Calculate the mass of Al sulfide obtained by reacting 270 Al with S.

1.Find the amount of aluminum substance by the formula: n = m: M.

2. We make the equation of the reaction between aluminum and sulfur. We indicate the quantitative relationship in which aluminum and aluminum sulfide participate in the reaction. It can be seen from the equation that the amount of aluminum substance is 2 times greater than that of aluminum sulfide, that is, they react as 2: 1.

3.Calculate the amount of aluminum sulfide.

n (Al2S3) = 10: 2 = 5 mol,

or

2 mol (Al) – 1 mol (Al2S3),

10 mol (Al) – х mol (Al2S3),

x = (10 x 1): 2 = 5 mol.

4. Find the mass of aluminum sulfide by the formula.

Answer: mass (Al2S3) = 750g.