Final answer:
The best estimate for the mass of a dog can be calculated based on the average blood volume per kg body weight. Dogs have approximately 80-90 ml of blood per kg body weight.
Step-by-step explanation:
The best estimate for the mass of a dog can be calculated based on the average blood volume per kg body weight. According to the given information, dogs have approximately 80-90 ml of blood per kg body weight. So, if you know the weight of a dog, you can estimate its mass by multiplying the weight in kg by 80-90 ml.
For example, if a dog weighs 20 kg, you can estimate its mass by multiplying 20 kg by 80-90 ml = 1600-1800 ml. However, keep in mind that this is just an estimate and can vary depending on the breed, size, and other factors.