Category: Chemistry

How many Butterfinger Crisp can be obtained by trading 50 Jelly Belly Caramel Corn?

Posted on | by Kelvin

If you have 50 Jelly Belly Caramel Corn how many Butterfinger Crisp can be obtained via trade, if your friends have agreed on the exchange rate below? This is a practice mathematical exercise so it is OK to end up with partial bars. Also, express your answer in scientific notation with three significant figures.

8 Gummi Banana Straberry Ring can be traded for 2 M&M Peanut Butter
24 Jelly Belly Caramel Corn can be traded for 9 Gummi Banana Straberry Ring
9 Butterfinger Crisp can be traded for 10 M&M Peanut Butter

 

Integrating STEM Standards Across Content Areas: A Focus on Georgia State Standards

Posted on | by Kelvin

 

It is important to consider how skills that students learn and practice in your classroom can support them in other content areas. In doing this, you must be familiar with other content area standards. Research one or more of the Georgia state/national standards for a STEM content area other than the one you plan to teach. How can you include standards from this content area in your lesson plans? What are the potential benefits of doing this? Provide an example of a standard from another STEM content area you could include in one of your lessons.

 

Research on Oxygen

Posted on | by Kelvin

 

OXYGEN is the element

you can visit these suggested websites to discover intriguing information about various elements.

The Sceptical Chymist: In Your Element RoundupLinks to an external site.
Periodic VideosLinks to an external site.: ( a closed-captioned playlist of all the elements in orderLinks to an external site.can be found on YouTube under Periodic Videos’ Playlists)
National Institute of Health (NIH): PubChemLinks to an external site.
Royal Society of Chemistry (RSC): Periodic TableLinks to an external site.
For your initial post, answer all the following questions as part of your initial post:

Present three intriguing scientific facts about your chosen element, supported by credible academic sources.
How does the electron configuration of your element contribute to its position in the periodic table and its chemical behavior?
Explore the natural occurrence and abundance of the element. Where is it commonly found in nature? Are there any specific regions or geological formations known for containing significant amounts of this element?
Have you encountered this element in your daily life, work, or studies? How has it influenced your perception or understanding of the natural world?

 

 

Investigating pH in Acid-Base Solutions

Posted on | by Kelvin

1. 10 mL of M HCl solution is mixed with 150 mL of water to make a new HCl solution. What is the pH of the resultant solution? Justify your answer.

2. Let’s prepare an H2SO4 solution by dissolving 4.9 grams of H2SO4 in 100 mL of water.
a. How many H2SO4 molecules are in this solution?
b. What is the molarity of the solution?
c. What is the pH of the solution?
d. What is the pH of the solution if 3.0 grams of NaOH are added to the solution?
Note: Sulfuric acid (H2SO4) is a diprotic acid. The dissociation constant of the first proton (H+) is significantly larger than the second H+ dissociation. So, the pH of such a solution is mainly contributed by the first proton dissociation, while the second proton dissociation will provide some modification to its pH value. If you haven’t learned polyprotic acids yet, consider one H+ dissociation is enough to be awarded full credit.