Ascientist observes that the electrical resistance of a superconducting material drops to zero when the material is cooled to very low temperatures. which of the following statements best describes what the scientist is observing?
a. the scientist is observing the electrical power of a superconductor.
b. the scientist is observing the temperature of a superconductor.
c. the scientist is observing an intensive property of a superconductor.
d. the scientist is observing an extensive property of a superconductor.

It should be C,

Explanation:

It's intensive, that is mass independent.

resistance occurs due to electron movement,

for R=0, no electron movement should be there, hence intensive property.

The correct answer is C: The scientist is observing an intensive property of a superconductor.

Explanation:

I trusted the person above me for help and it paid off, thanks to them I got 100% (/^u^)/\(^u^\)

the correct name for the n3 ion is azide. azide is a polyatomic anion with a -1 charge and is written as n3 -1. it consists of three nitrogen atoms bonded together. hope i . let me know if you need anything else.

given:

mass of na = 115 g

excess cl2

to determine:

mass of nacl produced

explanation:

given reaction is-

2na(s) + cl2(g) → 2nacl(s)

since cl2 is in excess, na will be the limiting reagent

as per the reaction stoichiometry na: nacl = 1: 1

i.e. moles of na reacted = moles of nacl formed

now, # moles of na = mass of na/atomic mass

                                  = 115 g/23 g.mol-1 = 5 moles

therefore, moles of nacl = 5

molar mass of nacl = 58 g/mol

mass of nacl = 5 moles * 58 g.mol-1 = 290 g

ans: amount of nacl produced = 290 g