Question

На лабороторных весах звесили кусочек цинка его масса оказалась 13г.вычислите количество вещества

Answer 1

V=m/M
V=13/65=0,2 моля

Answer 2

Calculating the Amount of Substance of Zinc

To calculate the amount of substance of zinc, we can use the formula:

Amount of substance (in moles) = Mass / Molar mass

Given: - Mass of zinc = 13g

First, we need to find the molar mass of zinc.

The molar mass of zinc (Zn) is approximately 65.38 g/mol.

Now, we can calculate the amount of substance of zinc:

Amount of substance = 13g / 65.38 g/mol Amount of substance ≈ 0.1987 moles

Therefore, the amount of substance of the zinc sample is approximately 0.1987 moles.