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kirill [66]
2 years ago
5

Which statements about scientific explanations are true? I. Scientific explanations must prove that a hypothesis is true. II. Sc

ientific explanations should be based on evidence or data. III. Scientific explanations must have logical and consistent arguments. IV. Scientific explanations should use scientific principles, models, and theories. A. I, II, III and IV B. I, II and III only C. II, III and IV only D. II and III only
Chemistry
1 answer:
Oksana_A [137]2 years ago
4 0

Answer:

Statement about scientific explanations is true :

C. II, III and IV only

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2Ni(OH) → Ni2O + H2O <br> How many moles of water forms from 4.20 mol of nickel (I) hydroxide?
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Answer:

2.1 moles of water formed.

Explanation:

Given data:

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Solution:

Chemical equation:

2Ni(OH)    →  Ni₂O + H₂O

Now we will compare the moles of Ni(OH)  with water.

             Ni(OH)           :            H₂O

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              4.20             :            1/2×4.20 = 2.1 mol

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