The volume that the oxygen gas will occupy at 32.2mL and 30°C is 21.57mL.
How to calculate volume?The volume of a gas can be calculated using the combined gas law as follows:
P₁V₁/T₁ = P₂V₂/T₂
Where;
P₁, V₁ and T₁ = initial pressure, volume, and temperature respectivelyP₂, V₂ and T₂ = final pressure, volume and temperature respectivelyAccording to this question, a sample of oxygen gas occupies 32.2 mL at 30 °C and 452 torr.
452 × 32.2/303 = 452 × V/203
48.03 = 2.226V
V = 21.57mL
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In the reaction between CO and Fe304, the theoretical yield is calculated to be 47.2 g Fe. When a chemistry student carries out the experiment, the actual yield is 42.9 g Fe. Calculate the percentage yield. Round to the nearest whole number and record only your number answer (no % sign).
Answer: 91
Explanation:
Actual/theoretical X 100 = 42.9/47.2 X 100 = 91
Marble (calcium carbonate) reacts with hydrochloric acid solution to form calcium
chloride solution, water and carbon dioxide. What is the percent yield of carbon dioxide
if 3. 65 g of the gas is collected when 10. 0 g marble reacts?
The percent yield of carbon dioxide if the 3.65 g of the gas is collected when the 10.0 g marble reacts is react with the HCl is 83 %.
The chemical reaction is as follows :
CaCO₃ (aq) + 2HCl (aq) ----> CaCl₂ (aq) + H₂O (l) + CO₂(g)
The mass of the CaCO₃ = 10 g
The molar mass of the CaCO₃ = 100.09 g/mol
The moles of the CaCO₃ = 10 / 100.09
The moles of the CaCO₃ = 0.0999 mol
The molar ratio of the carbon dioxide and the calcium carbonate = 1 : 1
The moles of the carbon dioxide = 0.0999 mol
The mass of the carbon dioxide = moles × molar mass
The mass of the carbon dioxide = 0.0999 × 44
The mass of the carbon dioxide = 4.40 g
The percent yield = ( actual yield / theoretical yield ) × 100 %
The percent yield = ( 3.65 / 4.40 ) × 100 %
The percent yield = 83 %
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How much carbon dioxide is produced with 1000 grams of gasoline
Burning 1000 grams of gasoline results in about 2.3 kilograms (5.1 pounds) of carbon dioxide.
What is carbon dioxide?One carbon atom and two oxygen atoms make up the odorless, naturally occurring gas known as carbon dioxide (CO2). The atmosphere of Earth contains most of it, which makes up roughly 0.04 percent of the air there.
Moreover, the respiration of animals, the burning of fossil fuels, and the fermentation of carbohydrates in beer and wine all produce carbon dioxide as byproducts.
A crucial component of the carbon cycle that occurs naturally on Earth and influences climate is carbon dioxide. Animals breathe out carbon dioxide whereas plants absorb it during photosynthesis.
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Explain in term of Kinetic Molecular Theory and gas behavior, why the real gas in the syringe does not behave ideally.
Answer:
The Kinetic Molecular Theory states that gas particles are in constant motion and exert no attractive forces on each other. This means that gas particles can move around freely and have no interactions with each other. Real gases, however, have molecules that are much larger than ideal gas molecules and are subject to attractive forces. These attractive forces between molecules cause the gas particles to be attracted to each other, resulting in increased pressure, lower temperature, and lower volume than that of an ideal gas in the same situation. This means that real gases do not behave ideally, as they are not in a perfect state of random motion, and their pressure and temperature are lower than those of an ideal gas
Explanation:
2 moles of NO, was placed in an empty I dm' bottle and allowed to reach equilibrium according to the equation:
At equilibrium, 1.2 moles of N,O, dissociated. Calculate the value of the equilibrium constant for the reaction at that
temperature.
If there were tides on Jupiter; a. based only on the mass of its moon, which moon would have the greatest influence on the Jupiter tides?
Explanation:
If there were tides on Jupiter, the moon with the greatest influence on the Jupiter tides would be the moon with the greatest mass and closest distance to Jupiter.
What major type of weak interactions can asp have that are absent in chymotrypsin?
In the catalytic cycle, asp is capable of weak interactions with histidine that chymotrypsin does not have.
Throughout the catalytic cycle, Asp-102 maintains its negative charge. It establishes a salt bond with the protonated form of His-57 but not the deprotonated form, stabilizing the protonated form and boosting the histidine's affinity for protons.
The histidine residue interacts with aspartate and is oriented correctly as a result. Following that, histidine and serine's alcohol group may interact. Histidine changes serine from a weak nucleophile (alcohol) into a strong nucleophile by removing the hydrogen ion from the alcohol (alkoxide).
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Grade 12 organic chemistry
How would you name this?
One of the subfields of chemistry called "organic chemistry" examines the composition, production, reactivity, and structure of molecules containing carbon.
Does 'organic' imply 'healthy'?A item is not necessarily healthful regardless of whether it claims to be organic or contains fresh products. Certain organic food could nevertheless be heavy in calories, fat, salt, or sugar. With running water, thoroughly clean and wash fresh fruits and vegetables.
Is eating organic worth the price?Organic foods encourage an agricultural system which it avoids synthetic chemicals such as pesticides and fertilizers and encourages a more biologically diverse ecosystem, paying particular attention to the well-being of watersheds, soil, air, wildlife, agricultural labourers, and the climate. As a result, organic foods are unquestionably better for the environment.
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Which has the higher percent of aluminum, A1 2 O3 or A1(NO3)3?
Answer:
I think it is Al2O3
(28) CCC Cause and Effect Young's modulus is a measure
of a solid material's stiffness. A highly ductile
material will typically have a very low modulus. The
table shows several different metals, their crystalline
structure, and their Young's modulus. Describe the
pattern you observe and explain the connection
between structure and stiffness.
From the table, it is very clear that as the crystallinity increases, its stiffness also increasing. The FCC structures are having less crystallinity and is more ductile than BCC structure.
What is ductility of a material ?Ductility of a material is the ability to make very thin elongated wires. Whereas, stiffness of a material is the resistance to any elongation or compression.
The more crystalline the material, more will be the stiffens. The material with higher Young's modulus (Y) are more crystalline and stiff. As Y decreases, stiffness decreases, the material becomes ductile.
Because the body-centered cubic (BCC) lattice is not tightly packed despite being cubic, the face-centered cubic (FCC) crystalline structure has greater ductility than the BCC.
Due to the fact that a hexagonal close-packed (HCP) lattice is densely packed but not cubic, HCP metals are less ductile than BCC and FCC metals.
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Two methods that can analyze fibers are
a
Polarizing light spectroscopy and infrared microscopy
b
Polarizing light microscopy and infrared spectroscopy
c
None of the above
Answer:
b
Polarizing light microscopy and infrared spectroscopy
Explanation:
7.7 g of NaCl and 18.4 g of KBr were dissolved in 40 g of water. What is the mole fraction of NaCI in the solution?
The mole fraction of NaCI in the solution is 0.079 when 7.7 g of NaCl is dissolved in 40 g of water.
What is a mole?Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.
It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.
Number of moles of NaCl =7.7/40=0.1925 and number of moles of water =40/18=2.22 thus mole fraction= 0.1925/2.414=0.079.
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Answer the following questions thoroughly.
1. The atmosphere is composed of four different layers: the troposphere, the
stratosphere, the mesosphere, and the thermosphere. (12 points)
A. What are the temperatures (cold, warm, or hot) found in each layer of the
atmosphere? (8 points)
B. Where is the ozone layer and what is its function? (2 points)
C. Where is the ionosphere and what is its function? (2 points)
1) The troposphere is cool while the stratosphere, mesosphere and the thermosphere are hot.
2) The ozone layer is in the stratosphere
3) The ionosphere is in the thermosphere.
What are the layers of the atmosphere?This is the lowest layer of the atmosphere, extending from the Earth's surface up to about 7-20 kilometers (4-12 miles) depending on the location. This is where weather occurs, and it is where we live and breathe. Temperature decreases with height in the troposphere.
The thermosphere is the fourth layer of the atmosphere, extending from about 85-600 kilometers (53-373 miles) above the Earth's surface. This layer is characterized by high temperatures due to absorption of solar radiation, and it is also where the auroras occur.
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Hydrochloric acid and sodium hydroxide react as follows:
HCI + NaOH → H₂O + NaCl
Calculate the mass of NaCl formed when 40.0 grams of HCI
and 40.0 grams of NaOH react?
Molar mass of HCI = 36.5 g/mol
Molar mass of NaOH = 40.0 g/mol
Molar mass of NaCl = 58.5 g/mol
g
Your answer should be rounded to three significant figures. Do not include
units in your answer.
The mass of NaCl is 58.5 g
What is the mole?The mole is a fundamental unit of measurement used in chemistry to express the amount of a substance. One mole of a substance is defined as the amount of that substance that contains the same number of entities, such as atoms, molecules, or ions, as there are in 12 grams of carbon-12. This number is known as Avogadro's number and is approximately 6.02 x 10^23.
Number of moles of NaOH = 40 g/40 g/mol = 1 mole
Since the reaction is 1:1
Mass of NaCl formed = 1 moles * 58.5 g/mol = 58.5 g
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Which condition most likely keeps mangrove trees from growing in deserts? Responses The ground is too dry. The ground is too dry. The winds are too strong. The winds are too strong. The air gets too cold at night. The air gets too cold at night. There is too much light during the day.
The fact that the earth is too dry is what most likely prevents mangrove trees from growing in deserts.
What kind of habitat is ideal for mangrove growth?All of these trees flourish in low-oxygen soil regions with slowly flowing rivers that permit the accumulation of fine sediments. Because mangrove trees cannot withstand subfreezing conditions, they can only be found close to the equator in tropical and subtropical latitudes.
What circumstances lead to the development of mangrove forests?Mangroves are only found close to protected beaches in tropical or subtropical ltiatudes since they are unable to withstand subfreezing temperatures. They all possess the unique capacity to thrive in salted soil that is within the range of the tides.
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If 5.00 g of sodium chloride is dissolved in 20.0 mL of solution at room temperature, is the solution saturated,supersaturated, or unsaturated? (The molarity of a saturated NaCl solution at room temperature is 5.98 M.)
Answer:
First, we need to calculate the molarity of the solution:
Molarity = moles of solute / liters of solution
We know the mass of solute (5.00 g) and the volume of solution (20.0 mL = 0.0200 L). To find the moles of solute, we need to divide the mass by the molar mass of NaCl:
moles of NaCl = 5.00 g / 58.44 g/mol = 0.0855 mol
Now we can calculate the molarity:
Molarity = 0.0855 mol / 0.0200 L = 4.28 M
The molarity of the solution is less than the molarity of a saturated NaCl solution at room temperature (5.98 M), so the solution is unsaturated.
If the Antarctic plate is estimated to move 2. 05 cm per year, how long did it take for the plate to move from point A to point B?
Answer:
They move at a rate of one to two inches (three to five centimeters) per year.
Explanation:
The movement of the plates creates three types of tectonic boundaries: convergent, where plates move into one another; divergent, where plates move apart; and transform, where plates move sideways in relation to each other.
can somebody help me out with this its chemicals pls help asap im gonna fail if i dont finish them
The chemicals shown represent molecules of compounds that are formed from the reaction between molecules and atoms of elements.
What are chemical compounds?Chemical compounds are substances composed of two or more different elements that are chemically bonded together in a fixed ratio.
Chemical compounds can be classified into various categories, such as organic compounds (which contain carbon), inorganic compounds (which do not contain carbon), and biochemical compounds (which are involved in biological processes).
Examples of chemical compounds are NaCl, MgO, etc.
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label any polar bonds on the indigo dye bond and identify the 2 central atoms with different geometry and identify it
The N - H and the C- O and the C- N bonds in indigo dye are polar on nature.
What are the polar bonds in indigo dye?Indigo is a blue dye that is derived from the leaves of certain plants. The chemical structure of indigo consists of two benzene rings connected by a nitrogen atom. The molecule has several polar bonds due to the electronegativity differences between the atoms.
The polar bonds in indigo include:
The nitrogen-carbon bonds: The nitrogen atom in the middle of the molecule is connected to two carbon atoms, one in each benzene ring. Nitrogen is more electronegative than carbon, so the nitrogen-carbon bonds are polar.
The carbon-oxygen bonds: Indigo has two oxygen atoms that are double bonded to carbon atoms in the benzene rings. Oxygen is more electronegative than carbon, so the carbon-oxygen bonds are also polar.
The carbon-nitrogen bond: The nitrogen atom in the middle of the molecule is also connected to a carbon atom in one of the benzene rings. This bond is polar due to the electronegativity difference between carbon and nitrogen.
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Skeleton equation for lithium bromide produces lithiùm and bromine when heated
Lithium and bromine are created when lithium bromide is heated, according to the following skeleton equation: [tex]Li(s) + Br2 = LiBr(s) (g).[/tex]
A skeleton equation is a condensed description of a chemical reaction that only displays the reactants and products—not their quantities or the circumstances under which the reaction takes place—of the process. It is a simple description of the reaction that can be used to pinpoint the components involved and the reaction's overall nature. A skeleton equation, however, does not fully describe the reaction because it does not account for the quantity of atoms or the charges of the ions involved. It is required to balance the equation, take into account the state and charge of each ion, as well as the reaction conditions, in order to completely comprehend the reaction.
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The NH3 synthesis i Haber's process is an exothermic reaction it should be favoured at low temperature but optimum temperature is 400 degree Why?
The Haber process is a complex industrial process, and several factors must be taken into consideration when determining the optimum temperature.
What is Harber process?
Ammonia (NH3) is created chemically by the Haber process from nitrogen gas (N2) and hydrogen gas (H2). The technique was created in the early 20th century by a German chemist by the name of Fritz Haber, hence the name.
With the aid of a catalyst, usually iron, the Haber process involves the reaction of nitrogen gas and hydrogen gas at high pressure and high temperature. The reaction's chemical equation is as follows:
N2 + 3H2 ⇌ 2NH3
In the Haber process, the creation of ammonia (NH3) is an exothermic reaction. Le Chatelier's principle states that an exothermic reaction is more advantageous at lower temperatures. In order to maximise the ammonia yield, one might therefore infer that the Haber process should be carried out at low temperatures.
But because the Haber process is a sophisticated industrial procedure, choosing the ideal temperature requires careful thought of a number of variables. While a low temperature may promote the forward reaction, it may also cause the reaction to proceed more slowly, resulting in less ammonia being produced. The pressure and concentration of the reactants also have an impact on reaction rate.
The Haber process has been successfully used at temperatures between 400 and 450°C, based on the catalyst employed. Due to the low temperature favouring the forward reaction, the reaction rate is high enough at this temperature to achieve an acceptable ammonia production rate while also allowing for a good yield of ammonia. Moreover, the inclusion of a catalyst (often iron) can speed up the reaction even more and boost ammonia output.
In conclusion, even if the forward reaction in the Haber process may be favoured by a low temperature, this does not mean that this temperature is the best one because other variables that affect the reaction rate and production rate may also be at play. By testing, it has been discovered that a catalyst and a temperature of roughly 400–450°C offer the greatest ammonia yield and reaction rate balance.
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if 45.8 L of hydrogen gas is produced in this reaction at STP, how many moles of sulfuric acid were reacted
One H2SO4 molecule has a 98 Atomic Weight Unit atomic mass. H2SO4 has an atomic mass of 98 grams per mole. One mole of H2SO4 is therefore present in 98 grams of H2SO4.
In chemistry, how is H2SO4 referred to?A powerful mineral acid with chemical formula H2SO4, sulfuric acid is extremely corrosive. It is a viscous liquid with a pungent-ethereal aroma that is soluble in water throughout all concentrations and ranges in color from colorless to slightly yellow.
Is H2SO4 an effective basic or acid?An extremely potent acid is sulfuric acid (H2SO4). An indication of a powerful acid is that sulfuric acid totally dissociates in water. Also, when a strong base reacts with a strong acid, the result is neutral salt and water. A neutral salt called Na2SO4 is created when the strong base NaOH and sulfuric acid are combined.
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14.87 moles of Magnesium should form 14.87 moles of Magnesium Chloride. 14.77 moles of Hydrochloric acid should form 7.97 moles of Magnesium Chloride. Only 1.78 moles of Magnesium chloride is obtained. What is the percent yield?
PLEASE HELP and teach please
According the question the Percent yield is 11.99%
What is yield?Yield is an economic term referring to the income generated by an investment over a period of time. It is usually expressed as a percentage of the initial investment and is calculated by taking the total income earned and dividing it by the initial investment. Yield is an important measure of the performance of an investment, and is a key factor in determining the attractiveness of an investment. Yields can be calculated for individual investments, or for portfolios of investments. Yields can also be calculated for different types of investments, such as stocks, bonds, and mutual funds. Yields are also used to compare investments with different levels of risk, so investors can make informed decisions about their investments. Yields are affected by a variety of factors, including interest rates, inflation, and market conditions.
The percent yield can be calculated using the formula:
Percent yield = (Actual yield / Theoretical yield) * 100
For Magnesium Chloride, the theoretical yield is 14.87 moles, and the actual yield is 1.78 moles.
Therefore, the percent yield is:
Percent yield = (1.78 / 14.87) * 100 = 11.99%
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When the same amount of force is applied to a smaller area, how is pressure affected?
Answer:
The pressure is reduced since the area needed to be exerted on by pressure has also been reduced
what reaction is ab+c?ac+b
Simple interchange or replacement reactions, sometimes known as single displacement reactions, include the reaction ab + c ac + b.
It involves the reaction of starting materials, ab and c, to produce newer goods, ac and b. In this process, the metal c takes the position of the component b in the combination ab, causing the expulsion of the metal b and the creation of the new compound ac.
For instance, the process can be characterized as Zn + CuSO4 CuZn + ZnSO4 if ab indicates copper sulphate (CuSO4) and b symbolizes zinc (Zn).
Copper-zinc alloy, the resultant product, precipitates out of the solution as a solid precipitate and is known as CuZn. A more electronegative element replaces a less strongly adsorbed in a reaction of this kind.
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Description of Entry for soil
Soil is a mixture of organic and inorganic materials that forms the uppermost layer of the Earth's crust. It is a complex, three-dimensional matrix of mineral particles, organic matter, water, air, and living organisms. Soil provides critical habitat for various microorganisms, insects, plants, and animals, making it a key component of terrestrial ecosystems.
How is soil formed?Soil is formed through weathering, which breaks down rocks and other materials into smaller particles. Various factors, including temperature, moisture, wind, and the activities of living organisms, influence this process. Over time, layers of organic matter accumulate on the soil's surface, creating a rich environment for plant growth.
What is the function of soil?Soil has several important functions, including supporting plant growth, regulating water flow, and cycling nutrients. It also plays a key role in carbon sequestration, helping mitigate climate change's impacts by storing carbon in the form of organic matter.
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Please help!
How many protons, neutrons,
and electrons are in this ion?
27
13 Al+3
A. 13 pt, 27 nº, 13 e-
B. 27 pt, 13 nº, 10 e-
C. 13 pt, 14 n°, 13 e-
D. 13 pt, 14 nº, 10 e-
No. of protons, neutrons, and electrons in this ion are 13, 14 and 13 respectively.
What are subatomic particles?
These particles make up atoms, and are often referred to as subatomic particles. There are three subatomic particles: protons, neutrons and electrons. Two of the subatomic particles have electrical charges: protons have a positive charge while electrons have a negative charge.
A = Mass number = no. of protons + no. of neutrons
Z = Atomic number = no. of electrons = no. of protons
Given, Al³⁺ ion that has A = 27 and Z = 13
Z = no. of electrons = no. of protons = 13
A - no. of protons = no. of neutrons = 14
Therefore, no. of protons, neutrons, and electrons in this ion are 13, 14 and 13 respectively.
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I NEED HELP ON THIS ASAP!!!
Write a one paragraph summary about atomic model(s). Be sure to describe the process one must go through to create a model. Also, briefly explain the mathematical data needed to create an accurate model.
Explanation:
The atomic model is a scientific theory that describes the structure and behavior of atoms. In the early 20th century, scientists began to develop new models of the atom as they discovered more about its properties. One of the earliest models was proposed by J.J. Thomson in 1897, which suggested that the atom was a sphere of positive charge with negatively charged electrons embedded within it. This model was later replaced by the Rutherford model in 1911, which showed that the atom had a small, dense nucleus surrounded by orbiting electrons. The modern quantum mechanical model of the atom, which is widely accepted today, uses complex mathematical equations to describe the behavior of electrons within atoms. To create an accurate model, scientists must use experimental data, such as the energy levels of electrons, the wavelengths of light emitted by atoms, and the positions of spectral lines, to calculate the probabilities of where electrons are likely to be found within the atom. The resulting model allows scientists to make predictions about how atoms will behave under different conditions, and it has many practical applications in fields such as chemistry, physics, and engineering.
Answer:
Atomic models are representations of the structure of an atom. They are important tools in understanding the behavior of atoms and their interactions with other atoms. In creating an atomic model, scientists must first gather and analyze experimental data to determine the properties and behavior of the atoms. They then use mathematical equations and theories, such as quantum mechanics, to develop a model that accurately represents the observed behavior of the atoms. The model must take into account the position and movement of the electrons around the nucleus, as well as the various energy levels of the electrons. By studying atomic models, scientists have been able to make important discoveries about the nature of matter and the fundamental forces that govern the behavior of atoms.
Explanation:
What theory explains the behavior of gases
Answer: The Kinetic Molecular Theory (KMT)
Explanation:
If 6. 5 moles of nitrogen gas react with 17. 8 moles of hydrogen gas, according to the following reaction, what mass of ammonia would be produced
If 6. 5 moles of nitrogen gas react with 17. 8 moles of hydrogen gas, mass of ammonia that would be produced is 34g.
In the reaction N2 + 3H2 → 2NH3, 6.5 moles of nitrogen gas and 17.8 moles of hydrogen gas will react to produce 2 moles of ammonia. To calculate the mass of ammonia produced, we can use the formula:
Mass = moles x molar mass
So, in this case, the mass of ammonia produced would be:
Mass = 2 moles x 17 g/mol = 34 g
The mass of one mole of a material, given in grams per mole (g/mol), is known as molar mass. It is computed by multiplying the atomic masses of all the atoms in a molecule or formula unit.
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