3 years ago

Realizar la notación de Lewis de los

Chemistry

1 answer:

belka [17]3 years ago

7 0

Answer:

gggggggggggggggg

Explanation:

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Using the following equation for the combustion of octane, calculate the heat associated with the combustion of 100.0 g of octan

Sonja [21]

Answer: B) -4819 kJ

Explanation:

The balanced reaction for combustion of octane is:

$2C_8H_{18}+25O_2\rightarrow 16CO_2+18H_2O$ $\Delta H^0_{rxn}=-11018kJ$

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

given mass of octane = 100.0 g

Molar mass of octane = 114.33 g/mol

Putting in the values we get:

$\text{Number of moles}=\frac{100.0g}{114.33g/mol}=0.8747moles$

According to stoichiometry:

2 moles of octane give heat = -11018 kJ

Thus 0.8747 moles of octane give = $\frac{-11018}{2}\times 0.8747=-4819kJ$

Thus -4819 kJ of heat is released by 100.0 g of octane assuming complete combustion.

5 0

4 years ago

Read 2 more answers

C2H2 + 2H2 → C2H6<br> How many moles of hydrogen are needed to produce 13.78 mol of ethane?

Scilla [17]

Answer:

27.56 moles

Explanation:

8 0

4 years ago

What two factors must be held constant for density to be a constant ratio?

Neko [114]

Answer:

Temperature and Pressure

Explanation:

Temperature and pressure cause change in volume.

So any change in volume will alter the ratio of density as given by equation of density.

Density = mass/ volume

Change in volume will alter the ratio.

Kindly mark it branliest if the answer is little bit satisfying.

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3 years ago

Which proccess do NOT build mountains

PIT_PIT [208]

Answer:

its does not

Explanation:

not do...................

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3 years ago

The difference between 24.31 and 18.62

coldgirl [10]

24.31-18.62=5.69

The answer is 5.69

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4 years ago