Which of the following statements is true? Sound waves create areas of high and low pressure, Areas of high pressure are called compressions. Areas of low pressure are called rarefactions. All of the above. .

You may expect bonds between two atoms which each have n covalent lonic metallic hydrogen

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

Classify this reaction: 2al+n2-> aln.