A silver coin and a gold coin each have a mass of
exactly 6.6 grams. The specific heat of silver is
0.235 J/g•°C, and the specific heat of gold is
0.130 J/g-°C. Which coin requires more heat to raise its
temperature by 40°C?
Answers
The unit of measurement for specific heat is Joules per g times degree Celsius.
Similar to density, color, etc., specific heat is an intense feature that is independent of the amount of a substance present. This enables the use of heat specificity to identify compounds.
q = mcT, where q is the quantity of heat applied, m is the mass of the substance, c is its specific heat, and T is the temperature change.
Therefore, we can simply isolate the term in the calculation above to get c=qmT if we wish to find the units for specific heat.
We may calculate that c = JgC since heat is measured in Joules (J), mass in grams (g), and degree Celsius (C).
As a result, the unit of measurement for specific heat is Joules per g times degree Celsius.
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Related Questions
draw the organic product formed when 1−hexyne is treated with h2o, h2so4, and hgso4. click the draw structure button to launch the drawing utility.
Answers
The organic product formed when 1−hexyne is treated with H₂O, H₂SO₄, and HgSO₄ will be 2-hexanone (structure attached).
This reaction is an example of an oxymercuration reaction of the organic product 1−hexyne.
Oxymercuration is shown in three steps to the right. The nucleophilic double bond attacks the mercury ion, releasing an acetoxy group. The mercury ion's electron pair attacks carbon on the double bond, generating a positive-charged mercuronium ion. Mercury's dxz and 6s orbitals give electrons to the double bond's lowest unoccupied molecular orbitals.
In the second stage, the nucleophilic H₂O attacks the highly modified carbon, freeing its mercury-bonding electrons. Electrons neutralize mercury ions by collapsing. Water molecules have positive-charged oxygen.
In the third stage, the negatively charged acetoxy ion released in the first step attacks the hydrogen of the water group, generating the waste product HOAc. The two electrons in the oxygen-hydrogen link collapse into oxygen, neutralizing its charge and forming alcohol.
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hydrogen bonding is crucial to the transpiration-cohesion-tension mechanism. true or false
Answers
The given statement "hydrogen bonding is crucial to the transpiration-cohesion-tension mechanism" is true because it enables the cohesive properties of water that allow for efficient water transport in plants.
The transpiration-cohesion-tension mechanism is the process by which water is transported through the xylem tissue of plants from the roots to the leaves. This mechanism relies on the cohesion of water molecules and the tension created by transpiration (the loss of water vapor through the stomata of leaves).
Hydrogen bonding, which is a type of chemical bonding between the hydrogen atom of one molecule and the electronegative atom of another molecule, is crucial to the transpiration-cohesion-tension mechanism. The cohesion of water molecules is due to the presence of hydrogen bonds between adjacent water molecules.
As water molecules evaporate from the surface of leaves during transpiration, they create a negative pressure (tension) that pulls additional water molecules up through the xylem tissue. This process of water transport is only possible due to the strong hydrogen bonds between water molecules, which allow them to stick together and resist the force of gravity.
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Which piece of information do you need to determine whether a hydrocarbon
is saturated or unsaturated?
A. The type of C-C bonds in the molecule
B. The number of C-C bonds in the molecule
C. The type of C-H bonds in the molecule
D. The number of C-H bonds in the molecule
Answers
Answer:
A
Explanation:
Saturated means all the carbon atoms has four single bonds around it. These bonds are strong and won't break easily therefore saturated hydrocarbons aren't very reactive
Unsaturated means in one instance the C has a double bond with another carbon. This double bond can be easily broken therefore making unsaturated compounds more reactive than saturated compounds
So saturation deals with the type of bonds the carbon has with other carbon atoms. (The C-C bonds)
Endotoxin is released when cells are _______
i. starved for iron.
ii. gram-negative pathogens lyse or divide.
iii. cells are lysogenic for the beta phage.
iv. all of the choices are correct.
Answers
Endotoxin is released when cells are gram-negative pathogens lyse or divide (ii).
The correct choice is (ii) gram-negative pathogens lyse or divide. Endotoxin, also known as lipopolysaccharide (LPS), is a toxic component found in the outer membrane of gram-negative bacteria. It is released when the outer membrane of these bacteria is disrupted, which can occur during cell lysis or cell division.
Gram-negative bacteria possess a unique structure characterized by an outer membrane containing LPS. When the bacterial cell lyses or divides, the outer membrane is disrupted, leading to the release of endotoxin into the surrounding environment. Endotoxin can trigger inflammatory responses in the host organism, leading to various symptoms and complications.
The other choices, (i) starved for iron and (iii) cells are lysogenic for the beta phage, are not directly associated with the release of endotoxin. Starvation for iron may affect bacterial growth and metabolism but does not directly trigger the release of endotoxin. Lysogeny with the beta phage does not typically result in the release of endotoxin.
Therefore, the correct statement is that endotoxin is released when gram-negative pathogens lyse or divide (ii).
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PLEASE HELP WILL MARK BRAINLY
1. If a cube has 2cm sides and a mass of 10 g, what would it's density be?
A. 0.8 g/cm3
B. 1.25 kg
C. 1.25g/cm3
D. None of the above
2.If a cube has sides of 1.5 cm, and a mass of 15 g, would it float or sink in water?
A. float
B. Sink
3. A material with a melting point of 25C would be a solid at 15C?
A. True
B. False
4. A material with a Chemical Symbol of CO is an element.
A. True
B. False
Answers
Answer:magine 2 cubes. ... One cube is made out of gold and has a mass of 19.3 grams. ... Gold has a density of 19.3 grams per cubic centimeter, that is, 19.3 g/cm3 or 19.3 g cm-3 ... If you weigh 1.00 mL of liquid water it will have a mass of about 1 g so its ... They are both less dense than water so they will also float on top of water .
Explanation:
α particles are equivalent to the nuclei of which element?
Proton · Electron · Neutron · Helium nucleus · Alpha particle
Answers
Alpha particles are equivalent to the nuclei of helium atoms, which consist of two protons and two neutrons.
Alpha particles are positively charged and have a relatively large mass compared to other types of ionizing radiation, such as beta particles and gamma rays. They are typically emitted during the process of alpha decay, which occurs when a radioactive nucleus emits an alpha particle in order to become more stable.
Alpha particles can be stopped by a thin layer of material, such as a sheet of paper, and are generally less penetrating than other forms of ionizing radiation.
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The formula for ammonia is NH3.
Which is greater: the number of
molecules in one mole of
ammonia, or the number of atoms
in one mole of ammonia?
Answers
The number of molecules in one mole of ammonia and the number of atoms in one mole of ammonia are same which equals to 6.023 × 10²³.
Avogadro's principle:
"This law states that under the same conditions of temperature and pressure, equal volumes of different gases contain an equal number of molecules".
Avogadro's number is the number of units present in one mole of any substance is equal to 6.023 × 10²³. The units of the substance may be different according to its character, units may be ions, atoms, electrons or molecules.
According to Avogadro's rule the number of ions and the number of molecules present in one mole of NH₃ is 6.023 × 10²³.
Hence, the number of molecules in one mole of ammonia and the number of atoms in one mole of ammonia are same.
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why would evaporating the water not work for separating ethanol from water?
Answers
2. Describe the changes in bonding and hybridization of the carbon atoms that take place during the polymerization of styrene to form polystyrene.
Answers
During the polymerization of styrene to form polystyrene, the bonding and hybridization of the carbon atoms undergo significant changes.
In styrene, the carbon atoms are originally sp2 hybridized and form a conjugated system of double bonds in the aromatic ring. However, during the polymerization process, the double bonds in styrene undergo addition polymerization.As a result, the carbon atoms in polystyrene undergo a transformation in hybridization from sp2 to sp3. The double bonds break, and new sigma bonds are formed between the carbon atoms, leading to the formation of a long chain of repeating units.
This change in hybridization allows the carbon atoms in polystyrene to form stronger and more stable sigma bonds with neighboring carbon atoms or other substituents. Consequently, the structure of polystyrene becomes a three-dimensional network of carbon-carbon bonds throughout the polymer chainThe transition from an aromatic, conjugated system in styrene to a saturated, three-dimensional polymer structure in polystyrene is vital in the polymerization process, providing the desired properties and structural integrity to the resulting polymer.
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In a radio, ______ energy is transformed into ______ energy.
Answers
Answer:
In a radio, chemical energy is transformed into sound energy
GUYS PLEASE HELP ME IM TAKING A TEST. What is the number of moles in 1216 g Sr3(PO4)2?
Answers
What is the frequency of a red laser that has a wavelength of 676 mn
Answers
The frequency of a red laser that has a wavelength of 676 nm would be 4.43 x \(10^{14\) hertz.
Frequency of wavesThe frequency and wavelength of a wave are related by the following equation:
λf = c
Where λ is the wavelength of the wave in meters, f is the frequency in Hertz, and c is the speed of light in a vacuum.
in this case, λ = 676 nm = 6.76 x \(10^{-7\) m
c = 299,792,458 m/s
Making f the subject of the formula:
f = c/λ
= 299,792,458/6.76 x \(10^{-7\)
= 4.43 x \(10^{14\) hertz
In other words, the frequency of a red laser that has a wavelength of 676 nm would be 4.43 x \(10^{14\) hertz.
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name one cleaning compound you commonly used at home. Why do you use it commonly?
Answers
Answer:
Chlorine
Explanation:
Because this will remove dirt and stain and it will kill microorganisms that can cause diseases.
A prokaryotic cell does not have
А
a cell membrane.
B
genetic material.
C
a nucleus.
D
flagella.
Answers
Answer:
D
Explanation:
DISCUSSION QUESTIONS:
1) Distinguish how P-waves and S-waves travel differently with illustrations and
labels.
2) What type of seismic wave will reach a recording station 500 miles away from the epicenter first
Answers
Answer:
P-waves compression waves while S-waves are shear waves.
Explanation:
P- waves has the ability to travels through solid, liquid and gaseous medium while S-waves travels through only solid medium and restricted by liquid and gaseous medium. P-waves is a type of seismic wave that will reach first to the recording station as compared to S-waves because P-waves moves faster that S-waves that moves slower so that's why P-waves reach first on the recording station that is located 500 miles away.
The least abundant gas in the air is
a. Xenon, Xe
b. Oxygen, O2
c. Water, H2O
d. Nitrogen, N2
Answers
Answer:
A.
Explanation:
Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Xenon(Xe ) is the least abundant element on the earth. The correct option is option A.
What is element?Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.
Oxygen, water, and nitrogen are the most abundant molecule on the earth. Xenon is the least abundant amongst all given option. Xenon belongs to noble gas family. So, Xenon is not reactive at all. Xenon does not form any compound with any other element so its abundance on earth is very less.
Therefore, Xenon(Xe ) is the least abundant element on the earth. The correct option is option A.
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I MARK BRAINLIEST! IF YOU TOOK THIS EXAM AND KNOW THE ANSWER OR YOU JUST KNOW THE ANSWER IN GENERAl, PLZ HELP:
What will most likely happen when an air mass of low temperature exists above a water body at a higher temperature? (5 points)
a. Humidity of the air mass will decrease.
b. Heat will flow from the air mass to the water body.
c. Heat will transfer from the water to the air.
d. Air molecules closer to the water will become cooler.
Answers
Answer:
C) Heat will transfer from the water to the air
Explanation:
the pKa of NR2C(O)CH2CN is ?
Answers
The pKa of PhSCH2NO2 is around 8.5 at a pH of 7. However, the pKa value can change depending on the pH of the solution, with lower pH values resulting in a stronger acid and higher pH values resulting in a weaker acid.
The pKa of PhSCH2NO2 is a measure of the acidity of the molecule. The term pKa refers to the negative logarithm of the acid dissociation constant, which is a measure of the strength of an acid. The lower the pKa value, the stronger the acid is.
In the case of PhSCH2NO2, the pKa value can vary depending on the pH of the solution. At a pH of 7, which is neutral, the pKa of PhSCH2NO2 is around 8.5.
This means that at pH 7, only a small percentage of the molecules will be in the protonated form, and most will be in the deprotonated form.
However, if the pH of the solution is lower than the pKa value, the molecule will be mostly in the protonated form, and if the pH is higher, it will be mostly in the deprotonated form.
The pH value of a solution is a measure of the concentration of hydrogen ions (H+) present in the solution. A pH of 7 is neutral, while a pH lower than 7 is acidic and a pH higher than 7 is basic.
The pKa of a compound is a measure of its acidity, and it is the negative logarithm of the acid dissociation constant (Ka). The pH represents the concentration of hydrogen ions in a solution and ranges from 0 to 14.
A lower pH indicates a more acidic solution, while a higher pH indicates a more basic solution.
Regarding the compound PhSCH2NO2, it's important to note that specific pKa values are typically found in a database or determined experimentally. I am unable to provide the exact pKa value for this compound, as I don't have access to an appropriate database.
In general, pKa values help us understand the relative acidity or basicity of a compound and can be used to predict the behavior of that compound in different chemical reactions.
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Draw the stracture of 2-bromo-4-chloro-3, 3-dimethylhex-1-ene
Answers
answer :
this is the structure if you want it
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.
Answers
2NO(g) ⇌ N2(g) + O2(g)
According to the problem statement, 2 moles of NO were placed in a 1 dm^3 bottle and allowed to reach equilibrium, and at equilibrium, 1.2 moles of NO had dissociated. This means that the initial concentration of NO was:
[NO]initial = 2 mol / 1 dm^3 = 2 M
And the concentration of NO at equilibrium is:
[NO]equilibrium = (2 - 1.2) mol / 1 dm^3 = 0.8 M
Since the stoichiometry of the balanced equation is 2:1:1 for NO, N2, and O2, respectively, the equilibrium concentrations of N2 and O2 will also be 0.6 M.
The equilibrium constant (Kc) can be calculated using the equilibrium concentrations of the reactants and products, raised to the power of their stoichiometric coefficients. Therefore:
Kc = ([N2][O2]) / ([NO]^2)
Substituting the equilibrium concentrations into the equation, we get:
Kc = (0.6 M x 0.6 M) / (0.8 M x 0.8 M)
Kc = 0.5625
Therefore, the value of the equilibrium constant for the reaction at that temperature is 0.5625. Note that the units of Kc depend on the stoichiometry of the balanced equation. Since the stoichiometric coefficients are all 1, the units of Kc in this case are M^-1
which of the following accurately describes the ph scale? which of the following accurately describes the ph scale? the ph scale runs from 0 (neutral) to 14 (most acidic), with 7 as an average acidity level. the ph scale runs from 0 (most acidic) to 14 (neutral), with 7 as an average acidity level. the ph scale runs from 0 (most basic) to 14 (most acidic), with 7 as a neutral. the ph scale runs from 0 (most acidic) to 14 (most basic), with 7 as a neutral.
Answers
Answer:
The pH scale measures acidity of a substance. known as potential of hydrogen, it varies from 0 to 14 with 7 being the pH value of a neutral solution. Below 7 shows the substance is acidic in nature and above 7 is alkaline in nature. pH 0-3 are considered strong acids while pH 4-6 are weak acids. pH 8-10 are weak alkalines and pH 11-14 are strong alkalines. This is a general trend and there may be exeptions especially if the substance has a negative pH. However, it would not be covered likely unless you are doing university chemistry.
Compare and contrast the political system
(institutions, branches of government, electoral rules) of France
and Russia. How do they compare? What are the key distinguishing
features? What are the stre
Answers
Russia is a federation with a semi-presidential political system. The President is the head of state while the Prime Minister is the head of government. The Federal Assembly is a bicameral legislature that is made up of the State Duma (lower house) and the Federation Council (upper house).
The political system in Russia and the United States are different. In the US, it is a presidential system where the President is both the head of state and government, while in Russia, the President is the head of state while the Prime Minister is the head of government.
In the US, the Congress is made up of the Senate (upper house) and the House of Representatives (lower house) while in Russia, the Federal Assembly is made up of the State Duma (lower house) and the Federation Council (upper house).
The key distinguishing features between the political systems in Russia and the US include the role of the President, the structure of the legislature, and the nature of the judiciary. In Russia, the President has a lot of power and is able to appoint the Prime Minister and other members of the executive branch.
The judiciary is also less independent compared to that of the US. On the other hand, the US has a more balanced system of power between the three branches of government, with the judiciary being independent of the executive and legislative branches.
The strengths of the political system in Russia include a strong centralized government that is able to make quick decisions and a strong military. However, the lack of political pluralism and the weak judiciary system are key weaknesses of the system.
The US political system has a strong commitment to individual rights and democratic principles. However, the system is often characterized by gridlock and polarization between political parties, leading to slow decision-making and a lack of progress on important issues.
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Which element has 2 valence electrons and is in period 4?
A. Sodium B. Carbon C. Beryllium D. Calcium
Answers
Calcium (Ca) has 2 valence electrons and is found in period 4 of the periodic table.
How to explain thisIn each period, the number of valence electrons increases by one as we move from left to right. Since calcium is located in period 4, it means it has 4 energy levels, and the outermost shell contains 2 electrons.
Valence electrons are the electrons found in the outermost shell and are crucial for determining an element's chemical properties and reactivity. Calcium's 2 valence electrons allow it to readily lose those electrons to form a stable 2+ cation, making it an active participant in various chemical reactions.
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which of the following is a derived unit (a) kg ( b) meter ( c) kelvin ( d ) newton
Answers
Among the given options, the derived unit is Newton. Option d is correct.
Derived units are measure units that have been derived from more than one base unit. Also understood as the units derived from the fundamental units. They either lack dimension or are the products of base units, like derived unit of force is Newton. A total of 22 derived units exist. The basic 7 derived units are Length is meter(m), Mass is kg (kilogram) ,Time is s (second), Electric Current is A (Ampere) ,Thermodynamic Temperature is K (degrees Kelvin) ,Amount of Substance is mol (mole) and Luminous Intensity is cd (candela)
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Which of the following has the greatest
mass?
pls look at options
Answers
Answer:
C.) One mole of mercury
Explanation:
You can determine which has the greatest mass by identifying each of their atomic masses. The atomic mass represents the mass of an element per 1 mole.
Gold (Au): 196.97 g/mol
Mercury (Hg): 200.59 g/mol
Barium (Ba): 137.33 g/mol
In this case, one mole of mercury has the greatest mass.
You were given a 100. G wine sample to verify its age. Using tritium dating you observe that the sample has 0. 688 decay events per minute. Tritium has a half life of 12. 3 and fresh water exhibits 5. 5 decay events per minute per 100g. What year was the wine produced?.
Answers
Wine was produced 37 years ago (1984 as usual year 15,2021) that is shown in the calculations below.
Reaction rate is calculated using the formula rate = Δ[C]/Δt, where Δ[C] is the change in product concentration during time period Δt. The rate of reaction can be observed by watching the disappearance of a reactant or the appearance of a product over time.
The time can be represented as follows:
t= 2.303\∧ log A0/A
∧= 0.693/t 1/2
The rate of a reaction is proportional to the reciprocal of the time taken. Rate α 1 time Rate is inversely proportional to time. Units: s-1, min-1 etc.
The given parameters are as follows:
t1/2=12.3
A0=5.5
A=0.688
t= 2.303/(0.693/12.3) log (5.5/0.688)
t=36.9
t=37 years
Thus, wine was produced 37 years ago (1984 as usual year 15,2021)
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GIVING BRAINLIEST!
Calculate the concentration of a solution of sodium chloride if 15g are added to water to make a 200cm³ solution. The answer shoulsd be in units of g/dm³.
Answers
Answer:
75 g/dm³
Explanation:
The following data were obtained from the question:
Mass of solute (NaCl) = 15 g
Volume of solution = 200 cm³
Concentration (in g/dm³) =?
Next, we shall convert 200 cm³ to dm³. This can be obtained as follow:
1000 cm³ = 1 dm³
Therefore,
200 cm³ = 200 cm³ × 1 dm³ / 1000 cm³
200 cm³ = 0.2 dm³
Thus, 200 cm³ is equivalent to 0.2 dm³.
Finally, we shall determine the concentration of the solution as follow:
Mass of solute (NaCl) = 15 g
Volume of solution = 0.2 dm³
Concentration (in g/dm³) =?
Concentration (in g/dm³) = mass / volume
Concentration (in g/dm³) = 15 g /0.2 dm³
Concentration (in g/dm³) = 75 g/dm³
A sample of nitrogen (N2) gas in a 10.0L container has a
pressure of 1.0 atm at 297 K. Assuming ideal gas behavior,
what will the pressure be if the same amount of nitrogen
gas is put into a 5.0L container at 297 K?
Answers
Answer: The pressure of nitrogen will be 2.0 atm
Explanation:
According to ideal gas equation:
\(PV=nRT\)
P = pressure of gas = 1.0 atm
V = Volume of gas = 10.0 L
n = number of moles = ?
R = gas constant =\(0.0821Latm/Kmol\)
T =temperature =\(297K\)
\(n=\frac{PV}{RT}\)
\(n=\frac{1.0atm\times 10.0L}{0.0820 L atm/K mol\times 297K}=0.41moles\)
Now again using ideal gas equation :
\(P=\frac{nRT}{V}=\frac{0.41mol\times 0.0821Latm/Kmol\times 297K}{5.0L}=2.0atm\)
Thus pressure of nitrogen will be 2.0 atm
Which element is represented by the following Bohr model? *
p = 11
n 12
Answers
Answer:
A sodium atom.
Explanation:
A sodium atom contains 11 protons and 12 neutrons and its mass is 23.
Natural Causes of Climate Change:
Pick one cause of natural climate change. Explain what it is and how
it causes dimate change. What is the effect of the climate change?
Helpp plzzz
Answers
Answer:
cause of climate change: The earth's climate is affected and changed through a lot of natural causes like volcanic eruptions.
how it causes change: Volcanoes can be extremely dangerous to earth because it can impact climate change. During major explosive eruptions huge amounts of volcanic gas, aerosol droplets, and ash are injected into the stratosphere.
what is the effect of the change: Major eruptions alter the Earth's radiative balance because volcanic aerosol clouds absorb terrestrial radiation, and scatter a significant amount of the incoming solar radiation, an effect known as "radiative forcing" that can last from two to three years following a volcanic eruption.
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