Which prefix is used to indicate that the main chain of a hydrocarbon contains four carbon atoms? quad- non- but- prop-

"But-" is the prefix used to indicate main chain of hydrocarbon containing four carbons.

Explanation:

The following prefixes are used for hydrocarbon containing different number of carbon atoms (as per IUPAC).

Number of carbon atoms     Prefix

1                                                meth

2                                                 eth

3                                                prop

4                                                  but

5                                                     pent

6                                                   hex

7                                                   hept

8                                                  oct

9                                                    non

10                                                   dec

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