How many moles are in 1.24 * 10^25 of carbon?
Answers
Answer:
2.059800664 x 10^47 moles
Explanation:
Related Questions
How much of a 500g sample of potassium-42 is left after 37.2 hours if the half-life of potassium-42 is 12.4 hours
Answers
Answer:
15.625 g of a 500 gram sample of potassium-42 with 12.4 hours of Half -life is left after 62 hours.
The half-life is the time after which half of the initial quantity of a radioactive substance is left .
Given here,
The half-life of K-42 = 12.4 hours
The initial quantity of K-42 = 500 gm
The final quantity after 62 hours = ?
The number of half cycle
Thus the number of half life cycles in 62 hours is 5,
After 1 half life
After 2 half lives
After 3 half lives
After 4 half lives
After 5 half lives
15.625 g of a 500 gram sample of potassium-42 with 12.4 hours of Half -life is left after 62 hours.
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Estimate the percent ionic character of the co bond. (note that the electronegativity of c is 2.5 and that of o is 3.5.)
Answers
From the calcuation, the percent ionic character of the bond is 70%
What is percent ionic character?The term percent ionic character has to do with the degree of ionic bonding that is contained in a compound. It can be estimated from the electronegativity of each element.
We can use the formula; 100(1 - e^(-ΔEN² / 4))
EN = χB − χA * 100/1
EN = 3.5 - 1.5 = 1
100(1 - e^(-1)^2/4)
= 70%
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Answer: 25
Explanation:
The electronegativity of a C
atom is 2.5, and the electronegativity of an O
atom is 3.5. The absolute value of the electronegativity difference is
electronegativity difference= |2.5−3.5|
= 1.0 = 25%
Note the trend between the points in the bottom left region of the chart. According to this trend, the percent ionic character of a bond with a dipole moment 1.0 is approximately 25 %
Solar energy, geothermal energy, water and wind energy are 1.__________________ resources. coal, oil, natural gas are examples of 2.__________________resources. 3._______________or heat from the ground is less polluting than crude oil. but when they are taken from deep under the ground, areas that have high biodiversity are destroyed. hydropower (hydro meaning water) is energy that comes from the force moving 4._______________. flowing water creates energy that can be captured and turned into 5. ______________. the most common type of hydroelectric power plant uses a dam on a river to store water in a reservoir. natural gas is a form of 6. _____________, so are coal and crude oil (sometimes called petroleum). in the philippines, we have coal and natural gas deposits. 7. ______________is a black or brownish black, solid rock that can be burned. 8. ____________ is a clean energy source that we can rely on for a long-term future. a wind turbine creates reliable, cost- effective, pollution-free energy. it is affordable, clean, and sustainable. 9._____________ is the practice of caring for these resources so all living things can benefit from them now and in the future. to use natural resources 10_________________, we need to rethink which resources we use and how we use them. we
Answers
Answer:
1.Renewable resources.
2.Non- Renewable
3. Geothermal Energy.
4. Kenetic
5.Hydroelectric energy
6. Fossil fuels.
7.Coal
8.Wind power? (im trying to work with what you gave me)
9.Conservation
10. in the future? (these are ones that you have to think about)
Explanation:
you didnt give a key so at least give me credit for working with what i got.
Solar energy, geothermal energy, water and wind energy are renewable resources, Non- renewable, geothermal energy, kinetic, hydroelectric energy, fossil fuel, coal, wind power, conservation.
What is renewable resources?Renewable resources are energy sources that are never depleted and can provide a steady supply of clean energy.
What is energy?The capacity to work is defined as energy. It can take the form of potential energy, kinetic energy, thermal energy, electrical energy, chemical energy, nuclear energy, or any other form.
1) Renewable resources resources. coal, oil, natural gas are examples of
2) Non- renewable sources.
3) Geothermal energy or heat from the ground is less polluting than crude oil. but when they are taken from deep under the ground, areas that have high biodiversity are destroyed. hydropower (hydro meaning water) is energy that comes from the force moving.
4) Kinetic lowing water creates energy that can be captured and turned into
5) hydroelectric energy the most common type of hydroelectric power plant uses a dam on a river to store water in a reservoir. natural gas is a form of
6) fossil fuel so are coal and crude oil (sometimes called petroleum). in the Philippines, we have coal and natural gas deposits a black or brownish black, solid rock that can be burned.
8.) Wind power is a clean source that we can rely on for a long-term future. a wind turbine creates reliable, cost- effective, pollution-free energy. it is affordable, clean, and sustainable.
9) .Conservation is the practice of caring for these resources so all living things can benefit from them now and in the future. to use natural resources
10) In the future, we need to rethink which resources we use and how we use them.
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How do models help scientists predict the polarity of molecules? Explain your answer using what you know about molecular structure and provide an example of a molecule that contains polar bonds, but is nonpolar.
Answers
Answer:
Explanation:
Models help scientists predict the polarity of molecules because the bond polarity should be determined that lies between the molecule atoms.
Models help scientists predict the polarity of molecules because the bond polarity should be determined that lies between the molecule atoms.
You can use the difference in electronegativity of two atoms to predict whether they make polar, nonpolar or ionic bonds. Water is a well-known example of a polar molecule.
The information with respect to the atom is as follows:
The bond that lies between the same atoms i.e. same elements should always be neutral.The bond that lies between the atoms of the different elements should always be inequivalent electrically as one atom should be positively charged and the other one should be negatively charged.How do you determine the polarity of a solution?Simply mix the liquid with an equal part of water and allow the mixture to sit undisturbed. Examine the mixture after the liquids have sat together for a time. If they have not separated, but have formed a solution, the unknown liquid is polar. If there is a clear boundary between the two liquids, it is non-polar.
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Why have scientists changed their ideas on the model of the atom?
Answers
Answer:
Scientists used the model to make predictions. Sometimes the result of the experiments were a surprise and they did not fit with the existing model!
Describe in your own words, why a balloon, after it has been rubbed on a sweater, floats back towards the sweater when released.
Your answer must contain electric force, attract, electrons, and protons.
Answers
Explanation:
By rubbing the balloon on a sweater, you can transfer negative charges onto the surface of the balloon
based on location on the periodic table, which metal is likely to be less reactive than both strontium and sodium?
Answers
Answer:
Magnesium is likely to be less reactive than both strontium and sodium
Answer:
The answer is Magnesium (Mg)
In Africa, the oxpecker is a bird that eats bugs and other parasites from the skin of a rhino. This helps protect the rhino’s skin and keeps the bird fed. Which of the following describes the type of relationship that exists between the oxpecker and the rhino?
Answers
Answer:
mutual relationship
Explanation:
pls mark brainliest
Which option is a nonrenewable resource?
O at least some types of lumber
O solar energy
O oil
O wind
Answers
Oil
Explanation:
Trees can be replanted
Solar energy and wind is not depleted when used
Convert these pressures:
820 mm Hg =____ atm
206 kPa =
atm
0.6 atm =
kPa
1520 mm Hg = __ kPa
850 kPa =
mm Hg
Answers
1 kPa = 1000 pascals (Pa)
1 mmHg = 133.322 pascals (Pa)
kPa value x 1000 Pa = mmHg value x 133.322 Pa.
kPa value = mmHg value x 0.133322
One of the examples of homologous series is given below:
CH3OH
CH3CH2OH
X
CH3CH2CH2CH2OH
i. Define homologous series,
ii. Find the mass difference between successive members of above homologous series and calculate the molecular mass of x.
iii What is the reason behind the highest boiling point bu least solubility of the fourth member in the given series?
Answers
Homologous series: Homologous series is the series in which the functional group of any compound and their chemical properties are similar, the difference between any two successive members is same.
Above homologous series is of Alkanol
[tex] \tiny\sf \: general \: formula \: for \: Alkanol \rightarrow C_nH_{2n+2}O[/tex]
Above homologous series is differed by methylene (-CH2-) group. hence the mass diffrence between them would be the mass of -CH2- group.
[tex] \small \sf \: CH_2 = = 12+1+1 = 14 \: a.m.u. \\ \hline[/tex]
The compound X is next to CH3CH2OH hence, X will have molecular formula CH3CH2CH2OH which is obtained by addition of a methylene group.
[tex]\tiny\: the \: compound \: x \: (n = 3) \: have \: general formula =C_3H_{8}O \\ \small \sf \: The \: molecular \: mass \: of \: X =3 \times 12 + 8 \times 1 + 16 \\ \sf = 60 \: a.m.u[/tex]
The reason behind the highest boiling point of butanol is his molecular mass, the main reason is the surface area, as the molecular mass increases surface area also increases which lead to increase in the vanderwall forces, due to which boiling point of compound increases. the same compound having least solubility is due to lyophilic/Hydrophobic ( tendency to get dissolved in non aqueous solution) increases & solubility of compound in polar solvents decreases.
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Give a brief description of the symptoms associated with dissociative fugue.
Answers
Answer:
People may seem and act normally during the fugue, or they may appear moderately bewildered and draw no notice. When the fugue is over, however, people are thrown into a new scenario with no recall of how they got there or what they were doing.
Explanation:
How exactly are synthetic paint brushes made? Nylon?
Answers
Answer:
Synthetic brushes are typically made from nylon bristles. Other times, they're made from plastic#CARRYONLEARNINGBY : EDLYN MORENO
The reactions listed below are either chemical reactions or nuclear reactions. which are nuclear reactions? check all that apply. upper h superscript plus, plus upper o upper h superscript minus right arrow upper h subscript 2 upper o. superscript 185 subscript 79 upper a u right arrow superscript 181 subscript 77 upper r d plus superscript 4 subscript 2 upper h e. 4 upper f e plus 3 upper o subscript 2 right arrow 2 upper f e subscript 2 upper o subscript 3. superscript 210 subscript 84 upper p o right arrow superscript 206 subscript 82 upper p b plus superscript 4 subscript 2 upper h e.
Answers
The equations that are nuclear reactions are as follows:
superscript 185 subscript 79 upper Au right arrow superscript 181 subscript 77superscript 210 subscript 84 upper Po right arrow superscript 206 subscript 82 upper Pb plus superscript 4 subscript 2 upper He.What is nuclear reaction?A nuclear reaction is a reaction that involves the fission of an atomic nucleus, or the fusion of one or more atomic nuclei and/or subatomic particles in which the number of protons and/or neutrons in a nucleus changes.
The products of a nuclear reaction may contain a different element or a different isotope of the same element.
Therefore, the equations that are nuclear reactions are as follows:
superscript 185 subscript 79 upper Au right arrow superscript 181 subscript 77superscript 210 subscript 84 upper Po right arrow superscript 206 subscript 82 upper Pb plus superscript 4 subscript 2 upper He.Learn more about nuclear reaction at: https://brainly.com/question/19752321
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Answer:
b. Reaction B involves a greater change and a change in element identity.
Explanation:
i got it wrong
The type of surface that warms up the slowest is .
Answers
Answer:
Answer might be Water...
A surface with a high reflectivity or low heat conductivity typically warms up at the slowest rate. Ice, snow, and some metals, like aluminium, are examples.
A smooth surface is one that doesn't have any ridges or other surface imperfections. It is smooth and devoid of any roughness, dents, or lumps. This kind of surface, which is highly reflective, is frequently seen in materials like glass, polished metal, or plastic. Rough texture: An uneven or irregular texture is indicative of a rough surface. It has lumps, ridges, or other abnormalities that microscopically obstruct the smoothness. Rough surfaces reduce the reflecting qualities of light by scattering it in many directions. Wood, concrete, or coarse fabrics are a few examples of rough surfaces.
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What is a constant in an investigation?
Answers
Answer: Heyaa! ~
A constant in an investigation is a quantity
that does not change...
something that is not variable. In statistics, and survey research in particular, responses are typically described as random variables.Hopefully this helps you! ^^
A 500-gram C6H12O6 solution has a concentration of 300 ppm. How many grams of C6H12O6(s) are in this solution?
Answers
Considering the definition of ppm, there are 0.15 grams of C₆H₁₂O₆ in the solution.
What is ppmParts per million (ppm) is a unit of measurement for concentration that refers to the number of units of the substance in each million units of the whole.
In other words, ppm indicates the ratio of the concentration of one substance to the concentration of another, as one unit of solute dissolved in one million units of solvent.
ppm of solid and liquid elements is calculated by weight:
[tex]ppm=\frac{weight of the substance analyzed}{ overall weight} x10^{6}[/tex]
Mass of C₆H₁₂O₆In this case, you know:
ppm= 300weight of the substance analyzed= ?overall weight= 500 gramsReplacing in the definition of ppm:
[tex]300ppm=\frac{weight of the substance analyzed}{500 grams} x10^{6}[/tex]
Solving:
[tex]weight of the substance analyzed=\frac{300 x 500 grams}{10^{6}}[/tex]
weight of the substance analyzed= 0.15 grams
Finally, there are 0.15 grams of C₆H₁₂O₆ in the solution.
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How do pure substances and mixtures compare?
Answers
Answer:
a pure substance consists only of one element or one compound. a mixture consists of two or more different substances, not chemically joined together.
Explanation:
Why does the hemisphere that is titled away from the sun experience winter?
(science)
Answers
If 30.5 g of 15% potassium nitrate solution are reacted to excess magnesium chloride how many grams of potassium chloride will be form
Answers
D. Identify the building blocks of the following types of biological molecules: (4 points)i. Protein (2 points)
i. Protein (2 points)
ii. Lipid (2 points)
Answers
Building blocks are the small units that make the larger, more complex molecule. The building block of protein is an amino acid and lipids are fatty acids and glycerols.
What are proteins and lipids?Proteins and lipids are the biomolecules that are involved in major reactions in the living system. They are composed of smaller subunits joined together by bonds.
Proteins are molecules made up of amino acids linked by the peptide bonds to form the chain of proteins that plays a crucial role in cell functioning.
Lipids are composed of fatty acids and glycerol linked by the ester bond, essential for the storage of energy and in the composition of the membranes.
Therefore, proteins are composed of amino acids and lipids of fatty acids and glycerol.
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Write the nuclear equation for the beta decay Ni-60
Answers
[tex]^6^0_2_7CO\;\rightarrow\;^6^0_2_8Ni\;+\;^0_-1e[/tex] is the nuclear equation for the beta decay Ni-60.
What is beta decay?Beta-decay occurs when, in a nucleus with too many protons or too many neutrons, one of the protons or neutrons is transformed into the other.
The nuclear equation for the beta decay Ni-60
[tex]^6^0_2_7CO\;\rightarrow\;^6^0_2_8Ni\;+\;^0_-1e[/tex]
In beta minus (β−) decay, a neutron is converted to a proton, and the process creates an electron and an electron antineutrino; while in beta plus (β+) decay, a proton is converted to a neutron and the process creates a positron and an electron neutrino. β+ decay is also known as positron emission.
Hence, [tex]^6^0_2_7CO\;\rightarrow\;^6^0_2_8Ni\;+\;^0_-1e[/tex] is the nuclear equation for the beta decay Ni-60.
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Name these compounds according to IUPAC. (ASAPP)
Answers
The chemical's IUPAC names of the given compound are propanal and acetone.
What is IUPAC naming?IUPAC is the international union of practical and applied chemistry. It set rules for standard naming of the compound.
Propanal, or propanaldehyde, is an aldehyde that has one double bond and one oxygen atom.
Acetone is a kind of ketone. Ketones have the functional group R2CO.
Thus, chemical's IUPAC names of the given compound are propanal and acetone.
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What is one element that is found in the human body, air, or the universe ?
Answers
Answer:
Hydrogen
Explanation:
It is pretty much present everywhere :)
you don’t have to do all of the questions, but it would really be appreciated
Answers
Answer:
good
Explanation:
excellent news and great job on the purpose and basic activities of the business
Select the compound In which chlorine is assigned the oxidation number +5.
O HCIO
O NACIO 3
O HCIO 2
O HCIO 4
O HCI
Answers
correct option is option B
Oxidation state of Na= +1
Oxidation state of O = +2
Let Oxidation state of Cl =x
Then,
(+1) + X + 3×(-2) = 0
X-5 = 0
so x = +5
If an ice cream melts do you have more less or the same amount of matter after the melting
Answers
When ice cream melts you have the same amount of matter after the melting.
Principle of conservation of massAccording to the law of conservation of mass, mass is neither created nor destroyed but can be converted from one form to another. Hence, a mass of ice can be converted to an equal mass of water.
When ice cream melts you have the same amount of matter after the melting.
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Question 28 of 34
What are the products of the neutralization reaction between HNO3 and
NaOH?
O
A. NH3 and Na₂O
OB. NaNO3 and H₂O
OC. NaH and NO4H
OD. NO₂, H₂, and H₂O
Answers
Answer:
B
Explanation:
NaNO3 and H2O
(double replacement reaction)
B NaNO3 and H2O
Explanation:
If you take a look, HNO3 and NaOH are acid and bases. If Acid and bases are combined, they produce salt and water.
The uncalibrated portion of a Burette is known as
Answers
The stopcock is the uncalibrated portion of a burette.
What is a burette?A burette is an instrument use in quantitative analysis which has opening at both ends and a tap at one end and it is use to measuring volume of liquid in the laboratory.
Therefore, The stopcock is the uncalibrated portion of a burette.
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A gas occupies a volume of 131.0-mL at 165.2-kPa. What volume will the gas occupy at 170.8-kPa if the temperature remains the same?
Answers
The relationship between the pressure and the volume of the gas at a constant temperature is given by Boyle's law. The volume, of the gas at 170.8 kPa is 126.70 mL.
What is Boyle's law?Boyle's law states the inverse relationship between the pressure and the volume of the gas. The formula for the law can be given by:
[tex]\rm P_{1}V_{1} = P_{2}V_{2}[/tex]
Given,
Initial pressure = 165.2 kPa
Initial volume = 131.0 mL
Final pressure = 170.8 kPa
The final volume is calculated as:
165.2 * 131.0 = 170.8 * V
V = 126.70 mL
Therefore, the final volume of the gas is 126.70 mL.
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