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Alexxx [7]
4 years ago
14

4. Is it possible for two different compounds to be made from the exact same two elements? Why or why not? With a limited number

of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?
Chemistry
1 answer:
densk [106]4 years ago
3 0

no it is not possible, because they both have the same number of valence electrons in each element. in a compound you are supposed to have two or more elements that have different numbers of valence electrons so when put together they for a compound.

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What is the correct definition of a mixture?
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Answer:

a substance made by mixing other substances together.

Explanation:

A mixture is a substance made by mixing two or more substances together.

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3 years ago
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How many grams of lead(II) sulfate (303 g/mol) are needed to react with sodium chromate (162 g/mol) in order to produce 0.162 kg
Afina-wow [57]

Answer : The mass of PbSO_4 needed are, 1.515 grams.

Explanation :

First we have to calculate the mole of PbCrO_4.

\text{Moles of }PbCrO_4=\frac{\text{Mass of }PbCrO_4}{\text{Molar mass of }PbCrO_4}=\frac{0.162g}{323g/mole}=0.005mole

Now we have to calculate the moles of PbSO_4.

The balanced chemical reaction will be,

PbSO_4+Na_2CrO_4\rightarrow PbCrO_4+Na_2SO_4[tex]From the balanced chemical reaction, we conclude thatAs, 1 mole of [tex]PbCrO_4 produced from 1 mole of PbSO_4

So, 0.005 mole of PbCrO_4 produced from 0.005 mole of PbSO_4

Now we have to calculate the mass of PbSO_4

\text{Mass of }PbSO_4=\text{Moles of }PbSO_4\times \text{Molar mass of }PbSO_4

\text{Mass of }PbSO_4=0.005mole\times 303g/mole=1.515g

Therefore, the mass of PbSO_4 needed are, 1.515 grams.

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3 years ago
What is an example of a neutral mutation? a frog born with white skin a person's inability to break down sugar a red flower with
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The balanced chemical reaction is:

<span>Mg(OH)2  +  2HCl  -->  MgCl2  +  2H2O</span>

 

So we can see that 2 moles of HCl reacts for every 1 mole of Mg(OH)2.

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moles HCl left = 0.00875 mol

 

So the concentration of H+ ion is:

[H+] = 0.00875 mol / (0.150 L + 0.040 L)

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So the pH is:

pH = - log 0.046

<span>pH = 1.34</span>

5 0
3 years ago
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