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Drupady [299]
4 years ago
11

Alkaline earth metals do not react with oxygen. true or false

Chemistry
1 answer:
elena-s [515]4 years ago
3 0
False. Alkaline earth metals react with oxygen.
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Logging trees is often controversial. Why would some people support logging and some people not support logging?
Harlamova29_29 [7]
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4 years ago
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3 years ago
For hydrocyanic acid, HCN, Ka = 4.9 × 10-10. Calculate the pH of 0.20 M NaCN. What is the concentration of HCN in the solution?
gogolik [260]
By using the ICE table :

initial    0.2 M            0           0
change -X                 + X           +X
Equ     (0.2 -X)            X               X

when Ka = (X) (X) / (0.2-X)
so by substitution:

4.9x10^-10 = X^2 / (0.2-X) by solving this equation for X 
∴X ≈ 10^-6
∴[HCN] = 10^-6

and PH = -㏒[H+]
             = -㏒ 10^-6
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3 years ago
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Hence, concentration of base is 1.17 M
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3 years ago
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Vikentia [17]

Answer:

Absorbing beta particle because the beta is the numbers and are less and the  big numbers are positive and they are the alpha so when you add beta particle it is called Absorbing so the answer is Absorbing beta particle

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3 years ago
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