In the reaction 2H2+O2→2H2O, how many moles of hydrogen are required to fully react with 8 mol of oxygen?

List four observations that indicate that a chemical reaction may be taking place

Acompound contains c, h, and o atoms. when 1.130 g of the compound is burned in oxygen, 1.064 g co2 and 0.3631 g h2o are produced. what is the empirical formula of this compound?

What are transitions between a liquid and a solid called? identify which way they are transitioning