Предмет: Химия, автор: ohfyk

Химия
Может кто то сможет помочь

Приложения:

Ответы

Автор ответа: nikolaygr
1

Відповідь:

M(NaCI)=58,5г/моль

V(р-ра)=500мл=0,5л

C(NaCI)=1моль/л

х-число молей NaCI в растворе

 1  - 1

0,5- x

x=21*0,5/1==0,5моль

m(NaCI)=0,5*58,5=29,5г=29г

Пояснення:

Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: История, автор: vitalinabuzun2012
Б. На яких основних принципах базується демократична держава? Хто бере участь у народних зборах? Як відбувається голосування: таємно чи відкрито?​
2 года назад
Предмет: Английский язык, автор: Abybandit694
Grammar test for the II semester 1. Make the following sentences interrogative: 1. My sister has bought a pair of nice model shoes this month. 2. All the children had returned for the country by the first of September. 3. They will have had dinner by 5 o'clock. II. Choose the right variant: 1. Your food the 8th form a) is still being prepared b) is being prepare c) has still been prepared 2. The event before they arrived home. b) had been reported c) was being reported published 5. -When ? a) reported 3. The new equipment the company. a) ordered b) ordered by d) has been ordered by 4. The Guinness Book of Records a) first published b) has first been published c) was first published d) were first c) ordered was in the 50's. b) be used - In 1950. a) are you born 6. We hope that an a) was arrived 7. Computers can a) use III. Choose the right variant: 1. b) Might you help me with the washing up, please? a) Could c) Should d) Must 2. _use your telephone, please, Mr. Taylor? a) May I b) Should I c) Do I have to drive a car when you're b) are able to 3. In Britain you a) must c) ought to 4. Susan left before the end of the film. She a) had to c) might b) must d) could 5. What ... I to do? Something has to be done about this affair! a) must b) am c) should d) may b) were you born c) have you been born agreement_ b) arrived c) will be arrived at in many fields. c) have used 2022-2023 d) is used d) Must I 6. You... help her. She is your close friend. a) ought b) may c) should d) have 7. ... you have another cup of tea? No, thank you. a) Need b) May c) Won't d) Must seventeen. d) are allowed to go home early. d) will prepare yet d) has been reported d) did you born d) will arrive​
2 года назад
Предмет: Русский язык, автор: ksenyashel24
3. Составь из слов предложения. Что для этого необходимо сделать? Чем предложение отличается от набора слов? - Беспомощные, нуждались, зверьки, в, ежедневный, уход. О Младшие, школьники, за, стали, ухаживать, живот- ные. В, появились, школьный, живой, уголок, новые, питомцы. Благодарные, радовались, зверюшки, приход, дети. 55 помогите пж​
2 года назад
Предмет: Математика, автор: asemka0801
какая из пар чисел (2,5) (2,0) является решением уравнения 5х-у=10 ПРОШУУУ​
8 лет назад
Предмет: Алгебра, автор: stesharokha
Запиши данный одночлен 1,44с4 в виде квадрата некоторого одночлена
8 лет назад