A sample of an oxide of arsenic is found to contain 75.74% arsenic. What is its empirical formula?

Given sno2 + 2h2 - sn + 2h20 tin oxide reacts with hydrogen to produce tin and water. how many moles of sno2 are needed to produce 500.0 grams of sn?

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.

Which reason best explains why metals are malleable? a)because they have delocalized electrons b)because they have localized electrons c)because they have ionic bonds d)because they have rigid bonds