C. Complete the following combustion reaction. Write your balanced equation two different ways. C8H18+O2→
C8H18+O2 →

Required Answer:

The substance in reactants side shows a alkane which is burnt. As a result of combustion, Carbon dioxide and water is formed.

The equation will be like this:

Now here we can see that the stoichiometric coefficient is a fraction, hence Multiplying 2 in both sides of the eq.

Mass is the amount of matter in an object.  weight is the measurement of the pull of gravity on an object.  say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165)  now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon.  however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant.  in conclusion it is possible for your weight to change as your mass remains constant. 

The molar mass of a substance is defined as the mass of 1 mol of that substance, expressed in grams per mole, and is equal to the mass of 6.022 × 10 23 atoms, molecules, or formula units of that substance.