Un globo meteorológico se llena con 15.0 L de helio a una temperatura de 25°C y una presión de 685 torr. ¿Cuál es la presión del helio en el globo en la atmosfera superior cuando la temperatura es -35°C y el volumen se vuelve 34000 mL?

Agas mixture with a total pressure of 745 mmhg contains each of the following gases at the indicated partial pressures: co2, 245 mmhg ; ar, 119 mmhg ; and o2, 163 mmhg . the mixture also contains helium gas. part a what is the partial pressure of the helium gas? phe p h e = nothing mmhg request answer part b what mass of helium gas is present in a 10.2-l sample of this mixture at 283 k ? m m = nothing g request answer

If 34.2 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 299 kelvin and 1.21 atmospheres? 2 li (s) + 2 h2o (l) yields 2 lioh (aq) + h2 (g)

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?