When 5.62 g of methane combusts in a calorimeter, the 25. g of water in the calorimeter goes from 25oC to 28oC. What is the heat of combustion (in kJ/mol) for methane

Write the chemical symbols for three different atoms or atomic cations with 27 electrons. asap!

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?