Is Pt ionic or covalent

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

What happens when the temperature of a solution increases?

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