How many moles are in 9.62 x 1023 atoms of Iron (Fe)?
Show work!!
Answers
Answer:
To determine the number of moles in 9.62 x 10^23 atoms of Iron (Fe), we need to use Avogadro's number, which is 6.022 x 10^23 particles per mole.
First, we need to divide the number of atoms by Avogadro's number to get the number of moles:
9.62 x 10^23 atoms / 6.022 x 10^23 atoms/mol = 1.599 moles of Iron (Fe)
Related Questions
adding aqueous sodium bicarbonate serves two purposes during the isolation step. why do we add aqueous sodium bicarbonate to isolate the isoamyl acetate? (answer in complete sentences)
Answers
The unreacted carboxylic acid and the catalyst (concentrated sulfuric acid) that are dissolved in the organic layer are neutralised by sodium bicarbonate.
Basic aqueous solutions of saturated sodium bicarbonate (NaHCO3) and sodium carbonate (Na2CO3) are used to neutralise an organic layer that may contain trace acidic components.
To extract the ester, add sodium bicarbonate to the solution to remove the remaining acid from the catalyst; also add water so that the hydroxyl end of the alcohol reacts with the hydrogen bonding of the water.
To begin, sodium carbonate would aid in the removal of all acidic impurities present in the reaction mixture. The formation of carbon dioxide by the addition of sodium carbonate indicates the presence of any acidic impurity, typically sulfuric acid.
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The removal of oxygen from a substance is known as what?
Answers
Answer:
Reduction
Explanation:
An easy thing to remember is:
Oxidation= adding oxygen
Reduction= taking away oxygen
Reduction (reduce)
What is the mass of 1.25 x \(10^{24}\) atoms of nitrogen?
Answers
Answer:
i dont know
Explanation:
trolololololololololololololololol
Will award you points!
Read the chemical equation. N2 + 3H2 – 2NH3 Using the volume ratio, determine how many liters of NH3 is produced if 3. 6 liters of H2 reacts with an excess of N2, if all measurements are taken at the same temperature and pressure? 5. 4 liters 2. 4 liters 1. 8 liters 1. 2 liters
Answers
Using this volume ratio, we can determine that (b) 2.4 liters of ammonia are produced when 3.6 liters of hydrogen reacts with an excess of nitrogen.
The given chemical equation represents the reaction between nitrogen and hydrogen to produce ammonia. The balanced equation shows that for every 3 volumes of hydrogen, 2 volumes of ammonia are produced.
According to the balanced chemical equation N₂ + 3H₂ → 2NH₃, for every 3 volumes of H₂, 2 volumes of NH₃ are produced.
Therefore, if 3.6 liters of H₂ reacts, the amount of NH₃ produced can be calculated as follows:
3.6 L H₂ * (2 L NH₃ / 3 L H₂) = 2.4 L NH₃
Therefore, 2.4 liters of NH₃ would be produced if 3.6 liters of H₂ reacts with an excess of N₂. The correct answer is option (b) 2.4 liters.
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What type of Intermolecular force causes the dissolution of KCl in water?
Answers
Ion-dipole interaction is responsible for dissolution of KCI in water and the reason is that the electrostatic attraction between an ion and a molecule containing a dipole.
How does KCL dissolve in water?
The hydration energy of K+Cl- is greater than the lattice energy of KCl. Water molecules surround K+ and Cl-, yet these ions are kept apart and dissolved in the water.
What is ionic dipole force?
An ion's electrostatic attraction to a neutral molecule with a dipole produces an attractive force known as the ion-dipole force.
What are the example of ion dipole force?
Ion-dipole forces are at work in solutions when an ionic chemical is dissolved into a polar solvent, for as in a solution of table salt (NaCl) in water.
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a phenomenon known as ____ occurs under conditions where a strong selection pressure acts on a particular change in an amino acid
Answers
The phenomenon known as "positive selection" occurs under conditions where a strong selection pressure acts on a particular change in an amino acid.
Positive selection is a process that leads to the fixation of a beneficial mutation in a population, and it is often associated with adaptations to new environmental conditions or host-pathogen interactions.
Positive selection can be detected by comparing the rates of non-synonymous (amino acid-changing) and synonymous (silent) substitutions in protein-coding genes, and it has important implications for understanding the evolution of molecular pathways and the emergence of novel functions.
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2 As (s) + 6 NaOH (aq) → 2 Na3AsO3 (s) + 3 H2 (g)
If 39.3g of As reacts with excess NaOH at STP, what volume of H2 will be produced in liters?
Answers
The volume of the hydrogen gas is 17.6 L.
What is the volume of the hydrogen gas that is produced?We know that the volume of the hydrogen that we can get using the stoichiometry of the reaction and that is what we are going to do here. We can see that from the question, we have;
Number of moles of the Arsenic = 39.3g /75 g/mol
= 0.524 moles
We have;
2 moles of arsenic produces 3 moles of hydrogen
0.524 moles of arsenic produces x moles of hydrogen
x = 0.524 moles * 3 moles/ 2 moles
= 0.786 moles
Mass of the oxygen = 0.786 moles * 22.4 L
= 17.6 L
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In an acid-base titration, the neutralization of 25.00 mL of a solution of KOH (potassium hydroxide) of unknown concentration required the addition of 22.60 mL of 0.1532 M HNO3 (nitric acid). Calculate the molarity of the potassium hydroxide solution.
Answers
The molarity of pottasium hydroxide solution in the acid-base titration is 0.138M.
How to calculate molarity?Molarity in chemistry refers to the concentration of a substance in solution, expressed as the number of moles of solute per litre of solution.
The molarity in an acid base titration procedure can be calculated as follows;
CaVa = CbVb
Where;
Ca = acid concentrationVa = acid volumeCb = base concentrationVb = base volumeAccording to this question, the neutralization of 25.00 mL of a solution of KOH (potassium hydroxide) of unknown concentration required the addition of 22.60 mL of 0.1532 M (nitric acid).
22.6 × 0.1532 = 25 × Cb
3.46232 = 25Cb
Cb = 0.138M
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a chemical that travels from a sending neuron to a receiving neuron is called a(n)
Answers
Answer: It is called a neurotransmitter
Explanation: I am the one who knocks
H2O + C --> H2 + CO2
1. Balance the equation,
2. what type reaction is this
A) 4:2:4:2
Decomposition
B) 2:1:2:1
Double Replacement
C) 1:1:1:2
Single Replacement
D) 2:1:2:1
Single Replacement
Answers
Answer:
B
Explanation:
can anyone do balance equation?
Answers
Determine if you can swim in 1×10^27 molecules of water
Answers
Water will expand more than ____________.
door
air
juice
Answers
Answer:
door
Explanation:
door I guess..................
How should students prepare to use chemicals in the lab?.
Answers
Answer:
Become familiar with the chemicals to be used, including exposure or spill hazards.
Locate the spill kits and understand how they are used.
Explanation:
Hope this helped! :)
a mixture of gases at 760.0 torr contains 35.0% nitrogen, 22.0% oxygen , and 43.0% carbon dioxide by volume. what is the pressure of the carbon dioxide gas in torr?
Answers
A mixture of gases at 760.0 torr contains 35.0% nitrogen, 22.0% oxygen , and 43.0% carbon dioxide by volume. what is the pressure of the carbon dioxide gas in 326.8 torr.
To solve this problem, we can use Dalton's law of partial pressures, which states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of each gas.
First, we need to convert the percentages of each gas by volume into their partial pressures. We can assume that the total volume of the mixture is 1 L, since the percentages are given by volume.
Partial pressure of nitrogen = 0.35 x 760.0 torr = 266.0 torr
Partial pressure of oxygen = 0.22 x 760.0 torr = 167.2 torr
Partial pressure of carbon dioxide = 0.43 x 760.0 torr = 326.8 torr
Now, we can use Dalton's law to find the total pressure of the mixture:
Total pressure = partial pressure of nitrogen + partial pressure of oxygen + partial pressure of carbon dioxide
Total pressure = 266.0 torr + 167.2 torr + 326.8 torr
Total pressure = 760.0 torr
Finally, we can find the pressure of the carbon dioxide gas by subtracting the partial pressures of nitrogen and oxygen from the total pressure:
Pressure of carbon dioxide = total pressure - partial pressure of nitrogen - partial pressure of oxygen
Pressure of carbon dioxide = 760.0 torr - 266.0 torr - 167.2 torr
Pressure of carbon dioxide = 326.8 torr
Therefore, the pressure of the carbon dioxide gas in the mixture is 326.8 torr.
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a salad dressing contains oil, vinegar, and water, which separates into an oil layer and a vinegar and water layer if left to sit. when this salad dressing is thoroughly shaken, it is an example of a . a) mixture of elements b) homogeneous mixture (solution) c) molecular compound d) heterogeneous mixture
Answers
When the salad dressing (consisting of water, oil, and vinegar) is thoroughly shaken, it is an example of a heterogeneous mixture, and not of a mixture of elements, a molecular compound or a homogenous mixture.
Water is a compound, while vinegar and oil are mixtures of compounds, so their mixture cannot possibly be a mixture of elements (option a) is eliminated). No new compound is formed upon their mixing, so it is not a molecular compound (eliminating option c)). The mixture of oil, vinegar, and water remains heterogeneous even when shaken, so option b) homogenous mixture is eliminated, with option d) heterogenous mixture remaining as the only possible option.
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EXTRA POINTS!
Which organism has Ganglia?
A: Sponge
B: fish
C: hydra
D: flatworm
Answers
Answer:
flatworm
Explanation:
Answer:
D.) Flatworm
Explanation:
Took the test :)
Analog and digital waves both need to be amplified after traveling a certain distance. Digital waves are amplified by a device known as a digital repeater. Analog waves are amplified by a device known as an amplifier.
A digital repeater works by reconstructing a new square wave wave from the incoming wave, even if the incoming wave includes
noise. An analog amplifier simply amplifies all of the information it receives, including noise. The diagram below illustrates how the resulting waves might appear.
The example above suggests that?
А. there is no clear advantage to transmitting digital waves over analog waves.
B. digital waves cannot have noise or other distortions removed from them.
C. noise is less of a problem for digital waves than for analog waves.
D. analog waves do not experience as much noise as digital waves.
Answers
Answer:
C. noise is less of a problem for digital waves than for analog waves.
Explanation:
Answer: C
Explanation: Study Island
6.
A crystal of the purple compound potassium manganate (VII) is placed at the bottom
of a beaker of water and the beaker left until there
is no further change. What will be
observed?
A a uniformly purple solution.
B
a purple layer below a colourless layer.
С a colourless layer below a purple layer.
D a deep purple layer below a pale purple layer.
Sec 3/KPT and SMS/2021
Page 2 of 3
Answers
Answer:
I don't know
Explanation:
sorry i just need point to ask so i have comment
changing the position of the .. increases or decreases your effort ..
Answers
The pulley is normally fixed to a support above the load. The load is tied to one end of the rope and the effort is applied at the other end. Such a pulley makes our work easier by simply changing the direction of the force, i.e. a load is lifted up using a downward effort.
Help with # 29 pleaseUsing Bohr's equation for the energy levels of the electron in they Hydrogen atom, determine the energy in J of an electron in the n=4 level.
Answers
Using Bohr's equation for the energy levels of the electron in the Hydrogen atom, determine the energy in J of an electron in the n=4 level.
According to Boh'rs equation we can calculate the energy using this equation:
En = - 2.18 * 10⁻¹⁸ J / (n²)
So if we want to find the energy we only have to replace n by 4 and solve that calculation:
since n = 4
En = - 2.18 * 10⁻¹⁸ J / 4²
En = - 2.18 * 10⁻¹⁸ J / 16
En = -1.36 * 10⁻¹⁹ J
So the answer is option D
An aerosol can contains gases under a pressure of4.5atmat16◦C. Ifthecanisleftona hot sandy beach, the pressure of the gases increases to 4.81 atm. What is the Celsius temperature on the beach?
Answer in units of ◦C.
Answers
The Celsius temperature on the beach is approximately 35.8 degrees Celsius.
The pressure-temperature relationship is governed by Charles' Law, which states that as long as pressure is constant, the volume of a gas will be directly proportional to its temperature.The equation used to determine the relationship between temperature and pressure is as follows: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the universal gas constant, and T is the temperature in Kelvin (K).Let's utilize the formula given above to find the temperature of the beach:P1V1/T1 = P2V2/T2We can substitute the values we've been provided to solve for T2 : When the can is at 16 degrees Celsius and 4.5 atm, the pressure is:P1 = 4.5 atmT1 = 16°C + 273 = 289 KV1 and V2, which are the same, can be omitted. P2 = 4.81 atm Substituting these values in the equation : P1V1/T1 = P2V2/T2V1 and V2 are equal and can be eliminated. We can also change the temperature to Kelvin, so:T2 = (P2 * T1 * V1) / (P1 * V2)T2 = (4.81 atm * 289 K) / 4.5 atmT2 = 308.8 KSubtract 273 to convert back to Celsius : T2 = 308.8 K - 273 K = 35.8 degrees Celsius.
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Why do you think hormones become so prominent during puberty?
Answers
During puberty, the body increases its production of hormones, particularly sex hormones such as estrogen and testosterone. These hormones play a critical role in the physical changes that occur during puberty, such as the development of breasts in females and the growth of facial hair in males. They also stimulate the growth and development of reproductive organs and contribute to the changes in body composition that occur during puberty.
The increase in hormone production during puberty is triggered by a complex interplay of genetic, environmental, and social factors. Genetic factors play a significant role in determining the timing and rate of puberty, while environmental factors such as nutrition and stress can also affect hormone production. Social factors, such as cultural norms and expectations, can also influence the timing and expression of puberty.
In summary, hormones become so prominent during puberty because they are responsible for many of the physical, emotional, and behavioral changes that occur during this time. The increase in hormone production during puberty is triggered by a complex interplay of genetic, environmental, and social factors, and is an essential part of the normal development process.
A sample of sulfur consisting of three isotopes has a relative atomic mass of 32.133. The following table gives the relative abundance of two of these isotopes. Mass number of isotope 32 33 Relative abundance / % 92.4 1.9 Use this information to determine the mass number of the third isotope. Give your answer to the appropriate number of significant figures.
Answers
The mass number of the third isotope, given the data from the question is 34
How to determine the mass numberThe mass number of the third isotope can be obtained as illustrated below:
Relative atomic mass =32.133Mass of 1st isotope = 32Abundance of 1st = 92.4%Mass of 2nd isotope = 33Abundance of 2nd = 1.9%Abundance of 3rd = 100 - (92.4 + 1.9) = 5.7%Mass of 3rd isotope = ?Relative atomic mass = [(Mass of 1st × Abundance of 1st) / 100] + [(Mass of 2nd × Abundance of 2nd) / 100] + [(Mass of 3rd × Abundance of 3rd) / 100]
32.133 = [(32 × 92.4) / 100] + [(33 × 1.9) / 100] + [(Mass of 3rd × 5.7) / 100]
32.133 = 29.568 + 0.627 + (Mass of 3rd × 0.057)
32.133 = 30.195 + (Mass of 3rd × 0.057)
Collect like term
32.133 - 30.195 = Mass of 3rd × 0.057
1.938 = Mass of 3rd × 0.057
Divide both sides by 0.057
Mass of 3rd = 1.938 / 0.057
Mass of 3rd = 34
Thus, we can conclude that the mass of the 3rd isotope is 34
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Missing part:
See attached photo
Balance the following equation: __Ch4+__O2→__CO2+__H2O
Answers
Answer:
1,2,1,2
Explanation:
You would need only one of the CH4 but 2 of the O2 then 1 CO2 and 2 H2O on each side of the equation you now have 1 carbon, 4 hydrogen, and 4 oxygen.
Define unknown solutions
Answers
Answer:
A titration is a technique where a solution of known concentration is used to determine the concentration of an unknown solution. Typically, the titrant (the know solution) is added from a buret to a known quantity of the analyte until the reaction is complete
Help which one will it be
Answers
Answer:
D
Explanation:
Answer:
the answer is D I did that one in 5th grade
Why do the planets in our solar system orbit in approximately the same plane around the sun?
Answers
http://curious.astro.cornell.edu/about-us/57-our-solar-system/planets-and-dwarf-planets/orbits/242-why-do-all-the-planets-orbit-in-the-same-plane-intermediate
PLEASE CHEMISTRY HELP IS NEEDED PLEASE
Answers
Based on the balanced equation of the reaction, the completed table is as follows:
2.0 moles of N₂, 56 g of N₂; 1.0 moles of Ti₃N₄; 200.0 g of Ti₃N₄
6.0 moles of N₂, 168 g of N₂; 3.0 moles of Ti₃N₄; 600.0 g of Ti₃N₄
1.0 moles of N₂, 28 g of N₂; 0.5 moles of Ti₃N₄; 100.0 g of Ti₃N₄
7.0 moles of N₂, 196 g of N₂; 3.5 moles of Ti₃N₄; 700.0 g of Ti₃N₄
12.6 moles of N₂, 352.8 g of N₂; 6.3 moles of Ti₃N₄; 1260.0 g of Ti₃N₄
What is a balanced equation of the reaction?A balanced equation is one for a chemical reaction in which the overall charge and the number of atoms for each component are the same for both the reactants and the products.
In other words, the moles of atoms of elements on both sides of the reaction are equal.
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HELP
Balance the following skeleton equation and determine how many grams of water can be produced when 50.0 grams of Al(OH)3 react with 60.0 grams of H2SO4 .
Al(OH)3 + H2SO4 --> Al2(SO4)3 + H2O
Answers
Explanation:
2Al(OH)3 + 3H2SO4 --> Al2 (SO4)3 + 6H2O