Use the chemical equation to complete the activity.
4Fe + 3O2 → 2Fe2O3
Iron (Fe) reacts with oxygen (O2) to form iron oxide. A scientist adds 15.4 grams of Fe to 3.6 grams of O2 to start the reaction. All of the iron and oxygen react to form iron oxide. Explain in detail how you can determine how many grams of iron oxide will be produced.
Use the law of conservation of matter in the explanation.
Answers
Answer:
14.54 g Fe2O3
Explanation:
The first step would be to balance the equation but since it's already balanced we don't have to worry about that.
Through the balanced equation, you can find the stoichiometry of the reaction, that is:
4 moles of Fe, react with 3 moles of O2, to produce 2 moles of Fe2O3
Chemistry (accurately stoichiometry) is all about ratios and proportions. The balanced equations gives you the standard ratio by which moles are produced.
So the next step (shown in the paper), is to convert the grams that are giving you in Moles, and you do this by dividing the number of grams given by the molar mass of the substance. The molar mass is the number of grams by which you can find exactly 6.022x10²³ molecules (one mole) of one specific substance.
15.4 g of Fe= 0.28 mol Fe
3.6 g of O2= 0.11 mol O2
Now that you have the quantity of moles, what you need to do is to look for the limitant reactant.
In a balanced equation, the number of moles in the reactants are the rules and they're gonna react completely with each other. If you want x quatity of reactants to react completely, then you will have to respect the proportion to the ratio given in the balanced equation.
But you will rarely follow the proportion so there will usually be a reactant that's gonna be limiting the reaction and one that is in excess. And how do you find this? Well, the easiest way to do it is:
Dividing the number of moles obtained by x element the coefficients of that element in the balanced equation. The one that has the smallest ratio, is the limitant reactants.Since the limitant reactant is gonna be limiting the reaction, all the stoichiometric procedures should be calculated through it, and in this case, the limitant reactant is O2.
But then how to establish the stoichiometric rule to find the number of Iron oxide (III) that's being produced?
Look back to the stoichiometry of the reaction:
To produce 2 moles of Fe2O3, you need 3 moles of O2.
But you have 0.11 mol O2.
Then establish a factor of conversion (shown in the picture)
The result is 0.07 mol of Fe2O3, but you need the answer in grams so you find the molar mass of Fe2O3 and then multiply it by the number of moles (0.07)
The answer is 14.54 g of Fe2O3
CHEMISTRY IS ALL ABOUT PROPORTIONS :D
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O A. 3.50 g
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Answers
Answer:
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Answer:
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im pretty sure you divide the mass value by 1000 to get you answer.
A sample of nitrogen gas at STP has a volume of 65.8 L. What is the mass of the gas?
A)
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Answers
Answer:
B. compound
Explanation:
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An endothermic reaction occurs when water and ammonium nitrate are combined. Which of the following statements correctly
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OB. Energy is absorbed because the reactants have more chemical energy than the products,
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Answers
Answer:
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Answer:
When your kidneys are damage waste products and fluid can build up in your body. That can cause swelling in your ankles nausea weakness poor sleep and shortness of breath. so without treatement the damage can get worse and your kidney may eventually stop working.Please I need helppppp
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Answer:
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Explanation:
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FeCl_{2} +H_{2} S- > FeS + 2HClFeCl 2 +H 2 S−>FeS+2HCl
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Answers
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[tex]x_{N_2}=\frac{0.781*14.0067g/mol*2}{28.9647g/mol} =0.755[/tex]
Then, we recall the Dalton's law version that relates total pressure, partial pressure and mole fraction written for nitrogen:
[tex]P_{N_2}=x_{N_2}P[/tex]
Finally, we plug in the previously calculated mole fraction and the total pressure of air to obtain:
[tex]P_{N_2}=0.755*0.987 atm\\\\P_{N_2}=0.746atm[/tex]
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Answers
Answer:
Solid, liquid, and gas are common states of matter. Because each particle is attached to several others, individual particles cannot move from one location to another, and the solid is rigid. A has a fixed volume but does not have a fixed shape. Liquids take on the shape of the container they are in.
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Answer:
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HELP ME PLEASE HURRY
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Reaction B: Protons are lost by the atom of an element.
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Answer:
D is correct
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A
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I will give thanks, profile thanks, brainliest and 5 star
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Answer:
E ) C2N2H8
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Answer:
D. A burning candle. (chemical energy into energy of heat and light, i.e. thermal and wave)
Explanation:
comment and tell me if it right.
The situation in which chemical energy being converted to another form of energy is a burning candle.
So, option D is correct one.
What is chemical energy?The energy produce by the chemical reaction is called chemical energy.
Example: burning of candle.
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Answer:
Why does increasing the flow rate reduce the contribution of longitudinal diffusion to total plate height? Increasing the flow rate decreases the time the solute resides in the column, resulting in less diffusional broadening.
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Answer:
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Answer:
Definitely not. This is because the alkaline earth metal [basically group 2 elements] are reactive and will react with the contents of the can, contaminating it.
No, alkaline earth metals would not be a good replacement for tin in a tin can because alkali from alkaline earth metals react with tin and release hydrogen.
What are alkaline earth metals?Alkaline earth metals are present in group 2 of the periodic table. They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).
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These metals have 2 electrons in their outer shell, and they are highly reactive, so they will react with the tin in a tin can.
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The bowl of fruit has a mass of 2.2 kg.
What net force must act on the bowl of fruit to make it accelerate to the right
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A. F = 9.68 N right
B. F = 9.68 N left
C. F = 6.60 N left
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Answers
Taking into account the Newton's second law, the correct answer is option A. F = 9.68 N right
In first place, acceleration in a body occurs when a force acts on a body.
Newton's second law states that a force will change the speed of an object because the speed and/or direction will change. These changes in velocity are called acceleration.
So, Newton's second law defines the relationship between force and acceleration mathematically. This law says that the acceleration of an object is directly proportional to the sum of all the forces acting on it and inversely proportional to the mass of the object
Mathematically, Newton's second law is expressed as:
F= m×a
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F = Force [N] m = Mass [kg] a = Acceleration [m/s²]In this case, you know:
F= ? m= 2.2 kg a= 4.4 m/s²Replacing in Newton's second law:
F= 2.2 kg× 4.4 m/s²
Solving:
F= 9.68 N
Finally, As the bowl of fruit accelerates to the right, the correct answer is option A. F = 9.68 N right
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An atom or molecule with an electrical charge.
c.
The outermost shell of an atom.
Answers
The outermost shell of an atom is known as a valence shell.
An atom with an extra neutron is an isotope.
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what part of the digestive system is labeled by the number 1?
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Answer:
I got it Right in Study Island
Explanation:
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Answers
Answer:
Composting, recycling, technological development, water cycle and photosynthesis are changes that have good effects. Some changes have bad effect like pollution and destruction of habitat and lose of lives.
Explanation:
hope it helps