If a reaction starts out with 15 grams of iron and 5 grams of oxygen gas, how much iron oxide will be produced according to the Law of Conservation of Mass? 2 points
10 grams
15 grams
20 grams
75 grams

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

Why is silver chloride is an ionic compound

Name the element in group 17, period 2. (periodic table)