Chemistry
Grade-9
Easy
Question
Statement-1: The relative atomic mass of sodium carbonate is 286
Statement -2: The relative atomic mass of Aluminum sulphate is 132
- Both 1 and 2 are correct
- Both 1 and 2 are incorrect
- 1 is correct and 2 is incorrect
- 1 is incorrect and 2 is correct.
Hint:
Relative atomic mass, also known by the deprecated synonym atomic weight, is a dimensionless physical quantity defined as the ratio of the average mass of atoms of a chemical element in a given sample to the atomic mass constant.
The correct answer is: Both 1 and 2 are correct
Relative atomic mass, also known by the deprecated synonym atomic weight, is a dimensionless physical quantity defined as the ratio of the average mass of atoms of a chemical element in a given sample to the atomic mass constant.
Relative atomic mass of sodium carbonate, Na2CO3 = (2
23 + 12 + 316) = 286
Relative atomic mass of aluminum sulphate, Al2(SO4)3 = (226 + 332 + 1216) = 342
1 is correct and 2 is incorrect.
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