When conducting an experiment in the lab, a student was able to actually recover 31.3 grams of Zinc Chloride. Using the balanced chemical equation (2NaHCO3 → Na2CO3 + CO2 + H2O) the student predicted that they theoretically should have been able to make 49.1 grams of Zinc Chloride.

What was the percent yield of this reaction?

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.  

35. a insulated cylinder of solid gold (k 310 kw/m-k) of radius v2 m and height 5 m is heated at one end until the temperature at each point in the cylinder is given by w(r, y, z) (30 z2)(2-(r2+ y2). determine the rate of heat flow across each horizontal disk given by z 1, z 2, and z 3, identifying which has the greatest rate of heat flow across it.

explanation: