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If Avogadro number NA is changed from 6.022 × 10²³ mol⁻¹ to 6.022 × 10²⁰ mol⁻¹ this would change:

1. the definition of mass in units of grams
2. the mass of one mole of carbon
3. the ratio of chemical species to each other in a balanced equation
4. the ratio of elements to each other in a compound

Correct answer: the mass of one mole of carbon

Solution

If Avogadro's number changes, the mass of one mole of a substance (e.g., carbon) would change because the number of particles in a mole is directly tied to Avogadro's number. However, the ratios in equations or compounds remain unaffected.

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