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Four of the boxes in the following periodic table are colored. Which of these are metals and which are nonmetals? Which one is an alkaline earth metal? Which one is a noble gas?
State the structure of a different product that could have been formed if you utilized ethanol containing substantial amount of water instead of the absolute ethanol utilized in the reaction of bromotriphenylmethane with ethanol
2C8H18 + 25O2 = 16CO2+18H2O : DELTA HEAT= -10942 KJ, calculate the mass of octane that must be burned to produce 12MJ of heat
The dilution of the buffer should not change the pH of the buffer by very much. Explain why not.
A solution is made by combining 15.0 mL of 18.0M acetic acid with 5.50g of sodium acetate and diluting to a total volume of 1.50 L. Calculate the pH of the solution.
A solution of ethyl acetate and sodium hydroxide was prepared at t=0 at 5*10-3 mol/L ethyl acetate and 8*10-3 mol/L of sodium hydroxide. After 400 second at 25 deg.c, 25ml of aliquot was found to neutralize 33.3ml of 5*10-3 mol/L of HCl. What is the ..
Which net ionic equation best represents the reaction (if a reaction occurs) between CaCO3 + HNO3 a. Ca2+ + 2NO3- ? Ca(NO3)2 b. CaCO3 + 2NO3- ? Ca(NO3)2 + CO32- c. CO32- + 2HNO3 ? H2O + CO2 + 2NO3- d. CaCO3 + 2H+ ? Ca2+ + H2O + CO2
Express the concentration of a 0.0860 M aqueous solution of fluoride, F-, in mass percentage and in parts per million (ppm). Assume the density of the solution is 1.00 g/mL.
Calculate the molarity of a solution made by adding 23.9 mL of concentrated potassium hydroxide (34.5 % by mass, density 1.46 g/mL) to some water in a volumetric flask
From the same container under the same conditions--same temperature and initial pressure, it takes 385 s for 7.00 L of O2 gas to effuse. Calculate the molar mass (in grams/mol) of the unknown gas.
What is the wavelength of light emitted when an electron in a hydrogen atom undergoes a transition from energy level n=4 to n=2?
a closed vessel contains water oil and air at room temp. if the system is synthesized by first adding the water and
0.1M HCl is added into a mixture of 25mL of water and 25mL of Ca(OH)2. For the end point to be reached 1.5mL of 0.1M HCl is added into the mixture
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