What is the mass in grams of 1.80 moles of calcium?

What is the molar mass of potassium nitrate, kno3

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.

Which of the following molecules is polar? c3h7oh c2h5cooh