A student wrote a chemical equation as shown. Fe2O3 + 3H2 → Fe + H2O
What should the student do to balance the equation?

A. Add a coefficient 2 before Fe and a 3 before H2O
B. Add a coefficient 3 before Fe and a 2 before H2O
C. Add a coefficient 4 before Fe and a 5 before H2O
D. Add a coefficient 5 before Fe and a 4 before H2O

the temperature of the gas, in k, not celsius.

it takes on an electronical energy

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.

weight of any object is given by

w = m*g

where m is mass of the object and g is the acceleration due to gravity.

for earth the value of g is 9.8 m/s^2 so

w=117.6 n m=12 g=?

117.6=12g => g=9.8 m/s^2

which is the force of gravity on earth.