When are elements heavier than iron formed by stars?(1 point) 1. in small, old stars
2. as a dying star explodes
3. as a star is first formed
4. in young stars

4nh3+5o2--> 4no+6h20what is the total number of moles of h2o produced when 12 mole of nh3 is completely consumed?

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

Draw metallic bonding if two copper