How many moles of electrons are required to reduce one mole of bromine gas (br2) to two moles of bromide ions ( 1 e- 2 e- 3 e- 4 e-

When the earth was formed and cooled, why did nickel and iron end up in the center of the earth while basalt and granite ended up in the outer layers

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

The sum of the oxidation numbers in a neutral compound is always