chancy xdicey

(1) A sample of the hydrate CuSO4.5H2O has a mass of 12.5g. (a) how many molecules of hydrogen are contained in this hydrate? If the hydrate is completely dehydrated.

When 6.853 mg of sex hormone was burned in a combustion analysis,19.73 mg of CO2 and 6.391 mg of H2O were obtained. What is the empirical formula of the compound ?? Please be detailed...help me.

what is the percent yield of reaction in which 455g of tungsten (VI) oxide (WO3) reacts with excess hydrogen gas to produce metallic tungsten and 9.60 cm^3 of water.(density of water = 1.00 g/cm^3) ???

The decomposition of ammonia on a platinum surface at 1129 K occurs according to the following reaction: 2NH3 (g) ¨ N2(g) + 3H2(g). Use the following kinetic data which report the variation of ammonia concentration in the gas phase with time to evaluate...

0.01973 g of CO2 has 0.000448 moles of CO2 molar mass of CO2 = 44 g/ mole there is 1 mole of C in CO2 so moles of C in the compound = 0.000448409 moles mass of C = 0.00538 g 0.006391 g of H2O has 0.000355 moles of H2O molar mass of H2O = 18 g/ mole there...

please explain 'Use the following kinetic data which report the variation of ammonia concentration in the gas phase with time to evaluate the order of reaction?' am confused I did plot found it was a 0zero order but then what.i need to know the key points...