3 years ago

What effect does observing a substances physical properties have on the substance

Chemistry

1 answer:

Allisa [31]3 years ago

7 0

No effect. only chemical properties change the substance when they are tested

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Balance the following chemical equation: ___HCO + ___O —> ___H2 + ___CO3

yawa3891 [41]

Answer: 2HCO + 4O → H2 + 2CO3

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Reaction Type: SINGLE REPLACEMENT

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Hydrogen gas and fluorine gas will react to form hydrogen fluoride gas. What is the standard free energy change for this reactio

Marta_Voda [28]

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$\Delta G=-541.4kJ/mol$

Explanation:

Hello there!

In this case, according to the given information, it turns out firstly necessary to write out the described chemical reaction as shown below:

$H_2+F_2\rightarrow 2HF$

Now, we set up the expression for the calculation of the standard free energy change, considering the free energy of formation of each species, specially those of H2 and F2 which are both 0 because they are pure elements:

$\Delta G=2\Delta G_f^{HF}-(\Delta G_f^{H_2}+\Delta G_f^{F_2})\\\\\Delta G=2*-270.70kJ/mol-(0kJ/mol+0kJ/mol)\\\\\Delta G=-541.4kJ/mol$

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Step2247 [10]

Answer:

up down up down thats the pattern

Explanation:

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