statement is the; "More massive gases do not move a large distance".
c) An experiment that can be used to test this hypothesis i the experiment of Graham's law.
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Ability to do work.
O Potential Energy
O Energy
O Energy Transformation
Heat
Answer:
Energy
Explanation:
Energy is the ability to do work. I always remember this because that definition has never made any sense to me.
You can do work because of energy.
Hope this helps!
(b) (i) What type of substance will neutralise potassium hydroxide solution?
Answer: An acidic substance
Explanation: An acidic substance will neutralize the potassium hydroxide solution because Potassium hydroxide is a strong base.
Answer:
An acidic substance
Explanation:
maaf kalo salah
point)
This bohr model(X) is showing what element?
5 p
6 n
(X)
Blank 1:
8p
10 n
(Y)
Fig. 4.4
15 p
16 n
(Z)
The element which contains 5 protons and 6 neutrons is Boron (B). The element which contains 8 protons and 10 neutrons is Oxygen (O). The element which contains 15 protons and 16 neutrons is Phosphorous (P).
Boron is the fifth element with a total of 5 electrons. Writing the electron configuration of boron, the first her two electrons enter the 1s orbital. Since 1s can only hold two electrons, the next two electrons of B move to the 2s orbitals. The remaining electrons go to the 2p orbitals.
The Bohr model of oxygen shows eight protons and neutrons in the nucleus, and eight electrons orbiting the nucleus at two energy levels. We know that oxygen has 8 subatomic particles because its atomic number is 8. The first energy level that electrons orbit can hold up to two electrons.
According to the Bohr atomic model, the phosphorus atom consists of 15 protons and 16 neutrons in the nucleus, and 15 electrons orbiting the nucleus in its three shells. K, L, M shells.
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How long will it take for 20% of the C-14 C - 14 atoms in a sample of C-14 C - 14 to decay? half life:5730 years
The time that it would take is 1843 years.
What is the age of the sample?The age of the sample is obtained by the use of the formula;
0.693/[tex]t_{\frac{1}{2} }[/tex] = 2.303/t log (No/N)
Given that;
[tex]t_{\frac{1}{2} }[/tex] = Half life of the C - 14
t = The age of the sample
No = The amount of the sample originally present
N = The amount of the sample present at time t
Given that we are told that 20% of the sample has decayed thus we have only 80% left
0.693/5730 = 2.303/t log(No/0.8No)
1.21 * 10^-4 = 2.303/t log(1.25)
1.21 * 10^-4 = 0.223/t
t = 0.223/1.21 * 10^-4
t = 1843 years
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A square chunk of plastic has a length of 5 cm,
width of 5 cm, and a height of 5 cm. It has a
g. What is its density?
mass of 200
The density of plastic of length of 5 cm, width of 5 cm, and a height of 5 cm would be 1.6 gm / cm3.
In this case
The dimensions of a square chunk of plastic is 5 cm x 5 cm x 5cm.
Mass, m = 200 gm
Density = Mass / Volume
It will form a cube. Hence, the Volume = side x side x side
So ,
d = 200 gm / 5cm x 5 cm x 5 cm
d = 1.6 gm / cm3
Hence , Density is equal to 1.6 gm / cm3.
What is density explain?
Density can be defined as the mass per unit volume. Density Symbol.
Density Formula: ρ = m/V,
where ρ is the density
m is the mass of the object and V can be defined as Volume.
What is a unit of density?
It is commonly expressed in units of grams per cubic cm.
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summarize how energy changes during a chemical reaction as bonds are broken and formed
During a chemical reaction: bonds in the reactants are broken new bonds are made in the products Energy is absorbed to break bonds. Bond-breaking is an endothermic process. Energy is released when new bonds form. Bond-making is an exothermic process.
Energy is absorbed when bonds are broken, and it is evolved when bonds are established.
What are chemical bonds?Chemical bonds is defined as the creation of a chemical compound through the creation of a chemical link between two or more atoms, molecules, or ions. To form bonds, atoms exchange or swap their valence electrons. To reach a complete outer energy level, which is the most stable configuration of electrons, atoms must form chemical bonds.
Because more energy is required to break bonds than is produced when new bonds are formed, energy is absorbed in some reactions. As a result, during a reaction, many kinds of bonds may form. Energy is released as a result of the creation of bonds. Energy is absorbed when bonds are broken.
Thus, when bonds are broken, energy is absorbed, and when bonds are formed, energy is evolved.
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Write a balanced equation for the dissociation equilibrium of acetic acid in water:
Acetic acid upon dissociation in water gives acetate ion and hydrogen ion as written in the chemical equation:
[tex]\rm CH_{3}COOH \rightarrow CH_{3}COO^{-} + H^{+}[/tex].
What is acetic acid?Acetic acid is weak carboxylic acid. It is the simplest organic acid other than formic acid HCOOH. Acetic acid contains one methyl unit and the carboxyl group COOH.
Diluted acetic acid is used as vinegar to preserve food items such as pickle, salads etc. It gives a sore taste to the food also. Acetic acid is soluble in water and will dissociates into carboxylate ion and hydrogen ion.
Even though acetic acid easily loses a proton the carboxylate ion CH3COO- is not stable and it is a weak base the reverse of the reaction dominates in equilibrium.However in the presence of strong acids it can acts as a weak base also.
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The suspect’s ridge characteristics match the ridge characteristics that were gathered from the crime scene. What does this MOST likely mean?
A.
These fingerprints are from the same person.
B.
The probability is low that this is the same person.
C.
These footprints are from different people.
D.
A mistake was made when gathering evidence.
The suspect’s ridge characteristics match the ridge characteristics that were gathered from the crime scene means these fingerprints are from the same person.
Fingerprints have been used for long time in forensic identification purposes thanks to features within their patterns called ridge characteristics or also minutiae. All fingerprints fall into one of three basic overall patterns, the arch, the loop, and the whorl.
Humans have characteristically ridged skin on their fingertips, palms, and also soles. This roughened skin makes it easier to grip things and, up close as well, it appears as patterns of tiny ridges and furrows. The fingertips, palms, and soles can sometimes create a transfer of these patterns when they come into contact with surfaces and objects. The most important of these transfers are fingerprints, made when the tips of the fingers and thumbs make impressions.
So, If the ridge characteristics are matching then there is high chance that those fingerprints are of the same person.
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help me with the question below
The new state of equilibrium result from shift to the right with net increases in [H₂]
Here given reaction is
2HI ⇄ H₂ + I₂
Equilibrium is the state in which opposing forces or action are balanced so that one is not stronger or greater than the other and when a new equilibrium is reached there will be more product than before and when concentration of reactant is increased the equilibrium shift to the right and there will be more product than before so here in this reaction the equilibrium result from shift to the right with net increases in [H₂]
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How many atoms are there in 4.00 moles of glucose, C6H12O6?
Answer:
4 moles of glucose = 4 x 6.022 x 10^23 = 2.4088 x 10^24 molecules of glucose.
There are 2.4088 x 10²⁴ atoms in 4 moles of glucose C₆H₁₂O₆
1 mole of any gas is defined as the number of atoms, molecules or ions present in the gas. 1 mole of any gas equals to 6.022 x 10²³ atoms , ions or molecules . 6.022 x 10²³ is known as avogadro's number.
We need a conversion factor that will converts from moles of glucose, C₆H₁₂O₆ to molecules of glucose.
That is, one mole of any substance contains 6.022 x 10²³ molecule of that substance.
4moles of glucose = 4 x 6.022 x 10²³ = 2.4088 x 10²⁴ molecules of glucose.
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If 280 grams of CO2 is at 13 °C and 445 kilopascal, what is the volume in mL? Just
put in the number. The assumption is the unit is milliliters.
1 atm = 760 torr = 760 mmHg = 101,325 pa = 101.325 kpa = 1.01325 barr = 14.696
p.s.i. = 29.921 inHg
(inHg and p.s.i. are approximations of the metric pressures and are subject to
significant figures)
If 280 grams of CO₂ is at 13 °C and 445 kilopascal, the volume for the given data in the mL is 34,000 mL.
First we need to convert the given pressure in atm, temperature in Kelvin.
T=13+273=286K
P=445 kpa×(1000 pa/1 kpa)×(760 mmHg/101325 pa)×(1 atm/760 mmHg)
=445×1000×1 atm/101325
=445000 atm/101325
=4.3918 atm
The molar mass of CO₂ is 44g/mol and the number of moles of 280g of CO₂ is
moles(n)=280 g×(1 mol/44 g)
=6.3636 mol
According to the ideal gas law
PV=nRT
Where R=0.08206 Latm/molK
Rearrange the formula for V and plug all the values to solve for V
V=(nRT/P)
=(6.3636 mol×0.08206 Latm×286K)/4.3918atm×molK
=149.38435 L/4.3918
=34.0143 L≈34 L
Convert the above volume in L
34 L×(1000 mL/1 L)
=34000 mL
Therefore, the volume of the given data in mL is 34000 mL.
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A chemical reaction is shown below:
Glucose + Oxygen --> Water + Carbon Dioxide
How many grams of water would be produced if the reaction contained each of the following:
20 g of glucose
15 g of oxygen
30 g of carbon dioxide
SELECT AN ANSWER
65 g of water
15 g of water
35 g of water
5 g of water
Answer:
Mass = 8.46 g
Explanation:
Given data Mass of water produced = ? Mass of glucose = 20 g Mass of oxygen = 15 g
Solution:
Chemical equation:
C₆H₁₂O₆ + 6O₂ → 6H₂O + 6CO₂
Number of moles of glucose:
Number of moles = mass/molar mass
Number of moles = 20 g/ 180.16 g/mol
Number of moles = 0.11 mol
Number of moles of oxygen:
Number of moles = mass/molar mass
Number of moles = 15 g/ 32 g/mol
Number of moles = 0.47 mol
now we will compare the moles of water with oxygen and glucose.
C₆H₁₂O₆ : H₂O
1 : 6
0.11 : 6/1×0.11 = 0.66
O₂ : H₂O
6 : 6
0.47 : 0.47
Less number of moles of water are produced by oxygen thus it will limit the yield of water and act as limiting reactant.
Mass of water produced:
Mass = number of moles × molar mass
Mass = 0.47 mol ×18 g/mol
Mass = 8.46 g
Explanation:
Consider this chemical equation: 2Na(s)+Cl2(g) → 2NaCl(s)
In this reaction, sodium (Na) is: .
In this reaction, chlorine (Cl2) is: .
In this reaction, sodium chloride (NaCl) is: answer is soild , gas , soild 2nd part AgNO3 and Cu(NO3)2 3rd part is sliver
From the chemical equation showing the reaction, sodium chloride (NaCl) is a solid.
What is a chemical equation?A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and chemical formulas.
From the reaction above, the reaction of a solid sodium and a chlorine gas gives a result of Sodium chloride solid.
There are some steps to be considered when balancing a chemical equation:
Count each type of atom in reactants and products. ...Place coefficients, as needed, in front of the symbols or formulas to increase the number of atoms or molecules of the substancesRepeat steps 1 and 2 until the equation is balanced.In conclusion, we have the fact that Sodium chloride which is also known commonly known as salt, is an ionic compound with the chemical formula NaCl, representing a 1:1 ratio of sodium and chloride ions.
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If an aerosol can contained 350 mL of CFC gas at a pressure of 5.7 atm, what volume would this gas occupy at 1.0 atm ?
Answer:
2.0 L
Explanation:
P1= first pressure
P2= second pressure
V1= first volume
V2= second volume
P1V1 = P2V2=
(5.7 atm)(350 mL) = (1.0atm)V2
V2= (5.7 atm)(350 mL) / (1.0 atm)=
V2= 1.99500 L = 2.0 L
what will the kid have hair or no hair the mom has no hair also has two lowercase h the dad has hair also have two capital h the picture is the punnett square
Answer:
All of the children will have hair.
Explanation:
Since the Father has Dominant genes, for having hair, and the mother having recessive genes, for not having hair, the Dominant genes override the recessive, making the children have hair.
what is the standard form for a linear equation?
The standard form for a linear equation is Ax + By = C with two variables.
What is a linear equation?Linear equations can be described as the equations of degree 1 and is a mathematical statement, which contains an equal sign (=) between the algebraic expression.
A linear equation is an equation for a straight line and their solutions will produce values, which when substituted for the unknown values and make the equation true.
Linear equations can be described as a combination of constants and variables. The standard form of a linear equation with one variable is expressed as ax + b = 0, where, a ≠ 0 and x is the variable.
A linear equation in two variables is expressed as ax + by + c = 0, where, a ≠ 0, b ≠ 0, x, and y are the variables.
The linear equation in three variables is expressed as ax + by + cz + d = 0, where a ≠ 0, b ≠ 0, c ≠ 0, x, y, z are the variables.
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Can someone please help with 28?
The two half cells are : Fe³⁺ + e⁻ ----> Fe²⁺
Cu²⁺ + 2e⁻ ---> Cu
The standard electrode potential E° cell = 0.43 V
The overall reaction is given as :
Fe³⁺ + Cu -----> Cu²⁺ + Fe²⁺
The two half cells are : Fe³⁺ + e⁻ ----> Fe²⁺ E° = 0.77 V
Cu²⁺ + 2e⁻ ---> Cu E° = 0.34 V
Cu ----> Cu²⁺ + 2e⁻ E° = - 0.34 V
The standard electrode potential E° cell = 0.77 V + (-0.34 V)
= 0.43 V
Thus, The two half cells are : Fe³⁺ + e⁻ ----> Fe²⁺
Cu²⁺ + 2e⁻ ---> Cu
The standard electrode potential E° cell = 0.43 V
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500.0 liters of a gas are prepared at 700.0 mmHg and 200.0 °C. The gas is placed into a tank under high pressure. When the tank
cools to 20.0 °C, the pressure of the gas is 30.0 atm. What is the volume of the gas?
1.530 L
153.3 L
24.75 L
9.510 L
The volume of the gas is 9.510 L
What is molar volume of gas?
The molar volume, symbol Vm, or of a substance in chemistry and related sciences is the ratio of the volume occupied by a material to the amount of substance, usually provided at a certain temperature and pressure. It is calculated by dividing the molar mass (M) by the mass density (): The SI measure for molar volume is cubic metres per mole (m3/mol), however it is more common to use cubic decimetres per mole (dm3/mol) for gases and cubic centimetres per mole (cm3/mol) for liquids and solids.
According to the combined gas equation,
P1V1/T1 = P2V2/T2
given a constant molar amount of gas
P1V1/T1 = P2V2/T2
V2 = 9.510 L
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Which of the following is the correct electron
configuration for titanium (Ti)?
O 1s²2s²2p63s²3p64s²30²
O1s²2s²2p63s23p63d4
O1s²2s²2p53s²3p64s²4p²
Answer: Option choice 1
The electronic configuration are found to be useful in determining the valency of an element. The electronic configuration of titanium is 1s²2s²2p63s²3p64s²3d². The correct option is A.
What is electronic configuration?The distribution of the electrons in an atomic orbitals of an element is represented by the electronic configuration. The elements with similar electronic configurations tend to exhibit similar properties. The electronic configuration also called the electronic structure.
The titanium is a 'd' block element also called the transition element whose atomic number is 22. By knowing the atomic number the electronic configuration is written as 1s²2s²2p63s²3p64s²3d². Each element has its own electronic configuration.
The electronic configuration of an element generally obeys the Aufbau principle, Pauli's exclusion principle and Hund's rule. The electronic configurations are the summary of where the electrons are found around a nucleus.
Thus the correct option is A.
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A compound has the empirical
formula given below.
C7H502
Which compound represents the molecular
formula with a scale factor of 2?
C14H10O4
C3.5H2.5O
C7H5O2
The molecular formula is obtained from the empirical formula by multiplying with an integer which is get by dividing the molecular mass by the formula mass. Thus if the integer is 2, then the molecular formula of the compound is C₁₄H₁₀O₄.
What is molecular formula?The molecular formula of a compound is used to represent the atom present in the compound with their correct number of moles. The empirical formula is derived from the mass percents of the elements in the whole compound.
The integer we get from dividing the molar mass by the formula mass is multiplied with the numbers in the empirical formula to get the molecular formula. Here, the empirical formula is C₇H₅O₂. Thus by multiplying it by 2 we get C₁₄H₁₀O₄.
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It is the simplest whole number ratio of elements in a compound. Molecular formula is n times the empirical formula, where n is integers 1,2,... The molecular formula is C[tex]_{14}[/tex]H[tex]_{10}[/tex]O[tex]_{4}[/tex].
What is empirical formula?
Empirical formula gives the proportion of the element that is present in a compound. It does not give information about the actual number or the arrangements of the atoms.
n= molecular formula÷ empirical formula
Empirical formula =C[tex]_7[/tex]H[tex]_5[/tex]0[tex]_2[/tex]
n=2
Substituting the given values
2= molecular formula÷ C[tex]_7[/tex]H[tex]_5[/tex]0[tex]_2[/tex]
molecular formula= C[tex]_7[/tex]H[tex]_5[/tex]0[tex]_2[/tex]×2
molecular formula=C[tex]_{14}[/tex]H[tex]_{10}[/tex]O[tex]_{4}[/tex]
Therefore, the molecular formula of the compound C[tex]_7[/tex]H[tex]_5[/tex]0[tex]_2[/tex] is C[tex]_{14}[/tex]H[tex]_{10}[/tex]O[tex]_{4}[/tex].
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is it possible to study allkind of ecosystem at one time?
Need help!!!!
H3C-CH-CH3
CH₂ CH3
1. The branched alkane contain 4 carbon in the parent chain and 1 substituent group
2. The branched alkane 10 carbon parent chain and 1 substituent group
A branched chain alkane or branched alkane is an alkane which has alkyl group bonded to its central carbon chain and branched alkane contain only carbon and hydrogen atom and with carbon connected to other carbon by single bond and the longest continuous chain of carbon atom is the parent chain and if there is no longest chain because two or more chain are the same longest length then the parent chain defined as the one with most branches and the substituent atom or group of atom substituent in place of hydrogen atom on the parent chain of hydrocarbon that's why here in the first picture the the branched alkane contain 4 carbon in the parent chain and 1 substituent group and in the second picture the branched alkane 10 carbon parent chain and 1 substituent group
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Onisha wants to sort 20 objects into
groups by their color. She wants to record
what object was in each group. Which
would be the best way to record her
sorting?
A Draw each of the objects she sorted
and staple each drawing into a group.
B Make a chart and list the objects into
groups the way she sorted them.
Make a bar graph that shows how
many objects of each color there are.
D List all the objects and put a
checkmark by all the blue objects.p
Consider these two entries from a fictional table of standard reduction potentials.
X3++3e−⟶X(s)o=−1.75 V
Y3++3e−⟶Y(s)o=−0.50 V
What is the standard potential of a galvanic (voltaic) cell where X is the anode and Y is the cathode?
ocell=
The standard electrode potential of the voltaic cell is 1.25 V.
What is the cell potential?We know that a cell is composed of the anode and the cathode. Current would always enter in via the abode and then leave via the cathode. In any case, there is a metallic conductor that would always acts as a conduit for the electrons to pass through.
In this case, we can see the the cathode and the anode. The cathode is the part of the cell that gains electrons and is reduced while the anode is the part of the cell that is oxidized and there is a loss of electron there.
Now the cell potential can be obtained from;
standard potential = electrode potential of the cathode- Electrode potential of the anode
The standard potential = (-0.50) - (−1.75)
= 1.25 V
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Consider an experiment that mixes aqueous barium chloride with aqueous sodium sulphate. Write the balanced equation for the reaction and determine the g of precipitate formed. Given the following data, what is your % yield for the experiment? BaCl2 (aq) + Na2SO4 (aq) → BaSO4 (s) + 2NaCl (aq)
Mass of barium chloride 4.50g
Mass of sodium sulfate 3.80g
Mass of dried precipitate 4.39g
The balanced equation of the reaction: [tex]BaCl_2 (aq) + Na_2SO_4 (aq) --- > BaSO_4 (s) + 2NaCl (aq)[/tex]
The percent yield of the experiment: 81.75%
Stoichiometric problemFrom the balanced equation of the reaction: [tex]BaCl_2 (aq) + Na_2SO_4 (aq) --- > BaSO_4 (s) + 2NaCl (aq)[/tex]
The mole ratio of the barium chloride and sodium sulfate is 1:1.
Recall that: mole = mass/molar mass
Molar mass of barium chloride = 208.23 g/mol
Molar mass of sodium sulfate = 142.04 g/mol
Mole of 4.50 g barium chloride = 4.50/208.23
= 0.023 mol
Mole of 3,80 g sodium sulfate = 3.80/142.04
= 0.027 g/mol
From the moles calculated, sodium sulfate is in excess while barium chloride is the limiting reactant.
The mole ratio of barium chloride and barium sulfate is 1:1. Thus, the equivalent mole of barium sulfate will also be 0.023 mol.
Molar mass of barium sulfate = 233.43 g/mol
Mass of 0.023 mol barium sulfate = 0.023 x 233.43
= 5.37 g
Percent yield of barium sulfate = 4.39/5.37 x 100
= 81.75%
Thus, the percent yield of the reaction is 81.75%.
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Neptune has 14 moons. Moons usually orbit a planet or dwarf planet, though some have been observed orbiting asteroids. What role, if any, does gravity play when it comes to a body’s orbit? Explain
Answer:
Explanation:
gravity plays the role of the force that keeps the moon "attached" to the body. Gravity is pulling the moon into the planet, as long as the moon has a velocity that keeps it from falling directly into the planet it will orbit
A chemical equation is shown below.
HgS + O2 → HgO + SO2
What are the coefficients that should be added to balance this equation? Use complete sentences to explain your answer.
Explain how this chemical reaction demonstrates the conservation of mass.
The coefficients that should be added to balance the chemical equation are: 2, 3, 2, 2
How do I determine the coefficients?Coefficients are numbers written before elements or compounds in a chemical equation in order to balance it.
To obtain the coefficients, we shall balance the equation. This is illustrated below.
HgS + O₂ → HgO + SO₂
There are 3 atoms of O on the right and 2 atoms on the left. It can be balance by writing 3 before O₂, 2 before HgO and 2 before SO₂ as shown below
HgS + 3O₂ → 2HgO + 2SO₂
There are 2 atoms of Hg on the right and 1 atom on the left. It can be balance by writing 2 before HgS as shown below
2HgS + 3O₂ → 2HgO + 2SO₂
Now, the equation is balanced!
Thus, the coefficients needed are 2, 3, 2, 2
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Polyethylene is 86% C and 14% H. Determine the empirical formula of the compound of the compound
Percent to mass: How many grams of C and H are present in 100 g
A 86 g C and 14 g H
B 14 g C and 86 g H
C 12 g and 1 g
1. The empirical formula of the compound, given that it contains 86% C and 14% H is CH₂
2. The mass of C and H present in 100 g of the compound are: 86 g C and 14 g H (Option A)
1. How do I determine the empirical formula?
The empirical formula of the compound can be obtained as illustrated below:
Carbon (C) = 86%Hydrogen (H) = 14%Empirical formula =?Divide by their molar mass
C = 86/ 12 = 7.167
H = 14 / 1 = 14
Divide by the smallest
C = 7.176 / 7.167 = 1
H = 14 / 7.167 = 2
Thus, from the above calculation, we can conclude that the empirical formula of the compound is CH₂
2. How do I determine the mass of C and H?
The mass of C and H in 100 grams of the compound can be obtained as illustrated below
Mass of compound = 100 gPercentage of C = 86%Mass of C =?Mass of C = Percentage of C × mass of compound
Mass of C = 86% × 100
Mass of C = 0.86 × 100
Mass of C = 86 g
Mass of compound = 100 gPercentage of H = 14%Mass of H =?Mass of H = Percentage of H × mass of compound
Mass of H = 14% × 100
Mass of H = 0.14 × 100
Mass of H = 14 g
Thus, the mass of C and H are: 86 g C and 14 g H (Option A)
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