Right-click in Chrome at the top where there are no tabs, and you should be given the option to open Chrome's task manager from the right-click menu. That should give you an idea of which chrome.exe is which - remember that Chrome is a frame and tab browser (like Internet Explorer), meaning the container that hosts the tabs themselves (i.e. the "frame") is a process, and each tab is also a process. Also note that with Chrome's design, any interop or loaded extensions are likely also opening sandboxed in their own chrome.exe process (I know Adobe flash is one of these), so yes, it is normal to have one tab open with at least 3 processes by default.