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kumpel [21]
1 year ago
11

Context givin in picture

Chemistry
1 answer:
NeX [460]1 year ago
6 0

Answer:

200

Explanation:

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Using the following equation for the combustion of octane, calculate the heat associated with the formation of 100.0 g of carbon
givi [52]

Answer: Heat associated with the formation of 100.0 g of carbon dioxide is 1563.2 kJ.

Explanation:

Reaction equation will be as follows.

    2C_{8}H_{18} + 25O_{2} \rightarrow 16CO_{2} + 18H_{2}O;  \Delta H^{o}_{rxn} = -11018 kJ

Mass of CO_{2} = 100 g

Hence, moles of CO_{2} present will be calculated as follows.

       No. of moles = \frac{mass}{\text{molar mass}}

                             = \frac{100 g}{44.0095 g/mol}

                             = 2.27 mol

Therefore, heat produced by 2.27 mol for the given reaction will be calculated as follows.

         2.27 mol \times \frac{11018 kJ}{16 mol CO_{2}}

             = 1563.2 kJ

Thus, we can conclude that heat associated with the formation of 100.0 g of carbon dioxide is 1563.2 kJ.

7 0
3 years ago
A substance that readily burns when it comes into contact with a flame has the chemical property of _____.
Paha777 [63]

A substance that readily burns when it comes into contact with a flame has the chemical property of reactivity. The answer is letter C. Reactivity is a chemical property of a substance. According to EPA regulations, it is normally unstable and readily undergoes violent change without detonating. it can explode or violently react when exposed to water, when heated, or under STP.

8 0
3 years ago
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Help Me Please I would really appreciate it!!!!
QveST [7]

Answer:

How much sunlight each flashlight gets (or doesn't get)  

Explanation:

The independent variable is the variable that the investigator changes.  

You are controlling the amount of sunlight each flashlight gets (or doesn't get).

B is wrong. The amount of decay is the dependent variable.

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3 years ago
How many grams of NA required to react with 75.0 gramsof CL2?
noname [10]
Cl2 has a molar mass of 71g/mole.
75g/71g/mole=1.06moles of cl2
2Na+Cl2→2NaCl
therefore, for every one mole of cl2 there are 2 moles of Na.
1.06*2=2.12moles of Na
every mole of Na is 22.98g
2.12moles *22.98g/mole= 48.72g Na

answer is 42.72grams
7 0
3 years ago
What is the molar massofiron?
Virty [35]
Molar Mass is the mass of a given substance, referring to the Atomic Weight of elements. Therefore, the Molar Mass of Iron (Fe) would be 55.845 gmol-1
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3 years ago
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