A) 'the coefficient of sodium aulfate is one. 8) Barium sulfate is produced in eolid form C) Burium chloride is digsolved in water. D) ' 2NaCl(aq) could also be cotrectlite and wodium chioride, 100. Consider the reaction show cotrectly written an Na2Cl2 (aq). CaCO3(s)825CCaO(B)+CO(B) A) 't his reaction is balanced as written. B) The reactant must be heated for this reaction to occur. D) Water must be present for this reaction to occur. 8) 'There are no solutions used in this reaction 101. 'The scientific principle which is the basis for balancing chemical equations is A) the l aw of Conservation of Finergy. B) the ll aw of Conservation of Mass, D) Ave llaw of Definite lProportions. 102. Which statement regarding balanced chemical equations is iond true? A) The number of each kind of atoms must be the same on each side. B) Coefficients are used in firont of formulas to balance the equation. C) Subscripts may be changed to make an equation simpler to balance. D) When no coefficient is writiten in front of a formula, the number "one" is assumed. B) Reactants are written to the left of the arrow 103 Which is the comrect equation for the reaction of magnesium with hydrochloric acid to produce hydrogen and magnesium chloride? A) M8+2HClH2+MgCl2 B) Mgg+HClH+MgCl C) 2Mgg+6HCl3H2+2MgCl2 DD) Mgg+2HICl2H+MgCl2 E) Mg+3HCl3H+MgCl2 104. When the reaction shown is correctly balanced, the coefficients are: KClO3KCl+O2 A) 1,1,1 B) 2,2,2 C) 2,2,3 D) 2,2,1