100 point s the approximate composition of the atmosphere is shown in the pie-chart. which statement best describes the chart? a) the chart shows the percentages of elements in a mixture. b) the chart shows the percentages of elements in a compound. c) the chart shows the percentages of pure substances in a mixture. d) the chart shows the percentages of compounds in a pure substance.

What is the ph of a 0.0010 m hno3? 1.0 3.0 4.0 5.0

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?

Draw the lewis dot structure for each of the following polyatomic ions