The reaction between zinc (zn) and hydrogen chloride (hcl) produces zinc chloride (zncl), hydrogen (h2) gas, and heat. if more heat is removed from the reaction, how does the rate of reaction change to counter the action? zn + 2hcl ⇌ zncl2 + h2 + heat the rate of the and produces more blank 1. reverse reaction decreases forward reaction decreases forward reaction increases blank 2. hydrogen chloride zinc zinc chloride

Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.

What would be the original temperature of a gas that has a volume of 2.0 l and a pressure of 2.0 atm and an unknown temperature that the volume increased to 3.5 l in its pressure decreased to 1.0 atm if the final temperature is measured to be 11°c