HEL
Match the chemical equations to the appropriate types of chemical reactions
1. 8Cu...
HEL
Match the chemical equations to the appropriate types of chemical reactions
1. 8Cu + S8-8 Cus (synthesis or decomposition reaction)
2. P4 +502-2P205 (synthesis or decomposition reaction)
3. BaCO3-BaO + CO2 (synthesis or decomposition reaction)
4. KCIO3—KCI + O2 (synthesis or decomposition reaction)
5. 8Fe + S8- 8Fes (synthesis or decomposition reaction)
6. H2CO3—H2O + CO2 (synthesis or decomposition reaction)
Answers: 3
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The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.
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Amixture initially contains a, b, and c in the following concentrations: [a] = 0.300 m , [b] = 1.05 m , and [c] = 0.550 m . the following reaction occurs and equilibrium is established: a+2b⇌c at equilibrium, [a] = 0.140 m and [c] = 0.710 m . calculate the value of the equilibrium constant, kc.
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