A sample of an unknown compound of set composition is decomposed into its elements what is the mass of each element recovered? 2. 2.876 gram sample with 66.7% carbon, 4.06% nitrogen and 23.16% oxygen.

Which best describes how johannes kepler developed his laws of planetary motion

Suppose you wanted to make 100 grams of water. what is the molar mass of water (h2o)?

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?