(b). Urea (NH2CONH2) is the end product in protein metabolism in animals. The decomposition of urea in 0.1 M HCI occurs according to the reaction below. NH₂CONH2 (aq) + H*(aq) + 2H₂O (1)→ 2NH4+ (aq) · + HCO3- (aq) The reaction is first order in urea and first order overall. When [NH₂CONH2] = 0.300M, the rate at 51.05 °C is 7.56 x 10-5. (i). Determine the rate constant, k? (ii). Calculate the concentration of urea in this solution after 4.00 X 10³ s if the starting concentration is 0.400 M. (iii). Calculate the half-life for this reaction at 51.05 °C.

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(b). Urea (NH2CONH2) is the end product in protein metabolism in animals. The
decomposition of urea in 0.1 M HCI occurs according to the reaction below.
NH₂CONH2 (aq) + H*(aq) + 2H₂O (1)→ 2NH4+ (aq) + HCO3- (aq)
The reaction is first order in urea and first order overall.
When [NH₂CONH2] = 0.300M, the rate at 51.05 °C is 7.56 x 10-5.
(i). Determine the rate constant, k?
(ii).
Calculate the concentration of urea in this solution after 4.00 X 10³ s if
the starting concentration is 0.400 M.
(iii). Calculate the half-life for this reaction at 51.05 °C.
(c). The volume of gas at 25°C and 1.00 bar adsorbed on the surface of 1.75 g of
a sample of silica at 0°C was 1.52 cm³ at 55.4 kPa and 2.67 cm³ at 108 kPa.
Calculate the value of Vmon.
Transcribed Image Text:(b). Urea (NH2CONH2) is the end product in protein metabolism in animals. The decomposition of urea in 0.1 M HCI occurs according to the reaction below. NH₂CONH2 (aq) + H*(aq) + 2H₂O (1)→ 2NH4+ (aq) + HCO3- (aq) The reaction is first order in urea and first order overall. When [NH₂CONH2] = 0.300M, the rate at 51.05 °C is 7.56 x 10-5. (i). Determine the rate constant, k? (ii). Calculate the concentration of urea in this solution after 4.00 X 10³ s if the starting concentration is 0.400 M. (iii). Calculate the half-life for this reaction at 51.05 °C. (c). The volume of gas at 25°C and 1.00 bar adsorbed on the surface of 1.75 g of a sample of silica at 0°C was 1.52 cm³ at 55.4 kPa and 2.67 cm³ at 108 kPa. Calculate the value of Vmon.
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