Solve for the unknown by showing your work. 1) Find the volume of 28 g CO2 at STP?

2) Using your answer in #1, determine the density of carbon dioxide.

3) In the combustion reaction of methane gas : CH4 (g) + O2 (g) --> CO2 (g) + 2 H2O (g)

4.0 X 10 exp 23 molecules of CH4 was used. Determine

(a) the moles of CO2 produced

(b) using your answer in (a), calculate the volume of CO2 produced at STP

(c) the volume of oxygen used in the reaction at STP

The ozone molecule o3 has a permanent dipole moment of 1.8×10−30 cm. although the molecule is very slightly bent-which is why it has a dipole moment-it can be modeled as a uniform rod of length 2.5×10−10 m with the dipole moment perpendicular to the axis of the rod. suppose an ozone molecule is in a 8000 n/c uniform electric field. in equilibrium, the dipole moment is aligned with the electric field. but if the molecule is rotated by a small angle and released, it will oscillate back and forth in simple harmonic motion.what is the frequency f of oscillation?