Answer:
The balanced chemical equation is,
4 Fe + 3 O₂ → 2 Fe₂O₃
Drag four iron atoms and 3 oxygen molecules and place it on the left plate.
And drag 2 molecules of ferric oxide and place it on the right plate.
Answer: C. Z is an intermediate.
Explanation: The given reaction is
And the rate equation is rate = k [X_2][Y]
From this, we can imply that either the concentration of Z is very small in comparison tot he other reactants or the reactant Z is an intermediate which is available only for the given small amount of time.
There can be various steps in the mechanism for the proposed reaction and Z can also react in any of the steps. It is not necessary that it should react in a step other than the rate determining step.
This might be possible that the activation energy for Z to react is very low But since it has made a new kind of product that is XZ, then the former cannot be true.
Answer:
Group 18 elements
Noble gases
Explanation:
The gases in the last group of the periodic table exist in nature in uncombined state. Due to their nature of passiveness, they are called inert gases.
Other names include the noble gases. They are as follows
Helium
Neon
Argon
Radon
Xenon
These elements occur in as mono atomic atoms. Hence, they have an atomicity of 1
Answer:
Eght: 0
Explanation:
The work formula is W = F*d where d is displacement (which means the direction matters)
Same amount of work.
Eight
Time does not matter in Work. Force and Distance do.
F = 50 N
s = 0 The only work you have done is move the ball above your head. Thereafter you just held it.
t = 15 but no work is done. Tell your tired muscles that as they try and deal with holding a 5 kg mass above you head.
W = 0
Nine
Again from the last question you should be able to tell that time does not matter. The force is the same for both of you (that's why he's your identical twin).
So the work is the same. You both weigh the same. You both went the same distance.
8
Answer:
spring summer fall(autumn) winter
Explanation
spring runs from March 1 to May 31; summer runs from June 1 to August 31; fall (autumn) runs from September 1 to November 30; and. winter runs from December 1 to February 28 (February 29 in a leap year).
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