Which of the following is a chemical change ?
boiling of water
melting a cube of ice
dissolving 10 grams of salt in water
splitting water into hydrogen and oxygen

What is the overall order of reaction for rate = k[no2]2 ? second order 3/2 order third order zero order none of the listed answers are correct

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

1. explain hydrogen peroxide, h 2 o 2 properties and decomposition reaction. 2. describe how each of the following natural cycles plays a part in earth’s climate system. (a) the water cycle (b) the carbon cycle