Which statement about balanced chemical equations is false? Calcium oxide, when

Question

Which statement about balanced chemical equations is false? Calcium oxide, when dissolved in water, gives a solution which is: Four students, A thru D, determined the molarity of 0.1092 M NaOH and obtained these results. Which student's data has good precision but relatively poor accuracy? Which compound of those below would be predicted to be a stable entity? The elements (Ga, Ge, As, Se) have atomic numbers 31 through 34 The balanced chemical equation best represents the reaction that occurs when a few drops of hydrochloric acid are dropped on a rock containing CaCO_3?

Explanation / Answer

38.Answer B, because number moles on both sides need not be equal

Ex:                        N2   + 3 H2   ---------->   2NH3

Number of mole    1     +     3 =4                      2

39. Basic solution

CaO   +   H2O    ---------------->     Ca(OH)2

Ca(OH)2 is a base

40. student B because precision is getting same value repeatedly and accuracy is value near to true value.

41. I am not sure, I think it is C-AsF5

42.Answer C

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