Cesium- 137 has a half life of 30 years. If it disintegrates over a period of 90 years, how much (%) remains? How much (%) decayed

Earth's axis of rotation is tilted at an angle of 23.5 degrees. what is one change you would see on earth if its axis was not tilted?

1. true or false: minerals are inorganic. true false 2. inorganic means that something has never been found alive 3. halite is another name for and is a mineral with a cubic crystal pattern. table salt rock salt

What is the reaction between an acid and a base