Most planets have but none has a like earth does. a. a biosphere; hydrosphere., b. an atmosphere; cryosphere., c. an atmosphere; hydrosphere., d. a hydrosphere; lithosphere

In a popular classroom demonstration, solid sodium is added to liquid water and reacts to produce hydrogen gas and aqueous sodium hydroxide. part a write a balanced chemical equation for this reaction. express your answer as a chemical equation. identify all of the phases in your answer.

How far is the region from the equator or control climate

11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg