Answer the following questions for the balanced reaction.

CO2 (g) + 2H2O(l) --> CH4 (g) + 2O2 (g) ΔHrxn= +213 kcal

If 341 kcal of energy was consumed what mass of CO2 was used?

Answer the following questions for the balanced reaction.

CO2 (g) + 2H2O(l) --> CH4 (g) + 2O2 (g) ΔHrxn= +213 kcal

If 54.65 g CH4 is produced what amount of energy was used?

Answer the following questions for the balanced reaction.

CO2 (g) + 2H2O(l) --> CH4 (g) + 2O2 (g) ΔHrxn= +213 kcal

If 306 kcal of energy was consumed what mass of H2O was used?

- To begin a 0.230g sample of Argon (Ar) gas is at 25.0ᵒC in a 0.253 L tank.

- The gas is then heated and the temp increased until the pressure inside rises to 1.55 atm.

Given the specific heat of Argon is SAr = 0.124 cal/gᵒC find the energy (cal) that went into the gas.

If 1.2g of 100.0C steam begins to condense on a container of liquid water at 25.0C and they eventually reach the same temperature of 46.7C what was the mass of liquid water in the container?

*Assume all heat from the steam cooling goes into the liquid water.*

If an 3.6 g piece of water ice at -15C has 560 calories (enough to liquefy it) added to it what would end temperature be?

I have done these problems 6 times and gotten them all wrong and I really do not understand how to do them. My assignment is due at 11:59 pm tonight

and i need help with this study guide!

please please help if you can