Question

What is the mass of 0.513 mol Al2O3? Give your answer to the correct number of significant figures. (Molar mass of Al2O3 = 102.0 g/mol)
0.513 mol Al2O3

Answer 1

.513mol x (102g/1mol)

Essentially, this is .513 x 102
Which equals: 52.326
But because you can only have 3 significant figures, your answer is:
52.3 grams

I hope this Helps!

Answer 2

Molar mass is the mass of 1 mole of substance.  The mass of 0.513 mol of $\bold{Al_2O_3 }$ is 52.326 g.

Molar Mass:

Is the mass of 1 mole of substance. 1 mole is equal to the $\bold{6.02\times 10^2^3}$ atoms, molecules or ions. It is measured in g/mol.

Here,

Molar mass of $\bold{Al_2O_3 }$ is 102 g/mol

The Formula,

$\bold{ n = \frac{Given Mass }{Molar Mass} }$

$\bold{ 0.513 mole = \frac{Given Mass( in Grams) }{102g/mol} }$

Solve the equation for given mass,

Given Mass =  52.326g

Hence we can conclude that the mass of 0.513 mol of $\bold{Al_2O_3 }$ is 52.326 g.

To know more about molar mass, refer to the link:

https://brainly.com/question/13152455