What is the percent abundance of each isotope
Silver has two stable isotopes with masses of 106.90509 amu and 108.9047 amu. The average molar mass of silver is 107.868 amu. What is the percent abundance of each isotope?
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Determine angle A to the nearest tenth of a degree when sin A =0.4552
A 0.130-mole quantity of NiCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Ni2 ions at equilibrium. Assume the formation constant* of Ni(NH3)62 is 5.5 × 108.
Determine the balanced chemical equation for this reaction. CaH18(g) + O2(g) > Ca2(g) + H2O(g) Enter the coefficients for each compound in order, separated by commas
Consider 4.90 L of a gas at 365 mmHg and 20. degrees celisus . If the container is compressed to 3.00 L and the temperature is increased to 40.degrees celisus , what is the new pressure, P2, inside the container
897.4 grams of sodium sulfide reacts with excess nitric acid. What volume of H2S gas is produced if the reaction is carried out at 760. Torr and 298 K?
Which catalysts are used for the polymerization of Tetraflouroethene to form Teflon. And for the Polymerization of isoprene to form Rubber.
Write the overall balanced equation of potassium permanganate with sodium oxalate in acidic solution using the half reaction method. Indicate the oxidation states for each species as well as the oxidizing agent and reducing agent.
When 2.45g of an unknown weak acid (HA) with a molar mass of 85.0g/mol is dissolved in 250.0g of water, the freezing point of the resulting solution is -0.258 degrees C. Calculate Ka for the unknown weak acid.
Aluminum reacts with oxygen to yield aluminum oxide. If 5.0g of AL reacts with 4.45g of oxygen what is the empirical formula of aluminum oxide
A 1.885g solid sample containing some FESO4 is dissolved in water. The resulting solution is acidified and titrated to the endpoint with 20.48 mL of 0.02540 M K2Cr2O7. What is the percent iron(II) sulfate in the solid sample?
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