A certain mass of nitrogen gas is added to a vessel of 405 mL containing 0.52 g oxygen. The gas pressure is increased from 745 mmHg to 980 mmHg. Assuming the temperature remains
constant and that the nitrogen gas does not react with oxygen gas, calculate the mass of
added nitrogen.

What is the empirical formula of vanadium 1 oxide given that 20.38 grams of vandium combines with oxygen to form 23.58 grams of the oxide

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

Ok, so i have 2 questions. try to answer them both: (the topic is fire) 1) how can you represent the chemical reaction of fire? 2) what kind of bond is formed in this chemical reaction