thuthao27072k5 thuthao27072k5

19-09-2021
Chemistry

contestada

Bài 1. Có 30g dung dịch NaCl 20%. Tính nồng độ % dung dịch thu được khi
a. Pha thêm 20g H2O
b. Cô đặc dung dịch để chỉ còn 25g.

Respuesta :

Аноним Аноним

19-09-2021

Answer:

Bài 1. Có 30g dung dịch NaCl 20%. Tính nồng độ % dung dịch thu được khi

a. Pha thêm 20g H2O

b. Cô đặc dung dịch để chỉ còn 25g.

Answer Link

Otras preguntas

Foods that contain mainly fat and/or sugar and have little or no nutritional value, such as ice cream and soda, are said to consist of a. empty calories. b. n

When you tap or click the enter box to complete an entry in a cell, the active cell moves down to the next cell in the same column.?

Solve the system by elimination.. x+5y-4z=-10. 2x-y+5z=-9. 2x-10y-5z=0. . a.) (5, –1, 0). b.) (–5, 1, 0). c.) (–5, –1, 0). d.) (–5, –1, –2).

Which of the following postulates states that a quantity must be equal to itself?. . A. symmetric. B. identity. C. reflexive. D. closure

Name the colony that did not vote to accept The Declaration of Independence..-.-.-.-.-.--.-.-.-.-.-.-.-..-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.a.Massachusetts

Write the quadratic function f(x) = x2 - 5x + 3 in vertex form.

Find the area of a triangle whose base is 2 3 in. and height is 3 3 in.

What kind of boundary is seen in earthquakes that are caused by normal faults?

An investor would like to invest $60,000 in 2 stocks from a list of 6 suggested by a broker. How many investments of $30,000 each are possible?

Which, if any, of the following statements about electric field lines is/are true?