In 80 gm of NaOH ,how many moles of NaOH are there?
2 Moles. ( 40g of NaOH is 1 mole)
THANKS!
To find out the number of moles of NaOH in 80 grams, you need to use the molar mass of NaOH. Here's how you can calculate it:
Step 1: Find the molar mass of NaOH.
The molar mass of Na (sodium) is 22.99 g/mol.
The molar mass of O (oxygen) is 16.00 g/mol.
The molar mass of H (hydrogen) is 1.008 g/mol.
NaOH is composed of 1 Na atom, 1 O atom, and 1 H atom.
So, the molar mass of NaOH = (1 × molar mass of Na) + (1 × molar mass of O) + (1 × molar mass of H)
= (1 × 22.99 g/mol) + (1 × 16.00 g/mol) + (1 × 1.008 g/mol)
Step 2: Calculate the molar mass.
Molar mass of NaOH = 22.99 g/mol + 16.00 g/mol + 1.008 g/mol
= 39.998 g/mol (rounded to four decimal places)
Step 3: Use the formula to find the number of moles.
Number of moles = (Mass of substance) / (Molar mass)
= 80 g / 39.998 g/mol
Step 4: Calculate the number of moles.
Number of moles = 2.000 moles
Therefore, in 80 grams of NaOH, there are 2 moles of NaOH.