In carbon dioxide (co2), there are two oxygen atoms for each carbon atom. each oxygen atom forms a double bond with carbon, so the molecule is formed by two double bonds. two double bonds means that the total number of electrons being shared in the molecule is
a) two
b) four
c) six
d) eight

Option (D) is the correct answer.

Explanation:

The atomic number of carbon is 6 and atomic number of oxygen is 8. Therefore, there are 4 valence electrons in carbon and there are 6 valence electrons in oxygen.

Each carbon and oxygen atom shares 4 electrons to form one double bond. It is known that a molecule has 2 double bonds hence, there will be total sharing of 8 electrons.

Thus, we can conclude that two double bonds means that the total number of electrons being shared in the molecule is 8.

The correct answer is option D.

Explanation:

In carbon-dioxide molecule, there are two oxygen atoms and one carbon atom.

Sharing of two electrons between the atom give rise to single bond.

In single bond = 2 electrons

So, in a  double bond = 2 × 2 = 4 electrons

There are two doubles bonds in the carbon-dioxide molecule, so the total number of the electrons ebbing shared in the molecule is =

=4 electrons × 2 = 8 electrons

Hence,the correct answer is option D.

a basic solution is an aqueous solution containing more oh-ions than h+ions. in other words, it is an aqueous solution with a ph greater than 7. basic solutions contain ions, conduct electricity, turn red litmus paper blue, and feel slippery to the touch.

explanation:

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.