General Chemistry Answers

A quantity of gas occupies a volume of 548 mL at a temperature of 27 degrees C. What temperature (in Kelvin) will the volume of the gas be at 600 mL, assuming no change in pressure?

For Al-28, calculate a) the mass defect (use Table 18.4) and b) the binding energy in 

kJ/mol.

Natural way of food preservation has been part of the Filipino cuisine and food culture, this enables Filipino families to store food for future consumption and for “flavor enhancement”. However, since these preservation methods are done naturally (without preservative) the tendency of food spoilage is very high, and this has been a big concern in Natural Food Preservation. Now as a Filipino student, what proposition would you suggest in fixing this concern? And Which concept in General Chemistry II can be best applied to understand this phenomenon? Consider or relate the concepts in General Chemistry II in giving answers to the question.

Maria Christina Falls is a Plantita she makes sure that all her plants are well hydrated. One hot afternoon Christina noticed that one of her plants seems so dry and needs to be hydrated, so she decided to water that plant. However, later that she has noticed that the leaves of the plant she watered was wilted, and the plant eventually died. Now, what do you think is the cause of the plant death. Look closely in molecular level to identify and explain the reasons as to why it happens to Christina’s plant. Consider or relate the concepts in General Chemistry II in giving answers to the question.

By generations Filipinos prefer to use muriatic acid (HCl) to clean their toilet bowls, this is because by their observation it is said to be that muriatic acid exhibits stronger action than those of the new ones. Do you agree to this observation? Why and Why not? Consider or relate the concepts in General Chemistry II in giving answers to the question.

The Earth is rhetorically called the world of water. This is because 70 to 71% of the Earth surface is occupied with water. Our country the Philippines is surrounded with multiple bodies of water, then why is that despite of this, one of leading problem or crisis that the most communities are facing is water shortage, how can this be possible knowing that there is an abundance of water that surrounds our islands. What is the root of this? And What proposition would you suggest in alleviating suffering from this crisis? Consider or relate the concepts in General Chemistry II in giving answers to the question.

1.   Showers, also known as rain showers, have a shorter duration than rain. They tend to be quick and come in bursts. It is a common observation that when the sun comes out immediately after a rain shower, the puddles formed from the rain dries up faster than if it remains cloudy. Explain, on the molecular level, as to why this occurs. Consider or relate the concepts in General Chemistry II in

giving answers to the question.

Nitrogen gas can be prepared by passing gaseous ammonia over solid copper (II) oxide at high temperatures. The other products of the reaction are solid copper and water vapour. If 18.10g of NH3 is reacted with 90.40g of CuO

how many mL of H2SO4 are neutralized if it takes 28.03 mL of 3.55 M NaOH to neutralize a 0.25 sample of H2SO4

Calculate the standard entropy values for the following reaction at 25°

1.)N2(g)+3H2(g)---> 2NH3(g)

2.)H2(g)+Cl2(g)-----> 2HCl(g)

3.)2CO2(g)+O2(g)--->2CO2(g)

4.)3O2(g)--->2O3(g)

5.)2NH3(g)+CO2(g)---->NH2CONH2(aw)H2O(I)