The mole fraction of carbon dioxide in a gas mixture is .200 there are also .251 g of nitrogen and .322 g of oxygen in this gas mixture what is the mass of arbon dioxide in this mixture

Calculate the h3o+ concentration in a solution of acetic acid if the concentration of molecular acetic acid present at equilibrium is 9.97x10^-3 m and k for the dissociation is 1.86x10^-5. ch3cooh(aq)+h2o(> h3o^+(aq)+ch3coo^-(aq)

1) these are barrel shaped microtubules in most animal cells, that organize the spindles during cell division

Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.