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what is the hydrogen ion concetration of a solution that has a pH of 4.7
a) 2 x 10^ -5 Mb) 1 x 10^ -4 Mc) 4Md) 9.3 M
A solution is made by dissolving 0.100 mols of NaOCl in 100.0 mL of water. The Ka of hypochlorous acid (HClO) is 3.0*10^-8 at 25.0 degrees C.
A gas mixture contains 1.30g N2 and 0.95g O2 in a 1.57-L container at 22 degrees Celsius. Calculate the mole fraction of N2.
At constant pressure and 25 degrees celcius a sample of gas occupies 4.5 liters. At what temperature will the gas occupy 9.0 liters?
Data Table: Mass MgO: 2.8045g initial temperature(°C): 24.99°C final temperature(°C): 25.00 °C Calculate the number of moles of MgO used in the reaction. The molar mass of MgO is 56.305 g/mole.
Question about States of Matter, Ian eats too many mars bars. To try to get rid of the excess kJ's he exercises in the gym by using a weights machine which works by compressing a cylinder of gas.
Calculate the normality of a KMnO4 solution if 32.38 mL of a 0.1431 N Fe2+ solution is required to react with 15.92 mL
If you have a sample of a gas at 25.0 oC and at a pressure of 4.5 atm, what will the pressure be if the temperature is raised to 50.0 oC?
If 3 moles of NaCl are needed to produce 1 mole of AlCl3, how many grams of NaCl are needed to produce 200 grams of AlCl3? Show all of your work/calculations.
What stretches (presence and absence) will distinguish the product (cyclohexene) from the starting material (cyclohexanol)? Give the functional group and wavenumbers
Sulfur-38 has an atomic mass of 38.0 and a half-life of 2.87 hours. How long will it take for 99.99% of a sample of sulfur-38 to decay.
A 25.00mL portion of 0.00923M NaOH (MM 40.00g/mol) was introduced into the solution of H2SO4 (MM 98.08g/mol), then the excess was back titrated with 13.33mL of 0.01007M HCl (MM 36.46g/mol). Calculate the parts per million of sulfur in the sample.
How many grams of potassium chloride will be generated on decomposition of 225 grams of potassium chlorate?
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