Select the correct statements from the following.
A. In SI system, mole was introduced as fourth base quantity for the amount of a substance.
B. The mole of a substance always contains the same number of entities, no matter what the substance may be.
C. The molar mass in grams is numerically equal to atomic/molecular/formula mass in kg.
D. In three moles of ethane, the number of hydrogen atoms is 6 .
E. The term gram molecular mass can not be applied for 
Text Solution
Verified by ExpertsD
Among the given statements, only statement B and E are correct while the statement 
and
D are incorrect. Their correct from are :
• In SI system, mole was introduced as sixth base quantity for the amount of a substance.
• The molar mass in grams is numerically equal to atomic/molecular/formula mass in atomic mass unit.
• In three moles of ethane, the number of moles of hydrogen atoms is 18.
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