Step 5: Explain the energy change in the reaction. a) Create a new blank document. Type your name at the top.
b) Write a few paragraphs describing the chemical reaction and explaining the energy change in
the reaction. Your document should:
i. identify the reactants and products.
ii. describe the change in energy that occurs as bonds are broken and formed.
iii. identify how the potential energy of the reactants compares to the potential energy of
the products.
iv. state and explain the net change in enthalpy.
v. identify whether the reaction is endothermic or exothermic.
vi. explain how energy is conserved between the reaction and the surrounding
environment.
This is the initial chemical equation: C3H8 + O2 = CO2 + H2O This is the balanced chemical equation: C3H8 + 5 O2 = 3 CO2 + 4 H2O

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).

it's c (engineer's do their work with mechanical stuff not on any living being)

i believe the answer is three water molecules