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zhuklara [117]
3 years ago
9

Which of these contains information about the elements

Chemistry
1 answer:
Monica [59]3 years ago
7 0
Post the question so we can help
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Quinine is an important type of molecule that is involved in photosynthesis. The transport of electrons mediated by quinone in c
Irina18 [472]

Answer:

The heat of combustion is -25 kJ/g = -2700 kJ/mol.

Explanation:

According to the Law of conservation of energy, the sum of the heat released by the combustion reaction and the heat absorbed by the bomb calorimeter is equal to zero.

Qcomb + Qcal = 0

Qcomb = - Qcal

The heat absorbed by the calorimeter can be calculated with the following expression.

Qcal = C × ΔT

where,

C is the heat capacity of the calorimeter

ΔT is the change in temperature

Then,

Qcomb = - Qcal

Qcomb = - C × ΔT

Qcomb = - 1.56 kJ/°C × 3.2°C = -5.0 kJ

Since this is the heat released when 0.1964 g o quinone burns, the energy of combustion per gram is:

\frac{-5.0kJ}{0.1964g} =-25kJ/g

The molar mass of quinone (C₆H₄O₂) is 108 g/mol. Then, the energy of combustion per mole is:

\frac{-25kJ}{g} .\frac{108g}{1mol} =-2700kJ/mol

6 0
3 years ago
Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12
LuckyWell [14K]
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8 0
3 years ago
Which of the following metals will react with water to produce a metal hydroxide and hydrogen gas?
Pachacha [2.7K]
Na is the answer hope it help
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3 years ago
How many moles of hydrogen are in 5.2 moles of c7h18
alexandr1967 [171]
The percentage of hydrogen in C7H18 is calculated as follows:
[18/(12*7+1*8)]*100=18%
The amount of hydrogen in 5.2moles is given by:(18/100)*5.2=0.94moles
6 0
3 years ago
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Which of these experimental designs could lead to bias?
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Hey there i see you need help well i am here to do just that it is c because if you are getting paid your more likely to lie ans say"great" things. 
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3 years ago
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