Question 13 (5 points) (01.06 MC)
The gas carbon dioxide is a pure substance. Which of the following is true about carbon dioxide?

Options:

It can be separated into carbon and oxygen using physical methods.

Carbon and oxygen retain their original identity in it.

Carbon and oxygen are chemically bonded in it.

Explanation:

Sorry the guy asking forgot to put in the options so comment below the correct answer and brainy STOP DISABLING COMMENTS YOUR CAUSING SO MANY INCORRECT THINGS

the temperature of the gas, in k, not celsius.

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.