Arrange the 0.10 M solutions of the following compounds in order of decreasing acidity (most acidic first). I. CH3NH3Br
II. KC2H3O2
III. Ca(C2H3O2)2
IV. CH3COOH
V. CCl3COOH
VI. NaOH

Which statement describes the appearance of a temperature-vs.-time graph? a horizontal line shows that the temperature increases at a constant rate over time. a vertical line shows that the temperature decreases at a constant rate over time. horizontal lines where the temperature is constant during phase changes connect upward-sloping lines where the temperature increases. horizontal lines where the temperature increases are connected by upward-sloping lines where the temperature is constant for each phase.

Which statement describes how phase changes can be diagrammed as a substance is heated? the phase is on the y-axis and the temperature is on the x-axis. the temperature is on the y-axis and the phase is on the x-axis. the time is on the y-axis and the temperature is on the x-axis. the temperature is on the y-axis and the time is on the x-axis.

Express the following number in scientific notation. 0.026890 =