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2 years ago

I need help with this

Chemistry

2 answers:

cricket20 [7]2 years ago

7 0

Answer:

#TEAM BOB

FOR BOB!!!!!!!

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░░░░░░░▀███▀█░▄░░ Help Bob

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Copy and paste to help Bob.

We can do it together!#TEAM BOB

FOR BOB!!!!!!!

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░░░▌░▄▄▄▐▌▀▀▀░░ Dis is Bob

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▀█▌░░░▄░▀█▀░▀ ░░

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░░░░░░░▀███▀█░▄░░ Help Bob

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Copy and paste to help Bob.

We can do it together!#TEAM BOB

FOR BOB!!!!!!!

░░░░░▐▀█▀▌░░░░▀█▄░░░

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░░░█▀▄▄▄█░▀▀░░

░░░▌░▄▄▄▐▌▀▀▀░░ Dis is Bob

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░░░░░░░▄▄▐▌▄▄░░░

░░░░░░░▀███▀█░▄░░ Help Bob

░░░░░░▐▌▀▄▀▄▀▐▄░░ take over

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Copy and paste to help Bob.

We can do it together!

Explanation:

Vedmedyk [2.9K]2 years ago

5 0

Answer:

i think its 63 pls do not get mad if not 63

Explanation:

from 60 you add three?(:

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The average propane cylinder for a residential grill holds approximately 18 kg of propane. how much energy (in kj) is released b

Angelina_Jolie [31]

Let's begin with the basic values that will be used in the solution.

The formula of propane is C3H8. It is an alkane, a hydrocarbon with the general formula of CnH2n+2. Notice that hydrocarbons have only Carbon and Hydrogen atoms. Its molar mass (M) is 44 g.

Molar Mass Calculation is done as like that
C=12 g/mol, H=1 g/mol. 1 mole propane has 3 moles Carbon atoms and 8 mole Hydrogen atoms. M(C3H8)= 3*12+ 8*1= 44 g

Combustion reaction of hydrocarbons gives carbon dioxide and water by releasing energy. That energy is called as enthalpy of combustion (ΔHc°).

ΔHc° of propane equals -2202.0 kj/mol. Burning of 1 mole C3H8 releases 2202 kj energy. Minus sign only indicates that the energy is given out ( an exothermic reaction ).

Let's write the combustion reaction.
C3H8 + O2 ---> CO2 + H20 (unbalanced) ΔHc° = -2202 kj/mol

Now, we calculate mole of 20 kg propane. Convert kilogram into gram since we use molar mass is defined in grams.
mole=mass/molar mass ; n=m/M ; n= 20000 g /44 (g/mol)=454 mole

1 mole propane releases 2202 kj energy.
454 mole propane release 2202 kj *454= 1000909 kj

The answer is 1000909 kj.

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1.5M NaOH so we've 1.5 moles of NaOH in 1L of solution

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