Final answer:
The density of carbon monoxide gas is 0.00164 g/ml.
Step-by-step explanation:
The density of a substance is calculated by dividing its mass by its volume. In this case, we are given that 0.246g of carbon monoxide gas occupies a volume of 150 ml. To find the density, we divide the mass by the volume:
Density = mass / volume
Therefore, the density of carbon monoxide gas is:
Density = 0.246g / 150 ml = 0.00164 g/ml