A. LÍ THUYẾT Câu 1: Thế nào là alcohol, phenol, andehit và axit cacboxylic. Viết CTTQ và nắm phương pháp gọi tên các hợp chất này? Xác định bậc alcohol Câu 2: Nắm vững tính chất Vật lí, tính chất hóa h...

To solve the problem, we can use the given information that 1 alcohol unit is equivalent to 10 mL (or 7.89 g) of pure ethanol. According to the health recommendation, an adult should not consume more than 2 alcohol units per day. We need to find out how many milliliters of 40% alcohol a grown-up should not exceed in a day. We can start by converting the given limit of alcohol units into milliliters. Let's denote the maximum amount of alcohol in milliliters as x. Then, we can set up the equation: $$ Solving for x gives us: $$ So, a grown-up should not consume more than 20 mL of pure ethanol per day. However, since the given question asks about consuming 40% alcohol, we need to adjust our answer accordingly. To find out how much 40% alcohol a grown-up should not exceed in a day, we can use the concept that: $$ $$ Substituting x with its value: $$ Therefore, a grown-up should not consume more than $$ mL of $$ alcohol per day. Hence, the final answer is: The limit for consuming alcohol per day is $$ mL.