Answer is:
concentration of ammonium ions are 7,14·10⁻¹⁴ M.<span>
Chemical reaction: 2NH</span>₃(l) → NH₄⁺(am) + NH₂⁻(am).<span>
Kam = 5,1·10</span>⁻²⁷.<span>
[NH</span>₄⁺] ·
[NH₂⁻] = x; equilibrium concentration of cations and anions.<span>
Kam = [NH</span>₄⁺] · [NH₂⁻].<span>
Kam = x².
x = [NH</span>₄⁺]
= √5,1·10⁻²⁷.<span>
[NH</span>₄⁺] =
7,14·10⁻¹⁴<span> M.</span>
<span>the balanced equation for the reaction is as follows ;
Na</span>₂S + 2AgNO₃ ---> 2NaNO₃ + Ag₂<span>S
stoichiometry of Na</span>₂S to AgNO₃<span> is 1:2
number of AgNO</span>₃<span> moles reacted - 0.315 mol/L x 0.04000L = 0.0126 mol according to molar ratio of 1:2
number of Na</span>₂S moles required are - 1/2 x number of AgNO3 moles reacted Na₂<span>S moles = 0.0126 mol /2 = 0.00630 mol
molarity of Na</span>₂<span>S - 0.260 M
there are 0.260 mol in 1 L
therefore 0.00630 mol are in - 0.00630 mol / 0.260 mol/L
volume of Na</span>₂<span>S required = 0.0242 L
volume of Na</span>₂S required = 24.4 mL
Answer:
It contains a protective layer of ozone.
Explanation:
The ozone layer is not contained in the troposphere. It is located in a layer above above the ozone which is called the stratosphere.
- The troposphere is lowest layer of the atmosphere
- This layer is the closest to us and it is where all weather conditions occur.
- It has a thickness of about 10km.
- Also, in the troposphere, temperature decreases vertically up.
Answer:
Across a row, atomic radii decreases.
Explanation:
It decreases because nuclear charge increases across a row, electrons are added to the same shell and shielding remains constant. Therefore the outer electrons are more attracted to the nucleus making the atom smaller.
Answer:
[tex]Every science experiment should follow the basic principles of proper investigation so that the results presented at the end are seen as credible.}}}
Observation and Hypothesis. ...
Prediction and Modeling. ...
Testing and Error Estimation. ...
Result Gathering and Presentation. ...
Conclusions. ...
Law Formation.
Hope it help