An oxide of aluminum contains 0.545 g of Al and 0.485 g of O. Find the empirical formula
for the oxide.

The answer is: Al2O3

Explanation:

The data they give us is:

To find the empirical formula without knowing the grams of the compound, we find it per mole:

Then we must divide the results obtained by the lowest result, which in this case is 0.02:

Since both numbers have to give an integer, multiply by 2 until both remain integers:

Now the answer is given correctly:

- decrease the number of plants and animals living in the water.

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .