Covalent bonds form between hydrogen and oxygen atoms in a water molecule as a result of the:
a. viscosity of water.
b. polarity of water molecules.
c. transfer of electrons between atoms.
d. sharing of electrons between atoms.
e. surface tension of water.

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange

What is the main reason why some developing countries fear the increase the free trade policies around the world?

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?