Answer:
An out wash plain
Explanation:
"Well if glaciers were to most likley melt wit would have a big affect on the world. But on Florida the affect would be as everybody would expect, a flash flood, with high water's and everything under water. AND there would most lilkley be something in the glacier. Not highly sure about it though"
Answer: A. coastal flooding. If Earth's glaciers were to melt, it would cause sea levels to rise, which would lead to coastal flooding in Florida and other low-lying coastal areas.
The improvement of energy efficiency in the United States is important. Which scenario is least
likely to occur due to improved energy efficiency in the United States?
O Allow more time to improve use of renewable resources.
O Increase environmental problems.
Make nonrenewable resources last longer.
Reduce dependence on other countries.
Answer:
increase environmental problems
what part of an atom exists in orbitals surrounding the nucleus?
electron part of an atom exists in orbitals surrounding the nucleus.
The orbitals or shells that enclose an atom's nucleus are home to electrons. In the nucleus, protons and neutrons are present. In the atom's nucleus, they coalesce. An atom's nucleus is surrounded by electrons in distinct orbits. At whatever distance from the nucleus, electrons cannot just exist. The levels of these orbits are numbered 1, 2, 3, and so forth, with level 1 being the orbit closest to the nucleus. Take a look at the illustration on the right. Two electrons are contained in each orbital, and each has a unique spin. An atom's orbital is a pocket of space where an electron belonging to a certain subshell can be found.
What part of an atom exists in orbitals surrounding the nucleus?
A. electron
B. photon
C. neutron
D. proton
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An unknown Liquid was weighed in a pycnometer with a volume of 1.39 ml. The mass of the liquid was 0.963 g. What was the density of the liquid.
Answer:your mom
Explanation: your mom is the density
Some alloys date back to very early ages. Bronze was the first alloy used dating back to prehistoric times (4500 B.C.) What makes up a bronze alloy? Why do you think the first man experimented with making bronze, and what benefits do you Alloys think bronze provide early man?
Bronze is an alloy composed primarily of copper and tin.
Why do you think the first man experimented with making bronze?It is believed that early man began experimenting with making bronze because the combination of these two metals produced a material that was harder and stronger than either of the individual metals.
This allowed early man to make better tools, weapons, and other items that were essential for survival.
The discovery and use of bronze represented a major step forward in human technological development and helped to shape the course of human history.
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1.) Uranium is breaking down at a half-life rate of 10 minutes. It begins this decay at a mass of 48g and it takes 78 minutes to complete. How much Uranium is left after decay?
2.) Ra-226 has a half-life of 1,600 years. 14.0g of it takes 300 years to decay. What quantity is left after 300 yr?
3.) The half-life of Po-218 is 3 minutes. After 15 minutes Po-218 is finished decaying and there is only 0.625g left. How much Po-218 did you start with?
4.) A 32g sample of Curium-247 will break down in 6 half lives to make 0.5g of it. It has a half-life of 1.5 million years. How long does this take? Slide 13.
Show all Work and solve by using this Forumla:
N(t) = No(1/2) t/ t 1/2
Calculate for H to find the amount of half-lives before solving for N values.
The half life of uranium is 10 minutes. Then, the 48 g of uranium sample will decay to 0.21 g after 78 minutes.
What is radioactive decay ?Heavy unstable radioactive isotopes undergo nuclear decay by the emission of charged particles. The nuclear decay is a first order reaction.
thus, decay constant k = 1/t ln W0/Wt.
The half life time of the sample = 10 minute.
decay constant = 0.693/ t1/2
k = 0.693/10 = 0.069 min⁻¹
then,W0 = 48 g
we have to find the amount Wt.
time of decay t = 78 min
ln 48 g/Wt = 0.069 min⁻¹ × 78 min
Wt = 0.12 g.
Therefore, the mass of uranium sample left after the decay will be 0.12 g.
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if a burst of light described above had a total energy of 4.50 kj, how many moles of electrons can be released
If a burst of light had a total energy of 4.50 kJ, it can release 0.0468 moles of electrons.
This number is calculated by dividing the total energy by the energy per mole of electrons, which is equal to the Faraday constant (96,485 C/mol). In this case, the answer is approximately 0.0468 moles of electrons.
The Faraday constant is a measure of the amount of electrical charge that is released when one mole of electrons is passed through an electrical circuit.
This constant is important because it allows us to calculate how many moles of electrons can be released when a certain amount of energy is present.
By dividing the total energy of 4.50 kJ by the Faraday constant, we can determine the number of moles of electrons that can be released.
Although a part of your question is missing, you might be referring to this question:
A burst of light is being emitted through a photon.
If a burst of light described above had a total energy of 4.50 kj, how many moles of electrons can be released?
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which purpose is most used for tlc method?
a. Identification
b. Makes the eluent more polar
c. neutral or acid
d. slightly sour
Makes the eluent more polar is the correct option.this is the purpose which is most used for TLC method.TLC means thin-layer chromatography.
Non-volatile mixtures can be separated using the chromatography technique known as thin-layer chromatography (TLC). A sheet of an inert substrate, such as glass, plastic, or aluminum foil, is used for thin-layer chromatography. This substrate is covered with a thin layer of an adsorbent material, often silica gel, aluminum oxide (alumina), or cellulose. To elute more strongly retained solutes, an increase in eluent strength is necessary. RP-HPLC (raise organic, create more non-polar) (increase organic, make more non-polar). NP-HPLC (increase solvent to make more polar) (increase solvent to make more polar) For many separations, eluent strength gradients (gradual changes) are utilized. When polar compounds are induced to be more attracted to the mobile phase by a moderately polar eluent, the equilibrium shifts and the compound spends more time in the mobile phase, increasing the R f.
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a cell undergoing aerobic metabolism is fed with glucose labeled with 14c. assuming this is the sole source of carbon for the tca cycle, what percentage of co2 produced by the cell would be labeled with 14c after two turns of the tca cycle? assume that the cycle is primed with unlabeled oxaloacetate
The TCA cycle, also known as the Krebs cycle or citric acid cycle, is a series of chemical reactions that occurs in the mitochondria of cells.
It is a key component of aerobic metabolism, as it generates energy in the form of ATP from the breakdown of glucose and other fuels.
When glucose labeled with 14C is fed to a cell undergoing aerobic metabolism and becomes the sole source of carbon for the TCA cycle, the cycle will incorporate the 14C label into the molecules produced during the cycle.
The TCA cycle involves a series of 8 reactions, in which one molecule of acetyl-CoA enters the cycle, and is converted into 2 molecules of CO2.
Each turn of the TCA cycle will convert 1 molecule of acetyl-CoA into 2 molecules of CO2.
When glucose labeled with 14C is the sole source of carbon for the TCA cycle, 100% of the acetyl-CoA produced from the glucose will be labeled with 14C.
So after the first turn of the TCA cycle, 100% of the 2 molecules of CO2 produced will also be labeled with 14C.
In the second turn of the TCA cycle, one of the two CO2 molecules produced in the first turn will be used to regenerate the unlabeled oxaloacetate.
The other CO2 molecule produced in the first turn will be used to form another molecule of acetyl-CoA, which will again enter the TCA cycle and produce two new molecules of CO2.
So after two turns of the TCA cycle, 50% of the CO2 produced will be labeled with 14C.
This is because one of the two CO2 molecules produced in the first turn will be used to regenerate the unlabeled oxaloacetate, and the other will enter the TCA cycle again.
It's important to note that this is a simplified version of the TCA cycle, in reality, different cells have different levels of metabolic flux and different mechanisms that might contribute to the dilution of the labeled molecules.
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A Biologist Wants To Flash Freeze Several Samples That She Has Collected From Her ..
How could you tell the following three white artificial sweetener powders apart using flame tests? You have: Equal® (C14H]gN2O5, a non-ionic compound that doesn't produce a metal ion), Ace-K (KC;H. NO. S), and Sweet 'N Low (Ca(CH4NO:S)2)
Any substance that is burned in a flame emits a distinctive hue. Knowing the sort of cation present in the compound will allow us to forecast the color of the flame.
Based on the results of the flame test, the provided sweeteners can be separated from one another.
• Equal, an artificial sweetener, is made of a non-ionic molecule (C14H18N2O5). It has no cations at all. It won't exhibit any color in the flame test as a result.
Ace-K sweetener contains the K+ ion as its cation. Ace-K emits a lilac-colored flame as a result of the K+ ion's existence.
• The cation in Sweet 'N Low is the Ca2+ ion. Sweet 'N Low produces a flame that is brick-red in color due to the presence of Ca2+ ions.
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how do the attractive and repulsive forces between two atoms compare when the atoms form a covalent bond?
In a covalent bond between two atoms, the repulsive forces between the two positive nuclei gets cancelled out as the attractive forces between the positive nuclei and the negative electrons is more.
A covalent bond is said to be a bond formed between two atoms by the sharing of equal number of electrons present in both the atoms.
In a covalent bond, the dense electron cloud is concentrated in between the two nuclei of the atoms.
The attractive forces balance out the repulsive forces. So, If any net force is left, the atoms will still accelerate. Therefore, the forces that will pull the two atoms together must be equal to the forces that will push them apart.
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particle derives its name from the fact that it has no electrical charge; it is neutral and found in the nucleus of an atom
Name the sub-atomic particles present in an atom.
A. Electrons
B. Protons
C. Neutrons
D. Molecules
A. Electrons, B. Protons, and C. Neutrons are the sub-atomic particles found in an atom. Electrons are subatomic particles with a negative charge that revolve around an atom's nucleus. The atom's nucleus contains positively charged protons, which are particles. Neutrons, neutral particles, are also present in the atom's nucleus.
Molecules are not sub-atomic particles, but rather a group of atoms that are chemically bonded together. Electrons determine the chemical properties of an element; protons determine the atomic number and neutrons add mass to the atom.
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2. A. If 34. 5 g of Copper reacts with 70. 2 g of silver nitrate, according to the following reaction, what is the maximum number of grams of silver that can be produced? B. How much excess reactant will remain?
44.59844.6 g of silver metal will be deposited when the reaction is fully completed.
Weight of Ag metal contained in 70.2 g of AgNO3 = 108/170 x 70.2 = 44.598 g Equivalent mass of Copper = 63.54/2= 31.77 g Equivalent mass of Silver(Ag)= 108/1
[From the aforementioned information, we learn that AgNO3 is the LIMITING AGENT]
As a result, 44.59844.6 g of silver metal will be deposited when the reaction is fully completed.
[Note: When one equivalent mass of copper, or 31.77 g, dissolves in the solution, one equivalent mass of silver, or 108 g, is deposited at the cathode.
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Given the chemical equation: C2H4 + O2 CO2 + H2O Balance the chemical equation. Explain how the balanced chemical equation agrees with the law of conservation of mass.
Answer: C2H4 + 3O2 2CO2 + 2H2O
Explanation: Since the exact same amount of atoms is on both sides, no mass or matter is lost which agrees with the law of conservation of mass. This law states that The law of conservation of mass is that, in a closed or isolated system, matter cannot be created or destroyed. It can change forms but is conserved.
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f zinc replaces iron, iron replaces lead, and zinc replaces lead in a chemical reactions, the order of activity from most active to least active is
The order of activity from most active to least active in the given scenario is: zinc, iron, lead. This is because zinc is the most active element in the group, as it has the least number of valence electrons.
making it more likely to participate in chemical reactions and replace other elements. Iron is the next most active, as it has a higher number of valence electrons than zinc, but still fewer than lead, which is the least active element in the group due to its high number of valence electrons, making it less likely to participate in chemical reactions and replace other elements.A chemical element with the atomic number 30 and the symbol Zn is zinc (Zn). It belongs to the periodic table's group 12 and is a transition metal. A bluish-white, glossy metal with high conductivity for electricity, zinc is a substance. It reacts with oxygen and water to produce zinc oxide (ZnO) and zinc hydroxide (Zn(OH)2) due to its comparatively high reactivity. Brass manufacture, galvanizing (coating steel or iron to prevent corrosion), and alloying other metals all utilize it often.
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What do you think method is faster classical or instrumental?
Answer:
Instrumental Methods.
Explanation:
Compared to simple laboratory tests, instrumental methods of analysis may give improved: speed (they are quick) accuracy (they reliably identify elements and compounds) sensitivity (they can detect very small amounts of a substance in a small amount of sample)
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In an Experiment a fuel raied the temperature of 500g of water by 4 degree C.
a) work out the energy releaed in the experiment.( It take 4.2J of energy to raie the temperature of 1g of water by 1 degree C)
By dividing the energy required to increase the temperature of 1 gramme of water by 1 degree Celsius (4.2 J) by the weight of the water in theexperiment (500 g) and the number of degrees raised, the energy released during the experiment can be estimated (4 degrees).
The capacity to perform labour is energy. Kinetic energy (energy in motion), potential energy (energy stored), thermal energy (heat), electrical energy, and chemical energy are only a few of its numerous variations. These energy sources can be changed into one another. Coal, for instance, is a type of chemical energy that can be transformed into thermal energy to produce electricity. Solar panels transform solar energy into electrical energy. Although fossil fuels like coal, oil, and natural gas are still the most widely utilised types of energy today, renewable energy sources including wind, solar, hydropower, and geothermal energy are gaining importance. Because they don't release greenhouse gases or deplete scarce resources, the utilisation of renewable energy sources is crucial.
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explain why the melting and boiling points of covalent compounds are usually lower than those of ionic compounds.
Covalent compounds are composed of molecules that are held together by the sharing of electrons, while ionic compounds are held together by electrostatic forces between positively and negatively charged ions due to which the melting and boiling points of covalent compounds are usually lower than those of ionic compounds.
Because covalent bonds involve the sharing of electrons, the molecules in covalent compounds are held together more loosely than those in ionic compounds.
This looser bonding structure causes the melting and boiling points of covalent compounds to usually be lower than those of ionic compounds.
The lower melting and boiling points can be attributed to the weaker bonds between the molecules in covalent compounds, which require less energy to break and reform.
Covalent compounds are composed of molecules, which are formed by atoms sharing electrons. This sharing of electrons creates strong bonds between the atoms, making the molecules less stable than the ions in ionic compounds.
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What is the density of an object that will float in water?
Answer:
less than 1g/cm3
What is the mass of O2 needed when 8.75 * 10^70 molecules of CH4 combust to form CO2?
As a result, when you enter your pertinent values, you get:E = -891 * 1.65 E = -1470.15 kJ.
What is the mass ?The following results are obtained after entering the data into the formula:
((2*-238) + -394)
- [-75 + (2*0)]
H(reaction)=-891 kJ/mol
Now you need to find the kJ value for 1.65 mol.
You use the following standard formula:
Where E is energy expressed in kJ, E is equal to (reaction) * mol.
As a result, when you enter your pertinent values, you get:
E = -891 * 1.65 E = -1470.15 kJ
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suppose that you add 25.6 g of an unknown molecular compound to 0.250 kg of benzene, which has a k f of 5.12 oc/m. with the added solute, you find that there is a freezing point depression of 3.54 oc compared to pure benzene. what is the molar mass (in g/mol) of the unknown compound?
If we add 25.6 g of an unknown molecular compound to the 0.250 kg of benzene, the molar mass of the unknown compound is 148.8 g/mol.
The Molality of the compound is given as :
ΔT = i Kf m
Where,
ΔT = freezing point depression = 3.54 °C
i = Van't Hoff factor of the Benzene = 1
Kf = constant of the freezing = 5.12 °C/m
m = molality = ?
m = ΔT / i Kf
m = 3.54 / 1 × 5.12
m = 0.69 mol
molality = moles / mass of benzene
moles = 0.172
The molar mass = mass / moles
The molar mass = 25.6 / 0.172
The molar mass = 148.8 g/mol
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What are some factors that affect the design of concert halls and movie theaters
Some factors that affect the design of concert halls and movie theaters are:
1. Acoustic characteristics: Acoustic characteristics, such as sound reflection, reverberation, and sound absorption, must be considered in the design of music halls and movie theaters. This is essential to guaranteeing the best possible audio clarity and quality, both for live performances and recorded audio.
2. Seating capacity: The number of seats in a theater or concert hall has a significant impact on the space's overall design. The audience's viewing and listening experiences will be impacted by the seating arrangement and the number of rows.
3. Lighting: The design of the lighting in concert halls and movie theaters is crucial since it can change the environment's ambience. Different moods and effects can be produced by specialized lighting systems, such as spotlights for live performances or low lighting for movies.
4. Sound and projection equipment: The positioning and functionality of sound and projection equipment, such as speakers, amplifiers, and projectors, must be considered when designing concert halls and movie theaters. For the best possible sound and image quality, this is crucial.
5. Accessibility: Many concert halls and movie theaters are designed with accessibility in mind, such as ramps, elevators, and accessible seating for people with disabilities. This is important to ensure that all members of the community have the opportunity to enjoy live performances and films.
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determine the air/soil partition coefficient for benzene, trichloroethylene (tce) and benzo(a)pyrene [b(a)p] for a soil consisting of 0.5 volume fraction solids, 0.35 volume fraction of air, and 0.15 volume fraction of water. this soil is known to contain 3% (by weight) of natural soil organic carbon (this is already included in the above solids volume fraction).
For a soil that contains 0.5 solids, 0.35 air, and 0.15 water in its volume fraction, the air/soil partition coefficient for benzene and trichloroethylene is 3.33.
Benzene is an organic compound with the molecular structure C6H6. The benzene molecule is made up of six carbon atoms joined to one another in a planar ring and one hydrogen atom coupled to each one. Due to its pure carbon and hydrogen atom composition, benzene is a hydrocarbon. In fluid mechanics and chemistry, the volume fraction is the ratio of a constituent's volume to the sum of all the other constituents' volumes.
0.5/15 = 3.33 is the benzene coefficient.
coefficient for benzene = 0.5/0.15 = 3.33
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Which position has the most kinetic energy?
1
2
3
4
Kinetic energy is the energy an object possesses due to its motion. The amount of kinetic energy an object has is directly proportional to the mass of the object and the square of its velocity.
Without any specific information about the mass of the object or its velocity at each position, it's impossible to determine which position has the most kinetic energy. The kinetic energy will depend on the mass and velocity of the object at each position, and without that information it's impossible to compare the kinetic energy of each position.
Sulfur dioxide is present in our atmosphere, and is used as a preservative and foods. Is it possible to use the common charges that sulfur an oxygen make to determine this formula
Sulphur dioxide (SO2) is a molecule that consists of one sulphur atom and two oxygen atoms. The sulphur atom has a charge of +6 and the oxygen atoms have a charge of -2, so the overall charge of the molecule is neutral, as the charges cancel out.
The formula for sulphur dioxide is determined by the number of atoms of each element that are present in the molecule. In the case of sulphur dioxide, there is one sulphur atom and two oxygen atoms, so the formula is written as SO2.
The common charges formed by sulphur and oxygen can be used to determine the formula of a compound. The charges of the atoms can be used to determine the number of atoms needed to balance the charges and result in a neutral compound. However, it would not be the only way to determine the formula of a compound; other ways include observing the chemical reactions, using mass spectroscopy, or using X-ray crystallography.
It is possible to use the common charges that sulphur and oxygen atoms make to determine the formula of a compound by determining the number of atoms needed to balance the charges and result in a neutral compound. However, this is not the only way to determine the formula of a compound. Other methods include observing the chemical reactions, using mass spectroscopy, or using X-ray crystallography.
In summary, the formula for sulphur dioxide (SO2) is determined by the number of atoms of each element that are present in the molecule, which in this case is one sulphur atom and two oxygen atoms. The charges of the atoms can be used to determine the number of atoms needed to balance the charges and result in a neutral compound, but it is not the only way to determine the formula of a compound.
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it took 32.47 ml of .1224 m naoh to reach the endpoint when titrating a sample containing .4073 g of an unknown acid. how many moles of sodium hydroxide were used? you must show all all calculations to receive credit.
It took 32.47 ml of .1224 m NaOH to reach the endpoint when titrating a sample containing .4073 g of an unknown acid.
The formula for number of moles(n) is:
n = Molarity × Volume( in liters )
n = 0.1224 x32.47 ÷ 1000 moles
n = 0.00397 Moles.
[tex]3.9 * 10 ^-3 Mol NaOH[/tex]
Sodium hydroxide is sometimes known as caustic soda or lye. It is a common ingredient in cleansers and soaps.
At room temperature, sodium hydroxide is a solid that is white and odorless. Sodium hydroxide is a liquid that has no color or smell. It can have violent interactions with water and strong acids. The corroding acid is sodium hydroxide. NaOH may heat up as it dissolves if airborne moisture reacts with it. This heat may be sufficient to start a fire if it is close to combustible materials.
Sodium hydroxide is useful because it can alter lipids. It is a crucial component of household products like liquid soap and drain cleaners. White pellets or a solution in water are the two most widely available forms of sodium hydroxide for sale.
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• When you peel an orange the fragrance you smell is called an ester. This ester is 69.8% carbon, 18.6% oxygen and 11.6% hydrogen. When 5.3g is vaporized at 1250C
and 102kpa it occupies 1L. What is the molecular formula of this ester?
The molecular formula from percent composition and empirical formula is C₅H₁₀O.
What is empirical formula?Empirical formula of a compound is defined as the simplest whole number ratio of atoms which are present in a compound.
Molecular formula is determined from the empirical formula by dividing the molar mass of a compound by the empirical formula mass. The resultant which should be a whole number or very close to the whole number , then the subscripts are multiplied by the whole number to get the molecular formula.
Here, for C= 69.8/12=5.82/1.16=5
for O= 18.6/16=1.16/1.16=1
for H=11.6/1=11.6/1.16=10
Thus, the the molecular formula of this ester is C₅H₁₀O.
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if the kinetic and potential energies of a liter of oxygen molecules are 250 j and 1200 j, respectfully, the liter is most likely to be in what phase according to the passage?
If the kinetic and potential energies of a liter of oxygen molecules are 250 j and 1200 j, respectfully, it is likely that the liter of oxygen molecules is in a gaseous phase.
According to the passage, the kinetic and potential energies of a liter of oxygen molecules are 250 J and 1200 J, respectively. Kinetic energy is the energy of motion, and potential energy is the energy stored in an object due to its position or configuration. Therefore, it is likely that the liter of oxygen molecules is in a gaseous phase. Gases have high kinetic energy and relatively low potential energy because their molecules are in constant motion and have more distance between them, resulting in weaker intermolecular forces. It's worth noting that the kinetic energy alone is not enough to determine the phase of the substance, as it can be in any of the three states of matter (solid, liquid, and gas) and the potential energy alone is not enough as well. The phase of the substance can be determined by comparing the kinetic and potential energies, and other thermodynamic parameters such as temperature, pressure, and volume.
So, based on the given information the liter of oxygen molecules is most likely to be in gaseous phase.
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A student has measured the volume of a sample of hydrogen gas and has found that she has a total of 18.06 moles of the gas. What is the mass of this sample of hydrogen gas?
Please help me with this, and please explain it step by step so I know next time! (thank you)!!
The mass of one mole of hydrogen gas (H₂) is 2 g/mol. Then, the mass of 18.06 moles of hydrogen gas is 36.12 g.
What is one mole ?One mole of any substance contains 6.02 × 10²³ atoms. This number is called Avogadro number. Thus, one mole of every elements contains Avogadro number of atoms.
Similarly one mole of a compound contains Avogadro number of molecules. Hydrogen normally exists in the molecular state H₂ as hydrogen gas.
Molecular mass of H₂ = 2 g/mol.
given number of moles = 18.06 moles.
mass of hydrogen gas = number of moles × molecular mass
mass = 18.06 × 2 = 36.12 g.
Therefore, the mass of 18.06 moles of hydrogen gas is 36.12 g.
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Waves have energy that causes particles in matter to vibrate. So, it stands to reason that(1 point)
Waves have energy that causes particles in matter to vibrate, which is why they can transfer energy and heat through matter.
How does the frequency of a wave relate to its energy?The frequency of a wave is a degree of what number of oscillations or cycles of the wave arise in a given time period. It is measured in hertz (Hz). The electricity of a wave is associated with its frequency in that the higher the frequency of the wave, the extra electricity it contains. This is due to the fact greater oscillations according to 2nd manner that extra electricity is being transferred in a given amount of time. So, waves with better frequency have more power than waves with decrease frequency. That is why waves with high frequency like X-rays and Gamma rays are considered dangerous as they create more energy and may reason ionization, even as waves with low frequency like Radio waves are less dangerous as they bring less energy.
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