When 102.4 grams of sodium produces calcium by reacting with calcuim iodide the reaction also produces sodium iodide. How many atoms of calcium will be formed?

Ineed with my science work! it’s due tomorrow!

Calculate - analysis of compound composed of iron and oxygen yields 174.86 of fe and 75.14g of o. what is the empirical formula for this compound?

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