How many grams of methane must you burn (CH4 + 2 O2 ==> CO2 + 2H20 DH 891 kJ/mole) to heat 0.8 kilograms of water (C = 4.18 J/g C) 13.0 °C

is has three carbons, so the answer is propylamine.

meth-

eth-

prop-

but-

pent-

hex-

hept-

oct-

non-

explanation:

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.