The enthalpy of combustion of 1 mole of benzene is 3169 kJ/mol .
The first step in answering this question is to obtain the balanced thermochemical equation of the reaction. The thermochemical equation shows the amount of heat lost or gained.
The thermochemical equation for the combustion of benzene is;
2 C6H6(l) + 15 O2(g) → 12 CO2(g) + 6 H2O(g) ΔrH° = -3169 kJ/mol
We can see that 1 mole of benzene releases about 3169 kJ/mol of heat.
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Answer:
-3169 kJ/mol
Explanation:
9.
a
What is the energy of a wave having a frequency of 5.71 x 1013 Hz?
Answer:
[tex] \huge{3.783 \times {10}^{ - 19} \: J}[/tex]
Explanation:
The energy of the wave can be found by using the formula
E = hfwhere
E is the energy
f is the frequency
h is the Planck's constant which is
6.626 × 10-³⁴ Js
From the question we have
E = 6.626 × 10-³⁴ × 5.71 × 10¹³
We have the final answer as
[tex]3.783 \times {10}^{ - 19} \: J[/tex]
Hope this helps you
How long is a bench? Select the best estimate.
4 centimeters
4 milllimeters
4 kilometers
4 meters
Answer:
4 meters
Explanation:
4 centimeters and millimeters are too small, while 4 kilometers is too large.
what do you think will happen to the kidneys if any of these parts were damaged?
Answer:
When your kidneys are damage waste products and fluid can build up in your body. That can cause swelling in your ankles nausea weakness poor sleep and shortness of breath. so without treatement the damage can get worse and your kidney may eventually stop working.A) Oxygen
B) water and oxygen
C) water and carbon dioxide
D) water and carbon monoxide
Answer:
A
Explanation:
this is because combustion is the chemical reaction between surfaces including OXYGEN to generate heat and light in the form of flame
Elements in a vertical column on the Periodic Table have similar properties and are all members of the same
of elements.
ME
A
molecule
HD
B
phase
С
atom
D
group
Answer:
Explanation:
I think it's D but I could be wrong
Answer:
D
Explanation:
Which of these statements are true? Select all that apply. The Delta. Hf for Br2(I) is 0 kJ/mol. The Delta. Hf for He(I) is 0 kJ/mol. The Delta. Hf for Hg(I) is 0 kJ/mol. The Delta. Hf for Cl2(g) is 0 kJ/mol. The Delta. Hf for N2(I) is 0 kJ/mol.
The enthalpy of formation of liquid mercury and gaseous chlorine are zero because the substance are in their standard state.
The standard state of a substance is the form in which it is found under standard conditions. This include a pressure of 1 atm, a temperature of 298 K and a a concentration of 1 M.
The enthalpy of formation of a substance in its standard state is 0 KJ/mol. The following substances has ΔHf of 0 kJ/mol.
ΔHf of Hg(I) is 0 kJ/mol. ΔHf of Cl2(g) is 0 kJ/molLearn more: https://brainly.com/question/13164491
This boy said he was finna destroy me and winked what does that mean
Answer:
pipe
Explanation:
You receiving
I will give thanks, profile thanks, brainliest and 5 star
Answer: E.) C2N2H8
Explanation:
Answer:
E ) C2N2H8
Explanation:
which reaction is an oxidation-reduction reaction?
Answer:
pl
saponification palmitate
Would an alkaline earth metal make a good replacement for tin in a tin can?
Answer:
Definitely not. This is because the alkaline earth metal [basically group 2 elements] are reactive and will react with the contents of the can, contaminating it.
No, alkaline earth metals would not be a good replacement for tin in a tin can because alkali from alkaline earth metals react with tin and release hydrogen.
What are alkaline earth metals?Alkaline earth metals are present in group 2 of the periodic table. They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).
They are called alkaline earth metals because their hydroxide and oxides are highly alkaline. Their metal oxides are found in the earth's crust.
These metals have 2 electrons in their outer shell, and they are highly reactive, so they will react with the tin in a tin can.
Thus, alkali from alkaline earth metals react with tin and generate hydrogen, hence they would not make an acceptable replacement for tin in a tin can.
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Liquids have a definite volume when poured into a container. What does this mean?
Answer:
A solid has definite volume and definite shape, a gas has neither definite volume nor definite shape, and as said in the question, a liquid has a definite volume but no definite shape.
What this means is that even though liquid molecules can slide past each other and move to fill up the space they are in (this means that liquids have no definite shape), they keep their volume. That is, liquids have consistent, unchanging volume.
Hopefully that's helpful! :)
How many grams of iron are in 350 mg of iron? *
O A. 3.50 g
O B.0.350 g
O C.35.09
Answer:
It s B because 350 mg= 35.0cg=3.50dg=0.350
Answer:
its 0.350 letter B
Explanation:
im pretty sure you divide the mass value by 1000 to get you answer.
Please I need helppppp
Answer:
[tex]FeCl_{2} +H_{2} S->FeS + 2HCl[/tex]
Explanation:
I am assuming that we have to balance this equation. On the left side, we have one Fe, 2 H, 2 Cl, and 1 S. On the right side, we have 1 Fe, 1 H, 1 Cl, and 1 S. Adding a 2 as a coefficient in front of the HCl on the right side will make 2 H and 2 Cl instead, balancing the overall equation.
FeCl_{2} +H_{2} S- > FeS + 2HClFeCl 2 +H 2 S−>FeS+2HCl
5 Stoichiometry Chemistry questions !
1. Determine the mass in grams of lithium hydroxide produced when 0.38 g of lithium nitride reacts. g LiOH
Li3N(s) + 3 H2O(l) --> NH3(g) + 3 LiOH(aq)
2. How many moles of sodium chloride are produced when 2.9 grams of sodium iodide reacts? mol NaCl
2 NaI(s) + Cl2(g) --> 2 NaCl(s) + I2(g)
3. What volume in liters of chlorine gas at STP would be required to fully react with 125 g of NaI? L Cl2
2 NaI(s) + Cl2(g) --> 2 NaCl(s) + I2(g)
4. Determine the volume in liters of carbon dioxide produced at STP when 0.85 grams of butane (C4H10) reacts. L CO2
2 C4H10(l) + 13 O2(g) --> 8 CO2(g) + 10 H2O(g)
5. Calculate the mass in grams of water vapor produced by the combustion of 51.3 L of propane, C3H8, at STP. g H2O
C3H8(g) + 5 O2(g) --> 3 CO2(g) + 4 H2O(g)
HELP ME PLEASE HURRY
The characteristics of two different types of reactions are shown below:
Reaction A: Electrons are gained by the atoms of an element.
Reaction B: Protons are lost by the atom of an element.
Which statement is true about the atoms of the elements that participate in the two reactions?
Their identity changes in both Reaction A and Reaction B.
Their identity changes in Reaction A but not in Reaction B.
Their identity changes in Reaction B but not in Reaction A.
Their identity remains the same in both Reaction A and Reaction B.
Answer:
D is correct
Explanation:
Answer:
A
Explanation:
Electrons are gained by the atoms. There is no change in the nucleus of the atom and the number of protons remains identical.
Select the correct answer. In which situation is chemical energy being converted to another form of energy? A. a lamp plugged into the electric grid B. a fluttering flag C. a floating wooden log D. a burning candle
Answer:
D. A burning candle. (chemical energy into energy of heat and light, i.e. thermal and wave)
Explanation:
comment and tell me if it right.
The situation in which chemical energy being converted to another form of energy is a burning candle.
So, option D is correct one.
What is chemical energy?The energy produce by the chemical reaction is called chemical energy.
Example: burning of candle.
Give the example of energy conversion.When lamp plugged into electric grid then electrical energy is converted into light energy.When candle is burn then chemical energy is converted into light energy.No energy takes place during a fluttering flag and a floating wooden log.learn more about chemical energy,
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The more impressive the tail of a male peacock, the higher its chances of finding a mate. Female peacocks choose mates based on the color of the feathers and the overall physical prowess of the animal. However, a genetic mutation called leucism can produce a peacock with only white feathers. This mutation causes the inability of pigment to be deposited into their feathers which results in a white appearance. What would you infer to be the fitness of the white peacock? Choose ALL that apply.
A) The females will equally choose the brightly colored and white peacocks as mates.
B) White peacocks are highly prized, thought to symbolize purity, eternity, and unconditional love, making them desirable mates.
C) If females choose the brightest males as partners, the ones without the impressive tails will be less likely to mate and reproduce.
D) White peacocks are highly prized, thought to symbolize purity, eternity, and unconditional love, causing them to be selectively bred for their unique trait.
E) The peacocks with colored tails will be picked over the white peacocks as mates, causing the peacocks with the white mutation to die out of the population over time
Leucism is a genetic mutation caused by an alteration of a nucleotide. The less brightly colored tails of the peacock will have less chance to mate.
What is selection?Selection is the natural process in which the organism with better trait quality is preferred and selected over another species. They are fit to survive in an altered condition.
The genetic mutation can lead to speciation and selection of the fittest organisms. The type of behavior selection results in the preference of the partners based on the mating and reproducing capabilities.
Therefore, option C. the peacock without impressive tails will be less likely to mate and reproduce.
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PLEASE HELP QUICK I NEED 14-16 (JUST 6 PROBLEMS) ANSWERED AND FULL WORK SHOWN FOR FACTOR LABEL METHOD ITS 100 POINTS AND I WILL MARK BRAINLYEST.
Answer:
14. 21.51 liters
15. 12.9 centimeters
16. 3400 milliliters
Explanation:
I don't really know how to show the work
How many atoms are in 11.5g of Hg
Make a super hero with the property of Science neutrons
Answer:
The poster should include:
TITLE: Creative name of superhero.
DESCRIPTION OF ELEMENT SUPERHERO (2 PARAGRAPHS):
This section should include a brief description of how your superhero acquired, used, or lived
with their element power. You may want to describe where does your superhero element lives
(where in nature can it be found). What are his/her superpowers? Does your superhero
element have a hideout? What are his/her strengths? What is his/her weakness? Who is
his/her arch nemesis (evil super villain)? What kind of super suit does your superhero have?
5 FACTS:
This section should include at least 5 fun facts about your element. You can choose to
describe facts that illustrate where your element is found in nature. You may also wish to
describe what is your element used for. You may address what are characteristics of your
element or what are important uses of your element. For example, can your element be made
into something useful or can your element combine with other elements to make something
totally different.)
ATOMIC DRAWING
Include the atomic structure of your element with correct labeling of its protons neutrons,
electrons. Make sure your drawing has the correct number of protons, neutrons, electrons.
DRAWING OF YOUR ELEMENT SUPERHERO
This section should include a drawing (in color) of your Element Superhero on a clean sheet of
WHITE paper. You may want to draw your Element Superhero fighting his nemesis (super
villain). Or you may want to draw your Element Superhero using his special powers.Explanation:
as the distance from the nucleus increases, what happens?
The nuclear effective charge decreases as the energy of repulsion between the atoms increases between one another. The farther away an atom is from the nucleus, the more loosely that is attracted to that nucleus.
An endothermic reaction occurs when water and ammonium nitrate are combined. Which of the following statements correctly
describes the energy changes in the reaction?
OA. Energy is released because the reactants have more chemical energy than the products.
OB. Energy is absorbed because the reactants have more chemical energy than the products,
OC. Energy is absorbed because the products have more chemical energy than the reactants.
OD. Energy is released because the products have more chemical energy than the reactants.
Answer:
C.Energy is absorbed because the products have more chemical energy than the reactants.
Explanation:
what is the difference between hydrophilic and hydrophobic?
a chemical reaction in which bonds are broken is usually associated with
the release of energy
The bowl of fruit has a mass of 2.2 kg.
What net force must act on the bowl of fruit to make it accelerate to the right
at a rate of 4.4 m/s2? (Hint: Use F = ma.)
A. F = 9.68 N right
B. F = 9.68 N left
C. F = 6.60 N left
D. F= 6.60 N right
Taking into account the Newton's second law, the correct answer is option A. F = 9.68 N right
In first place, acceleration in a body occurs when a force acts on a body.
Newton's second law states that a force will change the speed of an object because the speed and/or direction will change. These changes in velocity are called acceleration.
So, Newton's second law defines the relationship between force and acceleration mathematically. This law says that the acceleration of an object is directly proportional to the sum of all the forces acting on it and inversely proportional to the mass of the object
Mathematically, Newton's second law is expressed as:
F= m×a
where:
F = Force [N] m = Mass [kg] a = Acceleration [m/s²]In this case, you know:
F= ? m= 2.2 kg a= 4.4 m/s²Replacing in Newton's second law:
F= 2.2 kg× 4.4 m/s²
Solving:
F= 9.68 N
Finally, As the bowl of fruit accelerates to the right, the correct answer is option A. F = 9.68 N right
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good and bad effects of changes in materials in the environment
Answer:
Composting, recycling, technological development, water cycle and photosynthesis are changes that have good effects. Some changes have bad effect like pollution and destruction of habitat and lose of lives.
Explanation:
hope it helps
What is the relationship between layering of fluids and density?
Density of a liquid determines how it will layer (heaviest to lightest). If the liquid is least dense it will float to the bottom. Layers will remain separated because each liquid is actually floating on top of the more dense liquid beneath it.
Consider the van deemter equation. why does increasing the flow rate reduce the contribution of longitudinal diffusion to total plate height?
Answer:
Why does increasing the flow rate reduce the contribution of longitudinal diffusion to total plate height? Increasing the flow rate decreases the time the solute resides in the column, resulting in less diffusional broadening.
Explanation:
what do solid and gas-particle have in common? (not liquid )
Answer:
Solid, liquid, and gas are common states of matter. Because each particle is attached to several others, individual particles cannot move from one location to another, and the solid is rigid. A has a fixed volume but does not have a fixed shape. Liquids take on the shape of the container they are in.
Explanation:
sorry, this is what i think
Help me Please
Is boiling an egg a physical or a chemical change? Explain your answer.
Answer:
it's a chemistry change
Explanation:
this is because heat is causing permanent changes and can no longer be changed back to its original atate