HEY EVERYONE its poofett my account got deleted for no absolute reason! >:D​

Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

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