The empirical formula for the compound that contains only nitrogen and oxygen and is 36.9% nitrogen by mass is N₂O₃. Option e is correct.
Let's assume we have a 100g sample of this compound. Then, the mass of nitrogen in the compound would be 36.9g (since it is 36.9% nitrogen by mass), and the mass of oxygen would be 100g - 36.9g = 63.1g.
The atomic mass of nitrogen is 14.01 g/mol, and the atomic mass of oxygen is 16.00 g/mol. Therefore, the number of moles of nitrogen in the compound is 36.9g / 14.01 g/mol ≈ 2.63 mol, and the number of moles of oxygen is 63.1g / 16.00 g/mol ≈ 3.94 mol.
Here, the smallest mole value is 2.63, so we divide both mole values by 2.63,
Nitrogen: 2.63 mol / 2.63 = 1 mol
Oxygen: 3.94 mol / 2.63 ≈ 1.5 mol
Therefore, the empirical formula for the compound is \(N_1O_{1.5}\), which we can simplify to N₂O₃ by multiplying both subscripts by 2. The empirical formula represents the smallest whole-number ratio of atoms in the compound. Hence option e is correct choice.
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The following solutions are prepared by dissolving the requisite amount of solute in water to obtain the desired concentrations. Rank the solutions according to their respective osmotic pressures in decreasing order assuming the complete dissociation of ionic compounds.Rank from highest to lowest osmotic pressure. To rank items as equivalent, overlap them.1M MgCl2, 1M KCl, 2M CH3CH2CH2OH, 1M C12H22O11
The order according to their respective osmotic pressures is C₆H₁₂O₆ < NaCl ≈ CH₃OH < MgCl₂.
What is osmotic pressure?
The pressure difference required to stop solvent from flowing through a semipermeable membrane is known as the osmotic pressure of a solution. The relationship between a solution's osmotic pressure and molar concentration of its solute particles
The formula for osmotic pressure (Π) is
Π = icRT
If T is constant,
Π = kic
C₆H₁₂O₆:
Π = k × 1 × 1 = k
MgCl₂:
Π = k × 3 × 1 = 3k
CH₃OH:
Π = k × 1 × 2 = 2k
NaCl:
Π = k × 2 × 1 = 2k
Hence, The order of osmotic pressures is C₆H₁₂O₆ < NaCl ≈ CH₃OH < MgCl₂
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Which of the following could fom an ionic bond with an anion?
O Hg2+
O NO
O so,2-
O Ar
Answer:
the correct answer is A, Hg22+ on edge 2020
Explanation:
i took the review
\(\rm Hg^{2+}\) among the following could form an ionic bond with an anion. Therefore, the correct option is option A.
A specific kind of chemical bond known as an ionic bond is created when two atoms or ions with distinctly dissimilar electronegativities come together. When two atoms have a strong inclination to gain electrons and a strong tendency to lose electrons, it happens. One atom donates one or more electrons to the other as a consequence, which strongly attracts the oppositely charged ions through electrostatic forces.
Mercury is an ion, and the cation \(\rm Hg^{2+}\) has a 2+ charge. With an anion, it is able to establish an ionic bond. Nitric oxide (NO) is a neutral molecule, not an ion. With an anion, it is unable to create an ionic bond. Sulfite ion \(\rm SO^{2- }\)is an anion with a 2-charge. With another anion, it is unable to create an ionic bond. Ar is not an ion but a neutral argon atom. With an anion, it is unable to create an ionic bond.
Therefore, the correct option is option A.
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What is the volume occupied by 0.263 mol of Helium gas at 1.15 atm and 307 K?
For this question, since we are given the pressure, number of moles and temperature to find the volume, we have to use the ideal gas equation.
pV = nRT
Now lets put in the values
V = (0.263 mol x 8.314 J/mol x 307 k)/1.15 atm
V = 583.722 L
.
if he loses half this energy by evaporating water (through breathing and sweating), how many kilograms of water evaporate? the latent heat of vaporization of water is lv
2.59 kilograms of water evaporate, if latent heat is lv.
Q = m lv = 3000 kCal / 2
m = 3000 / 2 lv
lv = 580 kCal /kg
m = 2.59 kg
Hence, 2.59 kilograms of water evaporate, if latent heat is lv.
The heat energy that has to be supplied to change the state of a substance without changing the temperature of the substance is called its latent heat.
Latent heat is the power launched or absorbed by means of a body whilst changing it nation with out upward thrust or fall in temperature . including greater warmness to the water has no impact on temperature. as a substitute, it causes the water to trade nation (or vaporize) from a liquid to a gasoline.
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Which of the following species has the largest dipole moment (i.e., is the most polar)?. A.CH3Cl. B.CH4. C.CH3F. D.CH3Br.
Species which has the largest dipole moment is CH3Cl.
What is dipole moment?Dipole moment can be defined as the product of the distance between the centers of positive and negative charge and the magnitude of the charge. It is denoted by μ.
The trend of dipole moment in case of yhe halogens areas below:
Dipole moment always depends on distance and charge. Due to decrease in the electronegativity of halogen as we move down the group the difference in the electronegativity between carbon and halogen atom also decreases on going down the group from Fluorine to Iodine. On the other hand, the distance between carbon and halogen atom goes on increasing on moving down the group from Fluorine to Iodine due to increase in size on going down the group in the halogen family.The dipole moment of species CH3Cl is greater than CH3F due to the electron affinity.
Thus, we concluded that species which has the largest dipole moment is CH3Cl.
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Areas near large bodies of water tend to have which type of climate
Answer:
mild
Explanation:
The first three ionization energies of an element x are 590, 1145, and 4912 kj/mol. what is the most likely formula for the stable ion of x
Based on the provided information, the most likely formula for the stable ion of element x is X³⁺. The main answer is X³⁺. The explanation is that the first three ionization energies of an element correspond to the removal of electrons from the atom.
The fact that the third ionization energy is significantly higher than the first and second suggests that three electrons have been removed to form a stable ion. Therefore, the most likely formula for the stable ion of element x is X³⁺.
Ionization energy, also known as ionization potential, is the amount of energy required to remove an electron from a neutral atom or ion in the gaseous state. It is typically measured in units of electron volts (eV) or kilojoules per mole (kJ/mol).
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(blank) are the fastest form of radiation?
Answer: Gamma particles
Answer:
Gamma rays, are the fastest.
Explanation:
They literally move at the speed of light, I hope this helps you.
What are two qualities of nonmetals? Describe each
Answer:
In the elemental form, non-metals can be gas, liquid or solid. They aren't shiny (lustrous) and they don't conduct heat or electricity well. Usually their melting points are lower than for metals, although there are exceptions. The solids usually break easily, and can't bend like metals
Explanation:
An element has the electron configuration of
wak
1s 2s 2p 3s 3p 3d¹04s²4p 4d¹4f5s25p65d¹6s². In this ele
ment's photoelectron spectroscopy emission spectrum, the
peak that represents which subshell would have the smallest
being ren
height?
(A) 1s
(B) 4f
(C) 5d
(D) 6s
Answer: (A) 1s
Explanation:
What would happen to the density of an object if the mass is increased, but the volume does not change?
Answer:
If the volume stays the same, then an increase in mass will cause an increase in density. However, an increase in mass along with an increase in volume can give rise to no increase in density, which would describe an intensive property.
Answer:
If the volume stays the same, then an increase in mass will cause an increase in density.
Explanation:
However, an increase in mass along with an increase in volume can give rise to no increase in density, which would describe an intensive property
Does Cs+ or Ba2+ have a smaller radius
Which term is defined as the sum of protons and neutrons in an atom.
Answer:
Mass number
Explanation:
A catalyst will: ____________ be consumed stoichiometrically in the reaction be consumed nonstoichiometrically in the reaction not be consumed at all during a reaction depends on the reaction
A catalyst is a substance that increases the rate of a chemical reaction by lowering the activation energy required for the reaction to occur.
A catalyst itself does not participate in the reaction and is not consumed stoichiometrically or nonstoichiometrically. Instead, it speeds up the reaction by providing an alternative reaction pathway with a lower activation energy.
Therefore, a catalyst does not get consumed at all during a reaction. It can be used repeatedly in the same reaction or in different reactions, making it a cost-effective way to accelerate chemical reactions.
The use of catalysts is a common technique in many chemical processes, including the production of fuels, pharmaceuticals, and plastics.
Catalysts can also improve the efficiency and selectivity of reactions, leading to higher yields and reduced waste.
In addition, catalysts can be used to modify the properties of materials, such as their strength or durability, through catalytic reactions on their surfaces. Overall, catalysts play a crucial role in the modern chemical industry and research.
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How many moles of H₂O can be produced when 5.5 moles of CO₂ is produced? C₂H₄ + 3 O₂ --> 2 CO₂ + 2 H₂O
Answer:
5.5 mol H2O
Explanation:
Given over what you need and then mole ratio of coefficients in the balanced equation then cross multiply and do PEMDAS for that, and then you got your answer :) hope this helped.
Can compound take part in chemical reaction?
Answer:
YES!
Explanation:
What volume of 1.50 M KBr is fromed ,using 15.6 mL of concentrated KBr with a molarity of 9.65 M?
Answer:
100.4mL
Explanation:
Using the following formula:
C1V1 = C2V2
Where;
C1 = initial concentration (M)
C2 = final concentration (M)
V1 = initial volume (mL)
V2 = final volume (mL)
According to the information in this question,
C1 = 1.50M
V1 = ?
C2 = 9.65 M
V2 = 15.6 mL
Using C1V1 = C2V2
V1 = C2V2/C1
V1 = (9.65 × 15.6) ÷ 1.5
V1 = 150.54 ÷ 1.5
V1 = 100.36 mL
Approximately, V1 = 100.4mL
whoever answers first will get brainliest! this is times so pls help!
You are titrating a 125 mL sample of KOH solution; the pH meter reads 7.00 after the addition of 84.7 mL of 0.750 M HNO3.
What is the concentration of the KOH solution?
A. 0.125 M KOH
B.0.750 M KOH
C.0.508 M KOH
D. 0.0635 M KOH
thanks so much!
URGENT PLEASE HELP!!
1. It takes 5s to fill a 1L container of water from a aucet. What is the flow rate
of the faucet in litres per second and in litres per hour?
Answer:
Liters per second is 0.2 LPS
Liters per hour is 720
Explanation:
Divide the litres by the time, than multiply the time of an hour (in seconds) and than multiply the lps by time of an hour in seconds.
Answer:
the flow rate of the faucet is 720 litres per hour and 0.2 litres per second.
Explanation:
1L
---
5 s
5s is 12 drips per minute or 0.2 per seconds because 1L/5s is 0.2
To find liters per hour I calculated how many seconds are in an hour. So, one hour has 60 minutes and one minute has 60 seconds. 1 hour = (60 minutes/hour) × (60 seconds/minute) = 3600 seconds/hour.
0.2 litres per second x 3600 = 720 litres per hour
Therefore, the flow rate of the faucet is 720 litres per hour and 0.2 litres per second.
At what temperature does water reach its maximum density?.
Answer: 39 degrees farehieght
Explanation:
gooooogle
Convert 500.45 g to kg (do not use Scientific Notation)
Answer:
To convert grams to kilograms, you divide the number of grams you have by 1000. So, 800 g = 800/1000 = 0.8 kg.
Explanation:
When sugar is added to a sugar solution, the sugar does not dissolve. Which
term describes the original sugar solution?
O A. Semisaturated
O B. Supersaturated
C. Saturated
D. Unsaturated
Answer:Supersaturated
Explanation:The answer is supersaturated because supersaturation is a solution that contains more than the maximum amount of solute that is capable of being dissolved at a given temperature. It is supersaturated because there is already a sugar solution and adding another sugar is more than the maximum amount of solute.
Describe the direction of energy as endothermic or exothermic as water undergoes a phase change to steam. Justify your reasoning
As water undergoes a phase change to steam.
The first phase) Liquid water.
Final phase) Steam water.
The direction of the energy is from the surroundings to the system that contains the liquid water. We can say this is endothermic, the system needs the energy to produce the process. The flow of the energy goes from the outside to the inside.
Silicon dioxide reacts with carbon to form silicon carbide and carbon monoxide as shown in the unbalanced reaction below. Determine the percent yield of silicon carbide if 79.1 grams of carbon reacts with an excess of silicon dioxide and 67.4 g of silicon carbide is actually recovered.
SiO2 + C → SiC + CO
Please help, I'm confused and it's due very soon!
1. Draw the atomic structure of an atom of lanthanum with an atomic mass of 139 amu. Calculate the correct number of protons, neutrons, and electrons. Show the structure of the electrons within their shells.
2. Why is this rare earth metal used to store hydrogen fuel in electric-powered vehicles?
3. How can the periodic table be used to predict the reactive nature of lanthanum?
Answer:
1. Lanthanum-139 atom is the stable isotope of lanthanum with relative atomic mass 138.906348, 99.9 atom percent natural abundance and nuclear spin 7/2.
2. In fact, over 80% of electric cars sold globally utilized permanent magnet-based motors in 2019. These magnets are typically made with rare-earth materials such as neodymium and dysprosium, which have a very geographically constrained supply chain.
3. It is the second most reactive of the rare-earth metals after europium. Lanthanum oxidizes in air at room temperature to form La2O3. It slowly reacts with water and quickly dissolves in diluted acids, except hydrofluoric acid (HF) because of formation of a protective fluoride (LaF3) layer on the surface of the metal.
Explanation:
Moving to another question will save this response. Question 7 140 Ba has a half-life of 283.2 hours. How long would it take for 35 mg of 140 OA. 1452.6 hours OB. 9912.0 hours OC. 1006.9 hours D. 3.6 hours Ba in a sample to decay to 1.0 mg? TY NA
The total time required for the decay is approximately 1416.0 hours, which is closest to the given option C. 1006.9 hours.
Option (C) is correct.
To calculate the number of half-lives required for the decay. The half-life of 140 Ba is given as 283.2 hours.
First, we calculate the fraction of the original amount remaining after each half-life. Since the half-life represents the time it takes for half of the substance to decay, the fraction remaining after each half-life is 1/2.
To find the number of half-lives required to decay from 35 mg to 1.0 mg, we can set up the following equation:
(35 mg) * (1/2)ⁿ = 1.0 mg
Where 'n' is the number of half-lives.
Now, let's solve for 'n':
(1/2)ⁿ = 1.0 mg / 35 mg
(1/2)ⁿ = 0.02857
To find 'n', we can take the logarithm (base 1/2) of both sides:
n = log base 1/2 (0.02857)
Using the logarithmic property, we know that log base a (b) = log base c (b) / log base c (a):
n = log (0.02857) / log (1/2)
Using a calculator, we can find:
n ≈ 4.243
Since 'n' represents the number of half-lives, and we usually round up to the nearest whole number for half-life calculations, we get:
n ≈ 5
Therefore, it would take approximately 5 half-lives for the 35 mg sample of 140 Ba to decay to 1.0 mg.
To calculate the total time required, we multiply the half-life by the number of half-lives:
Total time = 283.2 hours * 5
Total time ≈ 1416 hours
Rounding to one decimal place, the total time required for the decay is approximately 1416.0 hours, which is closest to the given option C. 1006.9 hours.
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How many moles of mercury(II) oxide, HgO, are needed to produce 125 g of oxygen, O2? How many moles of mercury is produced?
Laughing gas (nitrous oxide, N2O) is sometimes used as an anesthetic in dentistry. It is produced when ammonium nitrate is decomposed according to the following reaction.
NH4NO3(s) ---> N2O(g) + H2O(l) How many grams of NH4NO3 are required to produce 33.0 g N2O? and How many grams of water are produced in this reaction?
Answer: 7.81 mol HgO (How many moles of mercury(II) oxide, HgO, are needed to produce 125 g of oxygen, O2?)
Explanation:
ILL GIVE YOU BRAINLIEST!!The type of biome that we live in here in Knightdale, NC is what? *
1 point
A Tundra
A Savannah
A Tropical Rainforest
A Temperate Deciduous Forest
A Temperate Rainforest
A Boreal Forest
Answer:
Temperate Deciduous Forest
Explanation:
An atom has a mass of 23 Amu and 11 protons. How many neutrons does the atom have ?
Write the subatomic particles in the order that they were discovered. Do not include commas
Answer:
This is a timeline of subatomic particle discoveries, including all particles thus far discovered which appear to be elementary (that is, indivisible) given the best available evidence. It also includes the discovery of composite particles and antiparticles that were of particular historical importance.
More specifically, the inclusion criteria are:
Elementary particles from the Standard Model of particle physics that have so far been observed. The Standard Model is the most comprehensive existing model of particle behavior. All Standard Model particles including the Higgs boson have been verified, and all other observed particles are combinations of two or more Standard Model particles.
Antiparticles which were historically important to the development of particle physics, specifically the positron and antiproton. The discovery of these particles required very different experimental methods from that of their ordinary matter counterparts, and provided evidence that all particles had antiparticles—an idea that is fundamental to quantum field theory, the modern mathematical framework for particle physics. In the case of most subsequent particle discoveries, the particle and its anti-particle were discovered essentially simultaneously.
Composite particles which were the first particle discovered containing a particular elementary constituent, or whose discovery was critical to the understanding of particle physics.