PDF chapter test TRY NOW

Answer the following questions using the data given below:
 
a. A and R correct, R explains the A.
b. A is correct, R is wrong.
c. A is wrong, R is correct.
d. A and R are correct, R doesn't explains A.
  
1.
Assertion (A)The atomic mass of aluminium is 27.
Reason (R)
An atom of aluminium is 27 times heavier than 1/12th of the mass of the C–12 atom.
2.
Assertion (A)The Relative Molecular Mass of chlorine is 35.5 amu.
Reason (R)The natural abundance of chlorine isotopes are not equal.