Answers
Answer:
A. Empirical formula => C₂H₄O
B. Molecular formula => C₄H₈O₂
Explanation:
From the question given above, the following data were obtained:
Mass of C = 0.273 g
Mass of H = 0.046 g
Mass of O = 0.182 g
Molar mass of compound = 88 g/mol
A. Determination of the empirical formula of the compound.
C = 0.273 g
H = 0.046 g
O = 0.182 g
Divide by their molar mass
C = 0.273 /12 = 0.023
H = 0.046 /1 = 0.046
O = 0.182 /16 = 0.011
Divide by the smallest
C = 0.023 / 0.011 = 2
H = 0.046 / 0.011 = 4
O = 0.011 / 0.011 = 1
Thus, the empirical formula of the compound is C₂H₄O
B. Determination of the molecular formula of the compound.
Empirical formula = C₂H₄O
Molar mass of compound = 88 g/mol
Molecular formula =?
Molecular formula = [C₂H₄O]ₙ
[C₂H₄O]ₙ = 88
[(12×2) + (4×1) + 16]n = 88
[24 + 4 + 16]n = 88
44n = 88
Divide both side by 44
n = 88 / 44
n = 2
Molecular formula = [C₂H₄O]ₙ
Molecular formula = [C₂H₄O]₂
Molecular formula = C₄H₈O₂
Related Questions
Can a combination reaction be a redox reaction
Answers
Answer:
Yes.
Explanation:
A combination reaction can be a redox reaction.
Example; C + O2 = CO2
When it comes to latent print deposits for fingerprints, what are the two categories of surfaces? Provide at least one example of each category.
Answers
Answer: The two categories is porous evidence and nonporous evidence. Nonporous item of evidence is when you put the latent print on the surface and it just sits on the surface. Porous item of evidence is when you put the latent print on the surface and it absorbs the latent print deposit.
2Mg + O2 → 2Mgo
What is the greatest amount of MgO (in moles) that can be made with 7.8 moles of Mg and 4.7
moles of O,? Which is the limiting reactant? Which reactant is in excess, and how many moles
of it are left over?
Answers
Answer:
it would be 4.5 mole left over
Explanation:
The greatest amount of MgO will be 7.8 mole and Mg will be limiting reagent.
What is limiting reagent?The substance that would be entirely absorbed in the end of the chemical process is called as the limiting reagent.
What is mole?A mole would be defined as the quantity of a material that includes precisely 6.02214076 X [tex]10^{23}[/tex] of the particular chemical elementary entities.
Calculation of amount of MgO
The balanced chemical equation is 2 Mg + [tex]O_{2}[/tex] → 2MgO
It can be seen that 2 mole of Mg reacts with 1 mole of oxygen.
So, 7.8 mole of Mg = 7.8 / 2 = 3.9 mole of [tex]O_{2}[/tex].
Since, [tex]O_{2}[/tex] will be added in given reaction vessel will be 4.7 moles.
So, (4.7 - 3.9) = 0.8 moles of [tex]O_{2}[/tex] left but in this case Mg will be finished. Therefore, Mg will be limiting reagent.
It can be understood that 2 moles of Mg will give 2 mole of MgO.
That's why , 7.8 moles of Mg = 2 × 7.8 / 2 = 7.8 moles of MgO.
Therefore, 7.8 mole of magnesium oxide (MgO) could be generated and Mg will be limiting reagent.
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What characteristics are similar between two biomes
Answers
Answer:
Niches
Explanation:
The diagrams P, Q and R show the atoms in a compound, an element and a mixture,
but not necessarily in that order.Which row of the table correctly identifies P, Q and R?
look at the photo
Answers
Answer:
C.
Explanation:
A mixture contains two or more substances.
A compound contains elements in a fixed ratio.
P = Element
Q = Compound
R = Mixture
The correct order is C.
How much does a 130 kg object weigh on Earth?
Answers
1 kilogram mass exert about 9.8 Newtons of force.
So 130x9.8=1,274 Newtons
A 130 kg object weighs approximately, 1274 Newtons on Earth.
The weight of an object on Earth can be calculated using the formula:
Weight = mass × acceleration due to gravity
Weight is calculated by multiplying the mass of an object by the acceleration due to gravity. On Earth, the acceleration due to gravity is approximately 9.8 meters per second squared (9.8 m/s²).
In this case, we have a 130 kg object. To find its weight on Earth, we can use the formula:
Weight = mass × acceleration due to gravity
Weight = 130 kg × 9.8 m/s²
Weight = 1274 Newtons (N)
So, the weight of a 130 kg object on Earth is approximately 1274 Newtons.
Therefore, a 130 kg object weighs approximately, 1274 Newtons on Earth.
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when a substance like sugar dissolves in water, the particles intermingle. This is possible because the particles of sugar
a)have spaces between them
b)have strong attractions to eachother
c)are pure
d)are vaporized
Answers
Answer:
A
Explanation:
Why do you think the astronomical unit is not used to measure distances on earth?
Answers
Answer:One Astronomical Unit is the distance between the Earth and the Sun, this acts as a sort of a cosmic metre stick. Astronomers don't and cannot measure distances. Distances are merely inferred from what actually has been measured, such as an angle, a relative luminosity, a time period
Explanation:
Answer:
you would have to use decimals in the quadrillionths if you measure in meters. so 11 0s before the number
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Answer:
No. You can not simplify a coefficient of.
Explanation:
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Answers
Answer:
See explanation
Explanation:
1) From the reaction equation;
2 moles of KClO3 yields 2 moles of KCl
Hence,
4 moles of KClO3 yields 4 * 2/2 = 4 moles of KCl
2) Given that from the reaction equation, we have;
Burning 3 * 6.02 * 10^23 molecules of oxygen yields 2 * 22.4 L of CO2
Hence,
7 * 10^25 molecules of oxygen yields 7 * 10^25 * 2 * 22.4 / 3 * 6.02 * 10^23
= 313.6 * 10^25/18.06 * 10^23
= 17.36 * 10^2
= 1736 L
The heaviest element to be created by exothermic nuclear fusion is:
oxygen
carbon
iron
helium
Answers
Answer:
The heaviest element to be created by exothermic nuclear fusion is Iron
Explanation:
Because it is the heaviest element produced during fusion without having to add energy, and it is the lightest element produced during fission without having to add energy. Energy-wise, everything in the universe wants to be iron! Iron is the most abundant element on Earth, making up 34.5 percent of Earth's mass.
What fraction of a sample of ³H will be left after 36.78 years while undergoing beta decay with a half-life of 12.26 years?
Answers
Explanation:
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8. Look at the following electronic configurations of elements and predict which element has the highest electron affinity? Explain your answer. [ /3A]
a. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4
b. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5
c. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6
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shshjshdjajhs
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Answer:
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Explanation:
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Answer:
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3) 3-methyl-2-penten
4) 3-methyl-2-buten
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А
The acceleration determines the total distance traveled,
B
The acceleration determines the change in velocity
С
There is a constant acceleration when an object is moving,
D
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Explanation:
describe a second degree burn
Answers
Answer:
Second-degree burns, or partial thickness burns, are more severe than first-degree burns. They affect the outer layer of skin, called the epidermis, and part of the second layer of skin, called the dermis. Second-degree burns can be very painful and often take several weeks to heal.
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Answer:
20.0 sec
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Explanation:
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Answer:
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Answer:
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Answers
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Answers
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Answer:
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