What do all fossil fuels have in common?

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

Light waves can move through , but they travel fastest when they move through a(n) .

Balance the following reaction. as2s3 + 9o2 → 2as2o3 + so2