4. 1: 1。 According to the query of China Postgraduate Entrance Examination Network, in 2022, the number of chemistry graduate students enrolled in Northwest University was 4.57 million, with a growth rate of 2 1.20%, the number of students enrolled was1/07000, and the enrollment ratio was 4. 1: 1. Northwest University, located in Xi City, Shaanxi Province, is a "double-class" construction institution and a "2 1 1 engineering" construction institution.