2Na + Cl2 → 2NaCl How many moles of Cl2 do you need to use in order to react with 34.485 g of Na?

moles (put 1 zero in front of the decimal)

Agas has a volume of 0.7 l at 300 mmhg. what would be the new volume at 900 mmhg

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

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5