Which four quantities a, b, c and d are required to balance the equation ... aAl +bFe2O3 ==> CAl2O3 + dFe?

If i can still dissolve more sugar into the solution at a certain temperature what would i call that solution

If i initially have a gas at a pressure of 12 atm, a volume of 23 liters, and a temperature of 200 k, and then i raise the pressure to 14 atm and increase the temperature to 300 k, what is the new volume of the gas?

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space