An element X has a tribromide with the empirical formula XBr3 and a trichloride with the empirical formula XCl3. The tribromide is converted to the trichloride according to the equation
XBr3 + Cl2→ XCl3 + Br2
If the complete conversion of 1.334 g of XBr3 results in the formation of 0.722 g of XCl3, what is the atomic mass of the element X?
a. If 4.5 mol of ethane, C2H6, undergo combustion according to the unbalanced equation C2H6+O2---->CO2+H2O, how many moles of oxygen are required? b. How many moles of each product are formed?
during the cooling of a hot crucible, water vapor condensed on the crucible wall before its mass measurement. The condensation did not occur following the decomposition of the hydrated salt. Will the reported % water in the hydrated salt be too high or too low?