How many kilojoules of heat energy are
absorbed when 100.0 g of water are heated
from 20.0°c to 30.0°c?
(1) 4.18 kj
(3) 418 kj
(2) 41.8 kj
(4) 0.418 kj

The answer is 1- 4.18 KJ !

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.