Fill the blanks : a standing wave can only exist when thepath around the nucles accommodates a certain number of
1.orbit
2.wavelength
3.frequency
4.electrons
5.radiation

Anurse practitioner prepares an injection of promethazine, an antihistamine used to treat allergic rhinitis. if the stock bottle is labeled 25 mg/ml and the order is a dose of 11.0 mg , how many milliliters will the nurse draw up in the syringe?

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?

How many moles of no2 will form when 3.3 moles of cu are reacted with excess hno3?