iron (III) oxide is formed when Iron combines with oxygen gas. how many grams of iron (III) oxide are formed when 16.7 g of iron metal reacts with excess oxygen gas? (show work)​

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false