Answer:
Hydrocarbons
Hydrocarbons are chemical compounds that contain the elements carbon and hydrogen only. They are compounds that are obtained from the fossil fuel crude oil by a process called fractional distillation.
Fractional distillation
Fractional distillation separates the crude oil mixture into a number of smaller, different parts called fractions. The fractionating column is hot at the bottom and cool at the top. Substances with high boiling points condense at the bottom and substances with lower boiling points condense on the way to the top.
The crude oil is evaporated and its vapours condense at different temperatures in the fractionating column. Each fraction contains hydrocarbon molecules with a similar number of carbon atoms, smaller molecules nearer the top and longer molecules nearer the base of the column.
Oil fractions
The diagram below summarises the main fractions from crude oil and their uses and the trends in properties. Note that the gases leave at the top of the column, the liquids condense in the middle and the solids stay at the bottom.
Explanation:
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The substances which are generally used to generate heat and light energy on burning are called fuels. The diesel fuel contains the largest molecules. Thus option A is correct.
What is Diesel?The diesel fuel which is also called the diesel oil is found to be a combustible liquid and it is produced from the fractions of crude oil. The diesel fuel is found to be less volatile than the gasoline.
The chemical composition of a diesel fuel is usually denoted as C₁₂H₂₄. Apart from the carbon and hydrogen atoms small amounts of 'S', 'N' and 'O' are also present in the diesel.
Here gasoline is a derivative product obtained by the fractional distillation of crude oil and it is generally used in passenger vehicles whereas kerosene is a highly flammable liquid obtained from the distillation of petrol and is less volatile than gasoline.
The gasoline contains only 4 to 12 'C' atoms per molecule and it is a lightweight hydrocarbon mixture. The number of 'C' atoms in kerosene ranges from 10 to 16 per molecule and the diesel fuel is known as the heavyweight hydrocarbon mixture with 8 to 21 'C' atoms per molecule.
Thus diesel fuel consists of larger hydrocarbon molecules than gasoline and kerosene.
Thus the correct option is A - Diesel.
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Select the correct answer. Which electromagnetic wave has the longest wavelength? microwaves O B. infrared rays O C. X-rays radio waves
Answer:
microwaves
Explanation:
Microwaves and radio waves are the longest wavelengths while the shortest are gamma rays and x-rays
Which of these are characteristics of all arthropods? (Select all that apply.)
six legs
segmented bodies
jointed appendages
exoskeleton
Answer:
segmented bodies, jointed appendages, & exoskeleton
Explanation:
Hope you succeed, have a nice day!
A student combines 20.0 grams of hydrogen and 20.0 grams of oxygen in a reaction. According to the law of conservation of mass, how many grams of water should be produced?
A)20.0grams B)40.0grams C)30.0grams D)10.0grams
Answer:
A)20.0grams
Explanation:
Answer:
10
Explanation:
If I dilute 250 mL of 0.50 M lithium acetate solution to a volume of 750 mL, what will the concentration of this solution be?
Answer:
The right answer is "0.17 M".
Explanation:
The given values are:
Volume,
V₁ = 250 mL
V₂ = 750 mL
Molarity,
M₁ = 0.50 M
M₂ = ?
As we know,
⇒ [tex]M_1 V_1=M_2 V_2[/tex]
or,
⇒ [tex]M_2=\frac{M_1 V_1}{V_2}[/tex]
On substituting the values, we get
⇒ [tex]=\frac{0.50\times 250}{750}[/tex]
⇒ [tex]=\frac{125}{750}[/tex]
⇒ [tex]=0.17 \ M[/tex]
What is the volume of a canister filled with gas if its pressure is changed to 9.8 atm from 2.5 atm at a volume of 9.1 L?
Answer:
2.3 L
Explanation:
A change in pressure-volume at constant temperature is described by the Boyle's law. The mathematical relationship between initial pressure and volume (P₁ and V₁) and final pressure and volume (P₂ and V₂) is given by:
P₁V₁ = P₂V₂
We have the following data:
initial pressure: P₁= 2.5 atm
initial volume: V₁ = 9.1 L
final pressure: P₂= 9.8 atm
Thus, we introduce the data in the mathematical expression and calculate the final volume V₂, as follows:
V₂ = P₁V₁/P₂ = (2.5 atm x 9.1 L)/9.8 atm = 2.3 L
Therefore, the volume of the canister is 2.3 L.
What are the 2 common uses for Polonium?
Consider the combustion of pentane (C5H12)
a. Write the complete, balanced equation:
b. Determine the limiting reactant if 62.5 grams of pentane combine with 107 L of oxygen gas at STP.
c. If 54.6 L of CO2 gas is produced in the experiment, what is the percent yield?
Explanation:
C5H12 + 8O2 → 5CO2 +6H2O
balanced✓
stable✓
What characterizes a radioactive atom?
A. Its nucleus is unstable.
O B. Its nucleus has too few quarks.
O C. Its electrons gain energy.
O D. Its protons repel the neutrons.
. Its nucleus is unstable.
Its nucleus is unstable. This characterizes a radioactive atom. Therefore, the correct option is option A.
What is radioactive atom?The smallest parts of common stuff that can be separated without releasing electrically charged particles are called atoms. The atoms are divided into two sections. an electron cloud and an atomic nucleus. Atoms with an unstable nucleus and the potential for radioactive decay are referred to as radioactive atoms.
As only nuclei often experience decay and changes with electron configuration only come from nucleus configuration changes, the term "radioactive atom" is misleading. This isn't a rule, it must be said. As a parent nucleus needs capture any of its orbital electrons, the electron cloud also plays a significant role in the case of electron capture. Its nucleus is unstable. This characterizes a radioactive atom.
Therefore, the correct option is option A.
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Help me with this please
Answer:
–253.5 °C
Explanation:
We'll begin by calculating the number of mole in 6 g of CO₂. This can be obtained as follow:
Molar mass of CO₂ = 12 + (2×16)
= 12 + 32
= 44 g/mol
Mass of CO₂ = 6 g
Mole of CO₂ =.?
Mole = mass / molar mass
Mole of CO₂ = 6 / 44
Mole of CO₂ = 0.136 mole
Next, we shall convert 225 mL to L.
1000 mL = 1 L
Therefore,
225 mL = 225 mL × 1 L / 1000
225 mL = 0.225 L
Next, we shall determine the temperature of the gas. This can be obtained as follow:
Pressure (P) = 0.855 atm
Volume (V) = 0.225 L
Number of mole (n) = 0.136 mole
Gas constant (R) = 0.0821 atm.L/Kmol
Temperature (T) =?
PV =nRT
0.855 × 0.255 = 0.136 × 0.0821 × T
0.218025 = 0.0111656 × T
Divide both side by 0.0111656
T = 0.218025 / 0.0111656
T = 19.5 K
Finally, we shall convert 19.5 K to degree celsius (°C). This can be obtained as follow:
T(°C) = T(K) – 273
T(K) = 19.5 K
T(°C) = 19.5 – 273
T(°C) = –253.5 °C
Therefore, the temperature of the gas is –253.5 °C
At 35.0°C and 3.00 atm pressure, a gas has a volume of 1.40 L. What pressure does the gas have at 0.00°C and a volume of 0.950 L? Which equation should you use? P subscript 2 equals StartFraction P subscript 1 V subscript 1 T subscript 2 over T subscript 1 V subscript 2 EndFraction. P subscript 2 equals StartFraction T subscript 1 V subscript 2 over P subscript 1 V subscript 1 T subscript 2 EndFraction. P subscript 2 StartFraction equals V subscript 1 V subscript 2 over T subscript 1 T subscript 2 EndFraction P subscript 1.
Answer:
a
3.92
Explanation:
I come in many different colors and I get bigger when I’m full. I will float away if you don’t tie me down and I will make a loud sound if I break. What am I?
i'm b.o.r.e.d
Answer:
BalloonExplanation:
It comes in different colors, it expands when it's "full". It floats away if it is not tied down and will make a loud noise if it pops (breaks).
A chemist mixed two substances together: a colorless liquid with a strong smell and a white solid with no smell. The substances’ repeating groups of atoms are shown above on the left. After they were mixed, the chemist analyzed the results and found two substances. One ending substance had the repeating group of atoms shown above on the right.
Is the ending substance the same substance as the colorless liquid? What happened to the atoms of the starting substances when the ending substances formed? Be sure to explain your answers to both of these questions.
Answer:
colorless liquid with a strong smell and a white solid with no smell. The substances’ repeating groups of atoms are shown above on the left. After they were mixed, the chemist analyzed the results and found two substances. One ending substance had the repeating group of atoms shown above on the right.
Explanation:
Molar mass of 500g of Cl2
Explanation:
What's Your Question ??..
how many molecules are in 23 moles of oxygen
Answer:
1.385 x 1025 molecules are there in 23 mole of oxygen
In P plants the gene for the color of the sea has two alleys in the punnets square show me love the dominant alley Y represents yellow and recessive alley Y represents green based on the punnets square what percentage of offspring would be expected to have a green seeds
Answer:
25%.
Explanation:
In the F1 generation, the yellow colour is dominant so 75% of the seeds are yellow colour while on the other hand, 25% seeds are green in colour due to recessive allele. In the F1 generation, the ratio of dominant to recessive allele is 3:1. So on the basis of this 3:1 ratio we can say that there is 75% of yellow colour seeds and 25% of green colour seeds in the population of F1 generation.
Which is a physical property of a substance?
A. It is flammable.
B. It is odourless.
C. It is corrosive.
D. It explodes when a spark is present.
Explanation:
It explodes when a spark is present.. letter D
Answer:
A. It is flammable.
Explanation:
physical property is a characteristic of matter that is not associated with a change in its chemical composition. Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity.
A solution is 5.00% by volume of ethanol dissolved in water. How many mL of ethanol are in 500 mL of the solution?
Answer:
[tex]v_{solute}=25mL[/tex]
Explanation:
Hello there!
In this case, according to the by-volume concentration of this solution, it is possible for us to use its mathematical definition as shown below:
[tex]\%v=\frac{v_{solute}}{v_{solution}}*100\%[/tex]
Thus, given the percent and the volume of the solution, we can solve for the volume of ethanol (solute) as shown below:
[tex]v_{solute}=\frac{\%v*v_{solution}}{100\% }\\\\v_{solute}=\frac{5.00\%*500mL}{100\%}\\\\ v_{solute}=25mL[/tex]
Best regards!
dichlorine monoxide is polar or nonpolar ?
Answer:
( dichlorine monoxide ) is Polar Explanation:Answer. Answer = CF2Cl2 (Dichlorodifluoromethane) is Polar What is polar and non-polar? Cl2O ( dichlorine monoxide ) is Polar I'll tell you the polar or nonpolar list below.
Three moles of oxygen gas is stored in a 2.5-liter container at 35°C. What is the pressure of this gas?
Answer:
30.34 atm
Explanation:
Using the general gas law formula;
PV = nRT
Where;
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
T = temperature (K)
R = gas law constant (0.0821 Latm/molK)
According to the information provided in this question,
n = 3mol
T = 35°C = 35 + 273 = 308K
V = 2.5L
P = ?
Using PV = nRT
P = nRT/V
P = 3 × 0.0821 × 308/2.5
P = 75.8604 ÷ 2.5
P = 30.34 atm.
life under the sun i need the summaries
Alcohol and water are placed into closed-end manometer, in order to measure the vapor pressure of each of the 2 liquids at 25oC. the figure represents the observation few hours after placing the liquids.
a) Calculate the Vapor pressure of alcohol P vapor (alcohol) in mmHg and atm.
(choose 2 answers!)
1) Vapor pressure in mmHg = 100mm Hg
2) Vapor pressure in mmHg = 50mm HG
3) Vapor pressure in atm = 0.13 atm
4) Vapor pressure in atm = 0.26 atm
Answer:
3) Vapor pressure in atm = 0.13 atm
Explanation:
A gas is collected at 25.0 °C and 755.0 mm Hg. When the temperature is
changed to 0 °C, what is the resulting pressure?
Answer:
691.7 mmHg is the resulting pressure
Explanation:
Tha Gay-Lussac's law states that the pressure of a gas is directly proportional to its absolute temperature under constant volume. The equation is:
P1T2 = P2T1
Where P is pressure and T asbolute temperature of 1, initial state and 2, final state of the gas.
Computing the values of the problem:
T1 = 273 + 25 = 298K
P1 = 755.0mmHg
T2 = 273 + 0 = 273K
P2 = ?
755.0mmHg*273K = P2*298K
691.7 mmHg is the resulting pressureGiven the following data set, calculate the unknown quantity.
P= 1.23 mmHg atm, V=? kL, n= .773 mol, T= 152 °C
Answer:
V ≈ 16,662.63 L
Explanation:
The data given in the question includes;
The pressure in the medium, P = 1.23 mmHg
The number of moles of the substance present in the medium, n = 0.773 mol
The temperature of the substance in the medium, T = 152 °C = 425.15 K
The unknown quantity, V = The volume filled by the substance
The ideal gas law equation that can be used to find the unknown volume is given here as follows;
P × V = n × R × T
Where;
R = The Universal Gas Constant = 62.363 mmHg·L·mol⁻¹·K⁻¹
From the ideal gas law equation, we get;
V = n × R × T/P
Plugging in the values, gives;
V = 0.773 mol × 62.363 mmHg·L·mol⁻¹·K⁻¹ × 425.15 K/(1.23 mmHg) = 16,662.6305405 L
The volume occupied, which is the unknown quantity, V ≈ 16,662.63 L.
PLS HELP ASAP ON BOTH
Answer:
mesosphere
I hope this helps a little bit.
Which one of the following [H+] concentrations represents an acidic solution?
A
1.9 x 10–2 M
B
1.8 x 10–8 M
C
1 x 10–7 M
D
3 x 10–14 M
what is the physical change of a liquid to a solid by the removal of heat?
¿Cuál de las siguientes reacciones se encuentra CORRECTAMENTE balanceada?
A.
CH4+2O2→CO2+3H2O
B.
CH4+3O2→CO2+2H2O
C.
2KClO3→2KCl+3O2
D.
3KClO3→3KCl+2O2
Answer:
opción c es la respuesta correcta espero que te ayude
WILL GIVE 50 points I can’t get on to the website so plz help.
Explanation:
can you tell us what do want help with?
Answer:
Ok I will give you answer
How many grams of sucrose will I add to the water (0.100 L) in order to make the 3 molal solution.
Answer:
mass = 102.69 g of sucrose
Explanation:
First, you need to use the correct expression of molality (m) which is the following:
m = moles / kg solvent (1)
According to the exercise, we need to get the grams, in other words, the mass of the sucrose. To get the mass, we need the moles and molecular weight of sucrose and use the following expression:
moles = mass / MM (2)
Now, if we replace (2) in (1) we have:
m = mass / MM * kg solvent (3)
From here, we solve for the mass and then:
mass = m * MM * kg solvent (4)
Now, then density of water is 1 kg/L, so, the volume of the water will be the same as it's mass, and the molality is 3 m. The molecular weight of the sucrose is (according to several sources) 342.3 g/mol. Replacing all the data in (4) we have:
mass = 3 mol/kg * 0.1 kg * 342.3 g/mol
mass = 102.69 g of sucroseHope this helps
Using the Periodic Table, Which of the following has the largest atomic radius/size?
So
Ti
О а
Ob
Ос
Od
Y
Zr
Answer:
vp jokhimon vf dpp gl fl vk hggjuvg7vvohohohohojj