Scoring standard of chemical calculation questions in Shenzhen senior high school entrance examination

If the chemical equation is correct, score1; If the relative molecular weight and related data are correct, score1; If the calculation process is correct, score 2 points. Shenzhen, referred to as Pengcheng for short, is located in the south of Guangdong Province, on the east bank of the Pearl River Estuary and adjacent to Daya Bay and Dapeng Bay in the east. West of the Pearl River Estuary and Lingdingyang; The Shenzhen River in the south is connected with Hong Kong; It borders Dongguan and Huizhou in the north. Shenzhen is a sub-provincial city in Guangdong Province. The total area of the city is 1, 952.84 square kilometers, and Shenzhen has 9 administrative districts and 1 new districts. By the end of 2022, the permanent population of Shenzhen was 1 766. 1.8 million.

In 2022, the GDP of Shenzhen was 3,238.768 billion yuan. As a young immigrant city, Shenzhen attracts innovative and creative talents from all over the world and the whole country to work and live here. The results of the seventh China population census show that the average age of Shenzhen residents is 32.5 years old. Well-known universities in Shenzhen include Shenzhen University and South University of Science and Technology.

Famous tourist attractions in Shenzhen include Wu Tongshan Scenic Area and shenzhen safari park. The name of Shenzhen was first recorded in the eighth year of Yongle in the Ming Dynasty (14 10). The market was established in the early Qing Dynasty and Shenzhen was established in 1979. 1980 became the first special economic zone established in China, the window of China's reform and opening up, and a new immigrant city.