A block is pulled 0.90 m to the right in 4.5 s. What is the block's average speed to the nearest tenth of m/s?
2 answers:
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A 3 isomers are possible for IF3O2 as shown in figure
B In figure 1, the point group is C2V , In figure 2, the point group is Cs, In figure 3, the point group is D3h
C Figure 2 is depending more on repulsive effect as two of the flourine is on plane while another is going inside whereas in figure 1 only two flourine present in close vicinity and figure 3 is least repulsive dependent as the adjacent florine are transverse to each other.
Thus, Figure 2 is depending more on repulsive effect
D For non linear,
Vibrational mode
Thus, 12 Vibrational mode are present.
<h3>Answer:</h3>
Compound A is Ethylbenzene.
<h3>Explanation:</h3>The structure of Ethylbenzene was elucidated and finalized based on following facts:
1) The presence of multiplet signal ranging from δ 7.27 to 7.40 ppm confirms the presence of aromatic protons. Also the statement says that this signal is for 5 protons indicating that the benzene ring is mono substituted.
2) The substituted group on benzene is Ethyl because the quartet for two protons shows that two protons (-CH₂-) are coupled with a CH₃ group. Hence, the ethyl group gives one quartet and one triplet signal.
3) The chemical reaction stated in statement is Nitration reaction. Also, the alkyl group (ethyl) is ortho-para directing in nature. Hence, it will give two products i.e. 1-Ethyl-2-nitrobenzene and 1-Ethyl-4-nitrobenzene respectively.
Attached figure gives the calculated NMR spectrum of Ethylbenzene and the chemical shifts calculated are almost near to the given values. Also, the two products formed are shown.