Correctly balance k2cro4+pb(no3) 2+kno3+pbcro4

Determine the number o moles of ions/atoms/particle in the following: 2.50 miles of k2s (let me know how to do)

How many liters of hydrogen gas will be produced at stp from the reaction of 7.179×10^23 atoms of magnesium with 54.219g of phosphoric acid (h3po4) the equation is 3mg + 2h3(> mg(po4)2+3h2

Which statement best explains the relationship between an area is geography and the temperature of its surface water