What is the volume, in liters, of 0.250 moles of carbon monoxide at STP?

5and I carbon dioxide and water

5.6 L

Explanation:

Calculated it leads to the answer 5.6L

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.