Answer:
true
Step-by-step explanation:
Moles - 
Moles is denoted by given mass divided by the molar mass , 
Hence , 
n = w / m 
n = moles , 
w = given mass , 
m = molar mass . 
From the above equation , if two of the quantity is known then the third quantity can easily be determined , by using the above formula , 
i.e. , 
n = w / m 
In case , mole ( n ) and mass ( w ) , is known , the value of the molar mass can be determined easily .
Hence , 
The given statement of the question is true.