B. Use Hess's law and the following equations to calculate the ΔHreaction for the reaction C3H8(g) + 5O2(g) --> 3CO2 (g) + 4H2O(l). Show your work. 3C(s) + 4H2 (g) --> C3 H8 (g) ΔH = –103.85 kJ/mol
C(s) + O2 (g) --> CO2 (g) ΔH = –395.5 kJ/mol
2H2 (g) + O2 (g) 2H2O(l) ΔH = –571.66 kJ/mol

At 300 mm hg, a gas has a volume of 380 l, what is the volume at standard pressure

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.

How does the atmosphere to make earth livable? check all that apply. causes the seasons contains oxygen provides warmth creates important nutrients blocks harmful energy from the sun plz like !