1. The limiting reactant is CuCl₂
2. The theoretical yield of copper is 0.24 g
Balanced equation2Al + 3CuCl₂ —> 2AlCl₃ + 3Cu
The following were obtained from the balanced equation:
Molar mass of Al = 27 g/mol Mass of Al from the balanced equation = 2 × 27 = 54 gMolar mass of CuCl₂ = 63.55 + (2 × 35.5) = 134.55 g/mol Mass of CuCl₂ from the balanced equation = 3 × 134.55 = 403.65 gMolar mass of Cu = 63.55 g/mol Mass of Cu from the balanced equation = 3 × 63.55 = 190.65 gFrom the balanced equation above,
54 g of Al reacted with 403.65 g of CuCl₂ to produce 190.65 g of Cu
1. How to determine the limiting reactantFrom the balanced equation above,
54 g of Al reacted with 403.65 g of CuCl₂
Therefore,
0.5 g of Al will react with = (0.5 × 403.65) / 54 = 3.74 g of CuCl₂
From the above calculation, we can see that a higher amount (i.e 3.74 g) of CuCl₂ than what was given (i.e 0.5 g) is needed to react completely with 0.5 g of Al.
Thus, CuCl₂ is the limiting reactant.
2. How to determine the theoretical yield of copperFrom the balanced equation above,
403.65 g of CuCl₂ reacted to produce 190.65 g of Cu
Therefore,
0.5 g of CuCl₂ will react to produce = (0.5 × 190.65) / 403.65 = 0.24 g of Cu
Thus, the theoretical yield of Cu is 0.24 g
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A German automobile's gas mileage is 18km/L. Convert this quantity to miles per gallon.
Answer:
42
Explanation:
miles per gallon = kilometers per liter × 2.35
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
Forest food web………….
Forest Food web consists of the producers, main consumers, secondary consumers, scavengers, and decomposers. Food web is the collection of the large number of food chains.
What are some examples of food webs?Numerous food chains make up a food web. As animals seek food, a food chain only follows one way. As an example, a hawk consumes a snake following the consumption of a frog, a grasshopper, and grass. A food web illustrates the numerous relationships between plants and animals.
What are the different types of food web?1. Primary consumers
2. Secondary consumers
3. Tertiary consumers
4. Decomposers or phytoremediators
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Please can somebody help me
Do you think children are safe when they are taken to ECD centre during this pandemic crisis
Answer:
Yes
Explanation:
these gains towards early childhood development are now seriously threatened
HELP PLEASE!!! HELP!!! manuel tested the effects of temperature on solubility of sugar in water. he measured the maximum amount of sucrose (in grans) he could dissolve in 100 g of water. manuel repeated the test at five different temperatures. the graph of his results are below
based on his observations which of the following is a general hypothesis manuel might form?
a) the solubility of a solid increases as the temperature increases
b the solubility of a solid decreases as temperature increases
c) the decreasing solubility of solid raises the temperature of water
Answer:
A
Explanation:
A rise in temperature means that there is more thermal energy which will be used in the reaction by the sugar/sucrose, that is why solubility increases with temperature increase
Answer: The solubility of a solid increases as the temperature increases.
Explanation: THE ANSWER!! okay everbody
What is the chemical equation for frying an egg
The given chemical reaction is :
Calcium Oxide (s) + Water (l) → Calcium Hydroxide (s)
Molecular Changes : A chemical reaction is one in which the replying substances experience changes at the molecular position. This means that bonds between tittles of the reactants are broken, and tittles are changed or rearranged to produce commodity new. Chemical reaction can be reversible or unrecoverable.
What happens when frying an egg ?
Frying an egg is a chemical response. It's an illustration of an endothermic response or bone that takes in heat to make the response do. An egg is made up of proteins and water, and the thralldom also contains fat. When an egg is hotted , the proteins begin to change their structure. Protein motes are veritably complex, made up of long chains of structure blocks called amino acids. These chains are also folded and twisted to make complicated molecular structures. Hotting the egg adds energy, which causes the motes to begin to move and lose their shape. Bonds holding the shape of the protein motes together begin to break, unfolding the proteins and allowing them to spread out. New bonds are formed, and water evaporates out of the egg, changing it into a semi-solid. The egg has experienced anon-reversible chemical response, as it can not be changed back into its raw state.
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Carbon monoxide (CO) is a poisonous gas because it binds very strongly to the oxygen carrier hemoglobin in blood. A concentration of 8.00 × 102 ppm by volume of carbon monoxide is considered lethal to humans. Calculate the volume in liters occupied by carbon monoxide in a room that measures 20.35 m long, 13.17 m wide, and 17.25 m high at this concentration.
Volume of CO in the room:
Answer:
Explanation:
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Calculate the density, in g/mL, of a liquid that has a mass of 0.115 g and a volume of 0.000275 L.
Density of the liquid is 0.418g/mL
The liquid sample has a volume of 0.000275 L. We can convert this to mL (because we are asked to find the density in g/mL):
mass of liquid= 0.115 grams
volume of the liquid, V= 0.000275L
Density is defined as the ratio of mass per unit volume
Now we must convert the unit of volume from L to ml as liter is SI unit which goes with Kilogram
volume in ml = 0.000275 ml/l x 1000 =0.275 ml
Density d = mass/volume
= 0.115/ 0.275
= 0.418 g/mL
Hence the density of the liquid is 0.418 g/mL
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Name the material sent into space by a supernova
Answer:
Nebula Was Sent Into Space By Supernova
This shock wave compresses the material it passes through and is the only place where many elements such as zinc, silver, tin, gold, mercury, lead and uranium are produced. Over several months the gases cool and fade in brightness and join the debris of interstellar space.
Answer: This shock wave compresses the material it passes through and is the only place where many elements such as zinc, silver, tin, gold, mercury, lead and uranium are produced. Over several months the gases cool and fade in brightness and join the debris of interstellar space.
Explanation:
An infant acetaminophen suspension contains 80.0mg/0.80 mL suspension. The recommended dose is 15 mg/kg body weight. (1.000 lb. is equivalent to 453.59 g; this is a measured equality.)
How many mL of this suspension should be given to an infant weighing 17 lb ? (Assume two significant figures.)
Express your answer using two significant figures.
The amount, in mL, of the suspension that should be given to an infant weighing 17 lb will be 1.16 mL
Dimensional analysis0.8 mL of the liquid contains 80.0 mg of the drug.
The recommended dose is 15 mg per kg of body weight
The infant to be given the drug weighs 17 lb.
First, let's convert the weight of the infant to kg.
1 lb = 453.59 g
17 lb = 453.59 x 17/1
= 7711.03 g
1000 g = 1 kg
7711.03 g = 7711.03 x 1/1000
= 7.711 kg
So, the baby's weight is 7.711 kg.
The drug dose for the baby can thus be calculated as:
15 mg x 7.711 = 115.67 mg
But 0.8 mL of the drug contains only 80.0 mg. How many mL will contain 115.67 mg?
0.8 x 115.67/ 80.0 = 1.16 mL
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Can somebody please help me
Answer:
A.
Explanation:
Spiders are creepy.
That your answer.
Sample of krypton gas occupies 75.0 mL at 0.400 atm. If the temp remained constant, what volume would the krypton occupy at A. 4.00 atm; B. 0.0400 atm; C. 765 torr; D. 4.00 torr; E. 3.50x10^-2 torr?
The correct answer for volume would the krypton occupy are 29.8 mL , 5375 mL , 6.5 * 10^ 5 mL .
We can solve this problem by using Boyle's Law, which states that:
"For a fixed mass of an ideal gas kept at constant temperature, the pressure
of the gas is inversely proportional to its volume"
Mathematically:
pV = const. where
p is the pressure of the gas
V is its volume
We can rewrite the formula as
PiVi = P2V2
For the gas in this problem:
P=0.400atm is the initial pressure
Vi 75.0mL is the initial volume
765mm Hg 1.006am is the final pressure (using the conversion factor
1atm = 760atm )
Solving for V2, we find the final volume:
V 2 =p1vi/ p2 =(0.400) (75.0)/ 1.006 = 29.8mL
We can solve this part by using again the equation:
Where in this case we have:
p 1= 0.400at is the initial pressure
V_{1} = 75mL is the initial volume
p_{2} = 4, nm*H_{0} is the final pressure
Converting into atmospheres,
p_{2} = 4 Hg 7mm/d -0.00536m
And solving for V2, we find the final volume:
V_{2} = (p_{1}*V_{1})/p_{2} = ((0.4)(75))/0.0056 = 5357mL
e)
As before, we use Boyles' Law:
p{1}*V{1} = p{2}*V{2}
In this part we have:
p{1} = 0.4atm is the initial pressure of the gas
V{1} = 75mL is the initial volume of the gas
p{2} = 3.5 * 10 ^ - 2 torr
1 torr is equivalent to 1 mmHg, so the conversion factor is the same as before.
therefore the final pressure in atmospheres is:
p2=3.50 *10^-2 2mm Hg 760mmHg/atm 4.6-10-atm
And so, the final volume of the krypton gas is:
V{2} = (p{1}V{1})/p{2} = ((0.4)(75))/(4.6 * 10 ^ - 5) = 6.5 * 10 ^ 5 * mL.
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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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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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what is the molar mass for CaWO4
Answer:
Calcium tungstate
287.93 g/mol
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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9. The surface of the Moon is covered in craters, mountains, and———
plains from ancient volcanoes,
in Space
Moon geological research is based on observations made using telescopes on Earth, measurements made by spacecraft in orbit, lunar samples, and geophysical data.
Oxygen (O), silicon (Si), iron (Fe), magnesium (Mg), calcium (Ca), aluminum (Al), manganese (Mn), and titanium are among the substances known to exist on the lunar surface (Ti). The most plentiful ones include silicon, iron, and oxygen. The estimated oxygen concentration is 45%. (by weight). Due to solar wind deposition, carbon (C) and nitrogen (N) seem to be present only in very small amounts.
Impact craters, associated ejecta, a few volcanoes, hills, lava flows, and depressions filled with magma are the main features of the lunar surface.
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Which statement correctly compares a hypothesis and a theory? A theory is a prediction for a specific situation, while a hypothesis is used to make predictions for many similar situations. A hypothesis is a prediction for a specific situation, while a theory is used to make predictions for many similar situations. A theory provides an explanation, but a hypothesis does not. A hypothesis provides an explanation, but a theory does not.
The statement that correctly compares a hypothesis and a theory is that a hypothesis is a prediction for a specific situation, while a theory is used to make predictions for many similar situations (option B).
What is a hypothesis?A hypothesis is a tentative conjecture explaining an observation, phenomenon or scientific problem that can be tested by further observation, investigation and/or experimentation.
On the other hand, a scientific theory is a coherent statement or set of ideas that explains observed facts or phenomena and correctly predicts new facts or phenomena not previously observed, or which sets out the laws and principles of something known or observed.
A theory is simply a hypothesis confirmed by observation or experiment.
Therefore, the statement that correctly compares a hypothesis and a theory is that a hypothesis is a prediction for a specific situation, while a theory is used to make predictions for many similar situations.
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Matter and energy lab report
PLEASE HELP ME I don’t know what I’m doing this is so confusing to me
Give the electron configuration using the crystal field theory of the following complexes and show your configuration in the the crystal field diagram (N.B calculate the oxidation number of metals 1st).
1. [Co(NH3)5Cl]Br2
2. Na3[Fe(CN)6]
The oxidation number of the cobalt is +2 while the oxidation number of iron is +3.
What is the crystal field theory?According to the crystal filed theory, the ligands serve as point charges and when they are introduced to the symmetrical octahedral crystal field, the field splits and the there is a barry center with electrons that are above and below the barry center depending on their energy.
Hence, we can see that cobalt II ion is a d7 specie with electron configuration; [tex]1s^2 2s^2 2p^6 3s^2 3p^6 3d^7[/tex]. The iron III ion is a d5 specie having electron configuration[tex]1s^2 2s^2 2p^6 3s^2 3p^6 3d^5[/tex]. The oxidation number of the cobalt is +2 while the oxidation number of iron is +3.
The crystal field diagram of each of the ions is shown in the image attached.
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3. An observation that includes numbers rather than simple word
descriptions is a?
a. hypothesis
c. variable
b. measurement
d. control
What is one use of the periodic table? to convert molecules into elements , to convert molecules into elements , , to find out which symbol is used for each element , to find out which symbol is used for each element , , to hold experimental equipment during testing , to hold experimental equipment during testing , , to help perform complex mathematical calculations
Answer:
Molar mass is used to convert mass to moles, or moles to mass. Avogadro's number is used to calculate the number of particles in a given number of moles, or to calculate the number of moles in a given number of particles.
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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6) Calculate the mass of a liquid with a density of 2.5 g/mL and a volume of 15 mL.
The mass of a liquid with a density of 2.5 g/mL and a volume of 15 mL is 37.5g.
What is Density ?
Density is the measurement of quantity or mass per unit of volume in a particular substance. Its units are grams per centimeters cube (g/cm³) or kilograms per liter (kg/l)
⇒ g/cm³ can also be written as g/mL because 1cm³ = 1mL
What is Volume ?
Volume is a measure of space. When measuring the volume of a liquid which is sometimes referred to as capacity, the units liters (L) and milliliters (mL) are used.
What is Mass ?Mass is defined as amount of matter present in a body. Gram (g) and kilogram (kg) are the common units.
density = mass / volume
mass = density × volume
= 2.5 g/mL × 15 mL.
= 37.5 g
Since density is given in g/mL and volume is given in mL, we can keep the unit of mass in grams (g).
Thus we can conclude that the mass of liquid is 37.5g
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10
Determine the formal charges on all atoms in the molecules.
a. :N=N=N:
b. : CEO:
C.
:0:
O.N.O
Formal charge = number of valence electron - 1/2 bonded electron - lone pair electron
a. N3 = number of valence electron - 1/2 bonded electron - lone pair e-
= 5 - 2/4 - 4
= -1
b. CO = number of valence electron - 1/2 bonded electron - lone pair e-
Charge on carbon
= 4 - 2 - 6/2
= -1
charge on oxygen
number of valence electron - 1/2 bonded electron - lone pair e-
= 6 - 2 - 6/2
= +1
c. NO3
by making structure we found that each oxygen has different charge in this compound.
O = -1, -1 , 0
N = 0
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1.3511, 2.473, 5.687524, 7.555, 8.235 rounded to one significant figure. Please help, I'm stuck!
Answer:
1,2,6,8,8
Explanation:
1.3511=1
2.473 =3
5.687524=6
7.555=8
8.235=8
A 0.100 g sample of a carboxylic acid is burned in oxygen, producing 0.178 g of CO2 and 0.0734 g of H2O. Determine the empirical formula of the carboxylic acid.
The empirical formula of the carboxylic acid is C₃H₆O₂.
For determination of the empirical formula of the carboxylic acid.
As you know, one mole of water, contains 2 moles of hydrogen. This means that the percent composition of hydrogen in water will be
2× 1.00794 g/mol / 18.015 g/mol × 100 = 11.19% H
What this means is that every 100 g of water will contain 11.19 g of hydrogen. In your case, the 0.2349-g sample of water will contain
0.2349 g water⋅ 11.19 g H / 100 g water = 0.026285 g H
Similarly, one mole of carbon dioxide, CO₂, contains one mole of carbon. The percent composition of carbon in carbon dioxide will be
1 ×12.011 g/mol / 44.01 g/mol × 100 = 27.29% C
Once again, this tells you that every 100 g of carbon dioxide will contain
27.29 g of carbon. In your case, you will have
0.5706g H₂O ⋅ 27.29 g C /100g H₂O = 0.15572 g C
The mass of carbon + hydrogen originally present in the carboxylic acid sample will be
m C + H = 0.026285 g + 0.15572 g =0.18201 g
The initial mass of the sample was equal to 0.3200 g. This tells you that the sample also contains oxygen
m oxygen = 0.3200 g −0.18201 g = 0.13799 g O
So, now that you know how many grams of each element were present in the initial sample, use their molar masses to convert these to moles
For C: 0.15572g /12.011g/mol = 0.012965 moles C
For H: 0.026285 g/1.00794g/mol = 0.026078 moles H
For O: 0.13799g/15.9994g/ mol = 0.0086247 moles O
Now, to get the compound's empirical formula, you need to find the smallest whole number ratio that exists between the number of moles of each element in the compound.
To do that, divide these values by the smallest one to get
For C: 0.012965 moles / 0.0086247 moles = 1.5032 ≈ 1.5
For H: 0.026078moles /0.0086247 moles =3.0236≈ 3
For O: 0.0086247moles /0.0086247 moles = 1
This means that you have
C₁.₅H₃O₁
Since you're looking for the smallest whole number ratio that exists between the elements, multiply each subscript by 2 to get
C₁.₅H₃O₁ * 2 = C₃H₆O₂
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This is an impossible formula. Pretend it is real.
If you had 1 mol of Cr8(PO4)3 how many moles of Cr would there be?
Remember that you should never include a 1 as a subscript but for the sake of clarity for this problem you may see a 1 as a subscript.
Fe = 52.00 g/mol
P = 30.97 g/mol
O = 16.00 g/mol
Make sure your answer includes TWO decimal places.
The number of mole of Cr in 1 mole of Cr₈(PO₄)₃ is 8.00 moles
Description of Cr₈(PO₄)₃From the formula of the compound, Cr₈(PO₄)₃, the following were obtained:
8 moles of Cr3 moles of P12 moles of OHow to determine the number of mole of Cr in 1 mole of Cr₈(PO₄)₃From the formula, we can see that 8 moles of Cr are present.
Thus, 1 mole of Cr₈(PO₄)₃ will contain = 1 × 8 = 8.00 moles of Cr
Therefore, we can conclude that 1 mole of Cr₈(PO₄)₃ contains 8.00 moles of Cr
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Can you please help me
Answer: false
Explanation: A model is a representation of a more complex system