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Natalija [7]
3 years ago
10

Describe the formation of a sodium ion.

Chemistry
1 answer:
Dvinal [7]3 years ago
5 0
Sodium ion- it has 1 valence electron so its easy for it to loose this electron. Thus, it forms sodium ion by loosing its valence elctron while reacting.It forms Na+. ... Oxide ion- it has 6 valence electrons so it gains 2 electrons lost by a metal atom and reacts with it.
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Answer:

A

Explanation:

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The quantity of antimony in a sample can be determined by an oxidation–reduction titration with an oxidizing agent.
kotegsom [21]

Answer:

The percentage is   k  = 20.8%

Explanation:

From the question we are told that

    The mass of the stibnite is  m_s  = 5.86 \ g

   The volume of   KBrO3(aq) is  V  = 26.6 mL =  26.6 *10^{-3} \ L

     The concentration  of   KBrO3(aq) is  C  = 0.125 M

Now the balanced ionic  equation for this reaction is

        BrO_3 ^{-}+ 3Sb^{3+} + 6H^{+}  \to  Br^{1-} + 3Sb^{5+} + 3H_2O

The number of moles of   BrO_3 ^{-} is  

     n =  C *V

substituting values

     n =  26.6*10^{-3} *  0.125

     n = 0.003325 \ mols

from the reaction we see that 1 mole of BrO_3 ^{-}  reacts with 3 moles of  Sb^{3+}

so 0.003325 moles will react with x moles of  Sb^{3+}

Therefore

               x = \frac{0.003325 * 3}{1}

              x = 0.009975 \ mols

Now the molar mass of Sb^{3+} is a constant with a values of  Z =  121.76 \  g/mol

Generally the mass of  Sb^{3+} is mathematically represented as

        m  =  x * Z

substituting values

        m  =  1.215 \ g

The percentage of  Sb(antimony) in the overall mass of the stibnite is mathematically evaluated as

            k  = \frac{1.215}{5.85 } * 100

           k  = 20.8%

   

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3 years ago
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3. Why have we not been able to create a fusion reactor on Earth?
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Answer:

We are not able to create a fusion reactor on Earth because fusion energy production is not based on a chain reaction, as is fission. Plasma must be kept at very high temperatures with the support of external heating systems and confined by an external magnetic field.

Explanation:

7 0
3 years ago
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IF YOU DO THIS CORRECTLY YOU WILL GET BRAINLIEST AND 20 POINTS
atroni [7]

22/30=0.734

18/50= 0.36

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x/100=0.44 times 100= 44

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