20. The average atomic mass is a weighted average that reflects the natural percent of the all the isotopes of that element found in the universe.

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.

Determine the percent sulfuric acid by mass of a 1.61 m aqueous solution of h2so4. %

Which step in naming unsaturated hydrocarbons is used for alkenes but not alkynes