Hydrogenation of double and triple bonds is an important industrial process. Calculate (in kJ) the standard enthalpy change ΔH for the hydrogenation of ethyne (acetylene) to ethane: H−C≡C−H(g)+H2→H3C−CH3(g)
Bond enthalpies (in kJ/mol):

C−C (342)

C≡C (818.4)

C−H (403.4)

H−H (433.7)

Monkeys and bats have similar bone structure in their forelimbs. however, monkeys have longer forelimbs to use for climbing and swinging in trees. bats have shorter forelimbs to use for flight. which term best describes how monkey and bat forelimbs are related to each other? a. homologous b. embryonic c. analogous d. vestigial

What is the value of keq for the reaction expressed in scientific notation

What is the relationship of air masses and the temperature of oceans?