Question

Найти количество вещества cl2, если его масса 71г.

Answer 1

Дано
m(Cl2)=71 г
M(Cl2)=71 г/моль
Найти
n(Cl2)
n(Cl2)=m(Cl2)/M(Cl2)=71/71=1 моль

Answer 2

To find the amount of substance (moles) of Cl2, you can use the molar mass of chlorine gas (Cl2), which is the sum of the atomic masses of two chlorine atoms.

1. Find the molar mass of Cl2: Molar mass of Cl2 = 2 × Atomic mass of Cl ≈ 2 × 35.453 g/mol (atomic mass of chlorine) ≈ 70.906 g/mol

2. Calculate the number of moles (n) using the given mass (m) and molar mass (M) formula: n = m / M

Given mass (m) = 71 g Molar mass (M) = 70.906 g/mol

n = 71 g / 70.906 g/mol ≈ 1 mol

So, there is approximately 1 mole of Cl2 in 71 grams of chlorine gas.