Where can I download the chrome i386 deb file? [duplicate]
That's because Chrome 32-bit is no longer supported on Ubuntu. Chrome is also no longer supported on Ubuntu 12.04 with either 32-bit or 64-bit.
It is not a good idea to install the 32-bit version of Chrome on Ubuntu, as it no longer receives updates of any kind. That means an you'll have an outdated and insecure browser as soon as you install.
If you can't get 64-bit Ubuntu, you'll have to install Chromium instead.
sudo apt-get install chromium-browser
http://betanews.com/2015/11/30/google-killing-chrome-for-32-bit-linux/