How many lb of steam in 8oz water?

To convert ounces of water to pounds, you can use the fact that there are 16 ounces in a pound. Therefore, 8 ounces of water is equal to 0.5 pounds (8 oz ÷ 16 oz/lb). If you are asking about the weight of steam produced from 8 ounces of water when it is converted to steam, the mass remains the same at 0.5 pounds, as mass is conserved during the phase change. However, the volume of steam will be much larger due to the difference in density between water and steam.