You cannot directly convert quarts into pounds because quarts are a measure of volume and pounds are a measure of weight. This is about the same as attempting to determine the weight of a liquid without knowing exactly what you are
Converting quarts to pounds
You can use water to attempt a direct conversion because the weight
and volume of water is typically the same. This means that a quart of water is equal to 2 pounds in weight.
density, this conversion will no longer work because the liquid will become heavier or lighter, depending on its density.
The denser a liquid is, the heavier it is going to be. Less dense liquids, on the other hand, are lighter.