What percent yield is obtained if 310 g of Au produces 340 g of NaAu(CN)2 when 4Au + 8NaCN + 2H2O + O2 --> 4NaAu(CN)2 + 4NaOH

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?