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il63 [147K]
3 years ago
15

The outline of a partial periodic table is shown.

Chemistry
2 answers:
Irina-Kira [14]3 years ago
7 0
I think is section 3
vova2212 [387]3 years ago
4 0

Answer:

I think section #3

Explanation:

When i was in science class in my memory it was always in that area

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Heat is added to a chemical system. Which energy will increase?
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Answer:

the kinetic energy of the reactant molecules(C)

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Calculate the percentage by mass of oxygen in Al2(SO4)3 (Al=27, S=32,O= 16) PLEASE SHOW FULL WORKING​
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Answer:

There is 61.538% oxygen in Al2(SO4)3.

Explanation:

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Total Wt. Of the compound = 2*12+3*32+12*16 = 312 amu.

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3 years ago
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What is the correct formula for combining Mg2+ and Br1+
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Answer: The correct formula is MgBr_2

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.  

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The cations and anions being oppositely charged attract each other through strong coloumbic forces and form an ionic bond.

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What enzyme is responsible for transcription?
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What happens to the electropositive character of elements on moving from left to right along a period in a periodic table?​
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On moving from left to right in a period the electropositive character decreases as the tendency to lose electrons decreases.

Explanation:

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