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madam [21]
2 years ago
12

How did Mendeleev set up his Periodic Table of Elements?

Chemistry
1 answer:
Ksju [112]2 years ago
8 0
He set up his periodic table by the atomic mass
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2 years ago
How many moles of iron are there in 55.85g of Fe3O4
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Answer:

• Molecular mass of Iron (III) tetraoxide

\dashrightarrow \: { \tt{(56 \times 3) + (16 \times 4)}} \\  = { \tt{168 + 64}} \\  = { \tt{232\:g}}

[ molar masses: Fe → 56, O → 16 ]

\dashrightarrow \:{ \rm{232 \: g \:  = 1 \: mole}} \\ \\   \dashrightarrow \: { \rm{55.85 \: g = ( \frac{55.85}{232}) \: moles }} \\  \\ \dashrightarrow \:  { \boxed{ \tt{ = 0.24 \: moles}}}

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