For a certain mass of gas, its density p is the inverse proportional function of its volume V. When v = 10 cubic meters, P = 1.291 1. Finding the functional relationship between P and V 2. If v = 6.45M & # 179, the density of the gas can be obtained

For a certain mass of gas, its density p is the inverse proportional function of its volume V. When v = 10 cubic meters, P = 1.291 1. Finding the functional relationship between P and V 2. If v = 6.45M & # 179, the density of the gas can be obtained

1. From M = ρ V, ρ = m / V, substituting v = 10, P = 1.291, M = 12.91, so ρ = 12.91/v
2. Substituting v = 6.45M & # 179; into ρ = 12.91/v, ρ = 12.91/6.45 ≈ 2.002

The oxygen density in the oxygen cylinder is 1.43 kg / M & sup3;, what are the changes of its mass, volume and density after half use?
There are four options, which one is right?
A. The mass is half of the original B, the volume is half of the original C, the density does not change d, the mass, the volume and the density do not change

A

The density of oxygen in a steel cylinder is 6kg / m3. If 1 / 3 of the oxygen is used in one gas welding, the remaining oxygen density in the cylinder is?

Use one third of it,
2 / 3 × 6 = 4kg left
Density: 4kg / m3