How many oxygen (O) atoms are involved in this chemical reaction?

2Fe(OH)3 — Fe2O3 + 3H20

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

To find the work done, the force exerted and distance moved are multiplied. a couch is moved twice before you are happy with its placement. the same force was used to move the couch both times. if more work is done the first time it is moved, what do you know about the distance it was moved? a) when more work was done, the couch was moved the same distance. b) when more work was done, the couch was moved less. c) when more work was done, the couch was moved further. d) when more work was done, the couch wasn't moved at all.

Can anyone answer these questions? ? i need it before 1: 00pm today