Question

Сколько моль составляет 160 гр гидроксида натрия?

Answer 1

N(NaOH)=m(NaOH)/M(NaOH)
M(NaOH)= 40 г/моль
n=160/40=4 моль
Ответ: 4 моль

Answer 2

Calculation of Moles of Sodium Hydroxide

To calculate the number of moles of sodium hydroxide (NaOH) in 160 grams, we need to use the formula:

moles = mass / molar mass

The molar mass of sodium hydroxide (NaOH) is the sum of the atomic masses of sodium (Na), oxygen (O), and hydrogen (H). According to the periodic table, the atomic masses are approximately:

- Sodium (Na): 22.99 grams/mole - Oxygen (O): 16.00 grams/mole - Hydrogen (H): 1.01 grams/mole

Adding these atomic masses together, we get:

molar mass of NaOH = 22.99 + 16.00 + 1.01 = 40.00 grams/mole

Now we can substitute the values into the formula:

moles = 160 grams / 40.00 grams/mole

Calculating this, we find:

moles = 4.00 moles

Therefore, 160 grams of sodium hydroxide is equal to 4.00 moles of sodium hydroxide.