How many moles are in 4,55 X 10^23 molecules of CO2 (rounded)

In this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced?

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

Determine the empirical formula for succinic acid that is composed of 40.60% carbon, 5.18% hydrogen, and 54.22% oxygen.