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mote1985 [20]
3 years ago
6

What is a period in chemistry

Chemistry
1 answer:
Dennis_Churaev [7]3 years ago
5 0
A period is the name given to a horizontal row of the periodic table. The periodic table has 7 periods.
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Why are experimental investigations the best type of scientific investigation to demonstrate cause-and-effect relationships?
Fudgin [204]

Answer:

are the best type of scientific investigation to demonstrate cause-and-effect relationships because they allow the investigator to actively manipulate variables and control conditions.

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Ag2O(s) → 2Ag(s) + ½ O2(g) ΔH° = 31.05 kJ Which statements concerning the reaction above are true? (1) heat is released (2) heat
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D) 2, 4, and 5

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In order to fully comprehend the answer choices we must take a close look at the value of ΔH° = 31.05. The enthalpy change of the reaction is positive. A positive value of enthalpy of reaction implies that heat was absorbed in the course of the reaction.

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Since ∆Hreaction= ∆H products -∆H reactants, a positive value of ∆Hreaction implies that ∆Hproducts >∆Hreactants, hence the answer choice above.

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How many moles of copper Atoms are in 4 moles of Cu3(po4)2
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