Paul is describing a mineral to douglas over the phone. he explains that it has the same texture throughout but the color on the inside is different from the color on the outside. douglas tells paul that -
a) he is correct. paul has a mineral.
b) he is incorrect. a mineral has many textures.
c) he is correct. a mineral has one texture but more than one color.
d) he is incorrect. a mineral has just one color, inside and outside.

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

um i think it might be a car?

the maximum mass of nh3 is nh3 in grams