13. To "afterburn" 100 g of CO to CO2 in a platinum-palladium catalytic honeycomb requires the consumption of 57.2 g of O2. How many kilograms of O2 is needed to afterburn 85 kg of CO?

11 players on a field that has a maximum of 11 players

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.

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