Can someone help me with my science quiz in the comments

What volume of a 2.00 m stock solution of naoh is needed to prepare 150. ml of 0.40 m solution?

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?