Carbon monoxide reacts with oxygen to produce carbon dioxide. If 8.6 L of carbon monoxide reacts with oxygen at STP, how many litres of oxygen are required to react? 2CO(g) + O2 à 2CO2(g)

the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.

i think it is true since you can test the answer and can use observations to complete it.

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

c. is the answer

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