What does it mean that flame is non-luminous it is yellow it is invisible It has a very bright blue inner cone it is dark what will be in the crucible during the first heating? nothing magnesium water magnesium oxide When will you be weighing an empty crucible and lid? Owe do not weigh empty crucible at the very beginning after adding water after the first heating Why are 10 drops of water added to crucible? O to make the product easier to handle Oto rinse the lid Oto cool the crucible to convert a by-product to magnesium oxide Sample of unknown compound was found to contain 6.5g of X and 5.3 g of O. Using molar masses, this amounts to 0.17 mol of X and 0.33 mol of O. The most likely formula of the compound is X0 X03