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…

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?\n4.000 moles\n40.00 moles\n160.0 moles\n6.400 moles

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?\n4.000 moles\n40.00 moles\n160.0 moles\n6.400 moles

Answer

Explanation:

Step1: Recall mole - mass formula

The formula to calculate the number of moles ($n$) is $n=\frac{m}{M}$, where $m$ is the mass and $M$ is the molar mass.

Step2: Substitute given values

Given $m = 160.0\ g$ and $M=40.00\ g/mol$, then $n=\frac{160.0\ g}{40.00\ g/mol}$.

Step3: Calculate the number of moles

$n = 4.000\ mol$.

Answer:

A. 4.000 moles