By the end of the 1880s, the introduction of lengths of celluloid photographic film and the invention of motion picture cameras, which could photograph an indefinitely long rapid sequence of images using only one lens, allowed several minutes of action to be captured and stored on a single compact reel of film. Some early films were made to be viewed by one person at a […]

A plant manufacturing nails and screws uses a large pool (volume = 10,000 L) to collect and treat its residual waste water before discharging it in a nearby stream.  The manufacturing process makes use of a strong acid (HCl) and a weaker one (phosphoric acid, H3PO4; pKa1 = 2.148, pKa2 = 7.20, pKa3 = 12.15), before discharging them in the pool for treatment (neutralization).  Once […]

Student 1 is titrating NaOH into HCl, the student pours 10.00 mL of 2 M HCl into an erlenmeyer flask and adds 2 drops of phenolphthalein indicator and 15 mL of deionized water. The student places the burette with NaOH inside of it above the acid solution and records that there are 30 mL of 1 M NaOH in the burette. The student turns the stopcock […]

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Discussion Topic 1: Chemistry In Its Element (Podcast):  There is a lot of chemistry going on all around you. If you start  to observe a bit more intentionally, you will notice many new discoveries, articles, news stories, and breakthrough research happening everyday. And science can only be useful and keep moving forward if it is shared.  For this topic, I want you to find a […]

Child abuse and maltreatment is not limited to a particular age and can occur in the infant, toddler, preschool, and school-age years. Choose one of the four age groups (infant, toddler, preschool, or school age) and discuss the types of abuse that are most often seen in this age. Discuss warning signs and physical and emotional assessment findings the nurse may see that could indicate […]

Write a research paper about one element from the periodic table of the elements. Select an element that you find interesting and tell the story of that element. In doing so, explain how the element relates to the elements around it in the periodic table and why the element is in that particular location on the table of elements. Below is a list of aspects […]

Write the balanced chemical equation for the reaction taking place in the flasks for part 1.  From the mass of KHP, calculate the moles of KHP used for each of 3 trials.  Using the moles of KHP in each flask, use stoichiometry to calculate the moles of NaOH that were used to reach the equivalence point in each flask.  Finally, calculate the molarity of your […]

Hey I need someone to create me a info-graphic thats related to the periodic table of elements.  I need someone who knows chemistry very well and knows a lot about the perodic table ( to be specific the element thallium. I need to create a info-graphic that includes the information from the pdf below. You should be able to complete everything the rubrics says and […]

Write the balanced chemical equation for the reaction taking place in the flasks for part 1.  From the mass of KHP, calculate the moles of KHP used for each of 3 trials.  Using the moles of KHP in each flask, use stoichiometry to calculate the moles of NaOH that were used to reach the equivalence point in each flask.  Finally, calculate the molarity of your […]