What is avogadro’s number? Does the Avogadro's number remain the same with isotopes too even if the element remains the same? [3 MARKS]
What is avogadro’s number? Does the Avogadro's number remain the same with isotopes too even if the element remains the same? [3 MARKS]
Definition: 1 Mark
Explanation: 2 Marks
Avogadro constant is defined as the number of constituent particles per mole of a given substance.
i.e. 6.022×1023 .The constant was later redefined as the number of atoms in 12 grams of the isotope carbon-12 (12C),
Now, we know that when we convert gram molecular weight to number of atoms it yields 1 mole of that substance..But when we deal with isotopes, since the atomic mass changes due to difference in the number of neutrons, this affects the gram atomic weight ,hence the number of moles. For example, Chlorine has a weighted average of 35.5 (amu) due to Chlorine istopes having different mass numbers ranging from 35 to 37.
Definition: 1 Mark
Explanation: 2 Marks
Avogadro constant is defined as the number of constituent particles per mole of a given substance.
i.e. 6.022×1023 .The constant was later redefined as the number of atoms in 12 grams of the isotope carbon-12 (12C),
Now, we know that when we convert gram molecular weight to number of atoms it yields 1 mole of that substance..But when we deal with isotopes, since the atomic mass changes due to difference in the number of neutrons, this affects the gram atomic weight ,hence the number of moles. For example, Chlorine has a weighted average of 35.5 (amu) due to Chlorine istopes having different mass numbers ranging from 35 to 37.
