When a sample of Mg(s) reacts completely with O(g), the Mg(s) loses 5 moles of electrons. How many moles of electrons are gained by the O2(g)?
1.0 mol
2.5 mol
5.0 mol
4
10.0 mol​

In an energy pyramid, which level has the most available energy?

Put these processes of the water cycle in the correct order, starting at the point where the water is in the lake: 1. water evaporates into the atmosphere 2. rain, snow, or other precipitation falls 3. water collects into larger bodies of water 4. water vapor condenses into liquid water

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.