Asubstance made up of a combination of two or more elements held together by chemical bonds that can not be separated by physical means

In this synthesis reaction what products will form

Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution? a. 3.88 m, b. 1.03 m, c. 1.5 m, d. 15.5 m

What is the relation between concentration of reactants and the rate of chemical reaction?