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shutvik [7]
2 years ago
6

What is the bond energy per mole for breaking all the bonds of oxygen, O 2 ?

Chemistry
1 answer:
vaieri [72.5K]2 years ago
4 0
There is only one O=O bond in an O2 molecule, so the energy ΔHO2 required for breakingall the bonds in a mole of O2 molecules is 498 kJ/mol O2 molecules. Calculate the bond energy per mole for forming all the bonds of water molecules, H2O
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What element has a ion smaller than a ion of calcium?
elena55 [62]
It is scandium or titanium iron chroniclemium vanadium manganese
5 0
2 years ago
Which of the following refers to a chemical property?. . a. At room temperature, mercury is a liquid, but gold is a solid.. . b.
luda_lava [24]
Out of the choices given, the answer which refers to a chemical property is going to be B. Water will not burn, but gasoline is flammable. The reason why is because burning and flammability are both chemical properties. 
6 0
2 years ago
A piece of lead loses 78.0 J ofheat and experiences a decrease in temperature of 9.0C the specific heat of lead is .130J/gC what
Ratling [72]
The  mass of  the piece  of  lead   is    calculated  using the  below  formula
Q(heat)= mC delta T

Q = 78.0  j
M=mass =?
C=specific heat capacity (   0.130 j/g/c
delat T=change in temperature =  9.0 c

by  making  M  the  subject  of  the formula
M = Q/ c delta T

M=  78.0 j/ 0.130 j/g/c  x  9.0 c =  66.7 g  of  lead
3 0
2 years ago
Click the "draw structure" button to launch the drawing utility. Propane (CH3CH2CH3) has both 1° and 2° hydrogens. Draw the carb
OlgaM077 [116]

Answer:

a) find attached image 1

b) find attached image 2

Explanation :

The more stable radical is formed by a reaction with smaller bond dissociation energy.

since the bond dissociation for cleavage of the bond to form primary free radical is higher, more energy must be added to form it. This makes primary free radical higher in energy and therefore less stable than secondary free radical.

6 0
2 years ago
When 60.0 g of CH4 reacts with excess O2, the actual yield of CO2 is 112 g. What is the percent yield? CH4(g) + 2O2(g) → CO2(g)
zepelin [54]

Answer:

67.88% is the percent yield.

Explanation:

CH_4(g) + 2O_2(g)\rightarrow CO_2(g) + 2H_2O(g)

Moles of methane = \frac{60.0 g}{16 g/mol}=3.75 mol

According to reaction,1 mole of methane gives 1 mole of carbon dioxide gas, then 3.75 moles of methane will give :

\frac{1}{1}\times 3.75 mol =3.75 mol of carbon dioxide gas

Mass of 3.75 moles of carbon dioxide gas:

3.75 mol × 44 g/mol = 165 g

Theoretical yield of the carbon dioxide gas = 165 g

Experimental yield of the carbon dioxide gas = 112 g

The percentage yield of the reaction :

Yield\%=\frac{\text{actual yield}}{\text{Theoretical yield}}\times 100

=\frac{112 g}{165 g}\times 100=67.88\%

67.88% is the percent yield.

5 0
2 years ago
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