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notka56 [123]
4 years ago
14

How many neutrons does an element have if its atomic number is 42 and its mass number is 155? (10 Points)

Chemistry
1 answer:
sertanlavr [38]4 years ago
8 0

The Element would have 197 neutrons

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The solubility of copper(i) chloride is 3.91 mg per 100.0 ml of solution. calculate ksp for cucl (cucl=99.00 g mol-1).
garri49 [273]
Convert  Mg  to  grams
1g =1000mg  what  about  3.91  Mg
=  3.91mg  x  1g/1000mg=  3.91  x10^-3 g
moles= mass/molar mass
that  is  3.91  x10^-3g  /99 g/mol=3.95 x10^-5moles
concentration=   moles  /  vol   in  liters

that  is  3.95  x10^-5/100  x1000=  3.94  x10^-4M

equation for  dissociation  of  CUCl=   CUCl---->  CU^+   +Cl^-

Ksp=(CU+)(CI-)
that  is  (3.95  x10^-4)(3.95  x10^-4)
Ksp=  1.56  x10^-7
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sergiy2304 [10]
I think the anwser is A
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Which of these is an example of a way someone can help the environment? A. Increase the amount of travel done by car. B. Increas
HACTEHA [7]

Answer:  D. Increase the amount of travel done by bike.

Explanation:

Environment protection has become a concerned issue for the human society because of the fact that certain human activities are deteriorating the quality of air, water, and soil by liberating wastes into the environment.

Among the options given,  D. Increase the amount of travel done by bike. is the correct option. This is due to the fact that use of bike instead of using automobile like car will prevent the large amount of emission of harmful gases which are capable of polluting the air, water and soil can be restricted.  

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