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Basile [38]
3 years ago
9

Select all the correct answers.

Chemistry
1 answer:
pochemuha3 years ago
8 0

<u>Out of all given option, the following statements are true about a system:</u>

  • A system is a group of objects analyzed as one unit.
  • Energy that moves across system boundaries is conserved

Answer: Option A and B

<u>Explanation:</u>

A system is "a complicated item whose parts or segments are identified with probably a portion of different segments", it very well may be material or calculated. All systems have piece, structure, and condition, yet just material systems have instruments (or forms), and just some material systems have shape.

As per systems, all articles are systems or segments of another system. For instance, a nuclear core is a physical material system made out of protons and neutrons related by solid atomic association; a cell is a natural material system made out of related organelles by non-covalent synthetic securities and metabolic pathways; and a logical hypothesis is a consistent reasonable system made out of theories, definitions, and hypotheses related by relationship and conclusion.

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Which element in the alkali group will have the lowest first ionization energy?
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Explanation:

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69g of sodium reacts with chlorine to produce sodium chloride. calculate the number of moles of chlorine required to react with
Rus_ich [418]

Answer:

3 moles of Cl^{-} is needed for Na^{+}to be fully consumed.

Explanation:

For the balanced equation:

                                  Na^{+}  +  Cl^{-}  ⇒  NaCl

First, find the moles of Na corresponding to the 69g used the general definition of mol:

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