6. How would the calculated value for the number of moles of HCl reacted be affected if the student failed to rinse the wet buret with NaOH solution before filling it

Ibelieve its a because an empirical formula usually has a ch in it your options are a or b

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Answerd. may include all of these are many definitions of bases: the  brønsted-lowry definition of acids and bases says that bases are proton acceptors.the arrhenius definition of acids and bases says that bases increase [oh⁻] in solution (thereby producing oh⁻ ions)the lewis definition of acids and bases says that bases donate electron pairs.therefore, the sensible answer is that a base may include all of the described characteristics.