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julia-pushkina [17]
2 years ago
14

Help! I need to finish work. Brainlist will be given to the most helpful!

Chemistry
1 answer:
Soloha48 [4]2 years ago
7 0

Answer:

1. matches with elements.

2. matches with compounds.

3. matches with atoms

4. matches with weight

5. matches with gas

6. matches with carbon dioxide

7. matches with Mendeleev (there's an element named after him)

8. matches with IUPAC

Hope that helped :)

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1. NaOH mass of a solution of 200g in which its percentage is 25%. What mass of sulfuric acid solution is needed to completely n
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m_{H2SO4 = 61.25 g

m_{Na2SO4} = 88.75 g

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m_{NaOH} = \frac{200 . 25 }{100} = 50 g

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2NaOH + H2SO4 ⇒ Na2SO4 + 2H2O

   2        :     1           :      1         :    2

 1.25                                                       (moles)

⇒  n_{H2SO4} = 1.25 × 1 ÷ 2 = 0.625 (moles) ⇒ m_{H2SO4} = 0.625 × 98 = 61.25 g

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4 0
3 years ago
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