Carbon is black, crystalline and hard. oxygen alone is a gas. how does the substance that is formed when these two elements combine differ from carbon?

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .

Sorry i think the answer is b

False, as a substance changes from a solid to a liquid and from a liquid to a gas the molecules get farther apart from each other

The mole ratio of hydrogen to ammonia is 3: 2.