2. Mercury chloride is made of mercury chloride and distilled water in the ratio of 1: 50. How many kilograms of mercuric chloride and distilled water do you need to make 3.06 kilograms of mercuric chloride?
3. Yongning Township has a 4.5-hectare arable land, where grain crops and cash crops are planted, and the area ratio of oil crops is 9: 4: 2. How many hectares are planted in each of these three crops?
4. The school bought three bottles of red, blue and black ink * *165, and their ratio was 6: 5: 4. How many bottles of red, blue and black ink did you buy?
5. Three kinds of vegetables ***8500 kg were delivered from the market, including 4300 kg of green vegetables, and the ratio of celery to spinach was 9: 6. How many kilograms of celery and spinach?
6. The ratio of the degrees of the three internal angles of a triangle is 1: 3: 5. Find the degree of each inner angle of this triangle and explain what triangle it is.
7. Form a triangle with 96 cm long iron wire, and the length ratio of three sides of the triangle is 3: 4: 5. What are the lengths of the three sides?