How many atoms are in 0.25 moles of nitrogen

What is the overall order of reaction for rate = k[no2]2 ? second order 3/2 order third order zero order none of the listed answers are correct

According to coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?

Aradio signal from a gps satellite take only about 0.067 seconds to reach a gps reciever. if the speed of light is about 300,000km/s, then approximately how far away is the reciever from from the satellite?