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malfutka [58]
3 years ago
15

In the following unbalanced chemical reaction, what belongs in the blank? C8H18 + O2à CO2 + H2O + _________ A. CO B. CO3 C. ener

gy D. nothing
Chemistry
2 answers:
kakasveta [241]3 years ago
7 0

Answer:

C. energy

2C8H18 + 25O2 \rightarrow 16CO2 + 18H2O + energy

Explanation:

The balanced reaction is:

2C8H18 + 25O2 \rightarrow 16CO2 + 18H2O

This is essentially a combustion reaction in which a hydrocarbon such as octane in this case, reacts with oxygen to form carbon dioxide and water. Combustion reactions are exothermic  which implies that energy is released as the reaction progresses. Thus, the given reaction can be represented by adding the term 'energy' to the product side of the reaction:

2C8H18 + 25O2 \rightarrow 16CO2 + 18H2O + energy

Sergeu [11.5K]3 years ago
3 0
Your answer is C energy hope it helps:)
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GIVING BRAINLIEST One mole of hydrogen gas (H2), reacts with one mole of bromine Br2(g) to produce 2 moles of hydrogen bromide g
JulsSmile [24]

Answer:

The equation to show the the correct form to show the standard molar enthalpy of formation:

\frac{1}{2}H_2(g) +\frac{1}{2}Br_2(l)\rightarrow HBr(g) ,\Delta H_{f}^o= -36.29 kJ

Explanation:

The standard enthalpy of formation or standard heat of formation of a compound is the change of enthalpy during the formation of 1 mole of the substance from its constituent elements, with all substances in their standard states.

Given, that 1 mole of H_2 gas and 1 mole of Br_2 liquid gives 2 moles of HBr gas as a product.The reaction releases 72.58 kJ of heat.

H_2(g) + Br_2(l)\rightarrow 2HBr(g) ,\Delta H_{f}^o= -72.58kJ

Divide the equation by 2.

\frac{1}{2}H_2(g) +\frac{1}{2}Br_2(l)\rightarrow HBr(g) ,\Delta H_{f}^o= -36.29 kJ

The equation to show the the correct form to show the standard molar enthalpy of formation:

\frac{1}{2}H_2(g) +\frac{1}{2}Br_2(l)\rightarrow HBr(g) ,\Delta H_{f}^o= -36.29 kJ

4 0
3 years ago
_________feedback is a type of feedback in which a system is triggered to produce an output.
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Explanation:

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Answer:

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Explanation:

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So for 1, it would be negative, because it's pointing to an electron.  Electrons always have a negative charge.

So for 2, it would be positive, because it's pointing to a proton.  Protons always have a positive charge

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4 0
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Will mark brainliest :) how many moles of a solute is present in 4.00 L of an 8.30 M solution?
andreev551 [17]

The answer is 33.2 moles of a solute is present in 4.00 L of an 8.30 M solution , Option A is correct .

<h3>What is Molarity ?</h3>

Molarity is defined as the amount of solute (in moles)in per litre of solution.

It is also known as molar concentration of a solution , It is expressed in mol/l

\rm M =\dfrac{moles \;of\; solute}{Volume \;of \;solution} \\\\\\\rm M = \dfrac{n}{V} \\

We can rearrange this equation to get the number of moles:

n= M * V

The molarity of solution is 8.3 M and the volume given is 4 litres

the moles will be n = 8.30 * 4 = 33.2 moles

Therefore 33.2 moles of a solute is present in 4.00 L of an 8.30 M solution , Option A is correct .

To know more about molarity

brainly.com/question/2817451

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5 0
2 years ago
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