The mass of the Dinitrogen tetroxide that contains a million oxygen atoms is 23 x 10⁶ .
Atoms and molecules are very small in both size and mass. One sample mole's weight is the molar mass. To get the molar mass, connect the atomic masses (atomic weights) of each atom in the molecule. Using the mass listed in the Periodic Table or Atomic Weight Table, determine the atomic mass for each element.
To calculate the molecular mass of a molecule, multiply the subscript (number of atoms) by the atomic mass of each element in the molecule and add those masses together. Typically, molar mass is stated in either grammes (g) or kilogrammes (kg) (kg).
From the molecular formula of dinitrogen tetroxide ;
molar mass of dinitrogen tetroxide = 92 g/mol
hence;
92 g of dinitrogen tetroxide contains 4 atoms of oxygen
x g of dinitrogen tetroxide will contain 1 x 10⁶ atoms of oxygen
x = 92 x 1 x 10⁶/4
x =23 x 10⁶ atoms of oxygen.
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Complete question:
Calculate the mass of dinitrogen tetroxide (N₂O₄) that contains a million (1.000 x 10₆) oxygen atoms. Be sure your answer has a unit symbol if necessary, and round it to 4 significant digits.
A solution of 0.15M NH3 is only 1.1% ionized in solution. Calculate the pKa of NH4+. The Kb for NH3 is 1.8 x 10-5.m
The pKa of [tex]NH^{4+[/tex] would be 9.51.
pKa calculationTo solve the problem, we can use the equation for the ionization constant of a weak base, Kb:
Kb = [NH4+][OH-] / [NH3]Since NH3 is a weak base, we can assume that the concentration of OH- ions produced by water is negligible. Thus, we can simplify the equation to:
Kb = [NH4+] / [NH3]The equilibrium expression for the ionization of NH3 can be written as:
NH3 + H2O ⇌ NH4+ + OH-The equilibrium constant for this reaction is:
Kw = [NH4+][OH-] / [NH3] = 1.0 x 10^-14Since the concentration of OH- is negligible, we can assume that:
Kw = [NH4+][OH-] / [NH3] ≈ [NH4+][OH-] / [NH4+] = [OH-]Substituting Kb and Kw into the equation above, we get:
Kb x [OH-] = Kw[OH-] = Kw / Kb = 1.0 x 10^-14 / 1.8 x 10^-5 = 5.6 x 10^-10Since NH3 is only 1.1% ionized, we can assume that [NH4+] ≈ [OH-] = 5.6 x 10^-10
Using the equation for the ionization constant of NH4+, we get:
Ka = [NH3][H3O+] / [NH4+]Since NH3 is a weak base, we can assume that [H3O+] ≈ [OH-] = 5.6 x 10^-10
Substituting the values into the equation, we get:
Ka = (0.15 x 0.011)/(5.6 x 10^-10) = 3.1 x 10^-10
Finally, we can use the relationship between Ka and pKa:
pKa = -log(Ka) = -log(3.1 x 10^-10) = 9.51
Therefore, the pKa of NH4+ is 9.51.
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what percentage of a tritium sample will remain after 11 years? the half-life of tritium is 12.3 years. please answer in percent and round your answer to one place past the decimal.
After 11 years, a tritium sample will contain about 41.6% of the original amount.
How many years are there in a tritium half-life?A hydrogen isotope with a half-life of 12.3 years, tritium (also known as T or 3H) decays to 3He through beta decay.
Applying the formula for the half-life:N(t) = N₀(1/2)^(t/T)
where N(t) is the quantity still present at time t, N0 is the starting quantity, t is the time since the beginning of time, and T is the half-life.
For tritium, we have T = 12.3 years, and t = 11 years.
Substituting these values, we get:
N(11) = N₀(1/2)^(11/12.3)
We can multiply by 100 and divide N(11) by N0 to determine how much is left:
% remaining = (N(11) / N₀) * 100
% remaining = (1/2)^(11/12.3) * 100
% remaining = 41.6%
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What type of Electromagnetic energy does a T.V use?
ex: Infrared or Radio
Also how is it used in television?
Answer:
It's the type of radiation that lower frequency waves (such as visible light, microwaves, or radio waves) emit. Non-ionizing radiation is the kind that humans are typically exposed to when using electromagnetic wave-emitting technology, such as mobile phones, TVs, computers, powerlines, or microwaves.
Explanation:
hope this helps
Prussian Blue is a vibrant, blue pigment that has been used for centuries.
Prussian Blue has a molecular formula of Fe(CN)18. What is Prussian Blue's
molar mass? Show all work to receive full credit. (5 pts)
Answer:
524.21 g/mol
Explanation:
The molar mass of a compound is the sum of the atomic masses of all the atoms in its chemical formula. The molecular formula of Prussian Blue is Fe(CN)18.
The atomic mass of iron (Fe) is 55.85 g/mol. The atomic mass of carbon is 12.01 g/mol and the atomic mass of nitrogen (N) is 14.01 g/mol. So the molar mass of the CN group is 12.01 g/mol + 14.01 g/mol = 26.02 g/mol.
Since there are 18 CN groups in one molecule of Prussian Blue, the total contribution of the CN groups to the molar mass of Prussian Blue is 18 × 26.02 g/mol = 468.36 g/mol.
So the molar mass of Prussian Blue is 55.85 g/mol + 468.36 g/mol = 524.21 g/mol.
Select the coefficients necessary to balance each equation. Choose a coefficient for every compound.
1. __NH4NO3⟶ __N2O+ __H2O
2. __Fe + __HCl⟶ __FeCl3 + __H2
Answer:
Explanation:
1) 1; 1; 2
2) 2; 6; 2; 3
Answer: NH4NO3 ⟶ 2N2O + 4H2O (balanced equation)
Coefficients: 1, 2, 4
2Fe + 6HCl ⟶ 2FeCl3 + 3H2 (balanced equation)
Coefficients: 2, 6, 2, 3
Your welcome stranger. (:
Need some answers to these ASAP PLEASE
Answer: working on it
Explanation:
Answer:
a. 4 moles aluminum chloride = 8 moles chlorine (since each mole of aluminum chloride contains 2 moles of chlorine)
b. 1 mole aluminum chloride = 1 mole aluminum (since each mole of aluminum chloride contains 1 mole of aluminum)
c. It is not possible to determine the number of moles of chlorine from the given information.
i need help please i don’t understand
The poster showing the primary colors are found in the attachment.
What are primary colors?The primary colors of light are red, green, and blue. By combining these three colors in different ways, all other colors in the visible spectrum can be produced.
The primary colors of pigment are cyan, magenta, and yellow. By mixing these three pigments in different proportions, all other colors can be produced. It is important to note that the primary colors of pigment are different from the primary colors of light, which can sometimes cause confusion.
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which is the most common useful element in fertilizer?
Modern chemical fertilizers include one or more of the three elements that are most important in plant nutrition: nitrogen, phosphorus, and potassium. Of secondary importance are the elements sulfur, magnesium, and calcium.
Answer: The most common useful element in fertilizer is mostly nitrogen since it is also found in air
briefly describe the relationship between temperature and density of a gas
Answer:
Inversely proportional.
Explanation:
The density and temperature relationship for ideal gases is mathematically written as- Density and Temperature Relationship The density and temperature relation are proportionate. That is, the density is inversely proportional to temperature.
The temperature of the areas surrounding Santa Catarina before each storm was about 13°C, and there was the same amount of water vapor in the air.
Field warm cool
Given this information, which storm do you predict will have more rainfall and why?
Santa Catarina is the tropical storm having wind speed range between 30-80°C that would experience more rainfall as it has more sustained surface wind speed.
The maximum sustained surface wind speed for a tropical storm ranges from 39 to 73 mph. Due to Santa Catarina's proximity to the Atlantic Ocean, there should be an equal amount of water vapor in the air in the form of moisture in the breezes.
As a result, tropical cyclones mostly form in regions with temperatures between 5 and 30 degrees that are close to the equator. The closeness of Atlantic Ocean also causes tropical storms to form near the surface.
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Correct question is:
The temperature of the areas surrounding Santa Catarina before each storm was about 13°C, and there was the same amount of water vapor in the air. Given this information, which storm do you predict will have the most rainfall, and why?
(Refer the images for the phases of storms.)
What errors can you come across when reading a thermometer
Answer:
There are several sources of errors when reading a thermometer. Some common sources include limitations in digital processing and physical issues with the device itself, errors with the sensor which is often the greatest source of error, and measurement error which can depend on the skill of the operator. An “Err” message can also appear on a thermometer’s display if the sensor is too warm before powering on, if the temperature reading is incomplete, or if there is an internal problem with the thermometer.
Manganese- 58 had a half life of about 3 seconds. If your have a 150.0 gram sample, how long would you expect it to take to decay to approximately 1.20 grams
A sample of oxygen, O 2 , occupies 32. 2 mL at 30 °C and 452 torr. What volume will it occupy at –70 °C and the same pressure?
Answer:
21.58 mL
Explanation:
this is Charles' law
V1/T1 = V2/T2
Temperature must be in Kelvin
V2= V1 X T2 / T1
32.2 x203.15 / 303.15
dont need pressure since its the same.
How many Magnesium atoms in the formula 3Mg(O3H2)3
The formula 3Mg(O3H2)3 denotes a molecule made up of three magnesium atoms and nine groups of hydroxide ions (O3H2), each of which contains three oxygen atoms and six hydrogen atoms.
What exactly is a molecule?
A molecule is a collection of two or even more than two atoms that are held together by chemical-bonds. These atoms could be of the same element or of different elements. H2O (water), for example, is a molecule composed of two (2) hydrogen atoms and one oxygen atom.
CO2 (Carbon dioxide) is just another example of the molecule made up of 1-carbon atom and 2-oxygen atoms. Molecules are the basic building blocks of many substances, and their unique arrangement and properties play an important role in a wide range of chemical reactions and biological processes.
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In different types of solutions, solvents must be liquids.
-True.
-False
[tex] \mathbb{ANSWER:}[/tex]
FalseSolvents can also be solid and gas not only liquid.
If a balloon is taken outside on a very cold day, what will occur?
A. The volume of the balloon will decrease. B. Gas will flow into the balloon. C. The volume of the balloon will increase. D. The pressure inside the balloon will increase. **
Answer:
A the volume of the ballon will decrease
Explanation:
This is because the temperature decreased so the particles slowed down and need less room or volume to move around and collide in
1)To conduct electricity, a solution must contain.
*nonpolar molecules.
*polar molecules.
*ions
*free electrons
2)The particles in............ can be separated from heterogeneous mixtures by passing the mixture through a filter.
*suspension
*solution
*colloid
*pure substance
3)match
1.solutions
2.colloids
3.suspensions
-larger than 1000 nm
-1 nm to 1000 nm
-smaller than 1 nm
Explanation:
1 sodium must contain free eelctron cuz electricity is created due to flow of electron
2 suspension
1. To conduct electricity, a solution must contain ions and free electrons.
2. The particles in a suspension can be separated from heterogeneous mixtures by passing the mixture through a filter.
3. Solutions - Smaller than 1 nm
Colloids - 1 nm to 1000 nm
Suspensions - Larger than 1000 nm
In a solution, ions can be present when an ionic compound dissolves and dissociates into its constituent ions. These ions can move freely within the solution, allowing for the conduction of electricity.
Free electrons are not bound to any specific atom and are able to move through the material, facilitating the flow of electric current.
A suspension is a heterogeneous mixture in which solid particles are dispersed in a liquid or gas medium.
Solutions contain particles that are smaller than 1 nanometer (nm) in size. Colloids consist of particles that range in size from 1 nm to 1000 nm. Suspensions contain particles that are larger than 1000 nm in size.
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as dr. jillian swift's research has shown, chemical isotope analysis is particularly useful for considering ancient diets. why is this?
chemical isotope analysis is particularly useful for considering ancient diets because it provides information that cannot be obtained from other sources.
Chemical isotope analysis is particularly useful for considering ancient diets because it can reveal the types of foods that were consumed by ancient people. This type of analysis is based on the fact that different isotopes of elements such as carbon, nitrogen, and oxygen are found in different types of foods.
For example, the isotopes of carbon found in wheat and barley are different from those found in meat and dairy products. By analyzing the isotopes of carbon, nitrogen, and oxygen in the bones and teeth of ancient people, researchers can determine what types of foods were consumed by these people.
This information can help researchers to understand how ancient people lived, what types of foods they ate, and how their diets may have affected their health and well-being. It can also provide insight into how food production and consumption patterns have changed over time.
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Select the structure that corresponds
to the name:
3,5,6-trichloro-2-heptanol
Answer:
cholorobutanol good luck ;)B-)
1.30 grams of H₂ are reacted with an excess of N₂ to produce 4.21 grams of NH3-
3H₂ + N2 → 2NH3
What was the percent yield for ammonia in this reaction?
A-27.40%
B-28.80%
C-57.50%
D-62.60%
based on the six given solvents, which of the following answers lists all of the solvents that are not suitable for liquid-liquid extraction of an aqueous layer? 1. n-pentane 2. dimethyl sulfoxide 3. hexanes 4. dichloromethane 5. toluene 6. isopropanol
The solvents that are not suitable for liquid-liquid extraction of an aqueous layer are 1. n-pentane, 3. hexanes, and 6. isopropanol.
Liquid-liquid extraction (LLE) is a separation process that is commonly used in the laboratory to separate and purify a solvent-containing dissolved solute mixture. Liquid-liquid extraction may be utilized to segregate an aqueous solution containing one or more organic solutes from a complex mixture of organic solutes or to remove a neutral substance from an acidic or basic aqueous solution. The process entails dissolving a compound or compounds from one solvent into another and then separating the newly formed two-phase system.
The solvents that are not suitable for liquid-liquid extraction of an aqueous layer are as follows:
1. n-pentane 3. hexanes 6. isopropanol
The following solvents are suitable for liquid-liquid extraction of an aqueous layer:
2. dimethyl sulfoxide 4. dichloromethane 5. toluene
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How did you get the solution to change from blue to yellow?
Why do clouds form behind a cold front and ahead of a warm front?
Clouds form behind a cold front and ahead of a warm front because of the difference in temperature and moisture between the two air masses.
When a cold front, which is an area of colder air, meets a warm front, which is an area of warmer air, the colder air forces the warmer air to rise. As the warmer air rises, it cools and the moisture in the air condenses to form clouds. This process is called adiabatic cooling.
Similarly, when a warm front meets a cold front, the warmer air rises over the colder air and cools, forming clouds. However, because the warm air is less dense than the cold air, it rises more slowly and the clouds that form are typically less dense and less likely to produce precipitation.
In both cases, the difference in temperature and moisture between the two air masses leads to the formation of clouds. This is why we often see clouds forming behind a cold front and ahead of a warm front.
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A chemist titrates 190 ml of. 2412 nitrous acid solution with. 377 M KOH solution. Calculate the ph at equivalence. The pKa of nitrous acid is 3. 35
The equivalency solution has a pH of 2.624.
What is the procedure for making nitrous acid?Nitrous acid is frequently created by adding a mineral acid to aqueous sodium nitrite solutions. Typically, acidification is carried out at ice-cold temperatures, and HNO2 is consumed on-site. Nitrous acid in its free form is unstable and breaks down quickly.
In a neutralization process, weak nitrous acid (HNO2) reacts with strong basic KOH.
HNO2 + KOH → KNO2 + H2O
Then, we determine how many moles of KOH were used:
volume KOH x concentration equals moles KOH. KOH
moles KOH = 0.190 L x 0.377 mol/L
moles KOH = 0.07153 mol
Next, we calculate the initial concentration of HNO2:
concentration HNO2 = moles HNO2 / volume HNO2
concentration HNO2 = 0.07153 mol / 0.190 L
concentration HNO2 = 0.3765 M
[HNO2] = 0.5 x 0.3765 M
[HNO2] = 0.1883 M
The following equation can be used to model how nitrous acid dissociates in water:
HNO2 + H2O ⇌ H3O+ + NO2-
The following equation relates the pKa to the acid dissociation constant, Ka, for this reaction:
pKa = -log Ka
So we can find the Ka value from the given pKa:
pKa = -log Ka
3.35 = -log Ka
Ka = 10⁻³
Ka = 4.47 x 10⁻⁴
The relationship shown below is true for the concentrations of the species involved at equilibrium:
Ka = [H3O+][NO2-] / [HNO2]
Ka = [H3O+][NO2-] / [HNO2]
Ka = [H3O+] [HNO2]
Solving for [H3O+], we get:
[H3O+] = Ka / [HNO2]
[H3O+] = (4.47 x 10⁻⁴) / (0.1883 M)
[H3O+] = 0.002374 M
Finally, we can calculate the pH of the solution:
pH = -log[H3O+]
pH = -log(0.002374)
pH = 2.624
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Explain which body in our solar system has the smallest gravitational pull
Answer:
“The Moon, our natural satellite, is a body of less mass than the Earth, presenting one sixth of the gravity of our planet. … Since the Moon is about 1/49th the mass of Earth, it will have less gravity.
Explanation:
Indicate how many unpaired electrons each atom has. Drag the appropriate items to their respective bins. ResetHelp Ca Selected 0 unpaired electrons 1 unpaired electron 2 unpaired electrons 3 unpaired electrons 4 unpaired electrons 5 unpaired electrons
Here are the number of unpaired electrons for each of the given atoms:
Y: 0, Br: 1 , Ca: 0, Sn: 2, Br: 1
In order to determine the number of unpaired electrons for each of the given atoms, we need to look at the electron configuration for each atom.
Y (yttrium): Y has an electron configuration of [Kr] 4d¹⁰ 5s². This means that Y has a completely filled 4d subshell and no unpaired electrons.
Br (bromine): Br has an electron configuration of [Ar] 3d¹⁰ 4s² 4p⁵. This means that Br has seven electrons in its outermost energy level (4p⁵), and one of these electrons is unpaired.
Ca (calcium): Ca has an electron configuration of [Ar] 4s². This means that Ca has two electrons in its outermost energy level (4s²), and both of these electrons are paired.
Sn (tin): Sn has an electron configuration of [Kr] 4d¹⁰ 5s² 5p². This means that Sn has two electrons in its outermost energy level (5p²), and one of these electrons is unpaired.
Br (bromine): As above, Br has an electron configuration of [Ar] 3d¹⁰ 4s² 4p⁵. This means that Br has seven electrons in its outermost energy level (4p⁵), and one of these electrons is unpaired.
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correct form of question should be:
How many liters of NO2 are in 80.0 grams at STP?
The volume (in liters) of NO₂ present in 80.0 grams at STP is 38.98 L
How do i determine the volume of NO₂?We'll begin by obtaining the number of mole present in 80 grams of NO₂. Details below:
Mass of NO₂ = 80 gMolar mass of NO₂ = 46 g/molMole of NO₂ = ?Mole of NO₂ = mass / molar mass
Mole of NO₂ = 80 / 46
Mole of NO₂ = 1.74 moles
Finally, we shall determine the volume at STP. Details below:
Mole of NO₂ = 1.74 molesVolume of NO₂ =?1 mole of NO₂ = 22.4 L at STP
Thus,
1.74 mole of NO₂ = 1.74 × 22.4
1.74 mole of NO₂ = 38.98 L
Thus, we can conclude that the volume of NO₂ is 38.98 L
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In an apparatus for testing the conductivity of solutions:
The light bulb.............
-glows in the solution is a poor conductor.
-dim if the solution is a poor conductor.
-doesn't glow at all.
-glows as it's nonelectrolyte.
Answer:
1.glass
2.tungstan is going to expire
3.bulb is fuse
4.led
4 A 100g sample of water at 25°C is heated over a Bunsen burner until it nearly reaches boiling, at
99°C. How much heat (in joules) was applied to the beaker?
31,146.4 Joules of heat were applied to the beaker.
The amount of heat (q) required to heat a substance is given by:
q = m × c × ΔT
where:
m = mass of the substance
c = specific heat capacity of substance
ΔT = change in temperature
For water, the specific heat capacity (c) is 4.184 J/g°C.
The mass of water (m) is 100g.
The change in temperature (ΔT) is (99°C - 25°C) = 74°C.
Therefore, the amount of heat (q) required to heat the water is:
q = 100g × 4.184 J/g°C × 74°C
q = 31,146.4 J
Therefore, approximately 31,146.4 Joules of heat were applied to the beaker.
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What information is conveyed in 2H2SO4 ?
displacement reaction
please make me brainalist and keep smiling dude