What coefficients are needed to balance the following equation? h2o + fe fe2o3 + h2

Determine the mass of fuel required for the expected energy consumption in the united states for the next ten years. energy use per person per year in the united states = 3.5 x 1011joules base calculations on current population of 310,000,000.

Find the mass, in grams, of 5.00*10^23 molecules of f2

Sum of brother and sisters age is 26. four times the brothers age is subtracted from three times the sisters age, the difference is 8. what are the ages of the brother and sister?