BRAINLIEST: Answer this questions with steps to get 20 POINTS:

1. How many moles of nitrous acid will be produced when 0.55 moles of tetranitrogen hexoxide reacts with water?

Which position represents spring in the southern hemisphere? a) b) c) d)

Why does the sun appear to be the brightest star in the sky? a- its apparent brightness is much greater than other stars. b- it burns more gas, making it brighter than any other star. c- it is the largest star in the galaxy, so it is the brightest star. d- its relative distance to earth is closer than the other stars.

What happens to isotopes that are unstable?