Answer:
5.09 moles of Fe is required to react with 3.82 moles of O₂.
0.326 moles of O₂ are needed to produce 34.7 grams of Fe₂O₃.
Reaction stoichiometry
In first place, the balanced reaction is:
4 Fe + 3 O₂ → 2 Fe₂O₃
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Fe: 4 moles
O₂: 3 moles
Fe₂O₃: 2 moles
The molar mass of the compounds is:
Fe: 55.85 g/mole
O₂: 32 g/mole
Fe₂O₃: 159.7 g/mole
Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
Fe: 4 moles ×55.85 g/mole= 223.4 grams
O₂: 3 moles ×32 g/mole= 96 grams
Fe₂O₃: 2 moles ×159.7 g/mole= 319.3 grams
Moles of Fe needed
The following rule of three can be applied: If by stoichiometry of the reaction 3 moles of O₂ react with 4 moles of Fe, 3.82 moles of O₂ react with how many moles of Fe?
moles of Fe= 5.09 moles
Finally, 5.09 moles of Fe is required to react with 3.82 moles of O₂.
Moles of O₂ needed
The following rules of three can be applied: If by reaction stoichiometry 319.3 grams of Fe₂O₃ are formed from 3 moles of O₂, 34.7 grams of Fe₂O₃ are formed from how many moles of O₂?
moles of O₂= 0.326 moles
Finally, 0.326 moles of O₂ are needed to produce 34.7 grams of Fe₂O₃.
Explanation:
which of the following provide evidence of plate motion?
A. shapes of the continents
B. fossil s of the same species found on multiple continents
C. the age distribution of basalt at mid ocean ridges
D. the size of the continents
Answer:
The following evidences of plate motion are:
offset of rocks along the San Andres fault.
the age distribution of basalt at mid-ocean ridges.
the age distribution of the Hawaiian Islands
Find the formula for the hydrate
0.737 g MgSO3 and 0.763 g H2O
The required formula of hydrate is MgSO₃.6H₂O.
How do we calculate the formula of hydrate?The number of moles of water per mole of anhydrous solid (x) will be computed by dividing the number of moles of water by the number of moles of anhydrous solid (x) to find the hydrate's formula.
Moles will be calculated as:
n = W/M, where
Moles of MgSO₃ = 0.737g / 104.3g/mol = 0.007mol
Moles of H₂O = 0.763g / 18g/mol = 0.04 mol
Number of H₂O molecule = 0.04/0.007 = 5.7 = 6
So formula of hydrate is MgSO₃.6H₂O.
Hence required formula of hydrate compound is MgSO₃.6H₂O.
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Gatorade
Which of the following is NOT a unit used to measure gas pressure? *
O liters (L)
Omillimeters of mercury (mmHg)
Oatmospheres (atm)
Okilopascals (kPa)
Answer:
liter
Explanation:
liter is the unit of liquid
What is the molarity of .200 L of solution in which 2.0 moles of sodium bromide is dissolved?
Answer:
it’s 10ml
Explanation:
200/2 = 10
Based on the kinetic theory, which statement is true? (5 points)
O Matter consists of only large molecules.
Matter is made up of only charged particles.
The particles of matter have zero kinetic energy and potential energy.
O The particles of matter are arranged in different ways for the different states.
Answer:
the particles of matter are arranged in different ways for the different states
Explanation:
because solid liquid and gas all three matters have different states for example the particles in a solid are closely packEd and form of movement is vibration
What are compounds?
O heterogeneous mixtures
O pure substances
O homogeneous mixtures
Compounds are pure substances the are composed of two or more elements chemically bonded. Compounds have a definite composition, so they are the same throughout, which makes them homogeneous.
What does the word transfer mean?
A. To move from one place to another
B. To block energy flow
C. To move for a new job
D. To move to a warmer place
Group of answer choices
Answer: i think its A.
Explanation: hope it helps :>
Acids and bases are both what?
Answer:
Both acids and bases are electrolytes which means that they're good conductors of electricity. Acids and bases both produce ions in water solution. Acids release hydrogen ions (H+) whereas Bases release hydroxide ions (OH-). The process of mixing acid or a base in water is an exothermic one.
Answer:
Electrolytes
Explanation:
Both acids and bases are electrolytes which means that they're good conductors of electricity. Acids and bases both produce ions in water solutions. Acids release hydrogen ions (H+) whereas Bases release hydroxide ions (OH-). The process of mixing acid or a base in water is an exothermic one.
a student wants to fry an egg in a 1,770 g iron skillet. an egg will become firm at 70 degrees Celsius. the specific heat capacity of iron is 0.444. if the skillet begins at room temperature of 25 degrees Celsius, what is the minimum amount of energy that must be transferred to the skillet in order to fry the egg.
What is a neutralization reaction?
Complete the chart on the characteristics of bonds
Answer:
Face value. Corporate bonds normally have a par value of $1,000, but this amount can be much greater for government bonds.
Interest. ...
Coupon or interest rate. ...
Maturity. ...
Issuers. ...
Rating agencies. ...
Tools and tips.
What happens to the pressure and the molecules inside a unicycle tire that is being pumped up?
A. The pressure decreases, and the molecules slow down.
B. The pressure increases, and the molecules collide with the tire's inner surface.
C. The pressure increases, and the molecules slow down.
D. The pressure decreases, and the molecules collide with the tire's inner surface.
Write a conversion factor that converts between moles of calcium ions in calcium phosphide, Ca3P2, and moles of Ca3P2.
The conversion factor between moles of calcium ion and moles of [tex]Ca_3P_2[/tex] in [tex]Ca_3P_2[/tex] would be 3 to 1.
Mole fraction[tex]Ca_3P_2[/tex] if formed from 3 carbon atoms and 3 phosphate atoms according to the equation:
[tex]3Ca + 2P --- > Ca_3P_2[/tex]
Thus, there are 3 moles of calcium in every 1 mole of [tex]Ca_3P_2[/tex].
The conversion factor between moles of calcium and moles of [tex]Ca_3P_2[/tex] will. therefore, be 3 to 1 or simply 3:1.
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What’s the solution to this
you have separate solutions of a monoprotic, diprotic, and triprotic acid which each have the same concentrations in terms of molarity. you wish to neutralize a solution of calcium hydroxide. which acid solution would require more volume to neutralize the base?
a)monoprotic solution
b)diprotic solution
c) triprotic solution
d) you need to know the exact acid concentration to answer this question
e) you need to know the exact volume and concentration of the base solution to answer this question
Answer:
I think it's d but I'm not 100% sure
Explanation:
what are levers used for? (science)
According to the research, levers are used to modify or generate a force and transmit displacement.
What are levers?It is a simple machine composed of a rigid bar of some moderately resistant material, which rotates freely on a support point.
It can be used to maximize the mechanical force applied to an object, increasing its speed or the distance it travels, by applying a proportionally smaller amount of force.
Therefore, we can conclude that according to the research, levers are used to modify or generate a force and transmit displacement.
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What state of matter is it ?
Answer:
aqueous
Explanation:
How many moles of fluorine atoms are present in a sample that contains 4.14 moles of ?
SF4 mol
Answer:
The Avogadro number
One mole of atoms contains 6 x 10 23 atoms, no matter what element it is
Explanation:
A majority of your diet should be 1
vegetables and protein 2. vegetables and fats 3. fruits and vegetables 4. fruits and fats
Answer:
Veggie and proteins
Explanation:
At least based on US govt. recommendation we have to have more veggies and proteins and then fruits.
https://en.wikipedia.org/wiki/MyPlate
Answer:
C. fruits and vegetables
Explanation:
i got it correct on my test i hope you do too. have a good day
Question 2 of 32
Which best describes what happens during a typical energy conversion?
O A. Some energy is destroyed.
OB. Some energy is created.
C. The total amount of all forms of energy stays the same.
OD. Some mass changes into energy, and some energy changes into
mass.
Charle's Law
At 225 °C a gas has a
volume of 400 mL. What is
the volume of this gas at 127
°C?
Given:
Unknown:
Formula:
Solution:
Final answer:
Convert temperature to Kelvin
225°C=498K127°C=400KConvert vol to L
400mL=0.4LApply Charles law
V1T_2=V2T_10.4(400)=498V_2160=498V_2V_2=0.32L=320mLAnswer:
Given:[tex]V_{1} = \text{400.0 mL}[/tex]
[tex]T_{1} = 225.0^{\circ}\text{C + 273.15 = 498.15 K}[/tex]
[tex]T_{2} = 127.0^{\circ}\text{C + 273.15 = 400.15 K}[/tex]
Unknown:[tex]V_{2}[/tex]
Solution:[tex]\dfrac{V_{1}}{T_{1}} = \dfrac{V_{2}}{T_{2}}[/tex]
[tex]V_{2} = V_{1} \times \dfrac{T_{2}}{T_{1}}[/tex]
[tex]V_{2} = \text{400.0 mL} \times \dfrac{\text{400.15 K}}{\text{498.15 K}}[/tex]
[tex]\boxed{V_{2} = \text{321.3 mL}}[/tex]
Therefore, the volume of the gas at 127.0°C is 321.3 mL
[tex]\begin{gathered}\\\end{gathered}[/tex]
name the three crystalline forms of carbon
Answer:
Diamond.
Graphite.
Fullerene
Explanation:
these are three crystalline forms of carbon.
advantage of fossil fuels
Answer:
I don't know
Explanation:
I don't know the answer but it is use for car
The drawing shows a chemical reaction between hydroxide and bromomethane to produce methanol and bromide ion. The middle drawing is the activated complex. The reaction is exothermic.
Which species has the lowest energy?
A
B
C
Item 4
Item 4
Answer:
C.
Explanation:
Exothermic means the energy of products is lower than energy of reactants. Transition state will always be the highest energy among the two.
These three gases, Helium, Neon, and Argon all have one property in common because they are gases at room temperature. That is they:
They have no definite shape and no definite volume because they are gases.
How gases have no definite and volume?Gases have no definite shape and no definite volume because they are present in free state. Those substances that are close together and held tightly have definite shape and volume.
So we can conclude that they have no definite shape and no definite volume because they are gases.
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What other organisms feed on the same material?
Answer:
A heterotroph is an organism that eats other plants or animals for energy and nutrients. The term stems from the Greek words hetero for “other” and trophe for “nourishment.”
Pb+FeSO4⇒PbSO4+Fe is what kind of reaction?
Answer:
This is a displacement reaction.
Explanation:
The reaction where a part of the reactant is replaced by another reactant is defined as a displacement reaction. In this reaction, Fe of the reactant is displaced or replaced by another reactant Pb to form lead sulfate. So, this is an example of a displacement reaction.
2KCIO3 -> 2KCI + 302
For the reaction shown here, calculate how many moles of reactants are needed to produce 96 grams of oxygen gas as a product.
A) 1
B) 2
C) 3
D) 4
Moles of oxygen
Given mass/molar mass96/323mol2 mol reactants required for 3mol O_2
So our answer is 2
What are the values ?
The following data was collected when a reaction was performed experimentally in the laboratory. Reaction Data Reactants Products Fe2O3 Al Al2O3 Fe Starting Amount in Reaction 3 moles 5 moles ? ? Determine the maximum amount of Fe that was produced during the experiment. Explain how you determined this amount.
The maximum amount, in grams, of Fe that would be produced during the experiment, will be 280 grams
Sotichiometric calculationFrom the equation of the reaction:
[tex]Fe_2O_3 + 2Al -- > 2Fe + Al_2O_3[/tex]
The mole ratio of [tex]Fe_2O_3[/tex] to Al is 1:2.
But 3 moles and 5 moles of reactants respectively started the reaction. Thus, Al is limited in availability and will determine the amount of products that will be produced.
The mole ratio of Al and Fe is 1:1, therefore, a maximum of 5 moles of Fe will be produced from the reaction.
5 moles Fe = 5 x 56 = 280 grams
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