Which is the best conductor of heat in aluinium, brass, iron, copper

What are several ways to reduce the effect of friction

Which of the following elements is most likely to have an oxidation state of +2? a. oxygen (0) b. sodium (na) c. chlorine (ci) d. strontium (si)

Carbons 1 and 4 of 1,3−cyclopentadiene are equivalent and give the same carbocation on protonation. likewise, carbons 2 and 3 are equivalent. write the structure of the carbocation formed by protonation of c−2 or c−3 to verify that it is not allylic and therefore not as stable as the one formed by protonation of c−1 or c−4.