How many moles of cesium (cs) atoms are in 675g cs?

How many moles of oxygen react with 12 moles of aluminum

Areaction in which products can react to re-form reactants is

Polar bears give birth and hunt on sea ice. which of the following would polar bears survive during the melting of arctic ice? growing another layer of fur during summer migrate inland to search for different food sources staying put until the ice refreezes sticking to the usual diet of seals