Cheyanne

how do plants effect Earth's albedo?

the energy change, ΔH, associated with the following reaction is +81.0 kJ.

NBr3(g) + 3 H2O(g) → 3 HOBr(g) + NH3(g)

What is the expected energy change for the reaction of 0.642 moles of NBr3 with 0.938 moles of H2O?

A 0.113 g sample of a gas exerts a pressure of 780 torr in a 50.4 mL container at 23◦C. What is the molar mass of this gas?

The temperature changes by 47.4oC when a half-mole of propellant undergoes complete combustion with excess oxygen in a bomb calorimeter. The large calorimeter has a heat capacity of 6,230 J/oC and contains 3,600 g of water. Calculate the ΔU (in kJ per mole) for the propellant.

the internal energy change is 7kj when an ideal gas expands from 3.50 to 29.2 liters at a constant external pressure of 3.47 atm. what is the heat absorbed by the gas from its surroundings? yahoo

i have a rubbery round lump in my right breast. it is movable does doesn't hurt. i found it when i was 17 and i am 18 now. i don't think it is cancerous but i am terrified that i will more than likely have to get a biopsy when i go to the doctor soon. i am extremely scared of needles and they make me freak out and hyperventilate. is there any way to help ease my anxiety for this procedure?