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aleksley [76]
2 years ago
11

How is the periodic table arranged ( give two ways)

Chemistry
1 answer:
vlabodo [156]2 years ago
7 0
Left side metals right side non metals. arrganged in groups (columns) and periods (rows), each group tells you amount of valence electrons
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What is the mass of H2O produced when 14.0 grams of H2 reacts completely with 2.0 grams of O2?
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Balanced chemical equation:

2 H2 + 1 O2 = 2 H2O

4 g H2  -------> 32 g O2 -----------> 36 g H2O
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32 * mass H2O = 2.0 * 36

32 * mass H2O = 72

mass of H2O = 72 / 32

mass of H2O = 2.25 g

hope this helps!.


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