Agas mixture contains 1.61 moles of hydrogen and 2.31 moles of oxygen. what is the mole fraction of oxygen?

a) 0.41
b) 0.59
c) 2.31
d) 3.92

Why should the scientific method be used to answer a question? a. it provides a way to test an idea without any bias. b. it provides a way to test a hypothesis. c. it provides a way to ensure all hypotheses are proven correct. d. it provides a way to quickly turn a hypothesis into a scientific theory.

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)

In the space, show a correct numerical setup for calculating the number of moles of co2 present in 11 grams of co2