3 years ago

HELP FAST Plz!!!!!!

Chemistry

1 answer:

loris [4]3 years ago

4 0

Answer:c

Explanation:Gii

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At 2.10 per gallon, how much will it cost to buy 125 liters of Costco’s premium gas

Dmitry_Shevchenko [17]

Answer:

$69.35

Explanation:

125 divided by 3.785(liters in a gallon) , you get 33.025

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4 years ago

Read 2 more answers

C3H8+3O2 = 3CO2+4H2O what is the enthalpy combustion

dezoksy [38]

Answer:

$\Delta H_{comb}=2043.85kJ/mol$

Explanation:

Hello there!

In this case, according to the given chemical reaction, it possible for us to set up the expression for the calculation of the enthalpy change as shown below:

$\Delta H_r=-\Delta H_{comb}=3\Delta _fH_{CO_2}+4\Delta _fH_{H_2O}-\Delta _fH_{C_3H_8}-3\Delta _fH_{O_2}$

Thus, given the values of the enthalpies of formation on the attached file, we obtain: $-\Delta H_{comb}=3(-393.5kJ/mol)+4(-241.8kJ/mol)-(-103.85kJ/mol)-3(0kJ/mol)\\\\-\Delta H_{comb}=-2043.85kJ/mol\\\\\Delta H_{comb}=2043.85kJ/mol$