If 2.50 grams of the metal Barium are warmed in the presence of a large amount of Nitrogen gas, 2.67 of the compound Barium Nitride will form from the two elements. Find the empirical formula of barium nitride.

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.

An alcohol thermometer makes use of alcohol's changing in order to measure temperature. as the temperature goes up, the alcohol contained in the thermometer increases in volume, filling more of the thermometer's tube.

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer