What will be the name of this hydrocarbon ? 2,3 dimethyl nonane
2,3 dimethyl ,4 ethyl heptane
2,3 dimethyl ,4 propyl hexane
4 ethyl 2,3 dimethyl heptane
with explanation ,please

Astudent completes a titration by adding 12.0 milliliters of naoh(aq) of unknown concentration to 16.0 milliliters of 0.15 m hcl(aq). what is the molar concentration of the naoh(aq)? 1)5.0 m 2)0.20 m 3)0.11 m 4)1.1 m