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Harman [31]
2 years ago
9

I have to do an experiment about reaction rates, and i need to have things to dissolve..

Chemistry
1 answer:
Leona [35]2 years ago
3 0

Answer:

salt ( with food coloring)

sand

sodium chloride

coffee

flour

oil

vinegar

different types of pancake mix

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2. reasoning

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What halogen can react with sodium chloride solution to produce chlorine?
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As electro-negativity decreases from Florine to downwards in the group and only Florine is above Chlorine, so Florine should react with sodium chloride solution to produce chlorine.  

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2 years ago
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Given the reaction: 2H₂ + O₂ → 2H₂O The total number of grams of O₂ needed to produce 54 grams of water is _________.
Vedmedyk [2.9K]

Answer : The mass of O_2 needed are, 48 grams.

Explanation :

First we have to calculate the moles of H_2O

\text{Moles of }H_2O=\frac{\text{Given mass }H_2O}{\text{Molar mass }H_2O}=\frac{54g}{18g/mol}=3mol

Now we have to calculate the moles of O_2

The given balanced chemical reaction is:

2H_2+O_2\rightarrow 2H_2O

From the reaction, we conclude that

As, 2 mole of H_2O produces from 1 mole of O_2

So, 3 mole of H_2O produces from \frac{3}{2}=1.5 mole of O_2

Now we have to calculate the mass of O_2

\text{ Mass of }O_2=\text{ Moles of }O_2\times \text{ Molar mass of }O_2

Molar mass of O_2 = 32 g/mole

\text{ Mass of }O_2=(1.5moles)\times (32g/mole)=48g

Therefore, the mass of O_2 needed are, 48 grams.

4 0
3 years ago
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