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A mixture of KBr and NaBr weighing 0.560 gm was treated with aqueous Ag+ and all the bromide ion was recovered as 0.970 gm of pure AgBr. What was the fraction by weight of Kbr in the original sample?
Determine the mass, of: a.30.0 mL of the liquid propylene glycol, a moisturizing agent for foods,
A small bubble rises from the bottom of a lake, where the temperature and pressure are 8ºC and 6.4 atm, to the water's surface, where the temperature is 25ºC and pressure is 1.0 atm.
Balance the following molecular equations for these reactions. Write the ionic equation for the reactions. Write the net ionic equation for the reactions.
A tank of 10 m3 volume contains an ideal gas (CP=30 J/mol-K) at T=298 K and P=5 bar. If gas from the tank is allowed to flow through a reversible device and exhaust to the atmosphere at P=1 bar.
An industrial vat contains 2,500 liters of an acidic aqueous solution with a pH of 3.5. How many grams of NaOH need to be added to raise the pH to 4.3?
Stellar nuclear fusion begins with 1H and ends with 56Fe. Younger stars fuse hydrogen to form 4He, while older, more massive stars fuse helium to form heavier elements.
A 370. mL air sample collected at 35°C has a pressure of 550. torr. What pressure will the air exert if it is allowed to expand to 425 mL at 49°C.
A 2.32-L vessel contains 4.49 g of a gas at 1.08 atm and 26.9°C. What is the density of the gas in g/L?
Chlorine has an average atomic mass of 35.453 amu. The main isotopes of chlorine are 35Cl which has an atomic mass of 34.968 amu and 37Cl, which has an atomic mass of 36.956amu. Given this, what is the percent abundance of each isotope in natural ..
If 4.00 g of the unknown compound contained 0.133 mol of C and 0.267 mol of H, how many moles of oxygen, O, were in the sample?
Calculate the molar mass of a gas if 4.40 g occupies 3.50 L at 560 torr and 41°C.
You are given the following data. S(s) + 3/2 O2(g) → SO3(g) ΔH = -395.2 kJ 2 SO2(g) + O2(g) → 2 SO3(g) ΔH = -198.2 kJ Calculate ΔH
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