Knowing what you know about how a substance travels in diffusion, in order for carbon dioxide to leave the blood and enter the alveoli, there would be a [ HIGHER or LOWER ] concentration of carbon dioxide in the alveoli compared to the blood.

d. planting trees

the trees take in carbon to make oxygen.

answer: zinc is the substance which has a volume of 1.38 .

density is defined as the mass of an object per unit volume.

it can be calculated by dividing mass of a substance by its volume i.e.

si unit of density is kg per cubic meter and cgs unit of the same is gram per cubic centimeter.

now from the given data volume can be calculated by the formula .

hence, the volume of aluminium will be = which comes out to be 1.703 .

similarly, volume of zinc, chromium, and nickel will be 1.378 , 0.869 , and 0.356 respectively.