Question

Помогите определить массу вещества 0.2 молях метанола

Answer 1

Ответ:

m(C2H5OH) = 0,2 моль×(12×2+1×6+16) г/моль = 0,2 моль*46 г/моль = 9,2 г

Ответ: 9,2 г этанола.

Объяснение:

если нужно найти массу 0,2 моль этанола, то вот так)))

Answer 2

Ответ:

ответ на этот вопрос 9,2г этанол

Answer 3

Calculating the Mass of 0.2 Moles of Methanol

To determine the mass of 0.2 moles of methanol, we can use the formula:

mass = moles × molar mass

First, let's find the molar mass of methanol.

Methanol has the chemical formula CH3OH. To calculate the molar mass, we add up the atomic masses of all the atoms in one molecule of methanol.

The atomic masses are approximately: - Carbon (C): 12.01 g/mol - Hydrogen (H): 1.008 g/mol - Oxygen (O): 16.00 g/mol

Calculation

Using the atomic masses, we can calculate the molar mass of methanol: - Carbon (C): 12.01 g/mol × 1 = 12.01 g/mol - Hydrogen (H): 1.008 g/mol × 4 = 4.032 g/mol - Oxygen (O): 16.00 g/mol × 1 = 16.00 g/mol

Adding these together gives us the molar mass of methanol: 12.01 g/mol + 4.032 g/mol + 16.00 g/mol = 32.042 g/mol

Now, we can use the formula to calculate the mass of 0.2 moles of methanol: mass = 0.2 moles × 32.042 g/mol

Result

mass = 0.2 moles × 32.042 g/mol = 6.4084 grams

So, the mass of 0.2 moles of methanol is approximately 6.4084 grams.