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Gre4nikov [31]
3 years ago
11

If a half life is 2.5 hours, how long is 2 half life's

Chemistry
2 answers:
nlexa [21]3 years ago
7 0

Answer:

5 hours

Explanation:

cause if half life is 2.5hours we just multiply it by two and get 5 hours

hram777 [196]3 years ago
4 0

Answer:

Im not really sure what a half life is, but two of them would be 5.0 hours

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1. The following reaction does not proceed to form a product: H2O + Au---> no reaction. Why is that?
Xelga [282]
1. B
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2C₂H₆ + 7O₂ → 4CO₂ + ₆H₂O

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8 0
3 years ago
Read 2 more answers
Hno3, a strong acid, is added to shift the ag2co3 equilibrium (equation 7.6) to the right. explain why the shift occurs.
Deffense [45]
Answer 1)  When a strong acid like HNO_{3} reacts with Ag_{2} CO_{3} usually the equilibrium shifts to the right because

As per the Le chatelier's principle "if in any reaction, a dynamic equilibrium is disturbed by changing the any of the conditions, the position of equilibrium moves to counteract the change."  So, in the given reaction when HNO_{3} reacts with Ag_{2} CO_{3}  it generates carbon dioxide and water as a by product, if we are adding HNO_{3} it will remove some of the CO_{3} molecule from the reaction mixture, which then tends to shift the equilibrium towards right.

Answer 2) The same would be observed in this case, if we replace HNO_{3} with HCl it will shift the equilibrium to the right as their will be generation of AgCl as the precipitate.

As per the definition of Le Chatelier's principle if we add reactants in the reaction the equilibrium will tend to move towards right, also if we replace the products or remove it then too it will shift the equilibrium towards right. So, in this reaction you are removing Ag^{+} and Cl^{-} ions from the solution.
7 0
3 years ago
what is the pH of a solution prepared from solid, neutral 2-nitrophenol providing a fromal concentration of 0.0353M, given that
REY [17]

Answer:

pH = 4.34

Explanation:

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= -1/2( log 5.98*10^-8) -1/2(log 0.0353)

=-1/2(-7.22)-1/2(-1.45)

=3.61+0.725= 4.34

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3 years ago
1. Aluminium reacts with chlorine to produce aluminium chloride. The balanced reaction is:
Anton [14]

Answer:

Explanation:

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6 0
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