Graphene and methane are both made from C's and H's. Why is methane is an insulator, while graphene is a conductor?
Graphene and methane are both made from C's and H's. Why is methane is an insulator,...
Diamond and graphite are both made of carbon. Diamond is an electrical insulator, is the hardest material in the word and is often used as a cutting tool. In drastic contrast, graphite is an excellent electrical conductor, is easy to be cut and is often used as a lubricant at high-temperature mechanical environments. You have learnt the covalent bond, the van der Waals bond and the hexagonal carbon ring. Please explain why the properties of diamond and graphite are so...
F For both: List absorbances and assignments; show structure with C's and H's labeled. For 'H NMR list multiplicty, intergration, assignment The compound is phenyl salicylate. Thank you! %Transmittance 3689.29 8 3231.29 3058.12 2985.67 2763.41 2684.92 2620.01 2535.08 2409.91 2305.12 2196.32 2134.30 N1740.72 1692.51 1615.84 1583.59 1493.87 2032.86 1995.12 1961.43 1938.41 4 1876.22 1814.74 1784 98- 1483.67 41466 133 1321 8 1302.3 1265.93 1398.59 1248.99 1158.03 1128.67 916.32 1024.90 1008.84 1001.25 1188.85L 1068.91 1033.15 954.93 896.06 736.15 98 22 62796...
E(k)t Er K. 4. (Advanced Level) Graphene is a special type of material which is two- dimensional and has a linear E-k diagram. The conduction and valence bands touch each other at a singularity, known as the Dirac point. In the unexcited state, the valence band is completely filled, while the conduction band is completely empty From the E-k diagram shown above, deduce the equation of the E-k curve. Hence, from the equation you deduced, speculate the special properties of...
both please Carbon tetrachloride can be promed by reacting chlorine with methane : ICHq + 2Cl2 -> CCl4 t 2 H₂ Given that the heat of formation of methane is - 24.85k] Imol and the heat of porination of carbon tetrachloride is - 135k3 /mol, determine the standard enthaalpy of formation poi the reaction Why are there not values For the heat og og pormation of Cl2 and H₂ ? Is this ieaction endothermic or lexothermic ? How do you...
From the equipartition theorem detail how many 1/2RT contributions are made to the internal energy. Why do some motions receive full contribution while others don't?
Why do we need phonology (i.e. why are words made up from a small inventory of phonemes)? Why aren't whole words just treated as different sounds.
From an examination of the structure of the a-helix, why is it impossible to have both L- and D- amino acids in the same polypeptide?
ONLY ANSWER QUESTION B, C (both c's), F (identifying i, ii, iii) & G. THANK YOU! dud Jackson has a utility of money function given by U()- y. a) Is Jackson risk averse, risk neutral, or a risk lover? How do you know this? All of Jackson's wealth is in his land and his house; the total value is $1,000,000. With probability 0.4, the house will burn down, and Jackson's remaining wealth will be only the value of the land,...
Consider two simple pendula, A and B, made from a mass at the end of a massless inextensible string. The string of pendulum A has a length of LA= 1 m, while the length of the string of pendulum B is unknown. Both pendula are released at the same time. After pendulum A has completed 12 complete oscillations, pendulum B has completed 10. What is the length of the string on pendulum B?
How many unique dipeptides could be made from two different amino acids? Both amino acids do not have to be used in each dipeptide.