Use the standard heats of formation provided to choose the choice that show the valid math statement and math claim to calculate the standard heat of reaction for the reaction between hydrogen gas and oxygen gas shown. 2H2 (g) + O2 (g) → 2H2O (l)

Substance ΔH°f (kJ/mol)
H2 (g) 0
O2 (g) 0
H20 (l) -285.8
A)(0-0) - (-285) = 285 kJ/mol
B)0 - (-285-0) = -285 kJ/mol
C)-285 - (0-0) = -285 kJ/mol
D)(-285-0) - (0) = 285 kJ/mol

when atmosphere interacts with biosphere they focuses on on the sources and sinks of green house gases (ghgs) air pollutants, particular matters, water and energy between the earth's surface and the atmosphere. the biosphere affects the climate. the atmosphere and biosphere are in constant interaction with each other, and all living things rely on gases in the atmosphere for life. organisms such as animals take in oxygen gas form the atmosphere to use in every cell of their body for smooth functioning of daily routine exercises.

the correct answer is:

a. formation of precipitation