Describe how chemistry is a part of your morning routine

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

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

Why is the melting of ice a physical change ?