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White raven [17]
3 years ago
7

How is the modern periodic table arranged?

Chemistry
2 answers:
tigry1 [53]3 years ago
3 0
Modern periodic table is arranged on the basis of element's increasing "Atomic numbers"

Hope this helps!
Leokris [45]3 years ago
3 0

Answer:

by atomic number, with chemical families or groups in columns and periods in rows

Explanation:

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How many kilojoules of heat are released when 32.0 g of NaOH are dissolved in water? (The molar heat of solution of NaOH is –445
Katen [24]
The energy release when dissolving 1 mol of NaOH in water is 445.1 kJ
the mass of NaOH to be dissolved is 32.0 g
The number of NaOH moles in 32.0 g - 32.0 g / 40 g/mol =  0.8 mol
the energy released whilst dissolving 1 mol of NaOH - 445.1 kJ
when dissolving 0.8 mol - the energy released is 445.1 kJ/mol x 0.8 mol
therefore heat released is - 356.08 kJ
answer is -356.08 kJ
6 0
3 years ago
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Rocks are classified according to their composition and color. true or false
il63 [147K]
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2 HBr(g)+O2(g)—>H2O2(g)+Br2(g)
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b

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8 0
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Question 8 of 8> 0 Attempt 2 A chemist needs to determine the concentration of a sulfuric acid solution by titration with a s
Nesterboy [21]

Answer:

12.29 M

Explanation:

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H₂SO₄ + 2NaOH → 2Na⁺ + SO₄⁻² + 2H₂O

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3 years ago
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Explanation:

Which of the following is not a postulate of the kinetic molecular theory?

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3 years ago
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