chemical reactions?

Question

1.Regarding electrolytes,all of the following statements are true except for which one?

A.Covalents bomds,such as those of sugar,make weak electrolytes in solution.

B.ionic compounds often form strong electrolytes when in solution.

C.Ammonia is a weak electrolyte because it produces few mobile ions.

D.Mobile ions formed as a result of dissocation cause solution to conduct electricity


2.Avagadro's number gives us the number of


A.atoms in any element or compound
B.particles in a mole of any element or compound
C.atoms in an element
D.particles in a sample

Answer 1

An electrolyte is a substance containing free ions which behaves as an electrically conductive medium. Because they generally consist of ions in solution, electrolytes are also known as ionic solutions, but molten electrolytes and solid electrolytes are also possible. They are sometimes referred to in abbreviated jargon as lytes.
http://en.wikipedia.org/wiki/Electrolyte

Avogadro's number, also called Avogadro's constant (NA), named after Amedeo Avogadro, is the number of atoms in a mole of a monatomic element or the number of molecules in a mole of a compound. Avogadro's number is formally defined in the SI as the number of carbon-12 atoms in 12 grams (0.012 kg) of unbound carbon-12 in its rest-energy electronic state. The accepted value is 6.0221415×1023 atoms/mole. In the nineteenth century physicists measured the mass of one atom of hydrogen to be about 1/(6.023x1023) grams; they were trying to evaluate how many molecules of an ideal gas would fit in 1 cubic centimeter [1]. Carbon-12 was chosen as the reference substance over hydrogen because its atomic mass could be measured more accurately.

http://en.wikipedia.org/wiki/Avogadro%27s_number

Answer 2

1 is A and 2 is B

Answer 3

Think #1 is C and #2 is definitely B