3. What is the density of a 100 grams (g) box that displaces 20 mL of water?

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

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

Is 9 correct? and can someone me with 10? it’s due tomorrow, you