Carbon bound in fossil fuels has different isotopes than carbon in atmosphere. Fossil fuels are underground and cosmic rays do not affect carbon in them same as atmosphere carbon. Carbon in fossil fuels that is underground longer than ten thousand years has only C-12 isotope and not C-14.
A number of factors combine to make high<span> conversion </span>molecular weight<span> ... to </span>higher<span> molecular weights, because the larger polymer molecules are the </span>most<span> likely to ... the polymerization is performed at rising </span>temperatures<span>, rather than isothermally, ... had a normal curve with a small fraction of </span>low-molecular weight<span> oligomers.</span>
Answer:
15.9 mol/kg is the molality for the solution
Explanation:
36.71% means that 36.71 g of solute are contained in 100g of solution
36.71 g → mass of solute
100 g → mass of solution (mass of solute + mass of solvent)
Mass of solvent → 100 g - 36.71 g = 63.29 g
Molality → moles of solute in 1kg of solent
We convert the mass of solute to mol → 36.71 g . 1mol/36.45 g =1.007 mol
We convert the mass of solvent from g to kg → 63.29 g . 1kg/1000g = 0.06329 kg
1.007 mol /0.06329 kg → molality → 15.9 m