Предмет: Химия, автор: aivish

сколько граммов 98%-ной серный кислоты потребуется для приготовления 2 кг 15%-ного раствора этой кислоты? Напишите плиз полное решение

Ответы

Автор ответа: AndesZar

0

Задача основана на пропорциях:
1) 2000грамм---100%
Х------------------15%
х=15*2000/100=300граммам(количество кислоты в р-ре)
2) Х---100%
300- 98%
х=300*100/98=306,122грамма серной кислоты потребуется

Автор ответа: aivish

0

спасибо большое!

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: mimimimimi243i

When Sally Ride was just 9 years old, her family toured Europe for entire year and then returned home to Encino, California. Once back at school, Sally wanted to be a winner in sports and at school. In her teens, she was a champion Junior Tennis Player. She was ranked number eighteen among the best young tennis players in the country when she was 18.

Sally always liked studying science. When she went to college, she studied astrophysics. Astrophysics is the science of stars and planets. She liked great literature too. She graduated from college with two degrees. The other degrees was in English. She stayed longer in college and become Dr. Sally Ride. She was a specialist in astrophysics.

Sally was interested in joining NASA as an astronaut. She was chosen as one of six women in the astronaut class in 1978. She studied at the Johnson Space Center in Houston, Texas. She learned how to fly military jets as part of her training.

In 1982 Sally Ride was selected to go on the second challenger space flight. She would be the first American woman to go into space. Sally ride spent six days in space orbiting the earth. Later Sally Ride said, “The thing that I’ll remember most about the flight is that it was fun. In fact, I’m sure it was the most fun that I will ever have fun in my life.”

1. Sally was_______ when she became one of the best young tennis players in the USA.

2. ______ is one of Sally Ride’s favourite subjects.

3. Sally was engaged in learning astrophysics in ________.

4. She was a specialist in________.

5. She learned to control _________in Houston.

6. Sally spent _________ in space flying around the earth.

ПОЖАЛУЙСТА ПОМОГИТЕ СРОЧНО

6 лет назад

Предмет: Алгебра, автор: pavelqwertyalenbatro

Упростите выражение: 2√х + 3√х - 5√х.

6 лет назад

Предмет: География, автор: Rontick

По рисунку определи вид загрязнения Мирового океана.

загрязнение радиоактивными веществами

загрязнение при проведении геологоразведочных работ

загрязнение во время добычи полезных ископаемых

загрязнение бытовыми отходами

6 лет назад

Предмет: Физика, автор: ПростоШкололо

Какое давление воды высотой 2 м на дно? Какая сила давления на дно площадью 2 кв.м и боковую стенку площадью 4кв. м ?

9 лет назад

Предмет: Математика, автор: Love2014

сколько всего можно составить четырёх значных чисел из цифр 0 и 1? цифры могут повторятся

9 лет назад