How many moles of He are in 16 g of the element? 1.0 mol 4.0 mol 8.0 mol 16 mol

Which of these best describes an ionic bond?

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.

Explain what happens at the saturation point when adding salt to water at room temperature.