6. Which pair of substances produce a precipitate when their aqueous solution are mixed? A) barium nitrate, silver nitrate
B) sodium chloride, barium nitrate
C) sodium nitrate, barium chloride
D) sodium sulphate, barium chloride

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.

How many grams of n2h4 will be consumed by 23 g of n2o4

Water (2510 g ) is heated until it just begins to boil. if the water absorbs 5.09×105 j of heat in the process, what was the initial temperature of the water?