Are all lenses planer?

Which best describes how johannes kepler developed his laws of planetary motion

Consider the following reaction at equilibrium. 2co2 (g) 2co (g) + o2 (g) h° = -514 kj le châtelier's principle predicts that the equilibrium partial pressure of co (g) can be maximized by carrying out the reaction a. at high temperature and high pressure b. at high temperature and low pressure c. at low temperature and low pressure d. at low temperature and high pressure e. in the presence of solid carbon

Asubstance is a good conductor of electricity which of the following best explains a probable position of the substance in a periodic table