chromium Metal reacts with phosphoric acid (H3PO4) to make hydrogen gas and chromium (iii) phosphate.  how many moles of chromium are needed to produce 855 g chromium (iii) phosphate according to the reaction above

What energy conversion occurs when a sling shot is used to shoot a rock across the room? (2 points) question 2 options: 1) stored mechanical energy is converted to mechanical energy. 2) stored mechanical energy is converted to radiant energy. 3) gravitational energy is converted to radiant energy. 4) gravitational energy is converted to mechanical energy.