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Calculate the pH of a 1.03 M potassium nitrite, KNO2, solution.
Which of the following acid-base pairs would work best for a laboratory experiment requiring a pH of 6.8? What molar ratios of the compounds would you use to prepare the solution?
a. 0.20 mol H2S / 0.13 mol HS-b. 0.13 mol H2S / 0.20 mol HS-c. 0.10 mol HCO3- / 0.26 mol CO32-d. 0.26 mol HCO3- / 0.10 mol CO32-
In Flask A, you reacted 1.65 g Mg with 0.136 mol HCl. In Flask B, you reacted 2.21 g Mg with 0.098 mol HCl. Which ballon will inflate the most?
what volume of Cl2 gas will be in a balloon after a 3.95 L sample at ATP is put into an oven set for 70.0 C
when a 50.0-g nugget of pure gold is heated from 35.0 C to 50.o C, it absorbed 5200.0J of energy. find the specific heat of gold.
An unknown gas composed of a diatomic molecule effuses at a rate that is only 0.355 times as fast as that of oxygen gas at the same temperature.
A 280- mL flask contains pure helium at a pressure of 757 torr. A second flask with a volume of 465 mL contains pure argon at a pressure of 715 torr.
Consider the following reaction: 2 HI(g) -> H2(g) + I2(g) If 3.55 moles of HI(g), 0.550 moles of H2, and 0.630 moles of I2 are at equilibrium in a 1.00 L container at 915 K
At equilibrium, it is found that .25 moles of COCl2 remain. What is the equilibrium concentration of CO?
What type of bonding between amino acid residues is most important in holding a protein and polypeptide in a specific secondary configuration?
When HSCN is added, you expect that the equilibrium will shift to the right and the reaction mixture will become darker (more orange).
how much energy is required to warm 100g of H2O from 20 degrees celcius to 80 degrees celcius if it is initially in a 140g glass flask? the specific heat of water is 4.18 J/g degree celcius.
What is the enthalpy of combustion of this fuel in kJ/mol? The specific heat capacity of water is 4.184 J/g-°C.
what is the equation for gypsum when it is heated below 220 degrees celsius and also when it is heated to red heat?
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