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Calculate the pH of
a) 0.30 mol/L of CaCl2
b) 1.45 mol/L of CaSO4
c) 2.61 mol/L of NH4HSO4
SHOW all work please!
A solution containing 27.05 mg of an unknown protein per 22.0 mL solution was found to have an osmotic pressure of 3.10 torr at 12 C. What is the molar mass of the protein
Calculate the molar mass of a gas if 4.40 g occupies 3.50 L at 560 torr and 41°C.
Explain how many grams of which reactant remains after the reaction of 15.0 g of MnO2 (86.9 g/mol) as well as 30.0 g of HCL (FW = 36.5 g/mol) according to the subsequent chemical equation
10 ml of .1 M phosphoric acid is titrated with .1M NaOH. After 10 ml of NaOH has been added the pH is 4 What is the ratio of H3PO4/H2PO4 - at this point
You have 135.8 mL of a 2.50, solution of Na2Cr04 (aq). You also have 125 mL of a 2.50 M solution of AgNO3. Calculate the concentration of Na+ after the two solutions are mixed together.
If the outer electron in a Sn- ion is removed by absorbing a photon of visible light having an energy of 3.776E-19 J, what is the amount of leftover energy that goes into the kinetic energy of the ejected electron
Water is about 15% denser than oil, What implications does this difference have on: An oil-based fire hazard such as burning oil slick, and cleaning up an oil spill.
Hard water at home contains dissolved ions (ex. Ca2+ & Mg2+) that react with soap to form a nasty gray substance. Because this gray stuff would ruin your clothes
A sample of oxygen gas that contains onehalf of Avogadro's number of molecules has a mass of
What volume of 0.300 N NaOH would be required to bring 16.0 mL of distilled water that has a pH 7.00 to a new pH of 12.42?
A sample contained a mixture of ZnS and HgS. The amount of ZnS was determined by reacting 11.06 g of the sample with an excess of HCl to release H2S from each compound; ZnS(s) + 2 HCl(aq) ® ZnCl2 + H2S(g) HgS(s) + 2 HCl(aq) ® HgCl2 + H2S(g) If the..
What are the potential sources of error for determining the molar extinction coefficient for methylene blue? Which sources contribute most to the uncertainty in the coefficient?
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