A car travels northwest for 2 hours and covers a distance of 90 miles. What is the average velocity of the car?
a 45 mi/h northwest
b 42 mi/h northwest
C 36 mi/h northwes
d 40 mi/h northwest

The answer is true for your question.

Ions gain or lose electrons

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.