I am 19, a college student, and I’ve had my own apartment since August 2019. I was not claimed as a dependent on my mother’s return. I filed as single for 2019. Will I receive a stimulus che

[Hal_Al]

Yes, as long as your didn't check the box on form 1040 that says some one can claim you as a dependent. 

That said, having you own off campus apartment does not, by it's self, mean your parent  cannot claim you.  This is particularly so in your case, as you lived on your own less than half the year.

A child of a taxpayer can still be a “Qualifying Child” (QC) dependent, regardless of his/her income, if:

1. He is under age 19, or under 24 if a full time student for at least 5 months of the year, or is totally & permanently disabled
2. He did not provide more than 1/2 his own support. Scholarships are considered third party support and not as support provided by the student.
3. He lived with the parent (including temporary absences such as away at school, even if living off campus) for more than half the year. In your case, even if your move was permanent, Aug-Dec  is only 5 months.  That means you lived with your parents for 7 months and qualify as their dependent.

[JotikaT2]

No.

The IRS states that if you could be claimed as a dependent on someone else's return, you cannot receive the stimulus.  Even though your parent's did not claim you, your absence could still be considered temporary as you are away at college. 

See the following information on eligibility from the IRS.

Stimulus payment eligibility

If you are considered independent in 2020, you may still be eligible to claim a credit on your 2020 return for the stimulus payment.