Many power plants produce energy by burning carbon‑based fuels, which also produces carbon dioxide. carbon dioxide is a greenhouse gas, so over‑production can have negative effects on the environment. use enthalpy of formation data to calculate the number of moles of produced per megajoule of heat released from the combustion of each fuel under standard conditions (1 atm and 25 °c).

answer: i dont know the answer but this might

explanation:

l

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.

(b) which contains higher levels of vitamin b, oranges or spinach?

explanation:

you can eliminate a, c, and d because they are questions based on opinions.