C4H8(g)⟶2C2H4(g)
has an activation energy of 262 kJ/mol.
At 600.0 K, the rate constant, , is 6.1×10−8 s−1. What is the value of the rate constant at 820.0 K?
The value of the rate constant at 820.0 K is 0.2 s^-1
Applying the Arrhenius equation, which is...
k = Ae-Ea/RT
Applying the formula, we get
lnk2 = lnk1 - (Ea/R)(1/T2 - 1/T1)
Applying the values, we get
ln k2 = ln 6.1x10^-8 - (2.62x10^3/8.314)(1/820 - 1/600)
Calculating the value, we get...
ln k2 = -0.31
Taking power e, we get
k2 = 0.2 s^-1
Arrhenius equation relates the temperature and activation energy of a reaction.It is helpful in studying the different parameters related to reaction.Activation energy is the minimum required to attain to form the product.To learn more about the activation energy visit:
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2 NO(g) + O₂(g) 2 NO2(g)
5.)
A student investigates the reactions of nitrogen oxides. One of the reactions in the investigation requires an equimolar
mixture of NO(g) and NO, (g), which the student produces by using the reaction represented above.
(a) The particle-level representation of the equimolar mixture of NO(g) and NO₂(g) in the flask at the completion of the
reaction between NO(g) and O, (g) is shown below in the box on the right. In the box below on the left, draw the
particle-level representation of the reactant mixture NO(g) and O₂(g) that would yield the product mixture shown in
the box on the right. In your drawing, represent oxygen atoms and nitrogen atoms as indicated below.
Oxygen atom =
Reactant Mixture
Nitrogen atom =
Product Mixture
The moles of oxygen and nitrogen (ii) oxide required to give the product is 2 moles of oxygen and 8 moles of nitrogen.
What is a chemical reaction?A chemical reaction is a reaction in which atoms of elements or compounds undergoes changes to form new substances.
Chemical reactions are not easily reversible as a result of the large heat changes involved.
In the given reaction, oxygen reacts with nitrogen (ii) oxide to form nitrogen (iv) oxide.
The equation of the reaction is given below:
2 NO(g) + O₂(g) 2 NO₂(g)Considering the particle diagram shown, the product mixture consists of four moles of nitrogen (iv) oxide and four moles of nitrogen (ii) oxide. This indicates that the nitrogen (ii) oxide that reacted with oxygen was in excess.
From the equation of reaction, one mole of oxygen reacts with nitrogen(ii) oxide to produce two moles of nitrogen (iv) oxide.
Therefore, moles of oxygen that reacted with nitrogen(ii) oxide = 4 moles * 1/2 = 2 moles
moles of nitrogen (iv) oxide that reacted will be:
4 moles (unreacted) + 2 * 2 moles = 8 moles.
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Part C
Convert 8x10-4 kg to micrograms.
Express your answer with the appropriate units. Use the appropriate metric symbols for the units.
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What is the difference between
a. Acid and Base
b. Weak acid and strong acid
c. Organic acid and minerals acid
d. Neutral salt and minerals acid
Base is a proton acceptor, whereas acid is a proton giver.
Strong acid and strong base depend upon ionization.
Acid is a hydrogen ion donor and base is a hydrogen ion acceptor.When an acid is dissolved in water, all of its molecules disintegrate, making the acid powerful. When an acid is dissolved in water, only a small number of its molecules disintegrate, making the acid weak.A strong acid is an acid in which all of the acid is dissolved in water, its molecules disintegrate.A weak acid is an acid in which only a few molecules break apart when the acid is dissolved in water.Mineral acids are inorganic compounds consisting of different chemical element combinations, whereas organic acids are organic molecules mostly composed of carbon and hydrogen atoms. This is the main difference between mineral acids and organic acids.Mineral acids are inorganic compounds consisting of different chemical element combinations, The acid for which pH is close to 7 is a neutral acid.To learn more about acids visit:
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3 The chemical compositions of two substances, W and X, are given.
W Na(AISI³)O8
X Ca(Al₂Si₂)08
Which statements are correct?
1 W and X contain the same amount of oxygen.
2 W contains three times as much silicon as X.
3 X contains twice as much aluminium as W.
A) 1 and 2 B) 1 and 3 C) 2 and 3 D) 1, 2 and 3
Answer:
D) 1,2 and 3 is the answer
Write an equation that shows the formation of the bromide ion from a neutral bromine atom.
The equation that shows the formation of the bromide ion from a neutral bromine atom is as follows: Br + e- → Br-
What is an ion?Ion is the atom or group of atoms bearing an electrical charge, such as the sodium and chlorine atoms in a salt solution.
An atom becomes an ion when it loses or gains electrons.
According to this question, bromine atom is neutrally charged but quicky becomes charged into an ion when it gains one electron. The equation is represented as follows:
Br + e- → Br-
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How many moles are present in each of the following at STP?
A.54.5 dm3 CH4
B.250.0 cm3 CO
1. The number of mole of 54.5 dm³ of CH₄ at STP is 2.43 moles of CH₄
2. The number of mole of 250 cm³ of CO at STP is 0.01 mole
Volume of gas at STPAt standard temperature and pressure (STP),
1 mole of gas = 22.4 dm³ = 22400 cm³
1. How to determine the mole of 54.5 dm³ of CH₄At standard temperature and pressure (STP),
22.4 dm³ = 1 mole of CH₄
Therefore,
54.5 dm³ = (54.5 dm³ × 1 mole) / 22.4 dm³
54.5 dm³ = 2.43 moles of CH₄
2. How to determine the mole of 250 cm³ of COAt standard temperature and pressure STP,
22400 cm³ = 1 mole of CO
Therefore,
250 cm³ = (250 cm³ × 1 mole) / 22400 cm³
250 cm³ =0.01 mole of CO
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A "fuzzy cloud" around the nucleus of an atom where an electron is likely to
be found is called
a) an orbital b) valence shell c) ground state
d) none of these
A "fuzzy cloud" around the nucleus of an atom where an electron is likely to be found will be called an orbital. Option A.
What are orbitals?Orbitals are regions within the atom where electrons can be found.
A typical electron contains electrons that are negatively charged, protons that are positively charged, and neutrons that have no charges.
The positively charged protons and neutral neutrons form the core or the nucleus of the atom. The electrons, on the other hand, are located outside the nucleus.
The regions where electrons of atoms are located are collectively called orbitals.
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how many grams is there if you have 2.85x10^-4 with 176g/mol
0.05016 grams is there if you have 2.85x10^-4 with 176g/mol.
The mass of a certain molecule is its molecular mass, which is expressed in daltons. Because they contain various isotopes of an element, multiple molecules of the same substance can have distinct molecular weights.
mole = 2.85x10^-4
mol. weight = 176g/mol
Formula,
mole = weight taken / mol. wt of the compound
2.85x10^-4 = weight taken / 176g/mol
weight taken = 2.85x10^-4 x 176g/mol
=0.05016 grams
0.05016 grams is there if you have 2.85x10^-4 with 176g/mol.
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HELPPP
Ferric chloride combines with water in a reversible reaction to produce ferric hydroxide and hydrochloric acid as shown.
FeCl3 + 3H₂0 Fe(OH)3 + 3HCI
Which reaction must occur at the same time as the formation of ferric hydroxide?
(1 point)
O Fe(OH)3 + 3HCI → FeCl3 + 3H₂O
O FeCl3 + 3HCI → Fe(OH)3 +3H₂O
O FeCl3 Fe + 3Cl
O 2H₂O → H₂ + O₂
The reaction that will occur at the same time as the formation of ferric hydroxide will be [tex]Fe(OH)_3 + 3HCI --- > FeCl_3 + 3H_2O[/tex].
What is a reversible reaction?A reversible reaction is a reaction that proceeds both forward and backward at the same time.
In other words, it is a reaction in which as the reactants react to form products, the products simultaneously react to form reactants.
Thus, looking at the original forward reaction:
[tex]FeCl_3 + 3H_2O --- > Fe(OH)_3 + 3HCI[/tex]
Ferric chloride reacts with water to form ferric hydroxide and hydrochloric acid. Since the reaction is reversible, the ferric hydroxide and hydrochloric acid formed will simultaneously be reacting to form the reactants.
In other words, the reaction that will occur at the same time as the formation of ferric hydroxide will be:
[tex]Fe(OH)_3 + 3HCI --- > FeCl_3 + 3H_2O[/tex]
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How do you find the number of
electrons in a neutral atom?
Select the correct answer.
According to Newton's law of universal gravitation, what is the effect of gravity on two objects as the distance between them increases?
OA. The force of gravity increases.
OB. The force increases by twice the previous amount.
OC. There is no effect on the force of gravity.
O D. The force of gravity decreases.
Answer:
Since gravitational force is inversely proportional to the square of the separation distance between the two interacting objects, more separation distance will result in weaker gravitational forces. So as two objects are separated from each other, the force of gravitational attraction between them also decreases.
Answer:
The force of gravity decreases.
Explanation:
Plato/Edmentum
6. How can an answer from an experiment be verified?
Redo
Explanation:
if the experiment is been done twice or more and if gives the same answer the experiment is verified
In ironmaking, iron metal can be separated from iron ore (Fe2O3) by heating the ore in a blast furnace in the presence of coke, which is a form of carbon: 2 Fe2O3(s) + 3 C(s) → 4 Fe(s) + 3 CO2(g) If 1000 kg of iron ore and 120 kg of coke are heated in a blast furnace, determine the limiting reactant, the theoretical yield of iron metal, and the theoretical yield of carbon dioxide.
The limiting reactant is iron ore, the theoretical yield of iron metal is 701.344 kg, and the theoretical yield of carbon dioxide is 413.292 kg.
Stoichiometric problemFrom the equation of the reaction:
[tex]2 Fe_2O_3(s) + 3 C(s) --- > 4 Fe(s) + 3 CO_2(g)[/tex]
The mole ratio of iron ore to carbon is 2:3.
Mole of 1000 kg of iron ore = 1000000/159.69
= 6,262 moles
Mole of 120 kg carbon = 120000/12
= 10,000 moles
Thus, it appears that the carbon is in excess while the iron ore is limited in availability.
The mole ratio of the iron ore and the iron produced is 1:2. Thus, the equivalent number of moles of iron produced will be:
6,262 x 2 = 12,524 moles
Mass of 12,524 moles of iron = 12,524 x 56
= 701,344 g or 701.344 kg
Thus, the theoretical yield of iron is 701.344 kg.
The mole ratio of the iron ore and the carbon dioxide produced is 2:3. The equivalent mole of carbon dioxide produced will be:
6,262 x 3/2 = 9,393 moles
Mass of 9,393 moles carbon dioxide = 9,393 x 44
= 413,292 or 413.292 kg
The theoretical yield of carbon dioxide is, therefore, 413.292 kg.
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A 0.5 kilogram piece of aluminum increases its temperature 7 degrees C when heat energy is added. How much heat is produced this change in temperature
Answer: Heat energy (Q) added is 3150 (J) .
Explanation:
A single population is made of
O multiple organisms of the
same species.
O multiple organisms of different species.
• multiple communities.
O multiple biomes.
Which of the following describes a difference between thunderstorms and hurricanes?
A Hurricanes last for a shorter period of time than thunderstorms.
B
Thunderstorms have much stronger winds than hurricanes.
с Thunderstorms don't have a spiral wind formation and hurricanes do.
D
Hurricanes form over warm land while thunderstorms form over water.
Answer:
The answer to your question is C. Thunderstorms don't have a spiral wind formation and hurricanes do. Hope this helps.
Explanation:
Students measured the area of Mr. Gandelman’s classroom. They noted that it is 74.27 square meters. According to measurements indicated in the architect’s plans, the room’s actual area is 78.5 square meters. What is the % error in the students’ measurement?
Answer:
Personally I think thatthr answer could be 5.38853503%, you can round it however you need.
Explanation:
There's a value of error between the noted square meters and the actual room's area. which is 4.23. Using the formula to get the percentage of error is getting the value (78.5 - 74.27 = 4.23) and dividing it by 78.5. Then just multiply it by 100 to get the percentage.
0.3060 x 10^17 atoms of Kr(g) = how many moles ?
There are 0.05 x [tex]10^{-6}[/tex] number of moles of Kr(g) having 0.3060 x [tex]10^{17\\}[/tex]atoms .
A mole is 6.02214076 x 1023 of any chemical unit, including atoms, molecules, ions, and others. Due to the large number of atoms, molecules, or other components that make up any substance, the mole is a useful measure to utilize.
Calculation .
One mole of the any atoms contains 6.022 x [tex]10^{23}[/tex] atoms .
So , the number of moles of Kr(g) having 0.3060 x 10^17 atoms is calculated as ,
number of moles of Kr = 0.3060 x [tex]10^{17\\}[/tex]atoms x 1 mole / 6.022 x [tex]10^{23}[/tex]atoms
number of moles of Kr = 0.05 x [tex]10^{-6}[/tex] mole
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Can somebody help me so I can give you a brain list if it right
Answer:true
Explanation:
if you change the sequence, the answer you get may be wrong.
The nucleus of an atom contains which subatomic partcles?
Answer:
The nucleus contains two types of subatomic particles, protons and neutrons. The protons have a positive electrical charge and the neutrons have no electrical charge. A third type of subatomic particle, electrons, move around the nucleus. The electrons have a negative electrical charge.
Question 5 of 10
When you think about whether most people are basically good or basically
bad, you are:
A. repeating beliefs you learned from your family.
B. exploring your own beliefs.
C. deciding what actions to take in your life.
OD. accepting the values of others.
SUBMIT
When you think about whether most people are basically good or basically
bad, you are exploring your own beliefs.
A person's beliefs will influence how they make decisions and react to circumstances. Most often, beliefs are established throughout childhood or other formative experiences.According to psychology, Beliefs can be positive or negative. Finding one's core beliefs can be difficult at times. It can take a lot of introspection, and some people might need a therapist's help to uncover their core beliefs.The downward arrow method can be used to identify your core beliefs. This entails tracing each idea back to the fundamental belief it was based on.You might occasionally make unfair or unjust assumptions about someone as a result of your attitudes and beliefs.therefore, according to the above-explained points, the above statement justifies the point of exploring your own beliefs.
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what to use to measure The volume of a small stone.
Answer:
One way to measure the volume of any irregular object (in your case, a stone) is to submerge it completely under water and measure the change in the height of the water level.
Explanation:
Answer: WELCOME TO BRAINLY
Explanation: One way to measure the volume of any irregular object (in your case, a stone) is to submerge it completely under water and measure the change in the height of the water level. This change in the water level (let's say it goes from 50 mIlliliters to 65 milliliters) indicates that the stone has a volume of 15 milliliters.
Hope this helps!
Red gold is a gold-copper alloy used to make jewlery. A piece of jewlery made of red gold weighs 8.97g and has a volume of 0.528cm3. Gold has a density of 19.3g/cm3 and copper has a density of 8.96g/cm3. Calculate the percentage by mass of each metal in jewelry. Assume the total volume of the jewelry is the sum of the volumes of the two metals it contains
Percent of gold and copper are 88.2 and 11.8
Red gold is a gold-copper alloy used to make jewelry .
Let the mass of gold be m1
Let the mass of copper be m2
We are given that m1+m2 =8.97 g
We know that volume is the ratio of mass to density
Thus
m1/d1 + m2/d2 = 0.528 cm3
where d1 and d2 is the density of gold and copper
m1/19.3 + m2/8.96 = 0.528
8.96m1 +19.3 m2 = 0.528 x 19.3 x 8.96 = 91.305
putting m1 = 8.97 - m2
8.96 ( 8.97 - m2 ) + 19.3 m2 = 91.305
80.3712 - 8.96m2 + 19.3 m2 =91.305
10.34 m2 = 91.305-80.3712
m2 = 10.9338 /10.34
=1.0537gm
m1=8.97-1.0537
=7.91gm
Therefore, percent of gold = 7.91/8.97 x 100 =88.20%
percent of copper = 100-88.2=11.8%
Therefore, percent of gold and copper are 88.2 and 11.8
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Describe a chemical change using atoms and molecules?
Explanation:
In a chemical reaction, the atoms and molecules that interact with each other are called reactants. In a chemical reaction, the atoms and molecules produced by the reaction are called products. In a chemical reaction, only the atoms present in the reactants can end up in the products.
Answer:
In a chemical change, the atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed, the change is called a chemical change.
Explanation:
Chemical changes occur when bonds are broken and/or formed between molecules or atoms. This means that one substance with a certain set of properties (such as melting point, color, taste, etc) is turned into a different substance with different properties.
There are 25 elements found in living things. How many of these elements are found in some organisms but not all?
1
6
19
25
Answer: 6
Explanation: There are 25 elements found in living things. How many of these elements are found in some organisms but not all? 1 6 19 25
PLEASE HELP
Claim: Write a Claim statement
How does the abundance(amount) of each isotope affect the average atomic mass of a mixture of atoms of the same element?
The average atomic mass of a mixture of atoms of the same element will...
The abundance(amount) of each isotope determines the relative atomic mass.
What is the relative atomic mass?The relative atomic mass refers to the mass of the atom that is obtained by adding together the products of the relative atomic masses of each isotope and the relative abundance of the isotope.
Hence, we can say that, since the relative atomic mass takes into account the masses and percentage abundance of all the isotopes, it then follows that the abundance(amount) of each isotope determines the relative atomic mass.
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If you begin with a sample of carbon dioxide at − 60.0 ∘C and 0.50 atm and warm it to 30.0 ∘C and 0.50 atm , then there will be no phase transition in the sample. true or false
If a sample of carbon dioxide is at − 60.0 ∘C and 0.50 atm and warm to 30.0 ∘C and 0.50 atm, then there will be no phase transition in the sample is a True statement.
Phase Transition:
The three main states of matter are Solid, Liquid, and gas. A phase transition occurs from one state of matter to another when energy is supplied or cut.When energy is supplied to the molecules, solid converts to liquid, and liquid converts to gas. Then, the energy increases the speed of the molecules, the density decreases and phase transition takes place.On the other hand, when the supply of energy is stopped from the molecules, the gas turns to liquid, and liquid converts to solid. Both the temperature and pressure are in the same phase.Therefore, there will be no phase transition in the sample. Hence, it is a true statement.
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A student uses a diagram to show the scale sizes of the planets. Which planet’s diameter would be approximately the distance across the United States?
The planet’s diameter would be approximately the distance across the United States Mercury.
What is planet mercury known for?
It is known to be the Fastest Planet as well as the one that is very close to the Sun.Mercury is one that tends to travel a lot faster than others. Mercury is seen as one that is known for being the fastest planet as well as having the shortest distance to travel around the Sun, which is about 88 days.Therefore, The planet’s diameter which would be approximately the distance of the United States is Mercury.
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Which of the following statements is a hypothesis?
A Why do I see more rats at a smoker's house than
a non-smoker's house
B I think that cigarette smoke increases the
appetite of rats
C
I will place three rats in three separate cages and
expose them to varying amounts of cigarette smoke
D The rat which exposed to the most smoke, ate a
larger amount of cheese compared to the other rats
Correct hypothesis is 'i will place three rats in three separate cages and
expose them to varying amounts of cigarette smoke'
Here given statement C is correct in hypothesis because when we place three rats in three separate cages and expose them to varying amounts of cigarette smoke then 50% rat are kill because nicotine concentration in the mainstream smoke particulate matter of reference cigarettes are 70%-8% and it take 20 min to kill the rats
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