What is the percent composition by mass of sulfur in the compoun MgSO4 120. grams per mole

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.

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?

The grooves or folds of the brain are called