M is a metal; X is a non-metal. Upon strong heating of 0.5000g of MXO3(s), it decomposes forming MO(s) and XO2(g). Then, all of the MO(s) was dissolved in water and excess acid, 100 mL of 0.120M HCl was added. The resulting solution required 40.0 mL of 0.050 M NaOH for complete neutralization. The rate of effusion of the XO2(g) was found to be 0.797 times that of N2(g) at the same temperature.
a. Find the number of moles of MO(s) formed.
b. Identify X.
c. Identify M.