One way to change iron ore, Fe2O3, into metallic iron is to heat it together with hydrogen. Fe2O3 + H2 > Fe + H2O How many moles of iron are made from 25 moles of Fe2O3? How many moles of hydrogen are needed to make 30 moles of Fe?

Modern weaponry has increased the number of deaths in wars and violent conflicts.

6. using 3 – 4 sentences explain (in your own words) why water expands when it freezes? 7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation.

Which statement explains why the bonds between non metals tend to be covalent? the bonds are found to be nondirectional they have large differences in electronegativity they have small differences in electronegativity they have ions that produce an electrostatic pull