practice questions for bio

An ion with six protons, seven neutrons in a charge of 2+ has an atomic number of ——-

Six

Which pair of elements is most likely to react if bought together

Sodium and chlorine

The large diversity of shapes of biological molecules is possible because of the extensive presence of—— in the molecules

Carbon

Research indicate that ibuprofen a drug used to relieve inflammation and pain is a mixture of two enantiomers. What are enantiomers

Molecules that are mere images of each other

How do isomer differ from one another?

Isomers is different in the arrangement of bonding of atoms

Many of waters emergent Properties such as the cohesion high specific heat and high heat of vaporization from the fact that water molecules——

Are attracted to each other by particle negative and positive charges on the oxygen and hydrogen atoms respectively

What kind of bonds are responsible for the unique cohesion surface tension and adhesion properties of water molecules

Hydrogen bonds

Which of the following statements correctly, describe the property of hydrophobic substance such as vegetable oil

Nonpolar substances that repel water molecules

We can be sure that a mole of tablespoon sugar in a mole of vitamin C are equal in there

Number of molecules

What property of water allows a water strider to walk on water

Water is high surface tension