A bowl containing 70 grams of water, is heated from 10 °C to 90 °C. The specific heat of water is 4.184 J/gºC. How much heat energy is required to heat the water?

An aqueous solution of potassium hydroxide is standardized by titration with a 0.194 m solution of hydrobromic acid. if 25.2 ml of base are required to neutralize 24.2 ml of the acid, what is the molarity of the potassium hydroxide solution? m potassium hydroxide

Which of these would be caused by a chemical change? a) the formation of lava. b) sedimantary rock layering over time. c) metamorphic rock forming from igneous. d) metamorphic rock eroding to form sedimentary rock.

Which of these conditions most likely produces an unstable isotope?