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7nadin3 [17]
3 years ago
15

CAN SOMEONE HELP ME? I NEED HELP ASAP PLZ!!!! TODAY!!!!! #4-#7

Chemistry
1 answer:
evablogger [386]3 years ago
4 0
4.it tells you that baking soda is an alkali
5. Because it it is very acidic it means it might not have very much water
6. Acid and more less then 7
7. It is different because it measures all different things where as the fahrenheit temperature only measures the temperature
Sorry about number 7 it isn't very good
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The number of nucleons in an atom is the atom's (atomic, mass) number.
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What is milliliter the same as?
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1 C8H10(l) +21/2O2(g) → 8CO2(g) + 5H2O(g), Hcomb= ? Hf for C8H10(l) = +49.0kJ/mol C8H10(l) Use the balanced combustion reaction
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Answer:

H_{comb}=-4406kJ/mol

Explanation:

Hello,

In this case, the enthalpy of combustion is understood as the energy released when one mole of fuel, in this case octene, is burned in the presence of oxygen and is computed with the enthalpies of formation of the fuel, carbon dioxide and water as shown below (oxygen is circumvented as it is a pure element):

H_{comb}=8*\Delta _fH_{CO_2}+5\Delta _fH_{H_2O}-\Delta _fH_{C_8H_{10}}

Thus, since we already know the enthalpy of combustion of the fuel, for carbon and water we have -393.5 and -241.8 kJ/mol respectively, thereby, the enthalpy of combustion turns out:

H_{comb}=8*(-393.5kJ/mol)+5(-241.8kJ/mol)-49.0kJ/mol\\\\H_{comb}=-4406kJ/mol

Best regards.

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Without constants you would not know which variable affected the
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Two independent variables could change at the same time, and you would not know which variable affected the dependent variable
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chemical properties a. include changes of state of a substance b. include mass and color c. include changes that alter the ident
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