Calculate the mass of copper atoms in 3.25 mol of Cu.

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

Convert the temperature of dry ice, –77 ∞c, into degrees fahrenheit and kelvin.

Consider the reaction: 2al(s) + fe2o3(s) → al2o3(s) + 2fe(s) the δhf for fe2o3(s) = -824.3 kj/mole. the δhf for al2o3(s) = -1675.7 kj/mole. finish the equation. δhrxn = [(1)( kj/mole) + (2)( kj/mole)] - [(1)( kj/mole) + (2) ( kj/mole)]