A chemist (from Greek chēm (ía) alchemy; replacing chemist from Medieval Latin alchimista[1]) is a scientist trained in the study of chemistry. Chemists study the composition of matter and its properties. Chemists carefully describe the properties they study in terms of quantities, with detail on the level of molecules and their component atoms. Chemists carefully measure substance proportions, reaction rates, and other chemical properties. The word 'chemist' is also used to address Pharmacists in Commonwealth English.
Ethanol contains an alcohol group (-OH), which includes hydrogen bonding. Hydrogen bonding is stronger than other IMFs such as Van der Waals forces and Dipole-Dipole.
Ethene only has Van der Waals forces as it is an alkene with only C-H or C-C bonds. These means that the forces are not as strong.
Since ethanol contains hydrogen bonding, it will take a higher temperature in order to break these bonds, and thus results in a higher boiling point than ethene.
If you increase the temperature the air will try to expand. Since it is sealed and the air can't expand, it will apply higher pressure to the can because it will want to burst out. It works the other way around, if you cool it down it will lower the pressure.
Answer: B) explanation of why the pesticide is toxic to organisms.
Explanation:
Pesticide is a chemical or biological substance which is required to kill the population of pests and which are harmful and affecting the life cycle of the plants.
The structure of pesticide is required to be known so as to get information of the chemical or biological agent present in these pesticides. This can help in determining the fact that which ion or molecules directly cause harm to the body of pests by releasing the toxicity.