My friend and her family had dinner at a restaurant. the total bill was $74. they want to leave a 15% tip for the wait staff. how much should she pay total?

How many atoms are in 2 moles of phosphorus?

If a computer chip switches off -on-off in 0.015 us, what is the switching time in nanoseconds?

Most ionic compouds are crystalline solids at room temperature. true falseionic compounds are electrically neutral. true falseionic compounds generally have low melting points. true falsewhen melted, ionic compounds do not conduct electricity. true falsethe electrostatic attraction between an anion and a cation is an ionic bond. true false