if no and nh3 are allowed to effuse through a porous membrane under identical conditions, the rate of effusion for nh3 will be times that of no .

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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.

Answerstudying coal cumbustion as an energy source;

D=m/v =57.9/3 = 19.3 g/cm^3