Using Hess's Law rearrange the fiven reactions to determine the heat of reaction for Fe2O3(s) + 3 CO(g) --> 2 Fe(s) + 3 CO2(g)

Explain waht needs to ve done to each reaction to determine the final reaction desired

reaction 1: 2 Fe(s) + 3/2 O2(g) --> Fe2O3(s) ^H = -824.2 KJ/mol

reaction 2: CO(g) + 1/2 O2(g) --> 2 CO2(g) ^H = -282.7 KJ

First reaction: ^ H becomes KJ/mol

second reaction ^H becomes KJ/mol

heat of reaction is KJ/mol

Compare and contrast physical changes with chemical changes.

Calculate the estimated density of each ball. use the formula d = m/v where d is the density, m is the mass, and v is the volume. record your calculations in table a of your student guide. given that the density of water is 1.0 g/cm3, make a prediction about whether each ball will float in water. record your prediction in table a. what is the estimated density of the table tennis ball? record your answer to the nearest hundredth

What is the vapor pressure of a solution with a benzene to octane?