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3 years ago

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Study the chemical reaction below and answer the questions that follow: 8Al + 3Fe₃O₄ → 4Al₂O₃ + 9Fe How many moles of iron would

be produced if 4.0 moles of aluminum reacts with an excess of Fe₃O₄?
A. 4.0 moles
B. 4.5 moles
C. 8.0 moles
D. 9.0 moles

1 answer:

julia-pushkina [17]3 years ago

3 0

Answer: the answewr is A. hope this helps!

Explanation:

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Please help me answer this I will be very grateful if so :)

dimaraw [331]

The molecules in system #2 have a higher kinetic energy because they are at a higher temperature than molecules in system#1.

<h3>Heating of water molecules</h3>

Temperature is defined as a measure of the average kinetic energy of the molecules of a body. The higher the temperature of a body, the higher the kinetic energy of the molecules of the body.

In both systems, we have water molecules that have the same formula H2O. However, the molecules in system #2 have a higher kinetic energy because they are at a higher temperature than molecules in system#1.

Learn more about kinetic energy of molecules: brainly.com/question/2731193

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a person touch a large chunk of ice with their hands and remarks. this is making me cold explain wat this person felling. is the

k0ka [10]

There is both. the persons body heat transfers to the ice while the cold transfers off the ice to the persons hand. thats why when you hold and ice cube for a long enough time it melts because your body heat melts it, while at the same time your hand starts to get colder.

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3 years ago

Which element has 32 protons in its nucleus? phosphorus cobalt germanium sulfur

vovangra [49]

Answer:

Germanium.

Explanation:

In a neutral atom: the number of protons = the number of electrons.

Atomic number of a neutral atom = number of electrons = number of protons.

Phosphorous is an element with atomic number 15 and thus contains 15 electrons and 15 protons.

Cobalt is an element with atomic number 27 and thus contains 27 electrons and 27 protons.

<em>Germanium is an element with atomic number 32 and thus contains 32 electrons and 32 protons.</em>

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Sulfur is an element with atomic number 16 and thus contains 16 electrons and 16 protons.

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Although both N2 and 02 are naturally present in the air we breathe, high levels of NO and NO2 in the atmosphere occur mainly in

joja [24]

Answer:

(a) Increasing the temperature adds heat which is a reactant shifting the equilibrium rightwards.

(b) Pressure has no effect since the change in the number of moles is zero.

Explanation:

Hello,

In this case, one could represent the given reaction as:

$N_2(g)+O_2(g)+ \Delta _rH \leftrightarrow 2NO$

Since it is endothermic. Thus, solving the (a) statement, one identifies the heat as a reagent, that is why the reaction cools down as it progress, therefore, by increasing the temperature, heat is added, that is, a reagent is added, which shifts the equilibrium rightwards, in other words, more NO is produced so its concentration increases.

Furthermore, for the (b) statement, since the change in the number of moles is zero, based on the stoichiometric coefficients as shown below:

$\Delta \nu =2-1-1=0$

Such value implies that the pressure has no effect on the concentration, taking into account the following form of the law of mass action:

$Kp=Kc(RT)^{\Delta \nu }$

Thus, since $\Delta \nu =0$ , $Kp=Kc$ , so no effect in concentration is due to the pressure.

Best regards.

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antiseptic1488 [7]

When mentos and diet coke are mixed, the diet soda explodes

Explanation:

Due to the fact that the mentos are dense, they sink to the bottom of the bottle which gives the diet coke its explosion.

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