Как найти массовую долю n2o3

• Относительная молекулярная масса N2O3: 76.0116
• Молярная масса N2O3: 76.0116 г/моль (0.07601 кг/моль)

Расчёт молярной и относительной молекулярной массы N2O3

• Mr[N2O3] = Ar[N] * 2 + Ar[O] * 3 = 14.0067 * 2 + 15.9994 * 3 = 76.0116
• Молярная масса (в кг/моль) = Mr[N2O3] : 1000 = 76.0116 : 1000 = 0.07601 кг/моль

Расчёт массовых долей элементов в N2O3

• Массовая доля азота (N) = 28.0134 : 76.0116 * 100 = 36.854 %
• Массовая доля кислорода (O) = 47.9982 : 76.0116 * 100 = 63.146 %

Калькулятор массы

Напишите мини-сочинение на тему школьных дней (на английском), по плану вступление,преимущества(школы),недостатки(школы),итог. Используя данные выражения: Some of the advantages:

to become smarter, to develop your mind, to take part in school activities, to have good sports facilities, to have good and experienced teachers, to have interesting school traditions, to develop your imagination, to study interesting subjects, to learn new things, to prepare for adult life, to have a lot of friends, to enjoy school life and friendship…

Some of the disadvantages:

not to need so much knowledge, to have no time for sports and hobbies, to get up early in the morning every day, to be tired of doing homework, to work too hard, not to be allowed to do what you want to, to have boring lessons, to be afraid of some teachers, to have too many extra subjects, to worry about getting good marks, to have many tests, school has nothing to do with real life…