The following Lewis structures represent valid resonance forms. true or false
Answers
The given Lewis structure does not show valid resonance form. So,the given statement is false.
What is Lewis structure?
The Lewis structure is the representation of the of valence shell in the molecule.
What is valence electron?
The electron present in outermost shell and which involve in chemical bond formation is called valence electron.
What is resonance structure?
Resonance is way to explain the localisation of electron in molecule where Lewis formula fails to describe.
The given statement is false because both structure shows different number of valence electron.
To learn more about Lewis structure here.
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Answer:
true
Explanation:
because Lewis represent valid resonance
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Why the radius of an atom cannot be determined precisely ?
They all transfer energy.
B.
They are all electromagnetic waves.
C.
They all require a medium to travel.
D.
They are all mechanical waves.
Answers
Answers
Describe how the catalyst, zymase speeds up the reaction shown
The catalyst zymase speeds up the reaction by catalyzing the fermentation of sugar into ethanol and carbon dioxide. It is mostly present in yeasts.
b. energy input
c. equilibrium
d. exchange reaction
Answers
since you need to release a certain amount of energy to hit the activation point.
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(a) Balance the above redox reaction.
(b) Determine the concentration of H2O2 solution in molarity if 10.00 mL of this solution requires 20.00 mL of 1.5 M MnO4− for a complete reaction.
Answers
Answer:
A)
B) 7.5 molar
Explanation:
A)Reduction
Oxidation
Multiplying the oxidation reaction by 5/2 and adding it to the reduction equation:
+
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B) 10 ml = 0.01 L
20 ml = 0.02 L
mol of MnO4− = molarity*volume = 1.5*0.02 = 0.03
1 mol of MnO4− reacts with 5/2 mol of H2O2, then:
mol of H2O2 = 0.03*5/2 = 0.075
molarity = mol/volume = 0.075/0.01 = 7.5 molar
Answers
Answer:
They are composed by two or more pure substances.
Explanation:
Hello,
At first, we must take into account that mixtures are such materials made up of two or mire pure substances, say elements, molecules or compounds. They are classified as homogeneous for which there is no appreciable difference upon its constituents and as heterogeneous for which the constituents are differentiable. Now, stainless steel is considered as a mixture as long as it is mainly composed by iron and carbon and some other metallic elements such as chromium. Sea water is another interesting example, since the main constituents are water and sodium chloride, nonetheless, other ions such as iodide, sulfate, magnesium (II), potassium (I), calcium (II) are also found into it. Finally, the air is a mixture due to the presence of oxygen and nitrogen as the major constituents, considering others such as carbon dioxide, methane (pollution), argon, hydrogen as traces, it means, compositions below the 1%.
Best regards.
Think of a homogeneous mixture similar to salt water. Homogeneous mixtures have a fixed, or uniform composition. This means that each part of the mixture has the same properties. Every part of the sample is identical to the next. The same thing would happen with steel and bronze, they too are uniform throughout.