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A 1 gram sample of calcium was burned in chlorine to give a 1.95 g sample of pure CaCl2. the energy given off in this reaction was 30.3 kJ. given this information, find the heat of formation of 1 mol of CaCl2
Name a method or physical process that can be carried out that would achieve the removel of ammonium chloride from your sample without affecting the other fous components. Describe what is happening in this process.
why metal sulfide compounds can only form after the hydrothermal fluids escape into the open seawater.
In an earlier problem we described the reaction of ammonia with oxygen to form nitrogen monoxide, NO.
time 0.0.184200.0.129500.0.069800.0.0311200.0.0191500.0.016what is the insataneous rate at
Calculate the mass of ammonium chloride that must be added to 500.0 mL of 0.32 M NH3 to prepare a pH 8.50 buffer; Kb for NH3 is 1.8 × 10-5.
Calculate the wavelength of light that is produced when the excited electron relaxes back tro ground state. givien sodium is the excited element
a gas mixture with a total pressure of 770 mmHg contains each of the following gases at the indicated partial pressures: CO2, 122 mmHg; Ar, 209 mmHg; and O2, 191 mmHg. The mixture also contains helium gas. what is the partial pressure of the heliu..
Given that the density of solid sodium is 0.968 g/cm^3, estimate the atomic (metallic) radius of a Na atom. Assess the value obtained, indicating why the result is only an estimate and whether the actual radius should be larger or smaller than the..
which of the following ethers has the highest boiling
Cassify these compounds by whether they behave as strong acids, weak acids, strong bases, or weak bases in aqueous solution.
How many grams of methane [CH4(g)] must be combusted to heat 1.00 kg of water from 25.0°C to 90.0°C, assuming H2O(l) as a product and 100% efficiency in heat transfer?
a student begins a kinetics experiment with a solution containing 0.050 starch. at time zero t 0.00 min the student
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