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I believe I understand your question to be if all the apps you have previously used are on your S5.
If the apps are not installed, the apks are not on your device. You can go to the Google Play Store app on your device, select My Apps and slide over to ALL (instead of INSTALLED). This will list every app you have ever bought or downloaded, and you can install them again. Logging into your Google account does not place the apks of everything on the device.