Elemental phosphorus can be produced by heating calcium phosphate from rocks with silica sand (SiO2) and carbon in the form of coke. The following reaction takes place. Ca3(PO4)2 3SiO2 5C £ 3CaSiO3 2P 5CO a. If 57 mol of Ca3(PO4)2 is used and 101 mol of CaSiO3 is obtained, what is the percentage yield? b. Determine the percentage yield obtained if 1280 mol of carbon is consumed and 622 mol of CaSiO3 is produced. c. The engineer in charge of this process expects a yield of 81.5%. If 1.4 105 mol of Ca3(PO4)2 is used, how many moles of phosphorus will be produced?

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.