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zlopas [31]
3 years ago
11

What is the best way to measure the age of the Earth and why? Explain how scientists do this.

Chemistry
1 answer:
UkoKoshka [18]3 years ago
3 0

Explanation:

the best way to understand the age of the earth is to estimate the age of matirials in it

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How do anion formation and valence electrons relate?
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Answer:

A cation is formed when a metal ion loses a valence electron while an anion is formed when a non-metal gains a valence electron. They both achieve a more stable electronic configuration through this exchange.

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2 years ago
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3 years ago
For a particular isomer of C8H18, the combustion reaction produces 5104.1 kJ of heat per mole of C8H18(g) consumed, under standa
Vladimir79 [104]

Answer:

Explanation:

Hello,

Considering the chemical reaction, the enthalpy of reaction is given by:

ΔH°rxn=ΔfHCO2+ΔfHH2O-ΔfHC8H18

(ΔfHO2=0)

Taking into account that the reaction produces energy, ΔH°rxn is negative. No, solving for ΔfHC8H18:

ΔfHC8H18=-ΔH°rxn+8*ΔfHCO2+9*ΔfHH2O

ΔfHC8H18=-(-5104.1 kJ/mol)+9*(-292.74kJ/mol)+8*(-393.5 kJ/mol)

ΔfHC8H18=-678.56 kJ/mol

Best regards.

3 0
3 years ago
True/False: When a substance is heated, the change in energy causes the bonds between particles to become stronger.​
Rzqust [24]

Answer:

false

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