g As stated in the procedure, gas evolution may occur when the sodium bicarbonate (NaHCO3) solution is added in the experimental procedure. State the purpose of adding the sodium bicarbonate, provide a balanced chemical equation for the reaction that may occur, and identify the gas evolved.

The answers is a nuclear changes

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).

Silicon  6.0x10^23 is avogadro's number so the answer has to be 1 mole of whatever it is. since the molarity of silicon is equal to 28g/mol, this has to be the answer because 28g of si is 1 mole of si.