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koban [17]
3 years ago
10

Dung dich NaCl 0.9% có 0.9g NaCl trong 100 mL dung dịch

Chemistry
1 answer:
Alenkasestr [34]3 years ago
8 0

Answer:

Explanation:  Độ thẩm thấu của NaCl 0.9% và glucose 5% lần lượt là 308 và 278 ... Dung dịch natri clorid sử dụng trong pha thuốc tiêm truyền thường dùng

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Snezhnost [94]
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3 0
3 years ago
A reaction produces 92.50 g FeSO4. How many grams of CuSO4 are necessary for this to occur?
xxMikexx [17]

Fe+CuSO4⟶Cu+FeSO4

Given that  

FeSO4 = 92.50 g  

Number of moles = amount in  g / molar mass

=92.50 g / 151.908 g/mol

=0.609 moles FeSO4

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0.609 moles FeSO4 * 1 mole CuSO4 /1 mole FeSO4

= 0.609 moles CuSO4

Amount in g = number of moles * molar mass

= 0.609 moles CuSO4 * 159.609 g/mol

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3 0
4 years ago
Read 2 more answers
Ocean water contains 3.5% NaCl by mass. How many grams of sodium chloride can be obtained from 750 g of seawater
Masteriza [31]

26.25g

Explanation:

Given parameters:

Percentage of NaCl in ocean water = 3.5%

Mass of given seawater = 750g

Unknown:

Mass of NaCl in the seawater = ?

Solution:

  This is a simple percentage problem:

We have been given that ocean water contains 3.5% of NaCl;

 Therefore;

Mass of NaCl in seawater = Percentage of NaCl in ocean water x Mass of seawater

Mass of NaCl in seawater = \frac{3.5}{100} x 750g = 26.25g

Learn more:

Percentage brainly.com/question/2917248

#learnwithBrainly

3 0
3 years ago
In a chemical change molecules DO NOT create or break chemical bonds to form a new substance you might be able to observe a chem
vesna_86 [32]

Answer:

false

Explanation:

3 0
3 years ago
Name for temperature for freezing
Debora [2.8K]
For water to freeze it would need to be 32 degrees Fahrenheit or 0 degrees Celsius. 
5 0
3 years ago
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