Question

Какое количество вещества алюминия содержится в образце этого металла массой 12г

Answer 1

M(AL)=27g/mol
n(Al)=m/M=12/27=0.44 mol
ответ 0.44 моль

Answer 2

Calculating the Amount of Aluminum in a 12g Sample

To calculate the amount of substance (in moles) of aluminum in a 12g sample, we can use the molar mass of aluminum. The molar mass of aluminum is approximately 27g/mol.

Step 1: Calculate the moles of aluminum in the 12g sample We can use the formula: \[ \text{moles} = \frac{\text{mass}}{\text{molar mass}} \]

Substituting the values: \[ \text{moles of aluminum} = \frac{12g}{27g/mol} = 0.444 mol \]

Step 2: Convert moles to the amount of substance The amount of substance is measured in moles, so the amount of substance of aluminum in the 12g sample is 0.444 moles.

Therefore, the amount of substance of aluminum in a 12g sample is approximately 0.444 moles.