Most rocks are made of what elements? oxygen, silicon, aluminum, iron, calcium, sodium, potassium, magnesium

quartz, granite, marble, limestone, shale, sandstone, obsidian, mica

carbon, hydrogen, rubidium, nickel, zink, copper, lead, gallium

lithium, nitrogen, selenium, fluorine, chlorine, antimony, gallium, tin

Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution?

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.

Why is the melting of ice a physical change ?