Write the combustion equations and calculate the carbon intensities of
– carbon, c, with heating value of 32.8mj/kg and molar mass 12 kg/kmol
– methane, ch4 , with high heating value of 55.5mj/kg, molar mass 16kg/kmol •
2) consider the hydrogen to carbon ratio of the three fuels: carbon (coal), octane (gasoline), methane (natural gas). this is defined as the number of hydrogen atoms divided by the number of carbon atoms in the fuel molecule. for example methane has a ratio of 4. graph the carbon intensity (kgco2 / million btu) for the three fuels as function of the hydrogen to carbon ratio.

Determine the  wavelength of light emitted when an electron  in an li2+ ion  makes a transition from an orbital with n  =  6 to an orbital with n  = 5.

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.