Calculate the number of molecules of NO2 in 0.25 mol of NO2 . Please show your work to receive credit.

Describe the chemical reaction based on the chemical equation below. also, explain whether the equation is balanced.

Jessica is traveling from miami, florida, to chicago, illinois. using the map, tell one way the land will change during the second half of her trip.

Joe shines white light into a bowl half full of water at an angle of incident of 27.5°. calculate the angle of refraction in the water given the indices of refraction for air and water are 1.00 and 1.36, respectively.