1. The volume of Yili milk is 2.5 x 10-4m3. If the mass of the milk is 0.3KG, the density of the milk is kg / m3 2. Xiaokema bought a box of milk and put it on the horizontal floor. The contact area between the box and the floor is 0.025m2. The total weight of the box and the milk is 5kg. The packaging of each small bag of milk in the box is marked with the words "net content 220ml, 231g" (G is 10N / kg) Find out the density of this kind of milk, g / cm3 3. (Baiyin City, 2006) how many grams of alcohol can a bottle filled with 500 grams of water

1. The volume of Yili milk is 2.5 x 10-4m3. If the mass of the milk is 0.3KG, the density of the milk is kg / m3 2. Xiaokema bought a box of milk and put it on the horizontal floor. The contact area between the box and the floor is 0.025m2. The total weight of the box and the milk is 5kg. The packaging of each small bag of milk in the box is marked with the words "net content 220ml, 231g" (G is 10N / kg) Find out the density of this kind of milk, g / cm3 3. (Baiyin City, 2006) how many grams of alcohol can a bottle filled with 500 grams of water

Because we don't know the quality of the milk, if we ignore the weight of the box, we can approximate the density = m / v = 1200kg / m3
2 net content 220ml, 231g, the same
3. The density of water is 1000kg / m3, and the relative density of alcohol (water = 1): 0.8, so it can hold 400g