Diamond is a covalently-bonded substance made of pure carbon. each carbon atom has six total electrons so this means carbon shares electron(s) with other carbon atoms.
a. one
b. two
c. four
d. six

The yearly amounts of carbon emissions from cars in belgium are normally distributed with a mean of 13.9 gigagrams per year and a standard deviation of 5.8 gigagrams per year. find the probability that the amount of carbon emissions from cars in belgium for a randomly selected year are between 11.5 gigagrams and 14.0 gigagrams per year. a. 0.340 b. 0.660 c. 0.167 d. 0.397