The coating on the head of a match is highly flammable. when it burns, it releases a great deal of energy.
however, before the match can burn, it must gain a small amount of energy from a spark. that spark is
typically produced by striking (rubbing) the match head against a rough surface. sketch and describe a
potential energy diagram that represents the striking and burning of the match. remember to label the
diagram with the energy changes that occur. your answer must include the potential energy diagram
and a written description. (note: you do not have to use actual energy values.) (5 points) 3 points for
the
graph and 2 points for written description

r just means there's a number of carbon in teh chain. for example rcooh means that after x number of carbon, the chain ends with cooh.

explanation:

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.