Answers
Answer:
\(Fe_3PO_4\)
Explanation:
To do this, we find the moles of each element. We get around 0.155 moles of Fe, 0.051 moles of P, and 0.206 moles of O. We then divide each one by the smallest one (which is 0.051 moles of P). We then get 3 for Fe, 1 for P, and 4 for O. This correlates to the empirical formula of the compound.
The empirical formula for the compound is \(Fe_3PO_4\) if a 13.58 g sample of a compound contains 8.67 g of iron, Fe, 1.60 g of phosphorus, P, and oxygen, O.
What is the empirical formula?
An empirical formula tells us the relative ratios of different atoms in a compound.
We need to calculate the number of moles:
Given data:
Mass of iron - 8.67 g
Mass of phosphorus -1.60 g
Mass of oxygen -3.31 g
Moles of iron - \(\frac{mass}{molar \;mass}\)
Moles of iron - \(\frac{8.67 g}{56 g/mol}\)
0.15 mole
Moles of phosphorus \(-\frac{mass}{molar \;mass}\)
Moles of phosphorus - \(\frac{1.60 g}{31 g/mol}\)
0.051 moles
Moles of oxygen -\(\frac{mass}{molar \;mass}\)
Moles of oxygen - \(\frac{3.31 g}{16 g/mol}\)
0.20 moles
Dividing each mole using the smallest number that is divided by 0.051 moles.
Fe:P:O :: 3:1:4
The empirical formula for the compound is \(Fe_3PO_4\).
Learn more about empirical formula here:
brainly.com/question/14044066
#SPJ1
Related Questions
Assume that silver and gold form ideal, random mixtures. Calculate the mass of pure Ag needed to cause an entropy increase of 20 J/K when mixed with 100g of pure Au
Answers
Answer:
\(m_{Ag}=2,265.9g\)
Explanation:
Hello!
In this case, since the definition of entropy in a random mixture is:
\(\Delta S=-n_TR\Sigma[x_i*ln(x_i)]\)
For this silver-gold mixture we write:
\(\Delta S=-(n_{Au}+n_{Ag})R\Sigma[\frac{n_{Au}}{n_{Au}+n_{Ag}} *ln(\frac{n_{Au}}{n_{Au}+n_{Ag}} )+\frac{n_{Ag}}{n_{Au}+n_{Ag}} *ln(\frac{n_{Ag}}{n_{Au}+n_{Ag}} )]\)
By knowing the moles of gold:
\(n_{Au}=100g*\frac{1mol}{197g} =0.508mol\)
It is possible to write the aforementioned formula in terms of the variable \(x\) representing the moles of silver:
\(20\frac{J}{mol}=-(0.508+x)8.314\frac{J}{mol*K} \Sigma[\frac{0.508}{0.508+x} *ln(\frac{0.508}{0.508+x} )+\frac{x}{0.508+x} *ln(\frac{x}{0.508+x} )]\)
Which can be solved via Newton-Raphson or a solver software, in this case, I will provide you the answer:
\(x=n_{Ag}=21.0molAg\)
So the mass is:
\(m_{Ag}=21.0mol*\frac{107.9g}{1mol}\\ \\m_{Ag}=2,265.9g\)
Best regards!
List the 2 pKa's for H2SO4
Answers
is BIG LION radioactive.
Answers
Answer:
So cute and my favorite is Lion and ot is my inner pet with my zodiac sign so cute hehe
14. Which group below correctly list bases that completely dissociate in water?
O a. NaOH, KOH, LIOH
O b. NH3, NH4OH, HCI
C. NaOH, H3PO4, MgOH
O d. NaOH, KOH, H2CO3
15. When the oxidation number increases the element is
decreases the element is
and if the oxidation number
O a. reduced, reduced
O b. reduced, oxidized
O c. oxidized, oxidized
O d. oxidized, reduced
16. The oxidation number for O in NaHCO3 is
O a. 1-
O b. 1+
O c. 2-
O d. 2+
17. The oxidation number for Na, Cr, and o respectively in the compound Na2Cro4
O a. 6+, 1+, 2+
O b. 1+, 6+, 2-
O c. 2-, 1+, 6+
O d. 1-, 2-, 3+
18. CuSO4 + 2NaOH --> Cu(OH)2 + Na2S04
The reaction above represents
O a. Oxidation
O b. Reduction
O c. Neutralization
O d. None of the above
19. A balloon with a volume of 5.0 L is filled with a gas at 2 atmospheres. If the pressure is reduced
to 1 atmospheres without a change in temperature, what would be the volume of the balloon?
O a. 5.0 L
b. 10 L
O c. 12 L
O d. 10 ml
Answers
Answer:14=D
15=B
16=D
17=C
18=A
19=D
Explanation: I did this and got a 100% °³°
If an insufficient amount of liquid unknown had been used, how would this have effected the value of the experimental molar mass
Answers
Answer:
Actual yield reduces the more.
Explanation:
An actual yield of the course of a chemical reaction is the mass of a product actually obtained from the reaction.
In practice you see it and It is usually less than the theoretical yield.
Various reasons may come up to explain this away but here is one:
• incomplete reactions, simply put here some of the reactants do not react to form the product.
The same applies in the question about the actual yield will reduce significantly in molar mass now that insufficient amount of reagent are used.
Avogadro's hypothesis. At the same volume, pressure, and temperature, samples of different gases have the same number of molecules but different masses.How many moles of gas are in each vessel
Answers
Answer:
n = m/M
Explanation:
From the question, we're told that we have the following parameters constant, i.e, they don't change
Volume of V
Pressure of P
Temperature of T
Also, we're told that the gases in comparison have the same number of molecules,
Although they have different masses, which is only logical since they're all different gases.
We're asked to find the number of moles of gas in each vessel.
Finding the number of moles is represented by the formula,
n = m / M, where
n = number of moles we're interested in
m = mass of the gas, that we're told differs from each gas
M = molar mass of the gases that is unique to each and every gas.
That is how you find the number of moles of the gases in the vessel
What are aliphatic aldehydes? Class 12
Answers
Answer:
Explanation: The aldehydes in which the aldehydic functional group (−CHO) is attached to a saturated carbon chain are called Aliphatic aldehydes.
I need help figuring it out the answers were wrong I put in
Answers
A sample of nitrogen gas occupies a volume of 255 mL at 0.974 atm pressure. what volume will it occupy at 1.05 atm pressure?
Answers
The sample of nitrogen gas will occupy 236.54 mL of volume at 1.05 atm pressure.
Give a brief account on Boyle's Law.Boyle's law is the ideal law that defines the relationship between pressure and volume of gases. A law is given if the temperature is kept constant. Pressure and volume exhibit an inverse relationship.
The Boyle's Law is given as:
P₁V₁ = P₂V₂
Given,
Initial pressure (P₁) = 0.974 atm
Initial volume (V₁) = 255 mL
Final pressure (P₂) = 1.05 atm
Final volume = V₂
The final volume at 1.05 atm is calculated by substituting values in Boyle's Law as:
P₁V₁ = P₂V₂
0.974 × 255 = 1.05 V₂
V₂ = 248.37 ÷ 1.05
= 236.54 mL
To know more about Boyle's law, visit:
https://brainly.com/question/30367133
#SPJ1
round off each of the following numbers to two significant figure 0.436 and 9.000
Answers
Answer:
0.436 ⇒ 0.44
9.000 ⇒ 9.0
Concept:
Significant figures are where each of the digits of a number are used to express it to the required degree of accuracy, starting from the first nonzero digit.
Therefore, in the context of this question, two significant figure means that two digits of numbers are kept, from left to right, starting from the first nonzero digit.
Solve:
PART I: Rounding 0.4360.436 has 3 significant digits in total starting from left to right
Thus, the last digit should be rounded up / down
Since the last digit is 6, it is greater than 5, so it should be rounded up.
Therefore, a rounded 0.436 is \(\Large\boxed{0.44}\)
PART II: Rounding 9.0009.000 has 4 significant digits in total starting from left to right
Thus, the last two digits should be rounded up / down
Since the last two digits are 0, it is less than 5, so it should be rounded up (or remained).
Therefore, a rounded 9.000 is \(\Large\boxed{9.0}\)
Hope this helps!! :)
Please let me know if you have any questions
What is solubility ?
A solution in which no more solute will dissolve
The amount of solute it takes to make a supersaturated solution
The amount of solute that will dissolve in a given amount of solvent
The amount of solvent it takes to dissolve 100 g of solute
Answers
Answer:
The amount of solute that will dissolve in a given amount of solvent.
Explanation:
edge 2020
A solution is defined as a homogeneous mixture of one or more solutes present in a solvent. The amount of solute that will dissolve in a given amount of solvent is solubility. The correct option is B.
What is solubility?At a particular temperature, the maximum amount of solute that can dissolve in a given known quantity of solvent is defined as the solubility. The property which helps sugar molecules to dissolve in tea or coffee is called solubility.
The term solubility product of a sparingly soluble salt is known as the product of molar concentrations of its ions in a saturated solution of it at a given temperature. The solubility product is used to predict the precipitation in a reaction.
If the ionic product exceeds the value of the solubility product then the precipitation of an ionic substance from solution occurs.
Thus the correct option is B.
To know more about solubility, visit;
https://brainly.com/question/8591226
#SPJ6
For a theoretical yield of 23 g and actual
yield of 13 g, calculate the percent yield for a
chemical reaction.
1. 63.6364
2. 76.4706
3. 71.4286
4. 57.1429
5. 56.5217
6. 40
7. 70
8. 60
9. 52.6316
10. 41.6667
Answer in units of %.
Answers
Answer:
5. 56.5217
Explanation:
Calculate percent yield by (actual yield / theoretical yield) times 100
(13/23) x 100 = 56.52173913
Helpppp me pleaseeee now I’ve been struggling so bad w this
Answers
Answer:
I don't know what the passage says, but I feel like the most logical conclusion is D or the last one.
Explanation:
Answer:
D! Hope this helps! Figured id help with all of ur questions!
Explanation:
Im a wiz at science! ;)
Which of the following equations correctly describes how to calculate net income? a. net income = (cost of goods sold) - (net sales) - (operating expenses) b. net income = (operating expenses) - (cost of goods sold) - (net sales) c. net income = (operating expenses) + (cost of goods sold) - (net sales) d. net income = (net sales) - (cost of goods sold) - (operating expenses) Please select the best answer from the choices provided A B C D Mark this and return
Answers
Answer:
The answer is D. net income= (net sales) - (cost of goods sold)- (operating expenses).
Explanation:
The irreversible isomerization A
B was carried out in a batch reactor and the following concentration time data were obtained:
Time vs Concentration data in a Batch reactor
t 0 3 5 8 10 12 15 7.5
mol/h 4 2.89 2.25 1.45 1.0 0.65 0.25 0.07
Determine the reaction order,
, and the specific reaction a rate constant, k, using any method of your choice.
Answers
The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.
The term "kinetics" refers to the study of reaction rates, which are determined by measuring the concentration of reactants and products as a function of time.Kinetics experiments can be used to determine the reaction rate and order of reaction. A chemical reaction's rate is defined as the change in the concentration of a reactant or product per unit time. The order of a reaction refers to the number of molecules that must react to produce a product. The order of reaction can be determined by measuring the initial rate of the reaction as a function of concentration.Methods for determining the reaction rate order include the initial rate method, the half-life method, and the integrated rate method. The initial rate method determines the reaction order by measuring the initial rate of the reaction at different reactant concentrations. The half-life method determines the reaction order by measuring the time it takes for the reactant concentration to decrease by half.The integrated rate method determines the reaction order by measuring the concentration of the reactant or product at different times.The specific rate constant can be determined by using the Arrhenius equation, which relates the rate constant to the activation energy, temperature, and frequency factor. The frequency factor can be determined by measuring the rate constant at different temperatures.For such more question on polymerization
https://brainly.com/question/1602388
#SPJ8
list the original states (solid, liquid, or gas) of the solute and solvent that are combined to make each of the following solutions.
Answers
These are the combinations for the original states (solid, liquid, or gas) of the solute and solvent.
What is solute?
The term "solute" refers to a material that has dissolved in a solution. In fluid solutions, there are more solvent molecules than solute molecules. Salinity and water are two excellent examples of solutes in daily life. The solute is salt because it dissolves in water.
What is solvent?
The ingredients that are utilized as solutes in the formulation are dissolved using solvents. Solids, liquids, or gases may make up these solutes. In order to obtain a solution, a suitable solvent is utilized in conjunction with the solute.
Hypotonic, isotonic and hypertonic solutions (tonicity).
Solute-Solvent Combinations.
Gas-Gas Solutions.
Solid-Solid Solutions.
Liquid-Liquid Solutions.
Therefore, these are the combinations for the original states (solid, liquid, or gas) of the solute and solvent.
Learn more about solute from the given link.
https://brainly.com/question/11337199
#SPJ4
Define Valency in your own words
Answers
The combining capacity of an atom of the element by either sharing, gaining or loosing electrons is known as valency.
_______
RainbowSalt2222 ☔
100.0 g CO2 reacts with 100.0 g H2O according to the equation below.
6CO2 + 6H2O -> 6O2 + C6H12O6
How many grams of glucose, C6H12O6 form from the 100.0 g H2O
[ ? ] g C6H12O
Answers
The mass of glucose produced from 100.0 g H2O is 166.8 g C6H12O6.
Given:100.0 g CO2 reacts with 100.0 g H2O according to the equation below.
6CO2 + 6H2O → 6O2 + C6H12O6
How many grams of glucose, C6H12O6 form from the 100.0 g H2O
According to the reaction, 6 moles of water react with 6 moles of carbon dioxide to produce one mole of glucose and 6 moles of oxygen.
Balanced Chemical Equation:
6CO2 + 6H2O → 6O2 + C6H12O6
We have given the mass of H2O, so first, we will calculate the number of moles of H2O.
Number of moles of H2O:
Mass of H2O = 100.0 g
Molar mass of H2O = 18 g/mol
Number of moles of H2O = Mass/Molar mass
= 100.0 g/18 g/mol
= 5.56 moles
Now, we know that 6 moles of water react with 1 mole of glucose.
So, the number of moles of glucose produced:Number of moles of glucose:
6 moles H2O → 1 mole glucose5.56 moles H2O → (1/6) x 5.56 = 0.9267 moles glucose
Now we will calculate the mass of glucose from the number of moles of glucose.
Mass of glucose:Number of moles of glucose = 0.9267 moles
Molar mass of glucose = 180.2 g/mol (C6H12O6)
Mass of glucose = number of moles x Molar mass
= 0.9267 moles x 180.2 g/mol
= 166.8 g
Therefore, the mass of glucose produced from 100.0 g H2O is 166.8 g C6H12O6.
For such more questions on mass of glucose
https://brainly.com/question/29022388
#SPJ8
what’s is the answer?
Answers
The energy of the photon of light can be obtained as 6.27 * 10^-20 J.
What is the energy of the photon?We know that a photon has to to do with a particular unit of light. We know that light can be said to be composed of very tiny corpuscles and these corpuscles of light is what we call the photon of the light.
We can be able to us the equation that is derived by Max Plank to be able to get the value of the energy of the photon of light. Now we know that a photon of light can have an energy that is able to be obtained by;
E = hf
h = Plank's constant
f = Frequency
Then;
E = 6.6 * 10^-34 Js * 9.5 * 10^13 Hz
= 6.27 * 10^-20 J
Thus as we can see from the parameters in the question, the energy of the photon is 6.27 * 10^-20 J.
Learn more about energy of the photon:https://brainly.com/question/2393994
#SPJ1
A gene carries the ________ for a trait. brainpop
Answers
PLEASE SOLVE THIS 100 POINTS TO BRAINLIEST!!
Answers
When an organism is homozygous, it contains two copies of the same allele for a gene. If two copies of the same recessive allele are present, the condition is homozygous recessive. Fifty percent of the offspring are homozygous recessive.
Given that oxygen -16 and oxygen -18 both havean atomic number of 8, how many electrons, protons and neutrons do these oxygen atoms contain
Answers
Oxygen-16: 8 protons, 8 neutrons, 8 electrons
Oxygen-18: 8 protons, 10 neutrons, 8 electrons
Explanation:Using atomic and mass numbers, we can find information about the makeup of atoms.
Protons
Every element has a unique number of protons, and every atom of the same element will have the same number of protons. This means that both oxygen atoms must have the same number of protons. The number of protons in an element is equal to its atomic number. Since oxygen has an atomic number of 8, all oxygen atoms will have 8 protons. This means that oxygen-16 and oxygen-18 have 8 protons.
Neutrons
The number of neutrons an atom of a certain element can have varies. Atoms of the same element that have different numbers of neutrons are known as isotopes. The number of neutrons can be found through the mass number. The mass number is the number that follows the dash in the name of the isotope. This number is equal to the protons plus the neutrons. So, to find the number of neutrons in an oxygen atom, subtract 8 protons from the mass number. This means oxygen-16 has 8 neutrons and oxygen-18 has 10 neutrons.
Electrons
Remember that electrons are negatively charged, protons are positively charged, and neutrons have no charge. The number of electrons in an atom determines the charge of the atom. If the number of electrons equals the number of protons, then the charge of the atom will equal 0. If there are more electrons, then the atom will be negatively charged and vice versa. Since neither of the atoms has any indication of a nonzero charge, the number of electrons must equal the number of protons. So, both oxygen atoms have 8 electrons.
describe what xeriscaping is and what is involved in a successful xeriscaping project
Answers
Xeriscaping is a landscaping approach that focuses on conserving water by using drought-tolerant plants and efficient irrigation techniques. The goal is to create a visually appealing and sustainable garden while minimizing water usage.
Successful xeriscaping projects involve several key elements. Firstly, careful plant selection is crucial, opting for species that can thrive in arid conditions without excessive watering. Mulching is used to reduce evaporation and retain soil moisture.
Proper soil preparation, such as improving drainage and adding organic matter, promotes healthier plant growth. Efficient irrigation systems, like drip irrigation or soaker hoses, deliver water directly to plant roots, minimizing wastage.
Additionally, controlling erosion through the use of retaining walls or terracing is important. Lastly, regular maintenance, including appropriate pruning and weed control, ensures the longevity and vitality of the xeriscape garden. Overall, a successful xeriscaping project harmonizes sustainable practices with a beautiful outdoor environment.
For more such questions on Xeriscaping
https://brainly.com/question/12960529
#SPJ11
What volume would 0.435 moles of hydrogen gas, Hz, occupy at STP?
Answers
Answer:
will be 9.7 Liters
Explanation:
Rank the following compounds in order of decreasing acid strength using periodic trends.Rank the acids from strongest to weakest. To rank items as equivalent, overlap them.
HI, HBr, MgH2, H2Se.
Answers
Explanation:
H2Se, HBr, MgH2, Hl
Because H2Se is stronger than Hl..
Theories are used to make predictions true or false
Answers
Answer:
True
Explanation:
Theories are ideas which are used to make predictions
choose all characteristics of carotenoids. multiple select question. they have long hydrocarbon chains with alternating single and double bonds.
Answers
They absorb photons within a very narrow range of wavelengths. Therefore, the correct option is option C.
What is carotenoids?Tetraterpenoids, commonly known as carotenoids, are organic pigments which are generated by a variety of bacteria, fungi, plants, and algae in the colors yellow, orange, and red.
All of these species can manufacture carotenoids from lipids and other essential organic metabolic building blocks. Furthermore, endosymbiotic bacteria inside whiteflies make it. They absorb photons within a very narrow range of wavelengths.
Therefore, the correct option is option C.
To know more about carotenoids, here:
https://brainly.com/question/29969572
#SPJ1
Your question is incomplete but most probably your full question was,
Choose all characteristics of carotenoids.
a. they have several porphyrin rings.
b. They have long hydrocarbon chains with alternating single and double bonds.
c. They absorb photons within a very narrow range of wavelengths.
d. They are not always highly efficient at transferring the energy they have absorbed.
Perform the following calculations and then determine the correct answer following the significant figure rules: 8.7 g + 15.43 g + 19 g = ?
43.1 g
43.13 g
43 g
43.0 g
Answers
The table describes a gas stored in four different containers. Properties of Stored Gas Container Properties 1 · Low number of collisions with container walls · Medium average kinetic energy · Large number of particles 2 · Large number of collisions with container walls · Medium average kinetic energy · Small number of particles with little spaces between them 3 · Large number of collisions with container walls · High average kinetic energy · Large number of particles with large spaces between them 4 · Few collisions with container walls · Low average kinetic energy · Small number of particles Which container has gas stored at the highest temperature? 1 2 3 4
Answers
Container 3 has the gas stored at the highest temperature.
Temperature is a measure of the average kinetic energy of the particles in a substance. In the given table, it is stated that container 3 has a large number of collisions with container walls, high average kinetic energy, and large number of particles with large spaces between them.
These properties indicate that the gas in container 3 has higher kinetic energy and more vigorous movement compared to the other containers.
Container 1 has a low number of collisions with container walls and a medium average kinetic energy. This suggests that the gas in container 1 has lower energy and less movement than the gas in container 3.
Container 2 has a large number of collisions with container walls, but it also has a small number of particles with little spaces between them. While the collisions may be frequent, the limited number of particles and the lack of space between them may result in lower overall kinetic energy compared to container 3.
Container 4 has few collisions with container walls, low average kinetic energy, and a small number of particles. These properties indicate that the gas in container 4 has the lowest energy and least movement among all the containers.
Container 3
For more such questions on temperature visit;
https://brainly.com/question/4735135
#SPJ8
Which subatomic particle cannot change in an atom?
Proton, Neutron, Electron
Answers
Answer: Protons cannot change in an atom because that would change the identity of a particle. Electrons on the other hand can be added or removed creating an ion. Neutrons can also be added or removed to create an isotope.