can't open google chrome

Normally, this indicates an issue with your normal user account. What that is can be difficult to track down.

My first typical test is to create a new, empty folder on the desktop. Open your user account's Preferences folder and move everything from there into the empty folder so that the Preferences folder is now empty. Immediately restart the Mac.

When it comes back to the desktop, it will look like you just took the Mac out of the box. Everything, as far as the desktop is concerned, will be back at the defaults. A downside of this is lots of apps store there registration data there, so third party apps may ask you to enter your serial number again. This was part of the reason for moving the Preferences folder items rather than deleting them. If an app does ask, quit the app, find its preference file in the desktop folder you made and drag it back to the Preferences folder. Overwrite any new one the app may have created.

Yes, it's tedious, but there's no point taking the time to reinstall the OS or applying the Combo updater when a new account pretty much proves the OS is not the problem.

Edit: Before any of the above, what it sounds like is damaged is the LaunchServices database. Reset it and see if that's all that needs to be done. It's easy to do. Open the Preferences folder in your user account. Put this subfolder in the trash and restart:

com.apple.LaunchServices

after my computer crashed overnight ...

Whatever the problem is, that seems to be its first clue. Your Mac shouldn't have crashed. For some reason downloaded apps are no longer being properly identified as launchable.

You already received and acted upon solid advice, but before you reinstall macOS you might simply try updating it. macOS 10.15.3 is the current release.

Reinstalling macOS is certainly simple enough, but keeping it updated is even simpler, and you ought to be doing that anyway:

Keep your Mac up to date - Apple Support

This macOS 10.15.3 "Combo" update might be the way to go; unfortunately there's no guarantee it won't suffer from the same inability to launch: Download macOS Catalina 10.15.3 Combo Update. Perhaps try downloading it in "Safe Mode" and installing it while in that mode: Use safe mode to isolate issues with your Mac.

Top Processes Snapshot by Memory:

...

launcher 98 MB (Mojang AB)

I don't know what that is. It may be another clue. (Edit: it's used for Minecraft. Probably unrelated)

Timetec replaced the RAM for free since the one we had wasn't made for mac i guess... i've had the new RAM in for about 2 days now and it seems to be working normally again! Thank you for your and John Galt's help :)

You have very little running in the way of third party software, and none of what I see is a concern. Wacom drivers, MalwareBytes, Valve for online games, and BlueStacks to emulate the Android OS (for playing Android games on your Mac, I presume). I wouldn't think the last one would be causing such problems, but you never know.

Since there isn't much of a hint in the report why the OS would be confused about an app, and not even show its icon correctly, I'd first create a full, restorable backup, then reinstall the OS. May not help, but it would eliminate a damaged OS as a possibility.

Excellent suggestion by John I frequently forget.

The Combo updater contains all of the updates released since 10.15.0 in one installer package. It's not an entire install of the OS, but a large percentage of it.

Good question. I only have these two in Catalina:

But they are just preference files in the user account. You should be able to safely remove any of them.

Kurt Lang wrote:

Edit: Before any of the above, what it sounds like is damaged is the LaunchServices database.

I agree that's a good place to start. Which one though?

From the appearance of the icon, I'd say it's damaged. Do you have the latest version?

Beyond that, Chrome is not your friend. It's not only a resource hog, it collects anonymized data of your computer and Internet usage the entire time your computer is running and sends that info to Google's servers, whether Chrome itself is open or not. There's a reason it's free, and it's not for your benefit.