Answer:
we dont have summer breaks here
A student made a sketch of a potential energy diagram to represent a reaction with a -^H
Explain, using complete sentences, why the diagram made by the student is correct or incorrect. Be sure to also explain
what the values of X and Y represent.
Answer: It’s correct because it’s showing an exothermic reaction. x is the reactants and y is the products.
Explanation: -ΔH means the reaction is exothermic and releasing heat. This lowers the potential energy.
Answer:
answer above is correct
Explanation:
If a material conducts heat easily, it is a good__________________. The answer has to be 18 letters long please type in the right answer please and tank you
Please answer if you know it I need this today this question is only for people who have done it or they know the answer. Please answer this I need to know the answer please and thank you have a good day! It would be amazing if I got an A+ on my final test! PLEASE HELP AND PLEASE ANSWER IF YOU KNOW THE ANSWER PLEASE HELP!!!!!!!!!!
AND DO NOT PUT IT ON NO FILE OR NOTHING PLEASE AND I MEAN IT PLEASE DON'T I CAN'T OPEN IT PLEASE DON'T PUT ANSWER ON FLIE PLEASE!!!!!!!!!!!!!!!
Answer:
Thermal Conductor
Explanation:
A galvanic cell generates a cell potential of 0.32V when operated under standard conditions according to the reaction above. Which conditions are needed to construct a similar cell that generates the lowest cell potential?
The complete question is shown in the image attached to this answer.
Answer:
C
Explanation:
Let us quickly remember that the EMF of a cell under non standard conditions in given by the Nernst equation.
This equation states that;
E = E°cell - 0.592/n log Q
Where
E = EMF under non standard conditions
E°cell= standard EMF of the cell
n = number of electrons transferred
Q = reaction quotient
If the reaction quotient is greater than 1 then cell potential is less than the standard cell potential.
The cell that generates the lowest cell potential is the cell depicted in option C because Q has the greatest positive value(Q<1).
The cell potential is the redox potential that measures the acquired to lost electrons at the electrodes. The lowest cell potential is generated by cell C with 0.5 M.
What is EMF?EMF is the electromotive force that is the total of the electric potential difference produced at the half cells of the galvanic cell (electrochemical cell).
EMF of the cell is given as,
[tex]\rm E = \rm E^{\circ} - \dfrac{0.592}{n}\; log Q[/tex]
Here, E is the electromotive force, [tex]\rm E^{\circ}[/tex] is the standard EMF, n is the number of the transferred electrons, and Q is the reaction quotient.
When the reaction quotient (Q) is greater than 1 then, cell potential will be less than standard cell potential.
Therefore, cell C with 0.5 M and Q > 1 is a similar cell.
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What volume in liters of fluorine gas is needed to form 999 L of sulfur hexafluoride gas if the following reaction takes place at 2.00 atm and 273.15 K: S(s) + 3F₂(g) → SF₆ (g)
Answer: A volume of 2997 liters of fluorine gas is needed to form 999 L of sulfur hexafluoride gas if the given reaction takes place at 2.00 atm and 273.15 K.
Explanation:
The given reaction is as follows.
[tex]S(s) + 3F_{2}(g) \rightarrow SF_{6}(g)[/tex]
This show that 3 moles of fluorine is reacting to give 1 moles of sulfur hexafluoride.
According to the ideal gas formula,
PV = nRT
This means that volume of a gas is directly proportional to the number of moles. Hence, volume of fluorine required is calculated as follows.
[tex]3 \times 999 L\\= 2997 L[/tex]
Thus, we can conclude that a volume of 2997 liters of fluorine gas is needed to form 999 L of sulfur hexafluoride gas if the given reaction takes place at 2.00 atm and 273.15 K.
What is the name of Earth's home galaxy?
The Milky Way
The Elliptical
The Spiral Way
The Irregular
100 points
Answer:
The Milky Way
Explanation:
Answer:
Your answer is the Milky WAy!
Brainliest?
Cyclohexane (C6H12) is found in gasoline. It is burned for fuel in a combustion reaction. The unbalanced combustion reaction for octane is shown below. C6H12 + O2 + CO2 + H2O + heat When the reaction is balanced, how many carbon dioxide molecules are produced for every cyclohexane molecule burned? O A1 O B. 9 O c. 6 O D. 3
Answer:
6
Explanation:
C[tex]_6[/tex]H[tex]_{12}[/tex] + O[tex]_2[/tex] → CO[tex]_2[/tex] +H[tex]_2[/tex]O + heat can be balanced as C[tex]_6[/tex]H[tex]_{12}[/tex] + 6O[tex]_2[/tex] → 6CO[tex]_2[/tex] +6 H[tex]_2[/tex]O + heat. Therefore, the correct option is option C.
What is combustion reaction?
Combustion is a chemical reaction that often involves the presence of oxygen and produces light and heat within the form of flames. Because of the physical characteristics of the chemical process and the fact that more energy is produced than can be released through the surrounding medium, the rate or speed with which the substances that react combine is high. As a result, the ambient temperature about the reactants is increased, accelerating the reaction even further.
A lit match is a common illustration of a combustion reaction. A flame is produced when a match strikes something because friction warms the head of the match to a temperature where the chemicals respond by creating additional heat than can be released into the atmosphere. C[tex]_6[/tex]H[tex]_{12}[/tex] + O[tex]_2[/tex] → CO[tex]_2[/tex] +H[tex]_2[/tex]O + heat can be balanced as C[tex]_6[/tex]H[tex]_{12}[/tex] + 6O[tex]_2[/tex] → 6CO[tex]_2[/tex] +6 H[tex]_2[/tex]O + heat
Therefore, the correct option is option C.
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250 mL of water is collected during a combustion reaction. The temperature in the
room is 23 °C and the pressure is 105 kPa. How many moles of water was collected?
Answer:
0.011 moles
Explanation:
Applying,
PV = nRT.................... Equation 1
Where P = Pressure, V = Volume, n = number of moles, R = Molar gas constant, T = Temperature.
Make n the subject of the equation
n = PV/RT.................. Equation 2
From the question,
Given: P = 105 kPa = (105×0.00986923) = 1.036 atm, V = 250 mL = 0.25 L, T = 23 °C = (273+23) = 296 °C
Constant: R = 0.082 atm.dm³/K.mol
Substitute these values into equation 2
n = (1.036×0.25)/(0.082×296)
n = 0.011 moles
How can air pollution affect plants?
A. Air pollution can block sunlight from reaching plants.
B. Air pollution can affect the water plants need.
C. Air pollution absorbs carbon dioxide.
D. Air pollution can change normal temperatures of a region.
Answer:
C. air pollution absorbs carbon dioxide
Explanation:
Carbon dioxide's role in the greenhouse effect is a major contributor to air pollution. Radiation and heat emanating from the earth's surface need to be released out into the atmosphere. But because carbon dioxide levels are so high, there is an ozone effect on the ground level.
Which type of reaction to alkenes generally undergo?
Answer:
Two types of reaction
Explanation:
Alkanes undergo only substitution reactions but alkenes and alkynes undergo both substitution and addition reactions
hydrocarbon.
4-ethyl-3-methyloctane
Answer:
The answer to your question is given below.
Explanation:
From the question given above, we obtained the following:
Name of compound =>
4–ethyl–3–methyloctane
Structure of compound =>?
To successfully draw the structure of the compound given above, we must note the following:
1. The parent name of the compound is octane. This implies that the longest continuous carbon chain is 8.
2. The compound contains only single bond since it a member of the alkane family.
3. Ethyl (–CH₂CH₃) and methyl (–CH₃) are substituent group attached to the compound.
4. Ethyl (–CH₂CH₃) is located carbon 4 while methyl (–CH₃) is located at carbon 3.
With the above information in mind, we can successfully draw the structure of the compound.
Please see attached photo for the structure of the compound.
For the following example identify the following h2o
Answer:
Explanation:
Well you didn’t send a picture of the question but h2O is water so. If the questions answer has a option of water then pick that one
With the help of mole ratio one can predict:
ck12 = both A & B
Moles of product formed from a certain number of moles of reactant
Moles of reactant required for a certain number of moles of product
Answer:
D. Both A and B
Explanation:
got it right
The force needed to overcome the attraction among molecules at the surface of a liquid is called?
Answer:
The type of force is known as cohesive force
A student is performing an acid-base extraction on unknown compounds, and she extracts the organic layer with 5% HCl solution and separates off the aqueous layer. She then adds sodium hydroxide solution to the aqueous layer and observes a white precipitate. Which of the following functional group(s) is most likely in the precipitated compound?
a. ether
b. amine
c. carboxylic acid
d. ester
Answer:
amine
Explanation:
We have to bear in mind that amines are basic compounds. This idea will be very important in attempting to answer this question.
So, when she adds 5% HCl solution in order to extract the organic layer, the amine forms a hydrochloride salt which is contained in the aqueous layer.
The addition of a base such as NaOH leads to the formation of a white precipitate of the amine.
why are some properties of water different than those of the reactants gases
Answer:
The difference in the properties of water can be attributed to physical changes to the hydrogen and oxygen atoms on a subatomic level. The properties of the gases are combined to give water its properties. When substances chemically combine, products with completely different properties form.
Answer:
They are composed of different atoms
Explanation:
The guy above me said it better :|
consider the unbalanced chemical equation hf + al -> alf3 + h2. when coefficients are added to balance the equation, which two substances have a coefficient of two?
a. hf
b. alf3
c. h2
d. al
Answer:
a
Explanation:
because you need to add 2 to to hf to make it equal to h2
Name the functional group in the
following molecule:
CH3CH2OCH2CH3
A ester
B. acid anhydride
C ketone
D. ether
Answer:
d
Explanation:
i just did it
The functional group in the following molecule CH₃CH₂OCH₂CH₃ is ether.
What is functional group?Functional group is defined as a substituent or group of atoms or an atom which causes chemical reactions.Each functional group will react similarly regardless to the parent carbon chain to which it is attached.This helps in prediction of chemical reactions.
The reactivity of functional group can be enhanced by making modifications in the functional group .Atoms present in functional groups are linked to each other by means of covalent bonds.They are named along with organic compounds according to IUPAC nomenclature.
Functional group inter conversion is also possible by retro -synthesis.In some cases , functional groups can be charged molecules.
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How much heat is given off when 16 g liquid methanol (CH3OH) at its freezing point
changes to solid methanol? (methanol AH+ = 3.16 kJ/mol)
A. 0.79 kJ
B. 0.18 kJ
C. 1.58 kJ
D. 0.36 kJ
Answer:
c. 1.58 KJ
Explanation:
I took the test:)
Answer:
1.58 KJ
Explanation:
Chemistry explaining the vapour pressure
Answer:
Vapor pressure is defined as the pressure exerted by a vapor in thermodynamic equilibrium with its condensed phases (solid or liquid) at a given temperature in a closed system.
Explanation:
what class is sodiumtrioxocarbonate(IV) strong or weak base and why?
Answer:
Strong Base
Explanation:
sodiumtrioxocarbonate(IV) Na2CO3 exists in various forms such as; an anhydrous form or in a crystalline form. Usually, the manufacturing process of sodiumtrioxocarbonate(IV) Na2CO3 is known as the Solvay process.
Now, upon reaction, Na2CO3 reacts to yield CO⁻₃. That appears to be a conjugate base of a weak acid. Thus, the occurrence of the removal of H⁺ resultt into Carbonic acid, i.e. a Strong Base.
Sodium (Na) has an ionic charge of +1. Sodium forms an ionic bond with Chlorine (Cl) to form table salt. What charge must the chlorine ion have?
PLS ANSWER LEGITIMATLEY! THANKS! WILL MARK BRAINLIEST!
Explanation:
sodium has a positive charge and chlorine has a negative charge a negative and a positive charge you automatically for an ionic bond therefore the chlorine has to have a negative one charge
Which organ produces the female hormone estrogen
Answer:
it is B Ovary.
Explanation:
Answer:
answer b
Explanation:
it says it above
What is the total energy (in Joules) required to raise the temperature
of 630 g of water from 20°C to 110°C?
Are there any parts of the human body that get oxygen directly from the air and not from the blood?
Answer: Cornea
Explanation: The cornea is the only part of a human body that has no blood supply as it gets oxygen directly through the air.
what is a recessive allele in a genotype is represented by pleaseee helpp
ррррно да
Level 1
12
11
10
B
2
IA А
3
С C
8.
7.
1 D
# - tic
А д-
а.
Answer:
tic
Explanation:
because it is my answer okay
10 points of bullying
Answer: Bullying is not good!
What is the relationship between temperature and volume?
Answer:
Charles's law states that the volume of a given amount of gas is directly proportional to its temperature on the kelvin scale when the pressure is held constant
The volume of a given gas sample is directly proportional to its absolute temperature at constant pressure (Charles's law). The volume of a given amount of gas is inversely proportional to its pressure when temperature is held constant (Boyle's law)
Explanation:
~Hope this helps
This is for my science class.
A donut falls from a table and has a kinetic energy of 2 joules when it hits the floor. How much kinetic energy would it have had if it was twice the mass?
Answer:
4 joules
Hope this helps if it does consider giving brainliest
Cya on the next one!
Explanation:
4 joules.
When it left the table it would have mgh potential energy that would have been converted to kinetic when it hit the floor. If the mass (m) was twice the energy would have been twice.
How many grams of NaCI are dissolved in a 500.0 mL of a 0.04M solution of NaCI?
A: 0.05 g
B: 1.17 g
C: 1.46 g
D: 2.92 g
Answer:
B 1.17
Explanation:
There is .02 mols of nacl in a .4M solution
so you multiply by the molar weight of NaCl (58.44)