A student weighs 5.0 g of sodium fluoride, formula mass 42 and dissolves it in enough water to fill a 259 ml flask. What is the concentration of the solution

Which best describes why nh4+ can form an ionic bond with cl-?

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?

Which of the following describes a situation where competition between producers exists