Is the Acer C723T good for schoolwork?

Yes for basic schoolwork: documents, web apps, video classes and note-taking on the touch screen. The 8GB of RAM helps with many browser tabs. Heavy apps and large local files will strain the 32GB of storage.

Can it be used as a tablet?

Yes. The 360-degree hinge lets the screen fold back into tablet mode, and the touch IPS panel works for tapping and swiping. It is an 11.6-inch device, so it is fairly large to hold as a tablet.

How much storage does it have, and can it be expanded?

It has 32GB of eMMC storage. Chrome OS relies on cloud storage, but 32GB leaves little room for offline files. Check for a microSD slot if you need more local space.

How does it compare with other budget Chromebooks?

Its main edge is 8GB of RAM and a touch convertible screen at 11.6 inches. Many rivals at this size use 4GB of RAM and non-touch panels, but some offer more storage or faster Intel or AMD chips.

Does the battery really last 15 hours?

Acer rates it at up to 15 hours. Real-world use with the screen at higher brightness and video streaming will be shorter. Light browsing and reading should get you through a full school or work day.