What is the connection between the number of electron clouds and the electron geometry?

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

What metric units would you use to measure the thickness of a key

Each of the following reactions is allowed to come to equilibrium and then the volume is changed as indicated. predict the effect (shift right, shift left, or no effect) of the indicated volume change. drag the appropriate items to their respective bins.co(g) + h2o(g) < => co2(g) + h2(g) (volume is decreased) pcl3(g) + cl2(g) < => pcl5(g) (volume is increased) caco3(s)< => cao(s) + co2(g) (volume is increased)