2.91 mol Al * ( 26.982 g Al / 1 mol Al) = 78.518 grams
C. A magnet causing a metal object to move
Pressure =vapor pressure of 2 methlypentane at 150F. If you
Answer:
ΔHrxn = [(1) -1675.5 ( kJ/mole) + (2) 0 ( kJ/mole)] - [(1) -824.3 ( kJ/mole) + (2) 0 ( kJ/mole)]
Explanation:
ΔHrxn = 2ΔHf (Al₂O₃) - ΔHf (Fe₂O₃)
Remember that for pure elements in their standard state of temperature and pressure by definition their standard heats of formation are zero.
ΔHrxn = 2(-1675.7) - (-824.3) kJ/mol
ΔHrxn = 2527 kJ/mol
1. option C. cellulose
2. option A. angiosperms (I found in Internet that they represent 80% of the green plants)
