The balanced redox reaction between acidified potassium and iron two chloride is given as ,
5[tex]Fe^{+2}[/tex] + 1 [tex]MnO_{4} ^{- }[/tex] + 8 [tex]H^{+}[/tex]→ 5[tex]Fe^{+3}[/tex] ++ 1 [tex]Mn^{+2 }[/tex] + 4[tex]H_{2} O[/tex]
The reaction is spontaneous
Place these numbers as coefficients in front of the formulas containing those atoms.
[tex]Fe^{+2}[/tex] + [tex]MnO_{4} ^{- }[/tex] → [tex]Fe^{+3}[/tex] + [tex]Mn^{+2 }[/tex]
Balance all remaining atoms other than H and O
[tex]Fe^{+2}[/tex] + [tex]MnO_{4} ^{- }[/tex] → [tex]Fe^{+3}[/tex] + [tex]Mn^{+2 }[/tex]
Balance O.
Add enough H2O molecules to the deficient side to balance O.
We have 4O atoms on the left, so we need 4H2O
on the right.
5[tex]Fe^{+2}[/tex] + 1 [tex]MnO_{4} ^{- }[/tex] + 8 [tex]H^{+}[/tex]→ 5[tex]Fe^{+3}[/tex] + 1 [tex]Mn^{+2 }[/tex] + 4[tex]H_{2} O[/tex]
The reaction is spontaneous when the value of E ° for the reaction is positive .
E ° for [tex]MnO_{4} ^{- }[/tex]/ [tex]Mn^{+2 }[/tex] = 1.74 V
E ° = [tex]Fe^{+3}[/tex]/ [tex]Fe^{+2}[/tex] = 0.75 V
E ° for reaction = 1.74 V - 0.75 V = 0.99 V
Hence , E ° for reaction is positive .
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What is the formula for the molecule above? (Periodic table squares are provided below,
if you want them.)
A. H2
B. H2O
C.O2
D. H
Answer:
I believe H2.
Explanation:
It's H2 because there are two electrons on there being share by 2 atoms.
Since Hydrogen can only get a maximum of 2 electrons and no other atoms are present, that is why it's H2.
What is the mass (in grams) of 10.00 L of propane vapor (C3H8) at STP?
The mass (in grams) of 10.00 L of propane vapor ([tex]C_3H_8[/tex]) at STP is 19.668 g
One mole of gas requires 22.4 L of space at STP.
Moles of[tex]C_3H_8[/tex] = 10.0L/22.4L = 0.446 mol
Mass of [tex]C_3H_8[/tex] = 0.446×44.1 = 19.668 g
STP, or standard temperature pressure, refers to the nominal atmospheric conditions at sea level. The temperatures and pressures are 0 degrees Celsius and 1 atmosphere, respectively. In addition to other professionals, the STP value is crucial for physicists, chemists, engineers, pilots, and navigators.STP in chemistry is the abbreviation for Standard Temperature and Pressure. STP is most frequently employed for doing calculations for gases.To learn more about STP visit:
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Calculate the density in g/ml of 2.0 L of gasoline that weighs 1.32 kg
Answer: 0.66 g/mL
Explanation: The formula for density is d= m/v where m=mass and v=volume.
The mass was given in the problem, m= 1.32kg
The volume was also given in the problem, v= 2.0L
d= m/v ---> d= 1.32kg/2.0L ---> d=0.66kg/L
The problem calls for the answer to be written in g/mL, so we must convert the units. 1 kg contains 1000g and 1 L contains 1000 mL.
1000g/1000mL = 1 so the units change but the 0.66 does not. Therefore, your answer is 0.66g/mL (Two significant figures because 2.0 only has 2 significant figures).
A certain rifle bullet has a mass of 6.93 g. Calculate the de Broglie wavelength of the bullet traveling at 1649 miles per hour.
The de Broglie wavelength of the bullet traveling at 1649 miles per hour is 1.3 x 10^34 m.
What is de Broglie wavelength?
The wavelength that is associated with an object in relation to its quantum and mass is known as de Broglie wavelength.
The particles de Broglie wavelength is inversely proportional to its force.
de Broglie wavelength is expressed as : ^ = h/mv
Where ^ is wavelength, h is plank constant, m is mass and v is velocity.
1 miles = 1.60934 km
So 1649 miles = 2653.8 km
Then 2653.8 x 1000/ 60x60 = 737.2 ms -1.
The momentum of bullet is p = mv = 0.00693kg x 737.2 ms-1
= 5.109 kg/ms
Now, de Broglie wavelength = h/p = 6.63 x 10^-34 / 5.109 kg/ms
= 1.3 x 10^34 m
Thus, de Broglie wavelength of the bullet traveling at 1649 miles per hour is 1.3 x 10^34 m.
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2. How many grams of copper(II) chloride contain 2.17 grams of Cu²+?
4.63 gram of Cooper(II) chloride contain 2.17 grams of Cu²+
Molar mass of copper(II) chloride = 134.45 g/mol
Molar mass of copper = 63 grams
The average mass of an element's atoms expressed in atomic mass units is known as its atomic mass (amu, also known as daltons, D). The mass of each isotope is multiplied by its abundance to produce the atomic mass, which is a weighted average of all the isotopes of that element.
63 gram of copper is present in 134.45 g/mol of copper(II) chloride
1 gram copper is present in copper(II) chloride = 134.45/63 = 2.13 gram
2.17 gram Cu²+ in copper(II) chloride = 2.13 gram x 2.17 gram = 4.63 gram
Hence, 4.63 gram of Copper(ii) chloride contain 2.17 grams of Cu²+
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A Patient with family history of a hematologic condition is being seen by a nurse. What assessment funding needs additional assessment for the condition.
Nursing needs assessments involve gathering subjective and factual information, including the patient's psychosocial history, family history, surgery history, medical history, and medication history.
Introduction Hematologic diseases, sometimes known as blood disorders or disorders of the blood-forming organs, affect millions of Americans. Hematologic diseases, in addition to blood cell tumors, also include rare genetic disorders, HIV-related ailments, sickle cell disease, anemia, and side effects from chemotherapy or blood transfusions.
In hematologic disorders, the genetic condition is passed from parents to their offspring.
Hemoglobin can be aberrant in numerous ways.
a condition like sickle cell anemia, thalassemia.
Certain blood disorders are brought on by a decrease in red blood cell formation.
• Nursing needs assessments involve gathering subjective and factual information, including the patient's psychosocial history, family history, surgery history, medical history, and medication history.
• The patient's family should also be checked for similar disease patients, and accurate disease-related data must be gathered.
• From time to time, thoroughly review all of the patient's reports. Which the patient reported early.
Using clinical judgment, do an analysis or diagnosis to determine the patient's condition and identify the primary causes.
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Ethyl alcohol, also known as ethanol, has a density of 0.79 g/mL. What is the volume, in quarts, of 1.95 kg of this alcohol?
Express your answer using two significant figures.
Taking into account the definition of density, the volume of 1.95 kg of alcohol is 2.6083 quarts.
Definition of densityDensity is a quantity that allows us to measure the amount of mass in a certain volume of a substance.
The expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
density= mass÷ volume
It can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.
Volume in this caseIn this case, you know that:
Density= 0.79 g/mLMass= 1.95 kg= 1950 gReplacing in the definition of density:
0.79 g/mL= 1950 g÷ volume
Solving:
0.79 g/mL ×volume= 1950 g
volume= 1950 g÷ 0.79 g/mL
volume= 2468.35 mL= 2.6083 quarts (being 1 mL= 0.00105669 quarts)
In summary, the volume of 1.95 kg of alcohol is 2.6083 quarts.
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The metallic radius of a sodium atom is 186 pm. What is the volume of a sodium atom in cubic meters? Assume the atom is a perfect sphere. The volume of a sphere is calculated from (4/3)π×r3
The volume of the sodium atom is 2.7 * 10^-29 cubic meters
What is the volume of the sodium atom?Let us recall that the volume is the an atom could be approximated to be the same as the volume of a sphere where the atom has been taken to be a sphere.
We know that volume of a sphere = (4/3)π×r3 where r = radius of the sphere. Having known that we convert the radium into meters and we have 186 * 10^-12 m
Thus;
Volume = 4/3 * 3.142 * ( 186 * 10^-12)^3
Volume = 2.7 * 10^-29 cubic meters
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What orbitals would be present in principal energy level two?
There are 4 orbitals in the principal energy level two. These are: one 2s orbitals and three 2p orbitals (2px, 2py and 2pz).
Principal energy level indicates the energy shell outside the nucleus in which an electron is located. There are 4 principal energy levels. These are: s (sharp), p (principal), d (diffuse) and f (fundamental). The principal energy level can be denoted by the letter n.
Orbital is a function. It describes the behavior and the location of an electron in an atom. The orbitals for any energy level are calculated using the formula n² (where n is the number of orbitals). Hence for energy level 2, the number if orbitals = 2² = 4. Now s has only one orbitals and p has three, therefore a total of four orbitals.
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How many atoms of hydrogen are in 3 moles of ammonia, NH3?
Answer:
[tex]5.4198[/tex] × [tex]10^{24}[/tex] atoms of hydrogen
Explanation:
Firstly, we need to know how many atoms of [tex]NH_{3}[/tex] are there in 3 moles of [tex]NH_{3}[/tex].
We know that there is [tex]6.022[/tex] × [tex]10^{23}[/tex] atoms in a mole of any substance.
[tex]6.022[/tex] × [tex]10^{23}[/tex] is Avogadro's Constant
[tex]6.022[/tex] × [tex]10^{23}[/tex] × 3 = [tex]1.8066[/tex] × [tex]10^{24}[/tex]
Therefore in 3 moles of ammonia, there are [tex]1.8066[/tex] × [tex]10^{24}[/tex] atoms.
Next, you should determine how many molecules of an element is present in ammonia.
There is 1 Nitrogen molecule and 3 Hydrogen molecules for every mole of ammonia.
Finally, since we know 3 moles of ammonia contains [tex]1.8066[/tex] × [tex]10^{24}[/tex] atoms, we just have to multiply accordingly to get the individual amount of atoms of an element a compound has.
For Nitrogen :
1 × [tex]1.8066[/tex] × [tex]10^{24}[/tex] = [tex]1.8066[/tex] × [tex]10^{24}[/tex] atoms of nitrogen
For Hydrogen :
3 × [tex]1.8066[/tex] × [tex]10^{24}[/tex] = [tex]5.4198[/tex] × [tex]10^{24}[/tex] atoms of hydrogen
Therefore, there is [tex]5.4198[/tex] × [tex]10^{24}[/tex] hydrogen atoms in 3 moles of ammonia.
Hope this answer helped!what is the molar mass for CaWO4
Answer:
Calcium tungstate
287.93 g/mol
Chemistry
zinc tetraoxosulphate vi solution was electrolyzed in such a way that is 0.5A flowed for 32min 10 sec, deposited 0.325g of zinc at the Cathode · Calculate 1. The number of moles of zinc deposited (2) The number of Coulombs of electricity required to deposit I mole of zine (3) The charge on a zinc ion (IF = 96500C, zn=65)
the number of moles of zinc is 0.00492, and coulomb's of charge = 965coulumnbs and charge of zinc is +2
Zinc mass divided by zinc molar mass equals the number of moles of zinc deposited. Moles of zinc deposited in number=0.32/65 ,0.00492 moles of zinc were deposited.
the number of coulombs = I X t so 0.5 X 1930 sec so 965 coulombs.
The charge on zinc ion is +2
In the International System of Units, the unit of electric charge is the coulomb. It is equivalent to the electric charge delivered by a 1 ampere continuous current in 1 second and to 51018/0.801088317 in the current edition of the SI. fundamental charges
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the charge of zinc is +2, there are 0.0049 moles of zinc, and the coulomb's of charge are 965 coulombs.
The number of moles of zinc deposited is equal to zinc mass divided by zinc molar mass. Moles of zinc were deposited in number=0.32/65, amounting to 0.0049 moles.I times time equals 0.5 times 1930 seconds, or 965 coulombs.Zinc ion's charge is +2In the International System of Units, the unit of electric charge is the coulomb.It is equivalent to 51018/0.801 in the most recent edition of the SI, which is the electric charge produced by a 1 amp continuous current in a second.When a direct electric current is passed through an electrolyte, it causes chemical reactions at the electrodes and material degradation. Electrolysis is accomplished using an electrolyte, electrodes, and an external power source.
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How can an igneous rock turn into a sedimentary rock?
Answer:
An Igneous rock turns into a Sedimentary rock after going through two processes.
Explanation:
An igneous rock is crushed into little shards of rock called sediment, the sediment is then packed together by other rocks or strong forces, that form together to make a Sedimentary rock.
You can see the image for your explanation.
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Igneous rocks are broken down into sediments which are then compressed by forces of water, wind to form sedimentary rocks.
What are sedimentary rocks?
They are the types of rocks which are formed as a result of accumulation of minerals or organic particles at the surface of the earth.Sedimentation is the name given to a collective process which cause the particles to settle.
The study of sedimentary rocks is useful in civil engineering and as important sources of coal, fossil fuels and ores.The color of sedimentary rock is often determined by iron content and sometimes due to the presence of organic matter.
They are classified based on origin in to 4 types which are clastic, biochemical ,chemical and other sedimentary rocks.While based on composition they are classified as siliciclastic,carbonate ,evaporite,organic rich,siliceous ,iron-rich and phosphatic sedimentary rocks.
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There are 25 elements found in living things. How many of these elements are found in some organisms but not all?
1
6
19
25
Answer: 6
Explanation: There are 25 elements found in living things. How many of these elements are found in some organisms but not all? 1 6 19 25
1. If a chemical reaction occurs and a solid reacts with a gas to form a new solid,
(2 Points)
the mass of the new solid substance increases because a substance in the gas state has mass and contributes
to the new substance's mass.
the mass of the new solid substance does not change because a substance in the gas state does not have
mass and therefore, will not contribute any new mass of the new substance.
it is difficult to determine if the new substance will increase in mass because it depends on the type of gas.
According to the law of conservation of mass, if a chemical reaction occurs and a solid reacts with a gas to form a new solid: (a) the mass of the new solid substance increases because a substance in the gas state has mass and contributes to the new substance's mass.
Law of conservation of mass states that, the mass can neither be created nor be destroyed in a chemical reaction, it can only be transferred rom one form to another or from the reactants to the products of a chemical reaction.
Reactant of a chemical reaction with any state of matter, either solid, liquid or gas has definite mass and that is counted when the final mass of the product is considered.
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The 2017 U.S. gross domestic product (GDP) was valued at 19, 390, 604, 000 dollars. How many Gateway Arch-height stacks of
half dollars are needed to match the GDP in value?
Therefore, we require roughly 589,008.49 Empire State building-height stacks of dimes (856,418,343.3 / 1,454).
A stack of 100 dimes is about 5.3 inches tall. $10 is equal to 100 dimes. Therefore, 1,939,060,400 stacks of 100 dimes are required. This astounding number of dimes is 856,418,343.3 feet tall (1,939,060,400 x 5.3/12).
The Empire States Building is 1,454 feet tall when the antenna is added. Therefore, we require roughly 589,008.49 Empire State building-height stacks of dimes (856,418,343.3 / 1,454). Compared to 2016, when it climbed by 2.8 percent, or $503.8 billion, current-dollar GDP increased by 4.1 percent, or $766.1 billion, to a level of $19,390.6 billion in 2017. In 2021, the current-dollar GDP reached a level of $22.99 trillion, up 10.0% or $2.10 trillion.
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Can you please help me
Answer: true
Explanation:
Define global warming potential
Answer:
Global warming potential (GWP) is the heat absorbed by any greenhouse gas in the atmosphere, as a multiple of the heat that would be absorbed by the same mass of carbon dioxide (CO 2).
What is the limiting reactant if 0.5 g Al is reacted with 0.5 g CuCl2?
What is the theoretical yield of copper produced by this reaction?
Taking into account the reaction stoichiometry ,CuCl₂ is the limiting reagent and the theoretical yield of copper produced is 0.2363 grams.
Reaction stoichiometryIn first place, the balanced reaction is:
2 Al + 3 CuCl₂ → 3 Cu + 2 AlCl₃
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:
Al: 2 molesCuCl₂: 3 molesCu: 3 molesAlCl₃: 2 molesThe molar mass of the compounds is:
Al: 27 g/moleCuCl₂: 134.44 g/moleCu: 63.54 g/moleAlCl₃: 133.35 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
Al: 2 moles ×27 g/mole= 54 gramsCuCl₂: 3 moles ×134.44 g/mole= 403.32 gramsCu: 3 moles ×63.54 g/mole= 190.62 gramsAlCl₃: 2 moles ×133.35 g/mole= 266.7 gramsLimiting reagentThe limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.
Limiting reagent in this caseTo determine the limiting reagent, it is possible to use a simple rule of three as follows: if by stoichiometry 54 grams of Al reacts with 403.32 grams of CuCl₂, 0.5 grams of Al reacts with how much mass of CuCl₂?
mass of CuCl₂= (0.5 grams of Al× 403.32 grams of CuCl₂)÷ 54 grams of Al
mass of CuCl₂= 3.734 grams
But 3.734 grams of CuCl₂ are not available, 0.5 grams are available. Since you have less mass than you need to react with 0.5 grams of Al, CuCl₂ will be the limiting reagent.
Definition of theoretical yieldThe theoretical yield is the amount of product acquired through the complete conversion of all reagents in the final product, that is, it is the maximum amount of product that could be formed from the given amounts of reagents.
Theoretical yield of copperConsidering the limiting reagent, the following rule of three can be applied: if by reaction stoichiometry 403.32 grams of CuCl₂ form 190.62 grams of Cu, 0.5 grams of CuCl₂ form how much mass of Cu?
mass of Cu= (0.5 grams of CuCl₂× 190.62 grams of Cu)÷ 403.32 grams of CuCl₂
mass of Cu= 0.2363 grams
Then, the theoretical yield of copper produced is 0.2363 grams.
SummaryIn summary, you obtain:
CuCl₂ is the limiting reagent.the theoretical yield of copper produced is 0.2363 grams.Learn more about theoretical yield:
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why do we have to multiply the atomic mass of the oxygen to get 32?
The initial water level in a 10-mL graduated cylinder is 4.9 mL . After a sapphire gemstone is added into the cylinder, the water level is 6.2 mL .
What is the volume of the sapphire?
The volume of the sapphire, given the data from the question is 1.3 mL
Data obtained from the questionFrom the question given above the following data were obtained:
Volume of water = 4.9 mLVolume of water + sapphire = 6.2 mLVolume of sapphire =?How to determine the volume of the sapphireThe volume of the sapphire can be obtained by using the displacement method as follow:
Volume of sapphire = (Volume of water + sapphire) - (Volume of water)
Volume of sapphire = 6.2 - 4.9
Volume of sapphire = 1.3 mL
Thus, the volume of sapphire is 1.3 mL
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The _____which are numbers that are found on the lower____hand side of each element symbol. This tells you the number of ____of this element in the molecule
Answer:
twenty charecter answer
How can some fish change their
depth in the water column?
Answer:
skill
Explanation:
Answer: The more air a fish swim bladder contains, the higher the fish will suspend or float in the war.
Explanation:
On what axis is the dependent variable in the graph below?
Growth Rate
100
2828&SARS
90
80
70
60
50
40
30
20
10
0
Full Sun
Plants for Sun and Shade
Partial
Shade
Sun Exposure
Geranium Impatiens Fuchsis Trillium
Partial Sun
Dappled
Sun
Full
Shade
On sunlight exposure depends the growth rate of variable plants
A. Geranium plant is sun loving plant because it showed maximum growth in full sun condition. The growth gradually decreases with the availability of sunlight. In full shade Geranium showed only 10% growth.
B. Impatiens plant showed its maximum growth in partial shade condition. The growth of only 40% occurs in dappled sun condition. In partial sun and full shade conditions it shows only 30% growth. Full sun is harmful for impatiens as it showed only 10% growth.
C. Fuchsia also show maximum growth in partial shade condition. It showed gradual decrease in growth in dappled sun, full shade, partial sun, and full sun respectively.
D. Trillium is shade loving plant because it shows maximum growth in full shade. It shows the lowest growth in full sun which gradually increases in partial sun, partial shade, dappled sun and full shade respectively.
So basically Geranium is full sun plant, Trillium is full shade plant and Impatiens ad Fuchsia are partial shade plants.
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Write the formula for the compounds below:
Sodium iodide
Potassium perchlorate
Calcium nitrite
Copper(||) sulfate
Answer:
check explanation
Explanation:
Sodium Iodide=NaI
Potassium perchlorate=KClO4
Calcium nitrate= Ca(NO3)2
Copper (ii) sulfate=CuSO4
A child is 3 feet 5 inches tall. How tall is the child in meters? Convert feet to inches, add total inches and convert to meters.
What is the meaning of the word string in string coffe and string acid? How do we deal with this difference?
It ought to be "strong." Otherwise, string acid and string coffee would be absurd. So, the proper query would be:
What does the word "strong" mean in the context of strong coffee and strong acid?
Strong coffee indicates that there are more solids and coffee dissolved in the solution. It implies that strong coffee will typically be darker in color. It will also include a lot of caffeine. Strong coffee includes espresso and Death Wish Coffee.
The only acid that totally ionizes in aqueous solution is a strong acid. As soon as it is dissolved in water, it releases one proton H+. Its pH range will be between 0 and 1.
Strong acids include hydrochloric acid and sulphuric acid, for instance.
When strong coffee is dissolved in water, no chemical reaction occurs. When strong acid is dissolved in water, a chemical reaction occurs.
Strong coffee can be consumed, but strong acid cannot because they are both extremely corrosive.
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A light wave has a frequency of 5 x 1014 Hz and a speed of 3 × 10 m/s. Use
the wavelength equation to calculate the wavelength.
A light wave which has a frequency of 5 x 1014 Hz and a speed of 3 × 10 m/s has wavelength is 0.6 × 10^-6.
Wavelength is defined as the separation between two identical points (adjacent crests) in adjacent cycles as the signal travels through space or along a wire.The number of cycles or vibrations that a body in periodic motion experiences during one unit of time, as well as the number of waves that pass a fixed point in a unit of time is called Frequency. Frequency is expressed in Hertz (Hz).Speed of light, the rate at which light waves move through various substances. Specifically, the speed of light in a vacuum is presently calculated to be 3 × 10⁸ m/s.Frequency of light wave = ν = 5 × 10¹⁴ Hz
Speed of light c = 3 × 10⁸ m/s
we have to find out wavelength λ of light wave
We know that,
c = λ × ν
λ = c / ν
= 3 × 10⁸ / 5 × 10¹⁴
0.6 × 10^-6
Therefore, wavelength of light wave is
0.6 × 10^-6
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what is the mass number of iron with 19 neutrons?
Answer:
Explanation:
The mass number of iron is 55.845amu. The mass number is equal to the number of protons added to he number of neutrons in an atom. Each neutron or proton has a mass of about 1amu.Thus we say 55.84500 atomic mass units * 19 =
1 061.055 atomic mass units
Which of the following best describes the reaction seen below?
2H2(g) + O2(g) → 2H2O(l)
a.
Two grams of hydrogen gas combine with 1 gram of oxygen gas to form 2 grams of water.
b.
Two molecules of hydrogen gas combine with 1 molecule of oxygen gas to form 2 molecules of water.
c.
Two liters of hydrogen gas combine with 2 liters of oxygen gas to form 2 liters of water.
d.
Two hydrogen atoms combine with 1 oxygen atom to form 2 water molecules.
Two molecules of hydrogen gas combine with 1 molecule of oxygen gas to form 2 molecules of water.
What is a word equation?A word equation is one in which the equation that is shown in the reaction is written in words rather than by the use of the chemical symbols of the elements that are involved.
We have the reaction; [tex]2H_{2} (g) + O_{2} (g) ---- > 2H_{2} O(l)[/tex], in order for this reaction to be written in the word equation form we have; Two molecules of hydrogen gas combine with 1 molecule of oxygen gas to form 2 molecules of water.
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