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1) Exactly 10ml of Gas A(molar mass is 15g/mol)effuses through an opening in 2 seconds.Exactly 10 ml of GAS B effuses through the same opening in 8 seconds. WHAT IS the molar mass of gas B

2)A 130 ml sample of gas is collected over water at 22 celcius and 753 torr. What is the volume of the dry gas at STP. the vapor pressure of water at 22 celcius is 20 torr

3)oxygen gas, generated by the reaction 2KClO3 goes to 2KCl+ 3O2, is collected over water at 27 celcius in 2 L vessel at 760 torr.( the vapor pressure of water at 27 celcius is 26 torr).How many moles of KClO3 were consumed in this reaction?

4)A balloon conains an anesthetic mixture of cyclopropane and oxygen at 170 and 570 torr, respectively. What is the ratio of the numbers of moles of cyclopropane to moles of oxygen


please explain