Two samples of calcium fluoride are decomposed into their constituent elements. the first sample produced 0.154 g of calcium and 0.146 g of fluorine. if the second sample produced 294 mg of fluorine, how many g of calcium were formed? 0.309 g 3.09 × 102 g 3.13 g 0.280 g 2.80 × 102 g

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.

What is the molecular weight of copper

How many moles of no2 will form when 3.3 moles of cu are reacted with excess hno3?