The measurement of the amount of matter in an object is its .

Balance the following reaction. as2s3 + 9o2 → 2as2o3 + so2

How can the number of core electrons be determined from the periodic table

If 4.8 moles of x and 3.4 moles of y react according to the reaction below, how many moles of the excess reactant will be left over at the end of the reaction? 3x + 2y “yields”/ x3y2. a. 1.7 mol y left over b. 1.6 mol x left over c. 0.2 mol y left over d. 0.1 mol x left over