A general electron dot formula of a molecular compound is shown below. A
:B:A
A
In this formula, A and B represent elements but are not actual symbols for elements. Which element(s) can A represent?
а
Any element in Group 2A
b
Hydrogen only
c
Any element in Group 7A
d
Helium only

Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution?

Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)

Areader can tell that the meaning of “obnoxious” will include “having the quality of something” because of the .a) prefix b)pronunciation c)suffix d) word root