What does Avogadro's number represent? A. How much 1 atom of a substance weighs. B. The number of molecules in 1 mole of a substance. C. The number of molecules in 1 atomic number of a substance. D. How much 1 mole of a substance weighs.

Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?

Analyze how limestone is weathered and identify the features that are formed as a result of this dissolution

Read the chemical equation. 2c2h2 + 5o2 → 4co2 + 2h2o which of the following statements would be correct if one mole of c2h2 was used in this reaction? one mole of oxygen was used in this reaction. five moles of oxygen were used in this reaction. four moles of carbon dioxide were produced from this reaction. two moles of carbon dioxide were produced from this reaction.