Blog

Upload Your Work Please take a picture of each page of your worked-out responses. Make sure that all handwriting is legible and that each question number is written clearly. Save your file with your last name in the file name. Upload the document here.

The number of calories in 3.0 g of glucose (blood sugar) is listed as 10.0 cal. If 15.0 g of glucose is reacted in a calorimeter, such that all of the energy is released and captured in a 1,000.00-gram water bath surrounding the calorimeter, what is the expected final temperature of the water following the reaction if the initial water temperature is 21.0°C? The specific heat of water is 4.18 J/g °C or 1.00 cal/g °C. Work out the problem on a separate piece of paper and upload a photo of your response at the end of the test. Please mark the problem clearly and show your work. Enter your answer in the text box below.

At a constant temperature of 971°C or 698 K, the value of the equilibrium constant K for this reaction is 1.84 x 10−2. At this temperature, which is favored: the reaction product, or the reactant? In other words, does the equilibrium point lie closer to the products or reactants side of the reaction equation? Briefly justify your answer.

If 100.0 mL of a 0.5 M aqueous solution of HCl is diluted to a final volume of 500.0 mL, what is the concentration of the diluted solution?  Work out the problem on a separate piece of paper and upload a photo of your response at the end of the test. Please mark the number of the problem clearly and show your work. Enter the concentration in the box below.   Answer _____________ M

Written Response General Guidelines: Express all numerical answers to the proper number of significant figures. You must show your work for full credit.

If a 4% starch solution and a 10% starch solution are separated by a semipermeable membrane, which of the following is true?

Answer the following questions using the simplified solubility rules below: Cations that are always soluble: Compounds of Group 1 cations (Na+, K+, etc.) and ammonium (NH4+) Anions that are always soluble: Nitrate (NO3−) Halides: Compounds of the halides (Cl−, Br−, I−) are soluble except for silver(I) (Ag+) and lead(II) (Pb2+). Sulfate: Compounds of sulfate (SO42−) are soluble except for Group 2 cations (Ca2+, Sr2+, Ba2+) and lead(II) (Pb2+). Everything else: Most other compounds not listed as soluble in rules 1–4 are assumed to be insoluble.

The value of the universal gas constant is 0.082 (L atm)/(mol K) or 8.31 J/(mol K) and 1.00 atm = 760 mmHg or 760 torr. When a sample of H2O2 is decomposed, 350 mL of O2 gas is collected at 20°C and at a partial pressure of 695 torr. How many moles of O2 gas were collected? Work out the problem on a separate piece of paper and upload a photo of your response at the end of the test. Please mark the problem clearly and show your work. Enter your answer in the text box below.

If a tray of ice is left in a freezer for a long time, the ice cubes gradually become smaller. This process is called ___________.

A tank contains a mixture of neon, argon, and helium. The total pressure in the tank is 490 mmHg or 0.645 atm. The partial pressure of helium and argon are 0.28 atm and 0.13 atm, respectively. What is the partial pressure of neon?