Предмет: Математика, автор: gal4onok2601

Если масса раствора соли равна 4 кГ, то запиши формулу зависимости концентрации раствора от массы соли. По графику зависимости концентрации раствора Сот массы СОЛИ Т определи: 1. Если в растворе содержится 0,2 кг соли, то сколько процентов составляет его концентрация? 2. Сколько граммов соли должно быть в этом растворе, чтобы концентрация раствора составляла 20%?​

Ответы

Автор ответа: Pomoguvsem001
1

Ответ:

Надеюсь помогла))

Пошаговое объяснение:

Удачки вам!

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Vocabulary & Grammar
A Choose the correct item.
1
Your parents were with you during the summer, … ?
A were they B weren`t they C did they
2
You didn`t write a diary, … ?
A didn`t you B did you C were you
3
There are … states in the USA.
A fifty – two B fifty C forty – eight
4
The … is the longest river in the USA.
A Colorado B Mississippi C Missouri
5
There is … big river in this part of Scotland.
A another B other C others
6
Some people travel by train, … like travelling by car.
A another B other C others
7
After going to New York I`d like to see some … towns in the USA.
A another B other C others
8
My cousins … seen “The Big Apple”.
A has B have C hasn`t
9
Do you know how to make porridge? – I`m afraid I don`t. I`ve … done it before.
A yet B never C just
10 Is Frank at home? – Yes, he … just … back.
A has drove B has driven C has been driving
B Report what they said.
11 John said : “These days I usually have lunch in the nearby cafe.”
12 Jane said to Fred : “I always stay here when I am in Glasgow.”
13 Bob said: “ I am learning French.”
14 Fred said to Jack : “We have done a lot today.”
15 Ann said to Helen : “I worked at the factory last year.”
16 Alice said: “ I have been taking aspirin for three days.”
17 Tom said: “I will have an advantage over Bob.”
C Change the sentences in the active voice into passive.
18 John found a small silver box in the garden.
19 The girls did the exercises after class.
20 People don’t build tall buildings on this island.
21
We form the passive voice with the help of the verb to be.
22 They will make a discovery soon.
23 He won’t give you an official answer.
24 What poems do the students learn by heart?
Помогите,срочно! Даю 30 балов;)