Which is true of the enthalpy of a reaction?
A. Its value does not depend on which reactions are added
B. Its value is always a negative kJ/mol
O
C. Its value is the same as the enthalpy of each intermediate reaction
O
D. Its value depends on which reactions are added
SUBMIT

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

May someone me with these science questions

Liquid from a brewery fermentation contains 10% ethanol and 90% water. part of the fermentation product (50,000 kg/h) is pumped to a distillation column on the factory site. under current operating conditions, a distillate of 45% ethanol and 55% water is produced from the top of the column at a rate of one-tenth that of the feed. what is the composition of the waste "bottoms" from the still?