Salim worked out that a reaction should yield 20g of product. However, when he actually carried out the reaction he found that only 15.5g of product were produced. Calculate the percentage yield to one decimal place.

first one is the correct answer

plasma is the state of matter where the substance is ionized and has no definite shape or volume. the fact of being ionized makes the substance a good electrical conductor.

the answer is c.the valence of the atoms combine .