Explain why scientists use resonance structures to represent some molecules

Given the statements: a. the salt bridge prevents electrical contact between solutions of half-cells. b. the salt bridge prevents the direct mixing of one half-cell solution with the other. c.

If the heat of combustion for a specific compound is - 1230.0 kJ/mol and its molar mass is 46.95 g/mol, how many grams of this compound must you burn to release 354.10 kJ of heat?

If a neutral atom of beryllium has 4 protons and 5 neutrons, what is the mass number of the atom?

Consider this equilibrium: N2 (g) + 2O2 (g) NO2 (g). Equal amounts of N2 and O2 are added, under certain conditions, to a closed container. Which changes occur in the reverse reaction as the system proceeds toward equilibrium? A.

39 is two fifths of what number

Which microscope came out first

Which exerts greater pressure on the floor-standing flat-footed or standing on tiptoe? on tiptoe, because the force acts over less area on tiptoe, because the force acts over more area flat-footed, because the force acts over more area flat-footed,

1. Sara tells Michael she is 160 centimeters tall, while Michael says he is 60 inches tall. If there are 2.54 centimeters in an inch, who is taller

How do you tell if a compound is polar or non polar

What two ions are central to the arrhenius definitions of acids and bases?