Answer:
false
Explanation:
An ancient copper coin was found to absorb 545.8 J of heat when the temperature increases 31.4°C. The specific heat of copper is 0.387 J/g'C. What is the mass of the copper coin?
The mass of the Copper coin is 44.9g
Given that,
q = 545.8 J ; c = 0.387 J/g°C ; ΔT = 31.4°C
To find the mass of the copper the following formula which is used to find the heat absorbed by a substance is to be used:
q = mcΔT
where
q = quantity of the heat
m = mass of the substance
c = specific heat capacity of the material
ΔT = change in the temperature
Therefore, on rearranging the formula to find the mass of copper coin we get,
m = q/cΔT
On substituting the values of q, c and ΔT we get
m = 545.8 J/(0.387 J/g°C * 31.4 °C)
On solving we get,
m = 44.9g
Therefore the mass of the copper coin is 44.9g.
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How many total atoms are in 0.310 g of P2O5?
Answer:
1.314E21 atoms
Explanation:
.310 / 142 = .002183
.002183 x 6.02E23 = 1.314E21
HELP ME IM GIVING BRAINLEST!!
Answer: 17, Si
Explanation:
Desublimation examples
Some examples of Desublimation include
Formation of frost in the windows during winters.Deposition of soot in chimneysSnow FormationCarbon-di-oxide gas inside the fire extinguisher is stored under high pressure, when released the gas converts into solid and expels out as white powder.Desublimation is a reverse process of sublimation in which the phase transition of a substance from gas to solid takes place directly without going through the liquid phase.
Desublimation is an example of exothermic phase change that occurs at temperatures and pressures below a substance’s triple point in its phase diagram.
Desublimation is also called as deposition. It occurs mainly by a drastic loss in thermal energy from the surrounding gas due to the presence of a much cooler surface.
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draw the structure of the two tertiary (3°) alcohols with the molecular formula c7h16o that contain a only one ch3 group attached to the main carbon chain.
The structure that will be formed is: 2-methyl, hexan-2-ol.
What is a six-carbon chain?According to the query, the main chain has one distinct methyl group coming off of it. As a result, if we take away one carbon from the formula, we are left with six carbons, indicating that our structure has a six-carbon main chain.
CH₃ CH₂ CH₂ CH₂ CH₃
Additionally, it is said that we possess two tertiary alcohols. However, as the formula is C₇H₁₆O, only one more alcohol group can be added. When the functional group -OH is joined to a tertiary carbon, which is carbon with only one bond, the result is a tertiary alcohol. Since adding methyl groups and alcohol to the same carbon is the only way to convert our 6-carbon chain into tertiary alcohol, we are unable to add the -OH to either end of the chain. Therefore, in our 6-carbon chain, the 2-, 3-, 4-, or 5-carbon must receive the -OH:
CH₃-CH-CH₂-CH₂-CH₂-CH₃
|
OH
Our structure now comprises 6 carbons, a 6-carbon chain, and tertiary alcohol. We will extend our 6-carbon chain by one methyl group. We require a distinct methyl group that extends from the initial 6-carbon chain. We are limited to placing this methyl group on the 2-carbon. As a result, the structure we seek is:
CH₃
|
CH₃-C—CH₂- CH₂- CH₂-CH₃
|
OH
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how many electrons are in 40 Ne?
40 Ne has 10 electrons which consist of 10 protons and 10 neutrons
Neon is a chemical element which is rare gas or noble gas as it has a stable octet electronic configuration, meaning it has 8 valence electrons in its outermost shell.
Neon belongs to group 0/VIII and period 1 of the periodic table.
What is an element?An element is a substance which takes part in a chemical reaction. There are different classes of elements which includes the metals, nonmetals and the metalloids.
So therefore, 40 Ne has 10 electrons which consist of 10 protons and 10 neutrons.
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Find the feature not shared by lipids, nucleic acids, and proteins. First exclude the four features that are shared by all three classes of large molecules.
With the exclusion of the first four features that are shared by all three classes of large molecules. They can all form strings of hundreds of repeating monomer units". Option C
This is further explained below.
What is a monomer unit?Generally, A monomer is a molecule that, via a process known as polymerization, may interact with other monomer molecules to produce a longer polymer chain or three-dimensional network.
In conclusion, With the first four characteristics, which are shared by all three types of big molecules, are excluded. Each of them has the ability to create long, repeating monomer unit strings. Choice C
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they can all form strings of hundreds of repeating monomer units".
cq
Find the feature not shared by lipids, nucleic acids, and proteins. First exclude the four features that are shared by all three classes of large molecules.
O They are all based on carbon.
O They are all made from a limited variety of different building blocks. They can all form strings of hundreds of repeating monomer units. OTheir building blocks contains H on one end and OH on the other end. They are all broken down by hydrolysis.
Which of the following properties can only be measured in solids? PLEASE HELP ME
A.Shape and color
B.Size and color
C.Size and shape
D.Size and texture
Answer:
size and shape because solids nomally have a fixed shape and volume
I think it would be, C. Size and Shape.
Because, when measuring objects in solids u should measure the Size because the color is just paint and the texture is just how it feels. The shape can be measured in solids too.
So, your answer is C.
Good job if you made it this far!
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Combine the first two equations and laws of exponents to find the equation for the mass of sodium remaining after y years. s = 800(0.165)y s = 800(0.766)2.6/y s = 800(0.5)2.6y s = 800(0.766)y
Answer:
the answer Is d
Explanation:
Answer:
that would be D
Explanation:
hope this helps
~RayneIsLost~
PLEASE HELP VERIFIED PEOPLE
Which of the following compounds is a base?
Select one:
a. HNO3
b. HCl
c. Al(OH)3
d. H2SO4
Answer:
I'm not verified but I do know that HNO3 is a base and a potent acid
Explanation:
It is used as a nitrating agent. because its base is more stable its stronger than nitrous acid HNO3 can be made by the formula NO 2 + H 2O → 2 HNO 3 + NO (the reaction of NO2 with water). it can be used to produce ammonium nitrates to make plastic, dye, and fertilizers, make explosives and a oxidizer in liquid-fueled rocket thrusters.
Explain what is means when energy is converted
Answer:
Energy conversion is the process of changing one form of energy into another.
.Copper wire is used to transfer electricity.
There are 19.3 grams of gold in one cubic centimeter.
Iron turns to liquid at 1,534.85°C.
Silver is very easy to bend.
Fluorite is a green crystal.
Answer:
What is the question?
Explanation:
This is a answer.
If 1.50 g of h2c2o4 . 2h2o were heated to drive off the water of hydration, how much anhydrous h2c2o4 would remain?
If 1.50 g of H₂C₂O₄.2H₂O were heated to drive off the water of hydration, 1.071 g of anhydrous H₂C₂O₄ would remain.
The balanced chemical equation of reaction is :
H₂C₂O₄.2H₂O → H₂C₂O₄ + 2H₂O
First calculate the molecular weight of hydrated H₂C₂O₄ -
Using the molecular masses of -
O = 16 g/mol, C = 12 g/mol, and H = 1 g/mol
Total mass of compound = 126 g/mol
Molecular mass of H₂C₂O₄ = 90 g/mol
and, molecular mass of water of hydration = 36 g/mol
The percentage of H₂C₂O₄ in H₂C₂O₄.2H₂O is -
% H₂C₂O₄ = 90 g/mol = 0.714 %
126 g/mol
To calculate remainingIf 1.50 g of H₂C₂O₄.2H₂O were heated to drive off the water of hydration, 1.071 g of anhydrous H₂C₂O₄ would remain.
The balanced chemical equation of reaction is :
H₂C₂O₄.2H₂O → H₂C₂O₄ + 2H₂O
First calculate the molecular weight of hydrated H₂C₂O₄ -
Using the molecular masses of -
O = 16 g/mol, C = 12 g/mol, and H = 1 g/mol
Total mass of compound = 166 g/mol
Molecular mass of H₂C₂O₄ = 126 g/mol
and, molecular mass of water of hydration = 36 g/mol
% H₂C₂O₄ = 126 g/mol = 0.7590
166 g/mol
75.90 % of 1.50 g = 0.714
To calculate remaining amount of anhydrous H₂C₂O₄,
we take percentage of anhydrous H₂C₂O₄ with the mass of hydrous compound which is heated.
71.4% of 1.50 g = 1.071 g
Therefore,
The anhydrous H₂C₂O₄ remaining is 1.071 g.
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controllable and scalable synthesis of hollow-structured porous aromatic polymer for selective adsorption and separation of hmf from reaction mixture of fructose dehydration
Controllable and scalable synthesis of hollow - structured porous aromatic polymer for selective adsorption and separation of hmf from reaction mixture of fructose dehydration is H-PAP show exclusive adsorption , without adsorption of fructose and HMF with high purity from reaction mixture of fructose dehydration is recovered.
Hollow structure porous aromatic compound H-PAP with cavity were controllably prepared through surface coating and etching method under scalable synthesis. It is found that the fill factor (f) of a reactor is an important parameter for finding scalability of synthesis. the well developed H-PAP as adsorbent was investigate in adsorption of HMF (5-hydroxymethylfurfural) under static mode from single component to multi component aqueous solution. in the case of HMF adsorption from real reaction mixture of acid catalyzed fructose dehydration with high purity (94.4%) recovered.
thus,in controllable and scalable synthesis,HMF with high purity from reaction mixture of fructose dehydration is recovered.
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(01.02 LC) Which of the following is the unit of length in the metric system?
Group of answer choices
A:Foot
B:Inch
C:Meter
D.Mile
Answer:
Meter.
Explanation:
A foot is a American standard. Inch is also. A Mile is for a American. Kilometers are the metric. That leaves only the Meter.
A compound consists of 37. 51 g c, 4. 20 g h, and 58. 29 g o. What is the empirical formula?.
A compound has 58. 29 g of oxygen, 4. 20 g of h, and 37. 51 g of carbon. The empirical formula is C6H8O7.
What is an empirical formula?Empirical formulas are those that provide proportions of the constituent elements of a compound but not the precise number or arrangement of atoms.
This can be done by calculating molar ratio of elements using masses and molar masses of the element.
Mass of the Carbon (C) in given compound is= 37.51g
Mass of the Hydrogen (H) in given compound is= 4.20g
Mass of the Oxygen (O) in given compound is= 58.29g
Molar mass of C = 12.0107g
Molar mass of H = 1.00784g
Molar mass of O = 15.999g
by diving the mass of the elements with their respective molar masses we get number of moles of elements:
no. of moles of C= 37.51/12= 3.123moles
no. of moles of H= 4.20/1.00784 =4.167moles
no. of moles of O = 58.29/15.999 = 3.643moles
Molar ratio of elements/atoms can be obtained by diving the above number of moles with the lesser number of moles in the above three,
C= 3.123/3.123
H= 4.167/3.123
O= 3.653/3.123
Each ratio is multiplied by "6" to produce a complete number:
C= 1*6
H= 1.334*6
O= 1.166*6
The empirical formula is= C6H8O7.
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If you add a chunk of zinc to a beaker of acid and zinc shavings to another beaker of acid, the sample with the zinc shavings will react faster. What property causes the increase in rate?.
The property that causes the zinc shavings to react faster than the chunk of zinc is called the surface area.
When performing any type of chemical reaction, the surface area is an important aspect to take into account because it significantly affects the reaction's rate. The rate of reaction increases with decreasing surface area.
When compared to zinc shavings, which have been broken down into zinc particles with smaller surface areas, a chunk of zinc is similar to a body of stone held together by strong bonding.
In comparison to the huge chunk of zinc, the reactive surface area of the zinc shavings is smaller. Reactants' lower surface areas make it necessary for them to be in close contact with the acid solution for the reaction to occur.
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Unit 1 Assessment Please Help Quick ASAP Hurry
1. When converting inches to Km, a proper progression utilizing conversion factors would be:
A. inches to ml to m to Km
B. inches to cm to m to Km
C. inches to Km
D. Km to feet to inches
Question 2
The use of conversion factors to solve SI conversion problems is effective because:
A. Conversion factors allow you to effectively cross out the appropriate units along each step of the problem.
B. Conversion factors are not helpful because you have use of a calculator.
C. Conversion factors give you the appropriate distance to plug into the problem.
D. Conversion factors allow you to solve conversions without use of a calculator.
Question 3
246,000 mm is how many Km?
A. 0246
B. 246 km
C. 24.6 Km
D. .246 Km
Question 4
Refer to your periodic table. The orbital notation for Aluminum in the outer most shell would have how many electrons in the S orbital, and how many in the p orbital?
A. 1 electron in the s orbital, and none in the p.
B. 2 electrons in the s orbital, and 3 in the p orbital
C. 2 electrons in the s orbital. None in the p orbital
D. 2 electrons in the s orbital and 1 in the p orbital
1. A proper progression utilizing conversion factors would be km to feet to inches.
2. Conversion factors allow you to effectively cross out the appropriate units along each step of the problem.
3. 246,000 mm is how many Km is 0246.
4. There are 2 electrons in the s orbital, and 3 in the p orbital.
A conversion factor is a number used to convert one set of units to another set by multiplication or division. If the conversion is required, the values should be equal using the appropriate conversion factor. To find the electron configuration of an atom, we first need to know how many electrons the atom has. Aluminum has an atomic number of 13, so it has 13 electrons.
The last shell after the electron configuration is called the valence shell. The total number of electrons in the valence shell is called valence electrons. The electron configuration of the aluminum shows that there are three electrons in the last shell of aluminum. Therefore the valence electron of aluminum is 3 The outermost valence shell of aluminum has three electrons. Al now has an electronic configuration similar to the noble gas neon so it can donate three electrons to form a cation.
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octylphenol ethoxylate is a detergent that is commonly used in chemistry laboratories. it is a thick, yellowish liquid. a chemist dissolves a small amount of octylphenol ethoxylate in a liter of benzene, an organic liquid, then adds a small amount of toluene, another organic liquid. identify each component of the solution as a solute or a solvent. benzene is a toluene is a octylphenol ethoxylate is a
Benzene is a Solvent
Toluene is a Solute
Octylphenol ethoxylate is a Solute
Is benzene considered a solute?
This problem is directly related to an intriguing phenomenon in which a benzene molecule has a negative solvation free energy of -0.87 kcal/mol in ambient water despite being a nonpolar organic solute.Because the pi cloud of the benzene ring can interact with the pi clouds of various solutes, it is more capable of dissolving many organic substances than a saturated hydrocarbon such as hexane. Polystyrene, for example, will be solvated better by benzene than by hexane for this reason.Non-polar solvents such as benzene are used in the production of polymers and plastics, phenol for resins and adhesives, rubber, lubricants, dyes, detergents, drugs, explosives, napalm, and pesticides.Examples of Solvents Solvents commonly used include water, ethanol, methanol, and acetone. A' solvent' is a substance that has the ability to dissolve a given solute in order to form a solution with it.
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Answer:
Benzene is a solvent.
Toluene is a solute.
Octylphenol ethoxylate is a solute.
Explanation:
Molecular scale for gas
the bohr model describes what is possible outside the nucleus of an atom. one of the limitations of this model is that it only works for atoms or ions that have the same number of electrons as hydrogen. how many electrons does a hydrogen atom possess? fill in a number in the blank provided.
The bohr model describes that the electron is possible outside the nucleus of an atom. Electrons are negatively charged exist in orbits around the nucleus.
Because we assume that the only source of centripetal force is the nucleus's electrostatic force of attraction when we calculate the formula for a radius, energy levels, etc. Therefore, this only applies to atoms with a single electron. Repulsion caused by other electrons will also exist in multi-electron atoms.
Hydrogen atoms contain one electron, which is located outside the nucleus. With two protons, helium will also have two electrons.
The limitation with Bohr's model is that it performs admirably for atoms with just one electron, such as H or He+, but appallingly poorly for atoms with multiple electrons.
The atom of hydrogen possesses only one electron which are present outside the nucleus.
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b. Complete the table to show the effect of each change on the gravitational
force between two objects. (2 points)
Change
Multiply one of the masses by 2.
Multiply the distance by 2.
Effect on gravitational force
The gravitational force of attraction is 4.2 * 10^23 N.
What is the gravitational force?The gravitational force is a force that acts on objects that are within the earth’s gravitational field. We know that the gravitational force is an attractive force and it acts on the mass as it is in the universe.
The force of gravity has its direction as towards the center of the earth. Knowing that;
F = Gm1m2/r^2
F = gravitational force
G = gravitational constant
M1 and M2 = masses of the objects
Hence;
When one of the masses is multiplied by 2, the magnitude of the gravitational force is doubled.
When the distance of separation is multiplied by 2, the magnitude of the gravitational force decreases by a factor of 4.
Now let us obtain the magnitude of the gravitational force;
F = 6.6743 × 10-11 * 1.90 * 10^27 * 1.99 * 10^30/(7.78 * 10^11)^2
F = 4.2 * 10^23 N
The gravitational force of attraction is 4.2 * 10^23 N.
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The chemical equation below is incorrect.
Zn + HCI ---> ZnCl2 + H₂
O Zn + 2HCI ---> ZnCl2 + H₂
O 2Zn + 2HCI ---> ZnCl2 + H2
O Zn + HCI ---> ZnCl2 + H₂
O 4Zn + 2HCI ---> ZnCl2 + H2
The area of a telescope lens is 6.902x10^3 mm^2 what is the area in square feet. Answer in scientific notation
The area of the telescope lens in square feet (ft²) is 7.429×10⁻² square foot)
Conversion scale92903 square millimeter = 1 square foot
From the question given above, the following data were obtained:
Area (in square millimeter) = 6.902×10³ mm²Area (in square feet) =?We can obtain the area in square feet as illustrated below:
92903 square millimeter = 1 square foot
Therefore,
6.902×10³ square millimeter = (6.902×10³ square millimeter × 1 square foot) / 92903 square millimeter
6.902×10³ square millimeter = 7.429×10⁻² square foot)
Thus, the area of the lens in square foot is 7.429×10⁻² square foot)
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pressure only affects solubility of a substance in the ____ phase, not the ____ phase.
Pressure only affects the solubility of a substance in the gaseous phase, not the liquid or solid phase.
What is Solubility?Solubility may be defined as the maximum amount of any substance that will significantly dissolve in a definite amount of solvent at a specified temperature. It is the property of substances that shows their ability to intermingle with other substances known as solvents.
According to the context of this question, liquids and solids exhibit practically no alteration in solubility with respect to changes in pressure. But when you enhance the pressure of a gas phase, the collision frequency between its particles increases, and thus the solubility goes up, as you reduce the pressure, the solubility goes down.
Therefore, the pressure only affects the solubility of a substance in the gaseous phase, not the liquid or solid phase.
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Question
Which atom would be neutral?(
Responses
an oxygen atom with 9 electrons, 8 protons, and 8 neutrons
an oxygen atom with 9 electrons, 8 protons, and 8 neutrons
an oxygen atom with 16 electrons, 18 protons, and 16 neutrons
an oxygen atom with 16 electrons, 18 protons, and 16 neutrons
an oxygen atom with 8 electrons, 8 protons, and 9 neutrons
an oxygen atom with 8 electrons, 8 protons, and 9 neutrons
an oxygen atom with 4 electrons, 6 protons, and 4 neutrons
Answer:
an oxygen atom with 8 electrons, 8 protons, and 9 neutrons
an oxygen atom with 8 electrons, 8 protons, and 9 neutrons
Explanation:
In order for atoms to be neutral, it has to have the same amount of electrons and protons
the hybridization of one s and one p orbital will result in the formation of sp hybrid orbitals. this will leave unhybridized p orbital(s), which is/are at right angles to the hybrid orbitals. the formation of a group of sp2 hybrid orbitals leaves unhybridized p orbital(s).
Amphibians have a closed circulatory system. What does this mean?
A. Fluids flow everywhere
B. Fluids stay in the lungs
C. Fluids are contained in tubes
D. Fluids do not flow
According to the research, the correct option is C. Amphibians have a closed circulatory system this means fluids are contained in tubes.
What is the circulatory system?It comprises the heart, arteries, veins and lymphatics and systems responsible for supplying oxygen and distributing blood to the different parts of the body.In this sense, amphibians are tetrapod vertebrates that develop lungs whose blood circulates through a closed circuit of arteries and veins.A closed circulatory system means that the blood, when circulating, always moves in the blood vessels, through which all the organs and regions of the body receive blood rich in oxygen.Therefore, we can conclude that according to the research, the correct option is C. Amphibians have a closed circulatory system this means fluids are contained in tubes.
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tion 6 of 30
at type of nucleus is the strong nuclear force greater than the
rostatic force?
Answer:
bro you can explane why is so hard
Explanation:
list the first 20 elements with their properties
H - Hydrogen
He - Helium
Li - Lithium
Be - Beryllium
B - Boron
C - Carbon
N - Nitrogen
O - Oxygen
F - Fluorine
Ne - Neon
Na - Sodium
Mg - Magnesium
Al - Aluminum
Si - Silicon
P - Phosphorus
S - Sulfur
Cl - Chlorine
Ar - Argon
K - Potassium
Ca - Calcium