The specific heat for the given sample will be 0.522 J/g°C
Q= mcΔT,
here Q is the heat energy absorbed,
m is the mass of the sample,
ΔT is the change in temperature.
Q= m*c*ΔT,
Q= m*c*(T2-T1)
since we have to find the specific heat capacity therefore,
c= Q*(T2-T1)/m
putting values,
c= 392/(65.3-42.1)*32.3
c= 392/23.2*32.3
c= 392/749.36
c=0.522 J/g°C
The specific heat capacity is the amount of heat absorbed by a unit mass of a material when it's temperature is increased by 1°C.
The S.I unit for Specific heat capacity is Joule per kelvin per kilogram.
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A 4.00g sample of gas is found to exert a pressure of 1.71 atm when confined in 3.60L container at a temperature of 24
Answer:
There are 0.311 moles of gas in the tank
Explanation:
Complete question
A 4.00g sample of gas is found to exert a pressure of 1.71 atm when confined in 3.60L container at a temperature of 241 K. Find the number of moles of the gas
Solution
As we know
\(PV = nRT\)
where P is the pressure of the gas in atm
V is the volume in liters
n is the number of moles
R is the gas constant = 0.08206 L·atm/K·mol
and T is the temperature in Kelvin
Substituting the given values in above equation, we get -
\(1.71 * 3.60 = n * 0.08206 * 241\\n = 0.311\)
There are 0.311 moles of gas in the tank
which of the following methods of making electricity results in dangerous radioactive waste
A. Solar energy
B. Nuclear energy
C. Geothermal energy
D. Wind energy
Answer:
B. Nuclear energy
Explanation:
arrange the following substances in order of increasing solubility in hexane, c6h14: ch2ohch2oh, c10h22, h2o
The order of increasing solubility in hexane, C6H14, would be: C10H22 > CH2OHCH2OH > H2O.
This is because C10H22 is a nonpolar molecule, making it highly soluble in hexane which is also nonpolar. CH2OHCH2OH has some polar character due to the -OH groups, but still has some nonpolar character from the carbon chain, making it less soluble in hexane than C10H22. Finally, H2O is highly polar and therefore not soluble in hexane which is nonpolar. Hexane is a hydrocarbon with the chemical formula C6H14. It is a colorless and odorless liquid with a relatively low boiling point, making it highly volatile and flammable. Hexane is primarily used as a solvent in various industries, including the production of rubber, leather, and pharmaceuticals. Hexane is obtained from crude oil and is typically produced through the refining process. It is a highly pure and stable solvent that is commonly used in laboratory settings for extraction and purification of compounds. It is also used as a cleaning agent for electronic components, as well as a component of certain adhesives and sealants.
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Do household fluid substances melt at the same rate?
Answer:
1) Different masses or densities. The rate at which a substance changes temperature is related to its mass. If 1 fluid ounce of ice cream is less dense than a fluid ounce of coffee, the ice cream will change temperatre more quickly.
The arrow in a chemical equation means _______
A. Sum
B. Produces
C. Diffrence
Answer: The answer is B
Explanation: The arrow means produces it is also known as yields
Example: 2H2 + O2 → 2H2O
The arrow → means that it yields
Hope this was helpful
Beryllium is classified as?
a) a transition metal
b) an alkaline earth metal
c) an alkali metal
d) a noble gas
Answer:
b
Explanation:
Beryllium is under Group 2, and group 2 are usually known as alkaline earth metals.
An electron initially in the n = 5 orbital of a hydrogen atom emits a photon with a wavelength of 1284 nm. Calculate the
final orbital, nf.
O a. 6
Ob. 3
Ос. 2
O d. 1
e. 4
Answer: 3
Explanation:
You want to use the Rydberg equation which is given by
\(E = -R_{H}(\frac{1}{n_{final}^2} - \frac{1}{n_{initial}^2})\)
where \(R_H = 2.18 \, \cdot 10^{-18} J\).
We are however given the wavelength instead of energy, and so we need to represent E in terms of its wavelength, and so we use \(E = \frac{hc}{\lambda}\). Remember that λ must be in meters in this formula. So we can divide 1284 nm by \(10^9\) to get the wavelength in meters. This gives \(\lambda = 1.284 \, \cdot 10^{-6}\) meters. Putting this all together we have
\(\frac{hc}{\lambda} = -R_{H}(\frac{1}{n_{final}^2} - \frac{1}{n_{initial}^2})\)
where
\(h = 6.626 \cdot 10^{-34} J\cdot s\\c = 2.998 \cdot 10^{8}\, m/s\\\lambda = 1.284 \cdot 10^{-6}\, m\\R_H = 2.18 \, \cdot 10^{-18} J\\n_{initial} = 5\\n_{final} = \, ?\)
If we plug in everything we should get roughly \(n_f = 3.00194\) but remember that orbitals must be a whole number and so you would round to the closest integer which gives \(n_f = 3.\)
You have two solutions, A and B. The pH of solution A is 6 and pH of solution B is 8. Which solution has more hydrogen ion concentration? Which of this is acidic and which one is basic?
As it is less than 7, solution A, with a pH of 6, is acidic, whereas solution B, with a pH of 8, is basic.
In contrast to solution B, which is basic in nature, acidic solution A has a higher concentration of hydrogen ions.
A is therefore an acid and B is a base.
How does pH work?
hydrogen's potential noun. the common logarithm of the reciprocal of the concentration of hydrogen ions in moles per cubic decimeter of solution; a measure of a solution's acidity or alkalinity. A pH of 7 refers to pure water, a pH of less than 7 to acid solutions, and a pH of more than 7 to alkaline solutions.
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As it is less than 7, solution A, with a pH of 6, is acidic, whereas solution B, with a pH of 8, is basic.
In contrast to solution B, which is basic in nature, acidic solution A has a higher concentration of hydrogen ions.
A is therefore an acid and B is a base.
How does pH work?
hydrogen's potential noun. the common logarithm of the reciprocal of the concentration of hydrogen ions in moles per cubic decimeter of solution; a measure of a solution's acidity or alkalinity. A pH of 7 refers to pure water, a pH of less than 7 to acid solutions, and a pH of more than 7 to alkaline solutions.
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the mass of an object in a given space is known as its
The mass of an object in a given space is known as its relativistic mass.
The system's mass as it will be determined by a scale just might be the relativistic mass, however, in some instances (such as the box above), this fact only holds true since this system must typically be at rest in order to be measured .
For instance, if an electron in such a cyclotron is traveling in circles at a relativistic velocity, its relativistic mass rather than its rest mass increases the mass of the cyclotron and electron system.
Therefore, The mass of an object in a given space is known as its relativistic mass.
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Which of the following explains why metals are able to be pounded, extruded, bent, and shaped without breaking?
Which of the following explains why nonmetals are typically harder and more brittle than metals?
Answer: Malleability
Explanation: Is because metals have mobile electrons in their s orbitals.
Hope this helps..
Answer:
The answer to this question is mobile electrons in s orbitals.
The answer to the following question on edg is directional electrons in p orbitals.
Explanation:
The diagram shows the cycling of matter in the interior of Earth.
Which statement correctly explains the cycling of matter in the interior of Earth?
Responses
The heat from Earth’s core causes material in the area under the crust to become less dense and rise, while more dense material sinks.
The heat from Earth’s core causes material in the area under the crust to become less dense and rise, while more dense material sinks.
The heat from Earth’s core causes material in the area under the crust to become more dense and rise, while less dense material sinks.
The heat from Earth’s core causes material in the area under the crust to become more dense and rise, while less dense material sinks.
The heat from Earth’s core causes material in the area under the crust to become less dense and sink, while more dense material rises.
The heat from Earth’s core causes material in the area under the crust to become less dense and sink, while more dense material rises.
The heat from Earth’s core causes material in the area under the crust to become more dense and sink, while less dense material rises.
The heat from Earth’s core causes material in the area under the crust to become more dense and sink, while less dense material rises.
Answer:
Explanation:
I think 'The heat from Earth's core causes material in the area under the crust to become denser and rinse, while less dense material sinks.
a Potassium atom has one valence electron and four occupied electron shells. Give the group number and period number of potassium in the periodic table(
HELP ASAP! 50 POINTS! Which type of electromagnetic radiation has a longer wavelength than visible light? (4 points) Gamma rays Infrared radiation Ultraviolet radiation X‒rays
Answer:Infrared radiation
Explanation:just took the test
The electromagnetic radiation that has a longer wavelength than visible light is Infrared radiation.
The electromagnetic spectrum is an arrangement of of electromagnetic waves in order of increasing frequency and energy. We must note the longer the wavelength, the farther it appears towards the left in the electromagnetic spectrum.
The visible spectrum spans between 400 nm - 700 nm in the electromagnetic spectrum. The electromagnetic radiation that has a longer wavelength than visible light is Infrared radiation.
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In a reaction, 42.6 g of chromium(iii) oxide reacts with 15.1 g of aluminum to produce chromium and aluminum oxide. if 29.1 g of chromium is produced, what mass of aluminum oxide is produced?
42.6 g of chromium(iii) oxide reacts with 15.1 g of aluminum to produce chromium and aluminum oxide. if 29.1 g of chromium is produced, then the mass of aluminum oxide is produced 14.6 g,
Here's how,
Cr2O3 + 2Al ⇄ Al2O3 + 2Cr.....(1) (take this equation 1)
∴ In the above chemical reaction, Aluminum oxide is produced,
Given, Mass of Chromium(iii) oxide = 42.6 g,
Mass of Aluminum = 15.1 g, and
Mass of Chromium = 29.1 g,
Hence, we have to find oxygen, before finding the mass of aluminum oxide.
∵ Mass of Cr2O3 = 42.6 g,
⇒ (29.1 × 2)+(O3) = 42.6
⇒ 58.2 + O3 = 42.6
⇒ O3 = 42.6 - 58.2 ⇒ - 15.6 g
Put O3 in equation (1), we get,
Now, put the atomic mass of O in equation 1, we get,
∴ Al2O3 ⇒ [(29.1 × 2) + {(-5.2) × 3}]
⇒ 14.6 g
Therefore, the Mass of Aluminum Oxide produced is 14.6 g.
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A 4.00 L balloon is filled with 0.297 moles of helium gas with a pressure of 0.910 atm. Calculate the temperature,in Kelvin, of the gas. (KEEP 3 SIG FIGS;DO NOT TYPE ANY UNITS)
Answer:
112 kelvin
Explanation:
Volume = 4.00L
no of moles = 0.297
Pressure = 0.910 atm
Temperature = ?
Given our R (Molar gas constant ) = 0.082
Given the following parameters , This question is based on IDEAL GAS LAW.
IDEAL GAS LAW = PV =nRT
\(PV = nRT\\Lets make T the subject of the formula\\T = \frac{PV}{nR} T = \frac{ 0.910 * 4.00}{0.397*0.082 }\\\\T = 3.64/0.032554\\T = 111.8142\\T = 112 Kelvin\\\)
if an elements first ionization is large what can you predict about its atomic radius, electron affinity and electronegativity
First ionization energy is the energy required to remove the outermost or highest energy electron from a neutral atom in a gaseous state
Elements that have high ionization energy have smaller atomic radii this is because they require more energy for them to lose an electron
the valence electrons in the outer shell are strongly pulled by the nucleus.
electron affinity is the amount of energy liberated when an electron is added to a neutral atom to form a negatively charged ion
The elements with higher ionization energy have a negative showing that they have the highest tas they will release massive energy if an electron is forced to enter their atoms.
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Why must a special saw be used when removing a cast?
A. Because it is very painful to have a cast removed.
B. Because a cast is made of material that requires a special saw.
C. Because a regular saw is not strong enough to cut the cast.
D. Because a regular saw might cut a person’s skin.
Which property of light does this diagram show?
please help me
16 1 point What is the decay rate of a sample of Oxygen-21 if the sample has 8.31x1017 atoms and a decay constant of 0.203/s? 4.09x1018Bq 1.69x10¹7Bq 0.203Bq 2.44x10-1⁹Bq Previous
decay rate of approximately 1.69x10^17 Bq (becquerels),
The decay rate of a radioactive sample is determined by the number of radioactive atoms present and the decay constant, which represents the probability of decay per unit of time.
To calculate the decay rate, we multiply the number of atoms in the sample by the decay constant. In this case, the sample has 8.31x10^17 atoms and a decay constant of 0.203/s. Multiplying these values gives a decay rate of approximately 1.69x10^17 Bq (becquerels), which represents the number of decays per second in the sample.
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define atom and give an example
Answer:
Many atoms consist of a positively charged nucleus composed of protons and neutrons surrounded by a negatively charged cloud of electrons. At its most basic level, an atom is any particle of matter that contains at least one proton. ... Here are some examples of atoms: Neon (Ne) Hydrogen (H)
Explanation:
carbon monoxide and nitrogen monoxide react to produce carbon dioxide and nitrogen gas. if the system contains platinum, then less energy is required for the reaction to occur. which term best describes the role of platinum in the system?
The term "catalyst" best describes the role of platinum in the system.
Let us explore the role that platinum plays as a catalyst. Catalysts are defined as substances that speed up the rate of chemical reactions without changing their own mass or chemical properties in the process.
The amount of energy required to activate a process is reduced when catalysts are added. It is stated in the question that if the system incorporates platinum, then the amount of energy that is required is going to be lower. Therefore, platinum is functioning as a catalyst in this situation because it is lowering the required activation energy of the reaction.
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in xps the energy of the photoelectron is dependent on the binding energy of the sample. is this also true for an auger electron? explain why or why not.
In X-ray photoelectron spectroscopy (XPS), the energy of the emitted photoelectron is dependent on the binding energy of the sample. However, this is not necessarily true for an Auger electron.
In Auger electron spectroscopy (AES), an atom is ionized by an incident X-ray photon, and the resulting core hole is filled by an outer-shell electron. This process releases energy, which can be detected as an Auger electron. The energy of the Auger electron is dependent on the energy released in the filling of the core hole, rather than the binding energy of the sample.
The energy released in the filling of the core hole depends on the specific electronic configuration of the atom, rather than the binding energy of the sample. Therefore, the energy of an Auger electron is not necessarily dependent on the binding energy of the sample, but rather on the specific electronic transitions that occur during the Auger process.
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What are the problems of turbid water for aquatic plants?
Answer:
Turbidity affects the growth rate of algae (micro-aquatic plants) and other aquatic plants in streams and lakes because increased turbidity causes a decrease in the amount of light for photosynthesis. Turbidity can also increase water temperature because suspended particles absorb more heat.High levels of turbidity can affect aquatic life in several ways.
Too much turbidity might make it difficult for plants to complete photosynthesis, which in turn affects the amount of dissolved oxygen.Fish cannot see well in turbid water making finding food difficult.High turbidity reduces the penetration of sunlight into water and can limit photosynthesis and hence the growth of aquatic plants.Explanation:
Turbidity is the measure of relative clarity of a liquid. The higher the intensity of scattered light, the higher the turbidity. Material that causes water to be turbid include clay, silt, very tiny inorganic and organic matter, algae, dissolved colored organic compounds, and plankton and other microscopic organisms
You have sweetened iced tea with sugar, and ice cubes are present, How many phases are present?
The number of phases present is two.
Phases present in a systemThere are two phases present in sweetened iced tea with sugar and ice cubes. The first phase is the liquid phase of the tea, which contains water, sugar, and other dissolved substances.
The second phase is the solid phase of ice cubes, which contains solid water molecules. These two phases are in contact with each other, and the sugar molecules in the liquid phase are dissolved in the water molecules.
The ice cubes, being a solid, do not dissolve in the liquid phase but coexist with it in the same container.
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you couldn't hear a dump truck driving through a nitroglycerin plant
It is very dangerous to hear anything loud or cause any impact or shock while working with nitroglycerin because it can cause an explosion. Therefore, you cannot hear a dump truck driving through a nitroglycerin plant due to the danger it poses to the employees and the facility.
Nitroglycerin is an explosive material that is highly sensitive to impact, heat, or friction. It is also a primary explosive, which means that it can detonate by itself without any external stimulus. This property makes nitroglycerin one of the most dangerous substances on the planet. As a result, it is always stored in a safe location and transported with the utmost care and security to prevent accidental explosions.
When working with nitroglycerin, it is essential to follow strict safety protocols and procedures to ensure the safety of the employees and the facility. Any loud noise or impact can cause a shock wave that can trigger an explosion. Therefore, it is vital to maintain a quiet environment to avoid any unnecessary risks or accidents.
You cannot hear a dump truck driving through a nitroglycerin plant because it is incredibly dangerous to do so. The vibration and noise generated by the truck can cause a shock wave that can trigger an explosion. Therefore, the facility's employees must maintain a quiet environment and avoid any loud noises or vibrations that can cause an accident or explosion.
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A 3. 8
g sample of sodium hydrogen carbonate is added to a solution of acetic acid weighing 10. 5
g. The two substances react, releasing carbon dioxide gas to the atmosphere. After the reaction, the contents of the reaction vessel weigh 11. 7
g. What is the mass of carbon dioxide released during the reaction?
The mass of carbon dioxide released during the reaction is 2.6 grams.
To determine the mass of carbon dioxide released during the reaction between sodium hydrogen carbonate (NaHCO3) and acetic acid (CH3COOH), we need to calculate the difference in mass before and after the reaction.
Before the reaction:
Mass of NaHCO3 = 3.8 g
Mass of acetic acid = 10.5 g
Total mass before the reaction = Mass of NaHCO3 + Mass of acetic acid = 3.8 g + 10.5 g = 14.3 g
After the reaction:
Mass of the contents of the reaction vessel = 11.7 g
To find the mass of carbon dioxide released, we calculate the difference in mass:
Mass of carbon dioxide released = Total mass before the reaction - Mass of the contents of the reaction vessel
= 14.3 g - 11.7 g
= 2.6 g
Therefore, the mass of carbon dioxide released during the reaction is 2.6 grams.
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How you find a unknown element (just with the atomic emission spectrum)
How many grams of silver chromate will precipitate when 150. mL of 0.500 M silver nitrate are added to 100. mL of 0.400 M potassium chromate?
Approximately 7.98 grams of silver chromate will precipitate when 150 mL of 0.500 M silver nitrate is added to 100 mL of 0.400 M potassium chromate.
To determine the amount of silver chromate that will precipitate when 150 mL of 0.500 M silver nitrate is added to 100 mL of 0.400 M potassium chromate, we need to identify the limiting reagent and calculate the corresponding amount of silver chromate formed.
First, we can calculate the number of moles of silver nitrate and potassium chromate using their respective concentrations and volumes:
Moles of silver nitrate = concentration × volume = 0.500 M × 0.150 L = 0.075 mol
Moles of potassium chromate = concentration × volume = 0.400 M × 0.100 L = 0.040 mol
From the balanced chemical equation:
2 AgNO3 + K2CrO4 → Ag2CrO4 + 2 KNO3
We can see that the stoichiometric ratio between silver nitrate and silver chromate is 2:1. Therefore, the moles of silver chromate formed will be half the moles of silver nitrate used:
Moles of silver chromate formed = 0.075 mol / 2 = 0.0375 mol
Finally, we can calculate the mass of silver chromate using its molar mass:
Mass of silver chromate = moles × molar mass = 0.0375 mol × (2 × 107.87 g/mol) = 7.98 g
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when chlorine gains an electron to have 8 valence electrons and become stable, will it increase, decrease or stay the same in terms of the atomic radius
Answer:
It becomes an ion
Explanation:
The element it took from becomes a positive ion
And chlorine becomes a negative ion
Suppose I have enough ingredients to make 25 cookies, but when I go to bake them, | only get 18. What percent yield did I obtain?
You obtained a 72% yield. Suppose I have enough ingredients to make 25 cookies.
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