What type of substance do these statements describe?

- it is a long chain.
- it contains carbon, hydrogen, and oxygen atoms.
- it has double bonds.
- it is insoluble in water.
- it is used for energy storage in living things.

carbohydrate
lipid
monosaccharide
protein

Answer : The correct option is, Lipid.

Explanation :

Carbohydrate : It is the most common type of organic compound. It contain only carbon (C), hydrogen (H), and oxygen (O) atoms.

It is built of small repeating units that form bonds with each other to make a larger

molecule. It is a long chain. It is also used for energy storage in living things.

Generally, all the carbohydrates are soluble in in water.

Lipid : Lipids are organic compounds which contain carbon, hydrogen, and oxygen atoms. It consist of fatty

acids, with or without additional molecules. Fatty acids are the organic molecules that have the general

formula , where 'n' ranges from 2 to 28 and always an even number. It is a long chain.

All the lipids are insoluble in polar solvent like water but are soluble in non-polar solvents. It is also used for energy storage in living things.

Monosaccharide : It is defined as the small repeating units (monomers). A monosaccharide contains carbon, hydrogen, and oxygen.

The general formula for a monosaccharide is, , where n can be any number greater than two. For

example, if n is 6, then the formula can be written as, . This is the formula of glucose. It is soluble in water.

Protein : It is an organic compound which contain carbon, hydrogen, oxygen, nitrogen, and in some

cases sulfur. They are made up of small molecules called amino acids.

All the structures are shown below.

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

→

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.