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Related Questions
When a polar bond is formed between 2 atoms which atom receives a partial positive charge
Balance the following redox reaction occurring in an acidic solution. The coefficient of Mn2+(aq) is given. Enter the coefficients (integers) into the cells before each substance below the equation. ___ AsO2−(aq) + 3 Mn2+(aq) + ___ H2O(l) \rightarrow→ ___ As(s) + ___ MnO4−(aq) + ___ H+(aq)
Gasline is solid by the liter in many countries. How many liters are required to fill a 12.0-gal gas tank?
What pressure is exerted on the bottom of a 0.500-m-wide by 0.900-m-long gas tank that can hold 50.0 kg of gasoline by the weight of the gasoline in it when it is full?
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Answer:
Product A and B : (2R,3S)-2,3-diethyloxirane and (2S,3R)-2,3-diethyloxirane.
Explanation:
A double bond is converted to an oxirane through oxidation by peracids e.g. mCPBA (meta-chloroperoxybenzoic acid).
Epoxidation can occur at both face of double bond result in formation of two stereoisomers.
Product A and B : (2R,3S)-2,3-diethyloxirane and (2S,3R)-2,3-diethyloxirane
Both A and B contain plane of symmetry. Hence, both the products are achiral. So, they do not rotate the plane of polarization of plane polarized light.
Decomposition
Combustion
Single Replacement
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Answer:
Decomposition= one-reactant
Combustion= 2-reactants
Single displacement= 2-reactant
Explanation:
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The wavelength of the green light radiation that has a frequency of 6.26 x 10¹⁴ Hz is 4.8 x 10⁻⁷.
What is wavelength?
Wavelength is defined as the distance between identical points or adjacent crests in the adjacent cycles of a waveform signal propagated in the space or wires.
Frequency is defined as the number of waves that passes a fixed place in a given amount of time.
It is also defined as how often something repeats.
As, c = ∧ v
So, ∧ = c / v
∧ = 3.00 x 10⁸ / 6.26 x 10¹⁴
∧ = 4.8 x 10⁻⁷
Thus, the wavelength of the green light radiation that has a frequency of 6.26 x 10¹⁴ Hz is 4.8 x 10⁻⁷.
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So,
λ=(3.00 x 10^8)/(6.26 x 10^14)
Answer= 0.48 x 10^-7
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Answer :
(a) The repeat unit is, styrene
(b) The number-average molecular weight is, 2392000 g/mol
Explanation :
First we have to calculate the repeat unit molecular weight of polystyrene.
As, the repeat unit is, styrene having chemical formula
Molecular weight of repeat unit = 8 × C + 8 × H
Molecular weight of repeat unit = 8 × 12 g/mol + 8 × 1 g/mol
Molecular weight of repeat unit = 104 g/mol
Now we have to calculate the number-average molecular weight.
Number-average molecular weight = Average repeat molecular weight × Degree of polymerization
Number-average molecular weight = (104 g/mol) × (23000)
Number-average molecular weight = 2392000 g/mol
Thus, the number-average molecular weight is, 2392000 g/mol
Final answer:
The repeat unit molecular weight of polystyrene is 104.15 g/mol. The average molecular weight of polystyrene with a polymerization degree of 23000 is approximately 2,395,450 g/mol.
Explanation:
To answer this question, we first need to understand that the repeating unit in polystyrene is the styrene monomer, which is C8H8. The molecular weight of this unit can be calculated by adding up the atomic weights of all the atoms in the monomer. The atomic weights of carbon (C), hydrogen (H), and styrene-based on the periodic table are approximately 12.01 amu, 1.01 amu, and 104.15 g/mol respectively. This gives a total of 104.15 g/mol for the repeat unit molecular weight of polystyrene.
Given that the degree of polymerization is 23000, we can calculate the number-average molecular weight by multiplying the repeat unit molecular weight (104.15 g/mol) by the degree of polymerization (23000). This gives a total of approximately 2,395,450 g/mol for the number-average molecular weight.
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Answer:
cilia and flagella
Explanation:
In prokaryotic species , cilia are present , and in eukaryotic species , flagella is present .
Cilia and flagella both have same function , i.e. , to enable the movement of the cell , along with the movement of some substance and direct the flow of these substance along the tracts.
Cilia and flagella are composed of basal bodies.
Hence , from the given statement of the question,
The correct term is cilia and flagella .
Final answer:
Cilia are the structures that help move substances across the surface of a tract. They are primarily found in certain types of cells such as those in the respiratory tract and the oviducts.
Explanation:
The structures that assist in moving substances across a tract surface are primarily called cilia. In biology, cilia are tiny hair-like structures that line certain types of cells, especially those in the respiratory tract and the oviducts. They work much like oars on a boat, moving in coordinated waves to propel substances (like mucus or egg cells) along the surface of the tract they occupy. They are responsible in movement of substances across tract.
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The reform reaction between steam and gaseous methane (CH4) produces "synthesis gas," a mixture of carbon monoxide gas and dihydrogen gas. Synthesis gas is one of the most widely used industrial chemicals, and is the major industrial source of hydrogen.
Suppose a chemical engineer studying a new catalyst for the reform reaction finds that 924 liters per second of methane are consumed when the reaction is run at 261°C and 0.96atm. Calculate the rate at which dihydrogen is being produced. Give your answer in kilograms per second. Round your answer to 2 significant digits.
Answer: The rate at which dihydrogen is being produced is 0.12 kg/sec
Explanation:
The balanced chemical equation is ;
According to ideal gas equation:
P = pressure of gas = 0.96 atm
V = Volume of gas = 924 L
n = number of moles
R = gas constant =
T =temperature =
According to stoichiometry:
1 mole of methane produces = 3 moles of hydrogen
Thus 20.2 moles of methane produces = moles of hydrogen
Mass of hydrogen =
Thus the rate at which dihydrogen is being produced is 0.12 kg/sec