Question

Анна положила в стакан чая 4 ложки сахара, а Денис 5 ложек. Масса воды в стакане 150 г, масса сахара в одной чайной ложке 5 г. Масса раствора у Анны (граммы) Массы раствора у Дениса (граммы) Массовая доля сахара у Анны (%) Массовая доля сахара у Дениса (%) СРОЧНО!​

Answer 1

4*5=20

150+20=170

20*100/170==11,76%

5*5=25

150+25=175

25*100/175==14,28%

Answer 2

Calculation of Solution Mass for Anna and Denis

To calculate the solution mass for Anna and Denis, we need to consider the mass of water and the mass of sugar added by each person.

Given information: - Anna added 4 teaspoons of sugar. - Denis added 5 teaspoons of sugar. - The mass of water in the cup is 150 grams. - The mass of sugar in one teaspoon is 5 grams.

To calculate the solution mass for Anna, we need to add the mass of water and the mass of sugar she added: - Mass of water added by Anna: 150 grams. - Mass of sugar added by Anna: 4 teaspoons * 5 grams/teaspoon = 20 grams.

Therefore, the solution mass for Anna is 150 grams (water) + 20 grams (sugar) = 170 grams.

To calculate the solution mass for Denis, we need to add the mass of water and the mass of sugar he added: - Mass of water added by Denis: 150 grams. - Mass of sugar added by Denis: 5 teaspoons * 5 grams/teaspoon = 25 grams.

Therefore, the solution mass for Denis is 150 grams (water) + 25 grams (sugar) = 175 grams.

Calculation of Sugar Mass Fraction for Anna and Denis

To calculate the sugar mass fraction for Anna and Denis, we need to divide the mass of sugar by the total solution mass for each person.

Sugar mass fraction for Anna: - Mass of sugar added by Anna: 20 grams. - Solution mass for Anna: 170 grams.

Sugar mass fraction for Anna = (Mass of sugar added by Anna / Solution mass for Anna) * 100% = (20 grams / 170 grams) * 100% = 11.76%.

Sugar mass fraction for Denis: - Mass of sugar added by Denis: 25 grams. - Solution mass for Denis: 175 grams.

Sugar mass fraction for Denis = (Mass of sugar added by Denis / Solution mass for Denis) * 100% = (25 grams / 175 grams) * 100% = 14.29%.

Therefore, the sugar mass fraction for Anna is 11.76% and for Denis is 14.29%.

Please note that the calculations provided are based on the given information and assumptions made.