General Chemistry Answers

Phenol(C6H5OH) is commonly used to make a buffer with Sodium Phenolate (C6H5ONa) . Given that the Ka = 1.29*10^-10, and a buffer was created with 0.25g of Phenol and 0.50g Sodium Phenolate. Determine the pH after the addition of 2mL of 0.10M HCI.

The number of protons in the piece of sodium (density 0.971 g/cm3) is equal to the number of electrons in a piece of osmium. The volume of Os is 19 times lower than the volume of Na. Find the 

density of osmium.

In a galvanic cell the cathode (positive electrode) has been kept at standard conditions (1M), and the concentration of the anode has been increased (0.25M to 1.25M). The cell potential decreases as the concentration of the anode is increased. How can this be explained in terms of equilibrium?

given the reaction -> C7H16(g) + 11O2(g) ® 7CO2(g) + 8H2O(g) a) If 5.0 L of C7H16 are burned, what volume of oxygen gas is required? (measured under the same conditions) b) If 500 g of CO2 are formed, what weight of C7H16 was burned?

The element that causes burns to skin that heel slowly.

As a Ministry of Environment environmental technician, you are sent to take water for testing. Two of the test sites experienced fish kills and a third, without a fish kill, was used as a comparison site. In an attempt to explain why the fish died at these sites, the water was analyzed for the following chemicals: Location of sample sites: Your job is to provide an analysis of the test results to come up with a hypothesis for the experienced fish kills. Site A did not experience any fish kills and is used as a reference site.

s. Your task is to find one government initiative to help save some aspect of the Earth's environment. It can be local, provincial, or federal. Have you ever heard of this program? You will report on your findings and explain what you, as a student, could do to get involved with this initiative. Is there any way this could be more publicly successful?

How many grams of glucose, Co H12 O6 would you need to prepare 2.0 1 of 2 % glucose solution?

V1 = 0.55L, P1 = 740mmHg, V2 = 0.80 L, P2 =

Grace need to prepare a sulfuric acid solution using acid and distilled water. However, there is no distilled water left on the laboratory. Marie suggested to use the running water from the faucet, but Grace declined. Grace insisted that tap water should not be used in preparing solutions. Explain the basis of Grace's claims.