Per NCERT Class 11 Chemistry, what is the SI definition of the MOLE — adopted in 2019 redefinition?
AOne mole contains exactly 6.02214076 × 10²³ elementary entities — fixed value of Avogadro constant
BOne mole = 22.4 L at STP
COne mole = 1000 millimoles
DOne mole = mass of 12 g of carbon-12
Answer & Solution
Correct answer: A. One mole contains exactly 6.02214076 × 10²³ elementary entities — fixed value of Avogadro constant
Per NCERT §1.3.3 + §1.8, post-2019 SI: 1 mol = exactly 6.02214076 × 10²³ entities. The other options are older or contextual definitions.
Related questions
Per NCERT, the MASS PER CENT of an element in a compound is calculated using which formulaPer NCERT Problem 1.2, what is the MOLECULAR formula of the compound (empirical CH₂Cl, molPer NCERT Problem 1.2, a compound has 4.07% H, 24.27% C, 71.65% Cl, with molar mass 98.96 Per NCERT, the empirical formula of glucose is CH₂O. Given molar mass = 180 g/mol, what isPer NCERT, what is the MOLECULAR formula of a compound?Per NCERT, what is the EMPIRICAL formula of a compound?Per NCERT, what is the MASS PERCENTAGE of oxygen in WATER (H₂O)?Per NCERT, what is the MASS PERCENTAGE of hydrogen in WATER (H₂O) — given molar masses C=1