12. The mass in grams of 10.0 million molecules of sulphur dioxide is:  SO2    Answers:  a)1.06 X 10^-15  b)5.60 X 10^1  c)5.27 X 10^-20  d)1.43 X 10^-23  e)9.27 X 10^-23

Can you help me to write the label of the units for the moles, molar mass, molecules, and grams?

When copper is heated with an excess of sulfur, copper(1) sulfide is formed. In a given experiment, 1.50 g of copper was heated with excess sulfur to yield 1.56 g copper(1) sulfide. What is the percent yield?

Convert mass % to grams (assume 100gexactly)•Convert grams to moles.•Write simplest ratio of the elements. (Usually works by dividing the smallest number into the other numbers)•Write a formula with the closest small whole numbers from the ratio.

An impure sample of table salt (NaCl) that was dissolved in water and treated with silver nitrate to form silver chloride. If the initial sample had a mass of 1.741 g and the final mass of the AgCl was found to be 4.084 g, what is the mass percent of NaCl in the impure sample?

Select the quantity that contains the greater number of atoms in each of the following pairs of substance amounts. Make your selection using the periodic table, but without performing an actual calculation. a)  2.00 m o l e A r    OR   6.02 × 10 23 a t o m s N e                                [ Select ]                          ["2.00 moles of Ar", "6.02X10^23 atoms of Ar"]            b)  10.00 g o f F 2 OR    10.00 g o f O 2

(please type answer no write by hend)