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In the following reaction, which species is the reducing agent?3Cu  +  6H+  +  2HNO3 → 3Cu+2  +  2NO  +  4H2O

In the following reaction, which species is oxidized?8NaI  +  5H2SO4 →4I2  +  H2S  +  4Na2SO4  +  4H2O

From the following pair choose the one with the larger radius:  S or S-2.

When the following equation is balanced in acidic solution; NO3-  +  I- → IO3-  +  NO2the coefficient of NO3- is:

A [m] gram sample of potassium chlorate was decomposed according to the following equation:2KClO3 → 2KCl  +  3O2How many moles of oxygen are formed?

The density of gasoline is [d] g/mL at 20 oC.  What is the mass of one gallon of gasoline? (1 qt = 0.9463 L, 4 qt = 1 gal) (answer in grams)

Suppose the following reaction is carried out starting with 103 grams of Ca3(PO4)2 and 75.0 grams of H2SO4.  Which substance is the limiting reactant?  (Hint:  calculate the T.Y. for calcium sulfate first.)Ca3(PO4)2  +  3H2SO4 →  3CaSO4  +  2H3PO4

What volume (in liters) is occupied by [m] g of methane, CH4, at [t]  oC and [p] atm?

Give (in order) the correct coefficients to balance the following reaction:H2SnCl6  +    H2S →  SnS2  +    HCl

An oxygen sample has a volume of [v] L at [t] oC and [p] torr.  How many oxygen molecules does it contain?