jasminealexandr
contestada

A sample of sodium hydroxide (NaOH) has a mass of 160.0 g. The molar mass of NaOH is 40.00 g/mol. How many moles of NaOH does this sample contain?

A) 4.000
B) 40.00
C) 160.0
D) 6,400

Respuesta :

taskmasters
The correct answer is A. A  sample of sodium hydroxide (NaOH) has a mass of 160.0 g which is equal to 4 moles of NaOH. TO calculate this, we use the relation of the molar mass given. 

160.0 g NaOh ( 1 mol NaOH / 40.0 g NaOH ) = 4.000 mol NaOH
chrissiloves33
The answer is a because all you have to is 160*1/40=4.000