The mass of phosphate ions are present in 25.8 g of tin (IV) phosphate is 13.3 g/mol.
What is phosphate ?An anion, salt, functional group, or ester produced from phosphoric acid is referred to as a phosphate in chemistry. Most frequently, it refers to orthophosphate, a product of orthophosphoric acid H 3PO 4. The elimination of three protons H+ results in the formation of the phosphate or orthophosphate ion [PO 4]3 from phosphoric acid.
Phosphate in excess can be harmful. It can impair the body's utilization of iron, calcium, magnesium, and zinc and result in diarrhea, calcification (hardening) of organs and soft tissue.
25.8 g of Sn₃(PO₄)₄
mol.wt of Sn₃(PO₄)₄ is 736.015
no. of mole of Sn₃(PO₄)₄= 25.8/736.015 moles
Sn₃(PO₄)₄ has 3 Sn⁴⁺ and 4(PO₄)³-
so, no. moles of (PO₄)³- = 4 * 0.0351
= 0.1402
mol.wt of (PO₄)³- is 95g/mol
mole = wt/ mol.wt
wt = 0.1402 *95
= 13.3 g/mol
Thus, The mass of phosphate ions are present in 25.8 g of tin (IV) phosphate is 13.3 g/mol.
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1. How much heat does a 23.0 g ice cube absorb as its temperature
increases from -17.4°C to 0.0°C? Give the answer in both joules and
calories.
Heat absorbed in joule is 845.46 j
Heat absorbed in calorie = 191.69 calorie
In what ways do temperature fluctuations and heat relate?The average molecular kinetic energy will fluctuate when a system gains or loses heat. As long as the system is not going through a phase shift, heat transfer causes a change in temperature in the system.
Which chemical process absorbs heat?Every chemical reaction that absorbs heat from its surroundings is an endothermic reaction. The energy that is absorbed serves as the reaction's activation energy. It feels frigid, which is a defining feature of this kind of reaction.
When calculating heat absorption, the specific heat of ice and the equation ΔH=cp×m×ΔT
cp (ice) =2.06J/g °C
m = mass of ice
Heat absorbed in joule = 2.06×23×(0-(-17)
= 845.46 j
1 joule= 0.238 calorie
Heat absorbed in calorie = 191.69 calorie
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Why would an atom emit particles or waves from its nucleus?
A. None of these
B. If it has been part of a single replacement reaction.
C. If it has been part of a double replacement reaction.
D. To create a more stable nucleus.
An atom emits particles or waves from its nucleus to create a more stable nucleus. The correct option is D.
What is an atom?An atom is a divisible substance that contains subatomic particles like electrons, protons, and neutrons. The atoms are the smallest unit of matter that made every element. The atom also contains a nucleus, the electrons revolve around the nucleus.
An atom is full of electrons, and when an atom emits energy when an electron changes its level and moves near to the nucleus.
An atom emits a wave or particle to become more stable than before because it lowers its energy. More energy leads to the instability of the atom.
Thus, the correct option is D. To create a more stable nucleus.
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What is the average atomic mass of 10 hydrogen -1 molecules?
Answer:
1.674 x 10^-23 grams
Explanation:
Hydrogen-1 is called Protium
wikipedia
atomic mass of Protium is 1.00794 amu
sciencedirectcom
atomic mass of 10 Protiums is 10.0794 amu
10.0794 amu in grams is
1.6737236x10^-23 grams
Pls help I’ll brainlest and add extra points
Answer:
a top predator, fighting
A sample of a gas has a volume of 1.5L at 150K. If the gas is heated to 235K at constant pressure, what will its final volume be
Answer:
2.35 L
Explanation:
From Charles Law
Applying,
V/T = V'/T'................. Equation 1
Where V = Initial volume of the gas, V' = Final volume of the gas, T = Initial Temperature of the gas, T' = Final temperature of the gas.
Make V' the subject of the equation
V' = VT'/T............... Equation 2
From the question,
Given: V = 1.5 L, T = 150 K, T' = 235 K,
Substitute these values into equation 2
V' = (1.5×235)/150
V' = 2.35 L
Hence the final volume of the gas is 2.35 L
Calculate the mass/volume percent (m/v) of 16.0 g NaCl in 50.0 mL of solution.Express your answer to three significant figures.
Answer
The mass/volume percent = 16/50 x 100% = 32%
Explanation
Given:
Mass of NaCl, m = 16.0 g
Volume of solution, v = 50.0 mL
What to find:
The mass/volume percent.
Solution
The mass/volume percent of the solution can be calculated using the formula below
\(Percent\text{ }mass\text{/}volume=\frac{Mass}{Volume}\times100\%\)The mass/volume percent = 16/50 x 100% = 32%
A 0.250 mol sample of gas at 35.0°C exerts a pressure of 700 torr in it's container. What pressure will the container exert if the volume expands to 10.0L and the temperature is cooled to 5.0°C?
1. A chemical reaction is taking place between two reactants dissolved in a liter of water. If an
additional liter of pure water is added to the reaction mixture, what will be the effect on the
reaction rate?
Answer: The reaction rate will DECREASE.
Explanation:
Chemical reaction occurs through the combination of chemical reactants to form new products. The rate if this reaction is affected by the following factors:
- the chemical nature of the reacting substances,
- the state of subdivision (one large lump versus many small particles) of the reactants,
- the temperature of the reactants,
- the concentration of the reactants, and
- the presence of a catalyst.
When additional liter of pure water is added to the reaction mixture, collision between reactant molecules is reduced The dilution causes the concentration of the reactants to reduce. This in turn affects the rate of chemical reactions as the decreased concentration of reactants leads to a decrease in the reaction rate.
Deduce the identity of the following compound from the spectral data given. C3H4BrN: H NMR, δ 2.98 (2H, triplet), 3.53 (2H, triplet) 13C NMR, δ 21.05 (triplet), 23.87 (triplet), 118.08 (singlet) (ppm):JR, 2963, 2254 cm" Express your answer as a chemical formula.
Answer: Br-CH₂-CH₂-C≡N (3-bromopropanenitrile)
Explanation:
The question tells us to " Deduce the identity of the following compound from the spectral data given. C3H4BrN: H NMR, δ 2.98 (2H, triplet), 3.53 (2H, triplet) 13C NMR, δ 21.05 (triplet), 23.87 (triplet), 118.08 (singlet) (ppm):JR, 2963, 2254 cm" Express your answer as a chemical formula".
Answer: Another Alternative to this is seen below
The Double Bond Equivalent of C₃H₄BrN = 3+1-4/2-1/2+1/2 = 2
2254 cm-1 Vc ≡N [IR analysis]
2963.4 = sp³Vc-H streek [IR analysis]
N≡C-CH₂-CH₂-Br (C₃H₄NBr)where the first CH₂ = b = 2.98 (2H,triplet) and
the second CH₂ = a = 3.53 (2H,triplet)
Note: where both are 1HNMR.
N≡C-CH₂-CH₂-Br
where C = c = 118.08 (singlet)
CH₂ = b = 21.05 (triplet)
CH₂ = a = 23.87 ( triplet)
Note: where all are 13CNMR
Important:
I have attached a copy of the solution to enhance better understanding in case the typed solution isn't clear enough.
Who ever does this, get brainiest.
Answer:
C.
Explanation:
They will need to know the influence of gravitational force on objects because gravity can affect an objects weight.
what is the example of the theory of needs by jean Baptiste de lamark
Answer: Jean Baptiste de Lamarck is a famous biologist known for his theory of evolution. While he is known for his theory of inheritance of acquired characteristics, he also proposed a theory of needs to explain the evolutionary process.
According to Lamarck's theory of needs, animals have specific needs that arise due to changes in their environment. For example, if an animal lives in an area with tall trees, it may need to stretch its neck to reach the leaves for food. Over time, Lamarck believed that this need would cause the animal's neck to lengthen, and this acquired trait would be passed down to its offspring.
One example of Lamarck's theory of needs can be seen in the evolution of the giraffe. Lamarck proposed that the giraffe's long neck evolved due to a need to reach high branches for food. According to his theory, over time, the giraffe's neck lengthened as a result of this need, and this acquired trait was passed down to future generations, eventually resulting in the long-necked giraffes we see today.
However, it is important to note that Lamarck's theory of needs has been largely discredited in modern evolutionary theory, which relies on the principles of natural selection and genetic mutation to explain the process of evolution.
Explanation: i would reallyyyyyyy apreciate brainliest
suppose that 9:00 am the temperature of a room is 18 ℃ , and at noon it is 24℃. WHat was the increase in temperature?
The temperature increased by 6 ℃.
We have the temperature of room for two different time spans - morning and noon.
We have to determine the increase in temperature from morning to noon.
What is Temperature ?Temperature is the degree or intensity of heat present in a substance or object, especially as expressed according to a comparative scale and shown by a thermometer or perceived by touch.
According to the question -
Temperature in morning = 18 ℃
Temperature at noon = 24℃
Increase in temperature = 24 - 18 = 6 ℃
Hence, the temperature increased by 6 ℃.
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. Sulphuric acid (H2SO4) is extremely corrosive to skin. *
O Analytical Chemistry
Physical Chemistry
Biochemistry
O Inorganic Chemistry
The fact that sulphuric acid is extremely corrosive to skin is a part of physical chemistry (option B).
What is physical chemistry?Physical chemistry is the science that uses theories and techniques from physics to study chemical systems.
Physical chemistry blends the principles of physics and chemistry to study the physical characteristics, or properties, of molecules.
According to this question, the corrosive feature of sulphuric acid is a physical attribute of the substance, hence, it is studied under physical chemistry.
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What happens to the amount of solution when we add food colour to it?
Answer:
We need more? What else is in the question? This is unanswerable.
Explanation:
Assignment Your Unde a professor in a University has Sent you an touration 6 his Inaugural lectore wate a letter to him, showing appreciation for him on halind gesture and Congratulating! his achievements So far
In this letter, express gratitude to your uncle, a university professor, for his invitation and congratulate him on his achievements.
Here are the steps to be followed:
By following these steps, you can write a thoughtful and appreciative letter to your uncle, expressing your gratitude for his invitation and congratulating him on his achievements.
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scientist wants to use a model to help present the results of his detailed scientific investigation.
Why would a model be useful?
because the model makes the concepts easier to understand
because the model is easy to put together and to use
because the model prevents other scientists from asking questions
because the model requires the audience to pay full attention to it
Answer: A model would be useful because the model makes the concepts easier to understand.
Explanation:
Models are helpful tools in science education that can be used to enhance explanations, spark discussion, make predictions, provide visual representations of abstract concepts, and create mental models.
Iron and Chlorine gas react according to the following balanced equation: 2 Fe(S) + 3 Cl2 (g) 2 FeCl3(s) a) Calculate the molar mass in grams of “one mole” of each of the following: Fe ________ Cl2 __________________ FeCl3 ______________
The molar mass in grams of "one mole" of each substance is:
Fe: 55.845 g/mol
\(Cl_2\): 70.906 g/mol
\(FeCl_3\): 162.204 g/mol
To calculate the molar mass in grams of "one mole" of each substance, we need to determine the atomic masses of the elements involved in the equation.
The atomic mass of iron (Fe) is 55.845 g/mol.
For chlorine (\(Cl_2\)), we need to consider that the molar mass of \(Cl_2\) is twice the atomic mass of chlorine because the formula shows that two chlorine atoms combine to form one molecule of \(Cl_2\). The atomic mass of chlorine is 35.453 g/mol, so the molar mass of \(Cl_2\) is 2 * 35.453 g/mol = 70.906 g/mol.
The formula for iron(III) chloride (\(FeCl_3\)) indicates that one mole of \(FeCl_3\)contains one mole of iron and three moles of chlorine. Therefore, we can calculate the molar mass of \(FeCl_3\)by summing the atomic masses of iron and chlorine:
Molar mass of \(FeCl_3\)= (1 * atomic mass of Fe) + (3 * atomic mass of Cl)
Substituting the values, we have:
Molar mass of \(FeCl_3\) = (1 * 55.845 g/mol) + (3 * 35.453 g/mol)
= 55.845 g/mol + 106.359 g/mol
= 162.204 g/mol
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oxidation number of Ag in Ag2O
The oxidation number of Ag in Ag2O is +1.
In Ag2O, there are two silver atoms (Ag) and one oxygen atom (O). Oxygen is known to have an oxidation number of -2 in most compounds. Since the compound is neutral, the sum of the oxidation numbers of all the atoms must equal zero.
Therefore, the oxidation numbers of the two silver atoms must add up to +2 to balance out the -2 oxidation number of the oxygen atom. Since there are two silver atoms, each silver atom must have an oxidation number of +1 to yield a total oxidation number of +2 for the compound.
In Ag2O, the silver atoms lose one electron each to form Ag+ ions. This results in an oxidation number of +1 for each silver atom. The oxygen atom gains two electrons from the silver atoms to achieve a stable octet configuration, resulting in an oxidation number of -2 for the oxygen atom. The compound Ag2O is formed through the transfer of electrons, with each silver atom exhibiting an oxidation number of +1.
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A solution is made by dissolving 38.81 grams of nickel (II) sulfate, NiSO4, in enough water to make 0.467
liters of solution. Calculate the molarity of this solution.
The molarity of the NiSO₄ solution made by dissolving 38.81 grams of nickel (ii) sulfate, NiSO₄, in enough water to make 0.467 liters of solution is 0.535 M
How do i determine the molarity of the solution?First, we shall obtain the mole of 38.81 grams of nickel (ii) sulfate, NiSO₄. Details below:
Mass of NiSO₄ = 38.81 grams Molar mass of NiSO₄ = 154.75 g/molMole of NiSO₄ = ?Mole of NiSO₄ = mass / molar mass
= 38.81 / 154.75
= 0.25 mole
Now, we shall determine the molarity of the solution. Details below:
Mole of NiSO₄ = 0.25 moleVolume of solution = 10.467 LMolarity of solution = ?Molarity of solution = mole / volume
= 0.25 / 0.467
= 0.535 M
Thus, the molarity of the solution is 0.535 M
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Solve the equation by first using the Quadratic Formula and then by factoring.
x2 – 14x + 48 = 0
How do scientists know how reconstruct a fossil?
Scientists will use the structure of existing animal as a model.
Each fossil piece fits together perfectly.
There are labels found in each of the fossil bones.
The location of each fragment found provides clues on how the animal looks.
A, Scientists will use the structure of existing animals as a model :)
Answer:
Scientists will use the structure of existing animal as a model.
Explanation:
-lukelaws
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what is the percent yield of NH3 when 15.0 grams of nitrogen gas react with an excess of hydrogen gas to produce 15.4 grams of NH3?
Answer:
84.6%
Explanation:
The percent yield of NH₃ when 15.0 grams of nitrogen gas reacts with an excess of hydrogen gas to produce 15.4 grams of NH₃ is 84.57%.
What is the percent yield?"Percent yield is the deviation in the percent of theoretical yield to the percent of actual yield."
Percent yield = actual yield / theoretical yield x 100
The chemical equation will be
N₂ + 3H₂ = 2NH₃
In the reaction, the limiting reagent is N₂, and the percent yield is calculated by the limiting reagent.
By the reaction, we can see that 1 mol of N₂ produces 2 mol of NH₃
28 grams of N₂ will produce 34 grams of NH₃
15.0 N₂ will produce 34 x 15 / 28 = 18.21 grams of NH₃
The actual yield is 15.4
The theoretical yield is 18.21
Percent yield = 15.4 / 18.21 x 100 = 84.57%.
Therefore, the percent yield of NH₃ is 84.57%.
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A music store manager counted the number of people who came into their store on Tuesday and divided them into groups of people younger than 20, 20 to 40, and older than 40. Which type of graph would be the best to use in order to display the data?
The type of graph that will be to display the data collected by the store keeper is bar graph.
What is bar graph?A bar graph can be defined as a chart or a graphical representation of data, quantities or numbers using bars or strips.
Also, a bar graph is a graph that shows complete data with rectangular bars and the heights of bars are proportional to the values that they represent.
Three bar graphs can be used to display the data collected by the store keeper.
First bar graph = people younger than 20Second bar graph = 20 to 40 yearsThird bar graph = people older than 40.Thus, the type of graph that will be to display the data collected by the store keeper is bar graph.
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Brainliest will be rewarded!
Option B, where [OH-] is 1.0 x 10-13 mol dm-³3, is the only one that can be considered basic. Therefore, Option B is the correct answer.
To determine whether a solution is basic or acidic at 25 °C, we can compare the concentration of hydroxide ions ([OH-]) with the concentration of hydronium ions ([\(H_3O\)+]). In a neutral solution, the concentrations of [\(H_3O\)+] and [OH-] are equal, resulting in a pH of 7.
Option A states that the concentration of [\(H_3O\)+] is 1.0 x 10-3 mol dm-3. Since [\(H_3O\)+] represents the concentration of hydronium ions, this solution would be acidic because the concentration of [\(H_3O\)+] is higher than [OH-], indicating an excess of hydronium ions.
Option B states that the concentration of [OH-] is 1.0 x 10-13 mol dm-³3. In this case, [OH-] is higher than [\(H_3O\)+], indicating an excess of hydroxide ions. Therefore, this solution would be considered basic.
Option C states that the solution has a pH of 4.00. A pH of 4.00 is below the neutral pH of 7, indicating an excess of hydronium ions and an acidic solution. Therefore, this option does not represent a basic solution.
Option D states that the concentration of [\(H_3O\)+] is 1.0 x 10-13 mol dm-3. Similar to Option A, this concentration of [\(H_3O\)+] indicates an acidic solution, not a basic one.
Option B
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Answer:
D is the correct answer
Explanation:
In order for a solution to be basic at 25 C, the H+ concentration has to be less than the OH- concentration, and given that H+ times OH- is 10^-14, we deduce that H+ must be less than 10^-7 for the solution to be acidic. Thus, A can be eliminated, and so can C. With B, we calculate an H+ concentration of 0.1M, which also fails to be less than 10^-7
Thus, D is the correct answer and we can verify that as H+ is less than 10^-7.
Note: I do not know why my previous answer was deleted for "being incorrect", and i'm not sure how the incorrect answer was "expert verified", but I am as certain that D is the correct answer as i am sure of 3*(4+5-1) being equal to 24.
Common coagulants (salts) used in conventional water treatment include the following alum (aluminum sulfate), sodium aluminate, ferric sulfate, ferrous sulfate, ferric chloride, and polymers. Question 1 options: True False
Answer:
True
Explanation:
This is the true statement .
Because There are two types of metal coagulants used : aluminium and iron.
The aluminum coagulants include aluminum sulfate, aluminum chloride and sodium aluminate.
The iron coagulants include ferric sulfate, ferrous sulfate, ferric chloride and ferric chloride sulfate.
Paulo is experimenting with H2O in its different states. He would like to present all the information he collected in one place. He thinks he should use a phase change diagram, but he isn't sure. What information could you give Paulo to encourage him to use a phase change diagram?
Paulo needs to use a phase diagram to show how much stable each of the various phases of water is.
What is the phase diagram?The phase diagram could be used to obtain the changes in a substance at different phases of matter. We know that water could exist as solid, liquid or gas. The state in which the water is a function of the pressure and the temperature of the system.
The phase diagram could be used to see the various conditions of temperature and pressure where we can trace to the liquid, solid and gaseous phases of the substance that is under study. On this phase diagram, we can also locate the triple point of water.
Given that the pressure and the temperature changes of water could be shown on a phase diagram, it then follows that Paulo needs to use a phase diagram to show the various phases of water.
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Homework Answered Due Today, 11:59 PM
The reaction 3H₂(g) + N₂(g) → 2NH3(g) has an enthalpy of reaction of -92.6 kJ/mol. If 1 g of hydrogen and 2 g of nitrogen are
reacted, how much heat is produced (kJ)?
The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ
How do i determine the heat energy produced?First, we shall obtain the limiting reactant. Details below:
3H₂ + N₂ -> 2NH₃
Molar mass of N₂ = 28 g/molMass of N₂ from the balanced equation = 1 × 28 = 28 g Molar mass of H₂ = 2 g/molMass of H₂ from the balanced equation = 3 × 2 = 6 gFrom the balanced equation above,
28 g of N₂ reacted with 6 g of H₂
Therefore,
2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂
We can see that only 0.43 g of H₂ is needed in the reaction.
Thus, the limiting reactant is N₂
Finally, we the amount of heat energy produced. Details below:
3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ
Molar mass of N₂ = 28 g/molMass of N₂ from the balanced equation = 1 × 28 = 28 gFrom the balanced equation above,
When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.
Therefore,
When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ
Thus the heat energy produced from the reaction is -6.61 KJ
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what is the answer to this^
Your answer would be D.
Identify the options below that are results of decreasing the temperature of a system that includes an exothermic reaction in the forward direction. A. The concentration of the reactants increases. B. The concentration of the products increases. C. The equilibrium constant decreases. D. The equilibrium shifts toward the products.
If the reaction is exothermic as described, a rise in temperature will thus trigger the opposite reaction, which will result in a decrease in the amount of the products and an increase in the number of reactants. The reverse outcome will occur if the temperature is lowered.
B. The concentration of the products increases.
A reaction is defined as exothermic if the overall standard enthalpy change (H) is negative. Exothermic processes typically produce heat. Exergonic reaction, which the IUPAC defines as "... a reaction for which the overall standard Gibbs energy change G is negative," is frequently mistaken with the phrase.
Because "H" contributes significantly to "G," a strongly exothermic process is typically also exergonic. Exothermic and exergonic chemical reactions make up the majority of the impressive demonstrations in schools.
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You may want to reference (Page) Section 12.4 while completing this problem. Enter the balanced chemical equation for the complete combustion of each of the following hydrocarbons found in gasoline used to start a fire:________.
Part A. liquid nonane
Express your answer as a chemical equation including phases.
Part B. liquid isopentane (2-methylbutane)
Express your answer as a chemical equation including phases.
Part C. liquid 3-ethyltoluene
Express your answer as a chemical equation including phases.
Answer:
See explanation
Explanation:
In this question, we have to remember that in all combustion reactions we will have Oxygen as reactive (\(O_2\)) and the products are Carbon dioxide (\(CO_2\)) and Water (\(H_2O\)). Additionally, for the states, we will have (l) for the liquid state and (g) for the gas state. So, we can analyze each reaction:
Part A.
The formula for nonane is \(C_9H_2_0\), with this in mind we can write the combustion reaction:
\(C_9H_2_0_(_I_)~ +~ O_2~->~CO_2_(_g_)~ +~H_2O_(_g_) \)
When we balance the reaction we will obtain:
\(C_9H_2_0_(_I_)~ +~14 O_2_(_g_)~->~9CO_2_(_g_)~ +~10H_2O_(_g_) \)
Part B.
The formula for 2-methylbutane is \(C_5H_1_2\), with this in mind we can write the combustion reaction:
\(C5H12_(_I_)~ +~O_2_(_g_)~->~CO_2_(_g_)~ +~H2O_(_g_) \)
When we balance the reaction we will obtain:
\(C5H12_(_I_)~ +~8O_2_(_g_)~->~5 CO_2_(_g_)~ +~6 H2O_(_g_) \)
Part C.
The formula for 3-ethyltoluene is \(C_9H_1_2\), with this in mind we can write the combustion reaction:
\(C_9H_1_2_(_I_)~+~O_2_(_g_)~->~CO_2_(_g_)~+~H2O_(_g_)\)
When we balance the reaction we will obtain:
\(C9H12_(_I_)~ +~12O_2_(_g_)~->~9CO_2_(_g_)~ +~6H2O_(_g_)\)
See figure 1 for further explanations.
I hope it helps!