Barium-122 has a half-life of 2 minutes. A fresh sample weighing 80.0 g was obtained. If it takes
10 minutes to set up an experiment using barium-
122, how much will be left when the experiment
begins? *
2.50 g
5.00 9
O 10.09
1.25 g

How many atoms are there in 5.70 mol of mg

Which formula can be used to calculate the molar mass of hydrogen peroxide

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.