A 0. 515 g sample of CaCl2 reacts with aqueous sodium phosphate to give 0. 484 g Ca3(PO4)2. Show the calculation for the theoretical yield of Ca3(PO4)2.
What is the percent yield of Ca3(PO4)2.
Answers
The percent yield of Ca₃(PO₄)2 is 100.6%. This means that the actual yield is slightly higher than the theoretical yield, which could be due to experimental error or incomplete reaction.
To calculate the theoretical yield of Ca₃(PO₄)2, we need to determine the limiting reagent in the reaction. We can do this by calculating the amount of Ca₃(PO₄)2 that can be produced from each reactant, using stoichiometry and the molar masses of the compounds.
The balanced chemical equation for the reaction is:
3 CaCl₂ + 2 Na₃PO₄ → Ca₃(PO₄)2 + 6 NaCl
The molar mass of CaCl₂ is 110.98 g/mol, and the molar mass of Ca₃(PO₄)2 is 310.18 g/mol.
First, we convert the mass of CaCl₂ to moles:
0.515 g CaCl₂ / 110.98 g/mol = 0.00464 mol CaCl₂
Next, we use stoichiometry to calculate the moles of Ca₃(PO₄)2 that can be produced from the CaCl₂:
0.00464 mol CaCl₂ × (1 mol Ca₃(PO₄)2 / 3 mol CaCl₂) = 0.00155 mol Ca₃(PO₄)2
Finally, we convert the moles of Ca₃(PO₄)2 to grams:
0.00155 mol Ca₃(PO₄)2 × 310.18 g/mol = 0.481 g Ca₃(PO₄)2 (theoretical yield)
Therefore, the theoretical yield of Ca₃(PO₄)2 is 0.481 g.
To calculate the percent yield, we use the formula:
percent yield = (actual yield / theoretical yield) × 100%
The actual yield is given as 0.484 g. Plugging in the values, we get:
percent yield = (0.484 g / 0.481 g) × 100% = 100.6%
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Related Questions
how do you calculate the number of protons
Answers
Answer:
no. of protons = atomic number of the elements
At 101.3kPa and 298 K. What is the total amount of heat released Open one mole of aluminum oxide is formed from its elements
Answers
Answer:
The answer is (3) 1676 kJ. The heats of reaction at 101.3 kPa and 298 K for reaction: 4Al(s) +3O2(g)= 2Al2O3(s) is -3351 kJ. So for one mole of aluminum oxide is 3351/2=1676 kJ.
Energy in a vacuum travels by ___.
A. radiation
B. conduction
C. convection
Answers
Balloon has a volume of 600-ml at temperature of 360 K. If the temperature of
the balloon drops to 250 K, find the volume
Answers
Answer:
V₂ ≈416.7 mL
Explanation:
This question asks us to find the volume, given another volume and 2 temperatures in Kelvin. Based on this information, we must be using Charles's Law and the formula. Remember, his law states the volume of a gas is proportional to the temperature.
V₁ / T₁ = V₂ / T₂where V₁ and V₂ are the first and second volumes, and T₁ and T₂ are the first and second temperature.
The balloon has a volume of 600 milliliters and a temperature of 360 K, but the temperature then drops to 250 K. So,
V₁= 600 mL T₁= 360 K T₂= 250 KSubstitute the values into the formula.
600 mL /360 K = V₂ / 250 KSince we are solving for the second volume when the temperature is 250 K, we have to isolate the variable V₂. It is being divided by 250 K. The inverse o division is multiplication, so we multiply both sides by 250 K.
250 K * 600 mL /360 K = V₂ / 250 K * 250 K 250 K * 600 mL/360 K = V₂The units of Kelvin cancel, so we are left with the units of mL.
250 * 600 mL/360=V₂416.666666667 mL= V₂Let's round to the nearest tenth. The 6 in the hundredth place tells us to round to 6 to a 7.
416.7 mL ≈V₂The volume of the balloon at 250 K is approximately 416.7 milliliters.
Which method is representative of a fission reaction?
A Splitting large nuclei
B Splitting large electrons
C combining large electrons
D Combining large nuclei
Answers
The splitting of large nuclei method is representative of a fission reaction. Thus, option A is the answer.
Fission reaction refers to a type of nuclear reaction in which the nucleus of an atom is split into two or smaller nuclei, along with the release of a large amount of energy. This process can occur naturally but is also commonly induced in nuclear reactors and weapons.
In a fission reaction, the nucleus of an atom, typically a heavy element such as uranium or plutonium, is bombarded with neutrons. This causes the nucleus to become unstable and split into two or smaller nuclei, as well as several neutrons. These neutrons can then go on to initiate additional fission reactions, leading to a chain reaction and the release of a significant amount of energy in the form of heat and radiation.
Fission reactions are the basis for the operation of nuclear reactors, where the heat generated by the chain reaction is used to produce electricity. However, they are also the source of the energy released by nuclear weapons. Fission reactions can be highly destructive, producing massive explosions and long-term environmental damage from the radiation released.
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What are some indicators of rusting? Check all that apply. production of light color change formation of a solid formation of a gas
Answers
Answer:
Some indicators of rusting include:
a. color change
b. formation of as solid
Explanation:
Rusting is a redox ( a reaction in which reduction and oxidation occur concurrently) reaction which occcur when metallic iron is exposed to air and water or water vapor reacts with the oxygen and water to form a hydrated mixture of oxides of the metal.
The shiny metallic iron becomes oxidized to Fe²⁺ and Fe³⁺ ions while neutral oxygen gas molecules are reduced to O²⁻ ions. The shiny metallic iron also loses its lustrous appearance as the process proceeds and is covered by a layer of rust.
The equation for reaction is given below:
4Fe(s) + 30₂(g) + xH₂O(l) -----> 2Fe₂O₃. xH₂O(s)
The product of the reaction above is known as rust and is reddish-brown solid.
Rusting causes iron to become flaky and weak as rust is very light and porous, reducing the strength and appearance of iron which are desirable properties of iron when used in construction. The rusting of iron can lead to damage to automobiles, railings, bridges, and several other iron structures.
Answer:
color change and formation of a solid.
Explanation:
the answer that comes after is chemical also hope this helps!
Magnesium oxide does not readily decompose into magnesium and oxygen. the reaction is shown below. mgo(s) 601.7 kj right arrow. mg(s) ½o2(g) which factor plays the most important role in allowing this reaction to occur? temperature concentration pressure surface area
Answers
Temperature factor plays the most important role in the decomposition reaction of magnesium oxide.
What is spontaneous reaction?
Those reactions which are exothermic in nature or release heat during the reaction are spontaneous reactions.
Given decomposition reaction of magnesium oxide is:
MgO(s) + 601.7 kJ → Mg(s) + ½ O₂(g)
From the above reaction, it is clear that during the decomposition of magnesium oxide heat is absorbed. So, for the feasible decomposition of compound accurate temperature is wanted.
Hence, correct option is temperature.
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Answer:
temperature
A.
Explanation:
edgen
Your next-door neighbor has a little girl who is 3 ft, 5 inches tall. What is the little girl’s height measured in inches? in decimeters?
Answers
Answer:
41 inches
Explanation:
There is 12 inches in 1 foot so times 12 and 3. Thats 36 so now do 36 + 5 that =41.
What element is found in Group 16 and Period 3?
Answers
Answer:
sulfur is found in group 16 period 3
What are 6 things you would do to a new substance to determine if it was a metal? I need help!
Answers
Answer:
magnet is one
Explanation:
metals attach to magnets
Answer:
Explanation:
Check if they are ductile and malleable
If they are conductive
Metals produce hydrogen gas on reacting with acid
If they are sonorous
Or if you don’t have physical identity of them you can rather check it out in the periodic table.
how to get cork out of wine bottle without corkscrew
Answers
Cork can get out of wine bottle without corkscrew by pushing the cork down into the bottle , use a plastic bag , grip the bag and twist , slowly remove the cork.
To get a cork out of a wine bottle without a corkscrew, you can try the following method:
1. Push the cork down into the bottle: Use a long, thin object like a pen or a chopstick to push the cork into the wine bottle. Apply gentle and steady pressure until the cork is completely inside the bottle.
2. Use a plastic bag: Take a plastic bag and place it over the top of the bottle, covering the cork. Make sure the bag is big enough to cover the entire cork and create a seal around the bottle neck.
3. Grip the bag and twist: Hold the bag tightly around the bottle neck and grip it firmly. Then, start twisting the bottle in a clockwise direction while holding the bag. The friction between the bag and the cork should help to pull it out.
4. Slowly remove the cork: As you twist the bottle, gradually pull the bag upwards. The cork should start to come out of the bottle. Be cautious and continue twisting and pulling until the cork is completely removed.
Remember to be careful while attempting this method to avoid any injuries or spillage. It's always recommended to use a corkscrew for opening wine bottles to ensure a safe and efficient process.
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All of the following are qualitative tests that are often used to identify unknown ionic compounds except __________
Answers
All of the following are qualitative tests that are often used to identify unknown ionic compounds except titration.
Qualitative tests are conducted to determine the presence or absence of certain ions or compounds in a sample based on their characteristic reactions. Common qualitative tests include flame tests, precipitation reactions, color changes, and gas evolution tests.
Titration, on the other hand, is a quantitative technique used to determine the concentration of a specific substance in a solution by reacting it with a standardized solution of another substance. It is not typically used as a qualitative test for identifying unknown ionic compounds.
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what mass of small stones would be needed to make the strongest concrete? give a reason for your awnser.
Answers
Answer:
For a good consert mix aggregate needed to the clean hard strong partical free of absorb chemicals or coating clay and other fine materials
Lisa's Chemistry class was performing an experiment with gas pressures. They filled a container with gas at a pressure of 101,000 Pa at room temperature. When they doubled the temperature, the pressure also doubled. What was the new pressure in scientific notation?
Answers
Answer:
2.02 × 10^5 Pa
Explanation:
According to this question, in an experiment, a container was filled with gas at pressure of 101,000 Pa, at room temperature. When this temperature was doubled, the pressure also increased by two times i.e.
The pressure changed to (101,000 Pa × 2) = 202,000 Pa
This question is asking to represent this in scientific notation. Scientific notation aims at representing a small or too large number in an easy way. It is done by making use of power of ten i.e. a × 10^b
Where; a = decimal number
b = power of ten
In the case of a large number like 202,000, the power of ten is derived by counting the decimal place backwards. If we are to count until we stop in front of the last digit, we will have 5 times.
That is; 2.02000 × 10^5
We can remove every trailing zeros
Hence, the answer is 2.02 × 10^5 Pa.
What information is obtained from radioactive dating?
- How old something was when it died
- The damage done to an object from radiation
- The age of an object that was once living (ANSWER)
- The lifetime of an isotope in a particular object
Answers
Answer:
C
Explanation:
The age of an object that was once living. Hence, option C is correct.
What is radioactive dating?Radioactive dating can be defined as a strategy to date the age of fossils by means of radioactive isotopes.
These methodologies (Radioactive dating) are fundamental for the application field of geologists and palaeontologists.
In conclusion, Radioactive dating refers to the techniques used to date the age of rocks and fossils by radioactive isotopes.
Information related to the age of an object that was once living is obtained from radioactive dating.
Hence, option C is correct.
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Using the following electronegativity values:
C 2.5 CI 3.0 H 2.1 O 3.5 select from the following group the molecule that fits the given statement:
a) CH3CHO b) CO2 c) CH3CI
d) C2H6
e) none
Answers
\(CH_{3}CHO\) molecule shows the smallest number of lone pairs in its lewis structure.
The structure is attached below.
A is the correct answer.
A Lewis Structure is a greatly condensed illustration of a molecule's valence shell electrons. It is used to display how the electrons are positioned around particular molecules' atoms. When two atoms are bonded together, electrons are depicted as 'dots' or as a line.
Lewis structures, often referred to as Lewis dot formulas, electron dot structures, or Lewis electron dot structures, are diagrams that depict the interactions between the atoms in a molecule as well as any lone pairs of electrons that may be present.
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The complete question is:
select from the following group the molecule that fits the given statement: This molecule shows the smallest number of lone pairs in its lewis structure.
a) CH3CHO
b) CO2
c) CH3CI
d) C2H6
e) none
A 0. 15 M solution of an unknown acid with the formula H2X is tested. What concentration of [H + ] in the water would indicate a strong acid?
Answers
A concentration of 0.30 M [\(H^{+}\)] in the water would indicate a strong acid for the given solution of \(H_{2} X\).
A strong acid is one that completely dissociates in water, meaning it donates all of its hydrogen ions (\(H^{+}\)) to the solution.
For the given acid, \(H_{2} X\), the dissociation equation would be:
\(H_{2} X\) → 2\(H^{+}\) + \(X^{2-}\)
Since it's a strong acid, we assume that all molecules will dissociate, resulting in two moles of \(H^{+}\) for every mole of \(H_{2} X\). Therefore, to calculate the concentration of [\(H^{+}\)] in the solution:
[\(H^{+}\)] = 2 × (concentration of \(H_{2} X\))
Given the concentration of \(H_{2} X\) is 0.15 M:
[\(H^{+}\)] = 2 × 0.15 M
[\(H^{+}\)] = 0.30 M
So, a concentration of 0.30 M [\(H^{+}\)] in the water would indicate a strong acid for the given solution of \(H_{2} X\).
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Balance the following chemical equation by using System of equations Nag Pou + Ba(NO₂), ) Bag(Poes)₂ + NaNo₂
Answers
To balance the chemical equation: NaPO3 + Ba(NO2)2 → Ba(PO3)2 + NaNO2. substituting a = c into the third equation: a = c From the fourth equation, we have: 3a = 2c + 2a 3a = 2a + 2a a = 0.
We can set up a system of equations based on the number of atoms of each element on both sides of the equation. Let's denote the coefficients of the balanced equation as follows:
NaPO3: a
Ba(NO2)2: b
Ba(PO3)2: c
NaNO2: d
Now, we can write the system of equations:
Na: a = d
Ba: b = c
P: a = c
O: 3a = 2c + 2d
N: 2b = d
Solving this system of equations will give us the balanced coefficients. From the first equation, we can substitute d = a into the fifth equation:2b = a Substituting this back into the second equation: b = c Now, substituting a = c into the third equation: a = c From the fourth equation, we have: 3a = 2c + 2a 3a = 2a + 2a a = 0
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Describe how the nervous system helps the boy detect the aroma coming from the pot on the stove.
Answers
Answer:
When a boy smells the aroma coming from the pot on the stove is actually detecting the chemicals coming from the air which comes from hot food that dissolves in the mucus present in the nasal cavity that carries tiny hairs made up of the nerve fibers that absorb these chemicals and excite or stimulate the olfactory receptors.
Various types of a distinct aroma or smell lead to a specific combination of the olfactory cells to make a specific smell. These combination patterns transported to the olfactory bulb along axons; a long extended neuron.
The sensory patterns or information encoding the smell of food present in the pot reaches the primary olfactory cortex in the brain, which is present on the anterior surface of the temporal lobe, and decodes accordingly.
Answer:You breath in what you smell and if it smells good or not you usely get up an see what is in the kitchen
Explanation:
The Solubility Product Constant for silver sulfite is . The molar solubility of silver sulfite in a water solution is
Answers
The given information is incomplete as the Solubility Product Constant (Ksp) for silver sulfite is missing. Without knowing the specific value of Ksp, it is not possible to determine the molar solubility of silver sulfite in a water solution.
The molar solubility of a compound is related to its solubility product constant (Ksp), which is an equilibrium constant for the dissolution of the compound in a solvent. The Ksp expression is typically written as the product of the concentrations (or activities) of the constituent ions raised to their stoichiometric coefficients.
By knowing the Ksp value for silver sulfite, one can calculate its molar solubility in a water solution. However, since the Ksp value is not provided in the question, it is not possible to determine the molar solubility of silver sulfite without additional information.
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what is the name of the sugar produced
Answers
We apply the same amount of energy to 10.0-g samples of aluminum, iron, and silver which begin at the same temperature. Rank the metals from highest to lowest temperature after the heat is applied
Answers
Answer:
Ag > Fe > Al
Explanation:
The values of the specific heat capacity of the elements are given as;
Aluminum = 0.897 J/g*K
Iron=0.449 J/g*K
Silver=0.235 J/g*K
Specific heat capacity basically refers to how much heat is required to change the temperature of a unit mass of a substance by a degree. Elements with high specific heat capacity would require higher energy compared to elements with lower values,
Aluminium (Al) has the highest specific heat capacity, hence it wold require more energy to cause a change in temperature. Aluminium would be the lowest.
Silver (Ag) has the lowest specific heat capacity hence it would require less energy to cause a change in temperature. Silver wold be the highest.
The middle would be iron (Fe).
The rank is given as;
Ag > Fe > Al
What does the release or absorption of energy indicate
Answers
Hope this helps!
Answer:
Chemical Change
Explanation:
a. What is the mass of 3.47x10^26 molecules of CuCl2?
Answers
Answer:
77460 g
Explanation:
To solve this problem first we convert molecules into moles, using Avogadro's number:
3.47x10²⁶ molecules ÷ 6.023x10²³ molecules/mol = 576.12 moles
Then we convert 576.12 CuCl₂ moles into grams, using its molar mass:
576.12 mol * 134.45 g/mol = 77460 g
So the answer is 77460 g, or 77.46 kg.
What does it mean for something to be amphiphilic?
Answers
Answer:
Amphiphilic, or amphipathic, is a molecule that is both hydrophilic and hydrophobic
Explanation:
A value of 25 °C is a measurement of
O distance.
O density.
O mass.
O volume.
O temperature
Answers
Consider the intermediate equations: 3 equations.
C(s) + O2(g) --> CO2(g) Delta H1 = -393.5 kJ
2CO(g) + O2(g) --> 2CO2(g) Delta H2 = -566.0 kJ
2H2O(g) --> 2H2(g) + O2(g) Delta H3 = 483.6 kJ
With the overall reaction:
C(s) + H2O(g) --> CO(g) + H2(g) Delta Hrxn = ?
QUESTION 1:
What must be done to calculate the enthalpy of reaction?
The first must be halved.
The first must be reversed.
The second must be halved.
The second must be reversed.
The third must be halved.
The third must be reversed.
QUESTION 2:
What is the overall enthalpy of reaction?
Delta Hrxn = ____ kJ
Answers
Answer:
C. The second equation must be halved
D. The second equation must be reversed
E. The third equation must be halved.
Delta Hrxn= 131.3 kJ
Explanation:
The correct answer is -582 KJ.
What is the enthalpy of reaction?
Enthalpy is the heat content of a system.The enthalpy change of a reaction is roughly equivalent to the amount of energy lost or gained during the reaction.A reaction is favored if the enthalpy of the system decreases over the reaction.What is the overall enthalpy of the reaction?
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based on the calculations performed in this experiment, would the same mass of a solute with a significantly higher molar mass have a larger or smaller effect on the boiling point elevation?
Answers
Based on the calculations performed in this experiment, the same mass of a solute with a significantly higher molar mass would have a larger effect on the boiling point elevation. As a result, the same mass of a solute with a higher molar mass will have a greater effect on the boiling point elevation.
Boiling point elevation is a thermodynamic phenomenon that occurs when the boiling point of a solvent (a substance that dissolves a solute to create a solution) is increased by adding another substance, the solute, to it. When a solute is added to a solvent, it lowers the freezing point and raises the boiling point of the solvent, which is known as the boiling point elevation.The formula for boiling point elevation is: ∆Tb = Kbm
Here, ∆Tb is the boiling point elevation, Kb is the molal boiling point elevation constant, and m is the molality of the solution. To understand this, let us take an example: Suppose a solution containing 1.0 mol of sodium chloride (NaCl) is dissolved in 1.0 kg of water. The molality of the solution is 1.0 mol / 1.0 kg = 1.0 m. In addition, the Kb for water is 0.51 °C/molal, which means that the boiling point elevation is 0.51 °C when the molality of the solution is 1.0 mol/kg.So, the boiling point of the solution will be raised by 0.51 °C, which can be calculated using the above formula.Calculation performed in this experiment:Boiling point elevation = ΔTb = Kb . mTherefore, based on the above formula, the boiling point elevation is directly proportional to the molality of the solution, which, in turn, is directly proportional to the number of moles of solute in the solution. Furthermore, the number of moles of solute is proportional to the mass of the solute (in grams) divided by its molar mass (in grams/mol).So, if a solute with a significantly higher molar mass is added to the solvent, it will have a larger effect on the boiling point elevation. As a result, the same mass of a solute with a higher molar mass will have a greater effect on the boiling point elevation.
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When aqueous solutions of manganese(II) sulfate and sodium phosphate are combined, solid manganese(II) phosphate and a solution of sodium sulfate are formed. The net ionic equation for this reaction is: _________
Answers
The net ionic equation for the reaction between manganese(II) sulfate (MnSO4) and sodium phosphate (Na3PO4) can be determined by writing the balanced molecular equation first and then identifying the species that undergo a chemical change and participate in the reaction.
The balanced molecular equation for the reaction is:
3MnSO4 + 2Na3PO4 → Mn3(PO4)2 + 3Na2SO4
To obtain the net ionic equation, we need to exclude the spectator ions, which are ions that do not participate in the chemical change. In this case, the spectator ions are the sodium ions (Na+) and sulfate ions (SO4²-) because they appear unchanged on both sides of the equation.
The net ionic equation for this reaction is:
3Mn²+ + 2PO4³- → Mn3(PO4)2
In the net ionic equation, we only include the species that undergo a chemical change, which in this case are the manganese(II) ions (Mn²+) and the phosphate ions (PO4³-).
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another name for folate is . a. pyridoxamine b. glutamic acid c. dfe d. folic acid e. foliage
Answers
folic Acid
Folic acid, often known as folate, is a water-soluble B vitamin that is necessary for the generation of healthy red blood cells and the regular functioning of the brain system. Folate is present in numerous foods, including leafy green vegetables, legumes, nuts, and grains. Numerous processed goods, including breakfast cereals, breads, and rice, contain it as well. Folic acid is essential for pregnant women because it prevents birth abnormalities. It is also crucial for people of all ages since it helps maintain the health and normal operation of the body's cells. Folic acid is also essential for the production and repair of DNA, as well as the breakdown of specific proteins. Without appropriate folic acid, the body cannot produce red blood cells effectively, which can result in anemia. It is essential to consume adequate amounts of folic acid through diet or supplementation.
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