if one mole of the compound Al4C3 has a mass of 144g and one mole of carbon has a mass of 12g, calculate the relative atomic mass of the element aluminium.
Subtract 3*12 from 144 (ie, 108)
Relative atomic mass= (108/4)/12
To calculate the relative atomic mass of aluminum, we need to consider the mass of one mole of the compound Al4C3 and the mass of one mole of carbon.
Given that one mole of the compound Al4C3 has a mass of 144g and one mole of carbon has a mass of 12g, we can subtract the mass of carbon from the mass of the compound to find the mass of aluminum.
144g - (3 x 12g) = 144g - 36g = 108g
Now, to calculate the relative atomic mass of aluminum, we divide the mass of aluminum by the mass of one mole of carbon:
Relative atomic mass = (108g / 4) / 12g
Simplifying the expression:
Relative atomic mass = 108g / 48g
Relative atomic mass = 2.25