Question

При гидролизе вещества содержащего 18% сахарозы , получили 2,1 кг глюкозы. Определите массу вещества , если выход глюкозы состовляет 70% от теоретически возможного.

Answer 1

18-2.1(-это тире)

70- х

2.1*70:18 =147:18= 8.16

примерно так это прямо пропорциональная величина 

Answer 2

Calculation of the Mass of the Substance

To determine the mass of the substance, we need to use the information provided in the question.

According to the question, when a substance containing 18% sucrose undergoes hydrolysis, 2.1 kg of glucose is obtained. The yield of glucose is stated to be 70% of the theoretically possible yield.

To calculate the mass of the substance, we can use the following steps:

1. Calculate the theoretical yield of glucose: - Since the yield of glucose is stated to be 70% of the theoretically possible yield, we can calculate the theoretical yield by dividing the actual yield (2.1 kg) by the yield percentage (70%): - Theoretical yield of glucose = Actual yield of glucose / Yield percentage - Theoretical yield of glucose = 2.1 kg / 0.70 = 3 kg

2. Calculate the mass of the substance: - The mass of the substance can be calculated by dividing the theoretical yield of glucose by the percentage of sucrose in the substance (18%): - Mass of the substance = Theoretical yield of glucose / Percentage of sucrose - Mass of the substance = 3 kg / 0.18 = 16.67 kg

Therefore, the mass of the substance is approximately 16.67 kg.

Please note that the calculation assumes that the hydrolysis reaction is complete and that there are no other factors affecting the yield of glucose.