Please help convert 2.09 x 10^23 formula units of CaCl2 to moles. Include the correct number of dig figs.

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al

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)

The biosphere of the earth is made up of what compound? organic or inorganic?