Which of the following equations is balanced? A) 2 Fe2O3 + 3 C →
3 CO2 + 2 Fe
B) CH4 + O2
CO2 + 2 H20
C) Cu + 4 HNO3 → Cu(NO3)2 + 4 NO2 + 2 H2O
D) 4 NH3 + 3 O2 → 2 N2 + 6 H2O

What is histamine and what is its role in allergic reactions

Biology 1c cumulative exam i need awsners

An enzymatic hydrolysis of fructose-1-p, fructose-1-p(aq) + h2o(l) - fructose (aq) + pi (aq) was allowed to proceed to equilibrium at 25°c. the original concentration of fructose-1-p was 0.2 m, but when the system had reached equilibrium, the concentration of fructose-1-p was only 6.52 x 10^-5 m. calculate the equilibrium constant for this reaction and the free energy of hydrolysis of fructose-1-p.