A sheet of shiny metallic orange-colored copper (density 8.96 g/cm3) was electroplated with metallic silver-colored zinc (density 7.14 g/cm3). The resulting multi layered material which was copper colored on the inside and silver colored on the outside was then exposed to high heat. The material became a uniform bright gold color throughout and had a density of 8.55 g/cm3. The new material conducted electricity and was malleable. Was an alloy formed

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.

that tool would be a compass