A hot air balloon contains 6.78 x 10^29 molecules of gas. How many moles does it contain?

Ineed with my science work! it’s due tomorrow!

Why doesn't heat added to water make the tempature rise above 100c

Which statement is true about the model of the electromagnetic spectrum a: it change the frequencies of light. b: it compare wavelengths of light. c: the color of light waves can be changed using the model. d: the intensities of light waves can be decreased using the model.