Given 1000. mL of a 0.117 M solution of pyridine (C5H5N pKb = 8.77), what is the pH if 100. mL of 0.849 M HCl are added?

How does litmus paper indicate an acid?

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

How many moles of oxygen react with 12 moles of aluminum