can someone tell me how kendra dies again?

In Becoming part one

Angelus tricked Buffy into leaving her friends alone in the library. Then Drusilla and some other vampires came to the library and attacked the gang. They captured Giles and put Willow in a coma. Drusilla put Kendra in a trance then cut her throat with her finger nail and left her dead. Kendra was kind of put in a bad situation anyway because she had given Buffy Mr Pointy :P

Drusillia put her in a trance and then slit her throat (with her fingernail, yuck!)