Question

How many molecules of NaCl are in 58.5 g NaCl?

Answer 1

Answer:

6.023*10 ²³ molecules

Explanation:

Moles is denoted by given mass divided by the molecular mass ,  

Hence ,  

n = w / m

n = moles ,  

w = given mass ,  

m = molecular mass .

From the question ,

given mass of NaCl = w = 58.5 g

As we know the molecular mass of NaCl = m = 58.5 g/mol

Moles can be calculted from the above formula -

n = w / m  =  58.5 g / 58.5 g/mol = 1 mol

Since , 1 mol has 6.023*10 ²³ particles ,

Therefore ,

1 mol of NaCl = 6.023*10 ²³ molecules