Select the correct statement regarding the following balanced equation

2mg + o2 > 2mgo

1)3 moles of mg will produce 6moles of mgo

2)when 100 grams of mg reacts with excess o2, 100 grams of mgo forms

3)for every mole of mgo produced, half the number of moles of o2 is consumed

4) 8 moles of o2 requires 4 moles of mg in order to react completely

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size