how could you check that when the calcium carbonate is reacting with hydrochloric acid the gas given off is carbon dioxide

What is the number of atoms in 3.54 mol s

This drawing shows a human body system. what is the primary function of this body system?

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