Explain why it is always necessary to balance a chemical equation. be sure to discuss atoms, bonds, and the law of conservation of mass

All chemical reactions follow the law of conservation of mass. This means that the number of atoms of a specie before the reaction must equal to the number of atoms of that specie after that reaction. The only change that occurs in chemical reactions is the breaking and formation of chemical bonds, due to which energy may be released or absorbed.

Molarity = moles of solute/volume of solution in liters.

Our solute here is sulfuric acid, of which we have 49.0 g. The number of moles of sulfuric acid is (49.0 g)/(98.079 g/mol) = 0.4996 mol H2SO4. To obtain the molarity of this solution of sulfuric acid, we divide 0.4996 mol H2SO4 by 3.00 L, which gives us 0.167 M H2SO4 (answer given to three sig figs).