In the following reaction, how many grams of ferrous sulfide (fes) will produce 0.56 grams of iron (iii) oxide (fe2o3)? 4fes + 7o2 → 2fe2o3 + 4so2 the molar mass of ferrous sulfide is 87.92 grams and that of iron (iii) oxide is 159.7 grams.

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3