PLEASE HELP Before the fire, the forest consists of large trees. After the fire, there is only ash. Explain what the law of conservation of matter suggests happened to the rest of the mass of the trees.

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

When the water vapor cools it condenses select a number that represents his process on the

What effect might melting sea ice have for people who live in coastal areas?