xA balloon is filled to a volume of 1.50 L with 3.00 moles of gas at 25.0 °C. With pressure and temperature held constant, what will be the volume (in L) of the balloon if 0.90 moles of gas are added?

Nitric oxide (no) can be formed from nitrogen, hydrogen and oxygen in two steps. in the first step, nitrogen and hydrogen react to form ammonia: n2(g) + 2 h_2(g) rightarrow 2 nh_3 (g) delta h = -92. kj in the second step, ammonia and oxygen react to form nitric oxide and water: 4 nh_3(g) + 5 o_2(g) rightarrow 4no(g) + 6 h_2o(g) delta h = -905. kj calculate the net change in enthalpy for the formation of one mole of nitric oxide from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false

Convert the temperature of dry ice, –77 ∞c, into degrees fahrenheit and kelvin.