Use the information from the diagram to calculate the enthalpy of combustion for methane. Question 2 options:

A)

+752 kJ

B)

–921 kJ

C)

–604 kJ

D)

+604 kJ

what is the volume occupied by 40 grams of argon gas (ar) at standard conditions? what volume, in liters, is occupied by 1.5 x 1023 

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

i'm assuming that the correct answer is indeed the first one/ "a"..

the link still does not work even when adding it to the url bar

explanation: