Предмет: Химия, автор: artemovdienko228

Fe2+3H2SO4=3H2
Маса сульфатної кислоти 4,9
Визначте масу солі​

Приложения:

Ответы

Автор ответа: bima690302
1

Ответ:

4.9:98=0.05 моль

масса fe2(so4)3=400*0.025=10r

bima690302: все формулы есть в учебнике
bima690302: задача базовая
artemovdienko228: я учусь в колледже у нас нет учебников мы идём не по учебнику
bima690302: роза свеча
bima690302: m=M×n
artemovdienko228: спс
bima690302: M h2so4=98 r/моль
bima690302: n=4.9÷98=0.05 моль
bima690302: m Fe2SO43=M×n=400×0.05÷2=10
artemovdienko228: спс
Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Математика, автор: eva20063005
а×2=6 , 6÷х=3, 2×х=6, а÷2=3
2 года назад
Предмет: Русский язык, автор: panfilets535
Придумать предложение с устойчивыми словосочетаниями: сами с усами, в самый раз, сам не свой, иное дело.
Заранее спасибо!
2 года назад
Предмет: Английский язык, автор: Evglyk
Помогите что сможете
Прочитайте текст и выполните задания. В каждом задании обведите цифру 1,2, 3 или 4, соответствующую выбранному вами варианту ответа.

Sisters.

« Dear Kathy! Chance made us sisters, hearts made us friends.» This quote is at the center of a collage of photographs- covering our twenty- something years – that now hangs in my office. My sister, Susie, made it for me as a wedding present. It probably cost very little to make ( she is starving college student, after all), but it means more to me than any of the more « traditional» wedding presents my husband and I received from family and friends last June. Whenever I look at the collage, it reminds me of my sister and what a true friend she is.

Susie and I were not always close friends. We shared a room for nearly fifteen years when we were younger, and at the time I thought I could not have asked for a worse roommate. She was always around! If we argued and I wanted to go to my room to be alone, she’d follow me right in. If I told her to go away, she’d say right back, « it is my room. Too! And I can be here if I want to!»

When we were kids, she’d borrow my dolls without asking.. When we got older, Susie started borrowing my clothes. That was the final straw. I begged my parents to let me have a room of my own. The answer was always a resolution «no».

To crown it all, she had this habit of doing everything I did. There was no place where I was safe. « She looks up to you”, my mom would say. I didn’t care. I just wanted a piece of my life that didn’t involve my little sister. When I complained to my mother, she’d just smile and say, «one day you’ll want her around. »

It’s strange how mothers have their habit of being right about everything. When I was sixteen and my sister was thirteen, we went through a series of life- changing events together that would forever change our relationship. First, my parents announced that they were divorcing. My dad moved to an apartment in New Hampshire. He bought me my first car and I often went with Susie to his place. During those trips we started discussing our troubles and making plans about how to return the family again.

Yet those few months changed my relationship with my sister forever. We started having more heart- to- heart talks as opposed to silly fights. Over time, she became my most cherished friend.

Susie and I have shared so much. She’d been my roommate, my friend, and my partner in crime. We’ve done plays together, gone to amusement parks, sang, and taken long road trips together. Even though distance separates us now, we’re closer than ever. Sisters share a special bond. They’ve seen all of your most embarrassing moments. They know your deepest, darkest secrets. I’m lucky to be able to say that my little sister is my best friend. I only wish everyone could be so
Задание 1
1.Why is the collage of photographs more important for Kathy than the other wedding presents?

A) It reminds Kathy of her wedding.

B)Kathy didn’t like the other wedding presents.

C)It was the most expensive present.

D) Kathy’s sister made it for her.

2. Why was Kathy against sharing a room with her sister?

A)They always quarreled.

B)Susie never left her alone

C)They were of different age.

D)Susie said it was her own room.

3. What did Kathy call the last straw in paragraph 3?

A)The fact that Susie often borrowed Kathy’s toys.

B)The fact that Susie never asked for the things she borrowed.

C)The fact that Susie began to wear Kathy’s clothes without her permission.

D)The fact that Susie broke all her toys she played with.

4. What was Kathy’s greatest wish that she mentions in paragraph 4?

A)To have a separate life from her sister.

B)To live in peace and safety.

C)To never part with her sister.

D)To have the same hobbies as her sister.

5. When did the relationship between Susie and Kathy start to change?

A) When they moved to a new house.

B) After their father married for the second time.

C)After their parents divorced.

D) When Kathy’s father bought her a car.

6. What are Kathy’s relationships with Susie now?

1) They hate each other.

2) They are close friends.

3) They are busyness partner.

4) They don’t see each other.

7. Why do the sisters understand each other?

1) They have got the same hobbies.

2) They have similar sense of humor.

3) They love each other very much.

4) They have similar life experience.
2 года назад
Предмет: Химия, автор: matuxh
Химия 9 задание дам 30 балов
9 лет назад
Предмет: Физика, автор: ruvor26
Электромобиль двигался 10 часов подряд,при этом мощность его двигателя была 10 кВт.Сколько времени потребуется для его зарядки от обыкновенной электрической розетки?полученный результат выразить в часах и округлить до целых.Сила тока-10 А,напряжение 220 В
9 лет назад