How many liters of ch4(g), measured at 22.6 ∘c and 768 mmhg , must be burned to provide the heat needed to vaporize 3.82 l of water at 100 ∘c? δcombh=−8.90×102kjmol−1 ch4. for h2o(l) at 100 ∘c, d=0.958gcm−3 and δvaph=40.7kjmol−1.
express your answer in liters to three significant figures.

The grooves or folds of the brain are called

Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.

If the concentration of phosphate in the cytosol is 2.0 mm and the concentration of phosphate in the surrounding fluid is 0.1 mm, how could the cell increase the concentration of phosphate in the cytosol? a) passive transportb) diffusionc) active transportd) osmosise) facilitated diffusion