A student prepared a stock solution by dissolving 10.0 g of NaOH in enough water to make 150.0 mL of solution. She then took 15.0 mL of the stock solution and
diluted it with enough water to make 65.0 mL of a final solution. What is the
concentration of the final NaOH solution?

What mass of carbon dioxide is produced from the complete combustion of 4.50×10−3 g of methane?

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

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