write a balanced nuclear equation for the following: the nuclide radon-222 undergoes alpha emission to give polonium-218 .
Answers
A nuclear equation is a way to represent a nuclear reaction using chemical symbols and nuclear symbols. In this case, the nuclide radon-222 is undergoing alpha decay, which means it is emitting an alpha particle (which is a helium nucleus, with two protons and two neutrons).
The resulting product is polonium-218, which has two fewer protons and two fewer neutrons than the original radon-222.
The balanced nuclear equation for this reaction would be:
^222Rn --> ^218Po + ^4He
This equation shows that one radon-222 nucleus is turning into one polonium-218 nucleus and one alpha particle (which is also known as a helium-4 nucleus). The equation is balanced because the total number of protons and neutrons on each side of the equation is the same.
Overall, nuclear equations are a useful tool for understanding and predicting nuclear reactions, and alpha decay is one of several types of nuclear decay that can occur.
When radon-222 undergoes alpha emission, it releases an alpha particle and transforms into polonium-218. An alpha particle consists of 2 protons and 2 neutrons, which can be represented as a helium-4 nucleus (He-4). Here's the balanced nuclear equation for this process:
Rn-222 (radon-222) → Po-218 (polonium-218) + α (alpha particle)
In terms of atomic mass and atomic numbers, we can also represent it as:
²²²₈₆Rn → ²¹⁸₈₄Po + ⁴₂He
This equation demonstrates that the mass and atomic numbers are conserved during the alpha emission process.
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Related Questions
Explain how you could find the mass and weight of an object on Earth, and the mass and weight of the same object on the moon. How would mass and weight be similar and different in these two places?
Answers
Answer:
mass of a particular object remains the same where ever it is placed, the mass will remain the same whether the object is on the moon or earth, unlike weight which will change.
Weight is affected by gravity. Therefore it is dependent on gravity or directly proportional to the force of gravity.
weight = mass × gravity
The gravity on earth is much larger than the gravity on the moon. Therefore the weight of an object weighs heavier on earth than on the moon. The object when placed on the moon will have a lower weight.
The difference is that the weight of the object on the moon will be lower than the weight of the object on earth.
The similarity is that the mass of an object will remain the same, regardless if it's placed on the moon or earth.
Hope this helps.
How is enthalpy related to the spontaneity of a reaction?
1. ΔH > 0 contributes to spontaneity.
2. ΔH < 0 contributes to spontaneity.
3. ΔH = 0 contributes to spontaneity.
4. ΔH does not affect spontaneity.
Answers
2. ΔH < 0 contributes to spontaneity, related to the spontaneity of a reaction.
Enthalpy (ΔH) is a measure of the energy of a system and can be used to predict whether a reaction is spontaneous or not. If the enthalpy of a reaction is negative (ΔH < 0), then the reaction is spontaneous. This is because the system is releasing energy, meaning that the reaction is more likely to proceed on its own without any external input. Therefore, a reaction with a negative enthalpy (ΔH < 0) is more likely to be spontaneous than a reaction with a positive enthalpy (ΔH > 0).
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1Propanol is combusted to provide heat The reaction and the enthalpy for the reaction are shown below Below is a list of sentences that describe a chemical reacsion Choose all of the sentences that apply to the above reaction Check all that apply. sharing gs ols View Available Hintls) This chemical reaction transfers heat tomte surroundings to the system This process is endothermic The enthalpy for 2GHrOA(1) + 9Oj (g) ? 60,(g) + 8H20(1) is 4 D42 kJ This process is exothermic The enthalpy for 2C4 H OH)+90()+6C02(8)+SH20(1) is 4.042 kJ This chemical reaction tansters heat from the system to the suroundings The enthalpy for 20,H,OH()+90 (s) -+6C02(s)+ 8H 0(1)s 2.021 k The enthalpy for 2C H:OH()+90()+ 6C0,(g)+8H,0(1) is 2.021
Answers
The combustion reaction of propanol, represented as 2C₄H₁₀(1) + 13O₂(g) → 8CO₂(g) + 10H₂O(1), involves the transfer of heat from the surroundings to the system. This exothermic process releases energy, as indicated by the negative enthalpy value of -442 kJ.
The combustion of propanol results in the formation of carbon dioxide (CO₂) and water (H₂O), while consuming oxygen (O₂) in the process.
This reaction is commonly used to provide heat in various applications, such as heating systems and fuel combustion.
By understanding the thermodynamics of this reaction, it becomes evident that it releases a substantial amount of energy in the form of heat, making it a valuable source of warmth and power.
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____ are small components typically made out of aluminum with fins that help to dissipate heat.
a.
ACs
c.
Heat buses
b.
Fans
d.
Heat sinks
Answers
Heat Sinks are small components typically made out of aluminum with fins that help to dissipate heat.
Heat sinks are often composed of CNC-machined copper or aluminum, and they contain heat sink fins or pins that enhance the component's surface area to aid in the transmission of heat to the surrounding fluid.
A part known as a heat sink facilitates heat transfer away from a hot device. It accomplishes this by increasing the device's operating surface area and the volume of low-temperature fluid that passes through it.
The main purpose of heat sinks is to increase the surface area of an electronic component that is in direct contact with a coolant. This will enable more heat to be easily dispersed, lowering the operating temperature of the device.
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what family and group nitrogen and phosphorus in?? I know they are both non-metals, just want to know the name, thanks
Answers
Nitrogen group element, any of the chemical elements that constitute Group 15 (Va) of the periodic table. The group consists of nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), bismuth (Bi), and moscovium (Mc).
They are also known as reactive metals !
J. j. thomson studied cathode ray particles (electrons) and was able to measure the mass/charge ratio. his results showed that?
Answers
His results showed that matter included particles much smaller than the atom.
J. J. Tomson concluded that atoms are divisible and that the corpuscles are their building blocks.
Atoms are made up of smaller particles.
J. J. Thomson discovered the electron ( the negative charges of the atom) in 1897.
His "plum pudding" model (1904) suggested: the electrons are embedded in the positive charge and evenly distributed throughout the entire atom.
With this model, he abandoned his earlier hypothesis that the atom was composed of immaterial vortices.
Later, scientist Rutherford demonstrate that J.J Thompson's Plum Pudding model was not accurate.
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which pair of compounds will not form a buffer in the solution? group of answer choices nacl, hcl h3po4, kh2po4 nh3, nh4cl h2so3, khso3
Answers
Among the given pairs of compounds, the pair of compounds that will not form a buffer in the solution is NaCl and HCl. A buffer solution is an aqueous solution that has a highly stable pH.
Buffer solutions consist of weak acids or weak bases and their respective conjugate bases or conjugate acids. Buffer solutions can regulate the pH of a reaction or a solution, which is why they are used in a variety of laboratory settings. The buffer solution has the following characteristics: It has a constant pH, even though there is an addition of a small amount of acid or base.
A buffer solution has a weak acid or weak base, with its conjugate base or acid. These conjugate acid-base pairs are capable of neutralizing small amounts of either an acid or base. When it comes to identifying the buffer solution, we need to identify the buffer pairs.
Therefore, NaCl and HCl will not form a buffer in the solution.
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120g of C₂H, react with 288g of O₂, What is the limiting reactant? How many grams of water can be produced? How many grams of excess? If 130 grams of water are actually produced, what is the percent yield?
Answers
The percentage yield is equal to 200.6%.
The balanced equation for the given chemical reaction is :
2C2H + 5O2 → 4CO2 + 2H2O
Let's find the limiting reagent:
Mass of C2H = 120 g
Mass of O2 = 288 g
Molar mass of C2H = 26 g/mol
Molar mass of O2 = 32 g/mol
The number of moles of C2H is equal to:
120 g × 1 mol/26 g = 4.62 mol
The number of moles of O2 is equal to:
288 g × 1 mol/32 g = 9 mol
According to the stoichiometry of the balanced equation, 2 moles of C2H react with 5 moles of O2, so:
If 4.62 moles of C2H is used, then the required amount of O2 would be:
5/2 × 4.62 mol = 11.6 mol
We only have 9 mol of O2 which means it is the limiting reagent.
C2H is the excess reagent.
Let's find the mass of water produced:
According to the stoichiometry of the balanced equation,2 moles of H2O is produced per 2 moles of C2H2 moles of H2O is produced per 5 moles of O2If 9 mol of O2 is used, the number of moles of water produced would be:
2/5 × 9 mol = 3.6 mol
The mass of water produced is equal to:
3.6 mol × 18 g/mol = 64.8 g
Therefore, 64.8 g of water can be produced.
The amount of excess reagent is equal to:
4.62 mol - 2/2 × 9 mol = 4.62 - 9
= -4.38 mol
C2H is the excess reagent and it is not possible to have negative amount of a substance.
So, we assume that there is no excess reagent.
If 130 grams of water is produced, then the percentage yield is equal to:
Percent yield = actual yield/theoretical yield × 100
Theoretical yield is equal to 64.8 g
Actual yield is equal to 130 g
Percent yield = 130/64.8 × 100
= 200.6%
Therefore, the percentage yield is equal to 200.6%.
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a liquid is boiled in a beaker until all of the liquid has evaporated. a powdery substance remains in the beaker. which does this indicate about the original liquid
ASAP PLEASE IM LITERALLY IN THE EXAM RN
Answers
balance the following equation: NaCI + F2 -> NaF + CI2
Answers
Answer:
2NaCl + F2 -> 2NaF + Cl2
Explanation:
Answer:
2NaCl +F2 = 2NaF + Cl2
reactant product
Na=2 Na=2
Cl=2 Cl=2
F=2 F=2
What group of elements is commonly used in jewelry and construction?
a. Alkali Metals b. Halogens .c.Noble gases d. Transition metals
Answers
Answer:
A. Alkaline Metals
Explanation:
I majored in Chemistry
how are decomposers in a forest and kelp forest ecosystem similar and different)
Answers
Salt is a common example of a(n) _____________ bond, while Water is a common example of a(n) _____________ bond.
Answers
Covalent bonds
Answer:
salt is ionic bond and water is Polar covalent bond
Explanation:
Explain why the process of dissolution can be exothermic or endothermic (heat of solution) with different solutes
Answers
Answer:
The process of dissolving is exothermic when more energy is released when water molecules “bond” to the solute than is used to pull the solute apart. Because more energy is released than is used, the molecules of the solution move faster, making the temperature increase.
Project the image Endothermic Dissolving.
The process of dissolving is endothermic when less energy is released when water molecules “bond” to the solute than is used to pull the solute apart. Because less energy is released than is used, the molecules of the solution move more slowly, making the temperature decrease.
What if a small amount of air leaked back into the flask through the tightened screw clamp as the flask assembly was cooling? would your calculated value for the molar mass of air be too high, too low, or would there be no effect? explain
Answers
The measured volume of hydrogen gas will be too high.
The volume of hydrogen is measured by collecting the gas over water. The volume of the gas is measured as the volume of water displaced by the gas in an inverted container.
When air leaks into the graduated cylinder, more volume of water is displaced hence a higher volume of hydrogen gas is measured.The calculated molar volume of hydrogen will be too high as a result of this error
The gas being recorded during the experiment would not only include hydrogen gas, but the air that leaked into the eudiometer tube as well. This leads to the increase in the volume of hydrogen gas which will be too high.
Since the volume of hydrogen is too high, therefore the calculated molar volume of hydrogen would also be too high.
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Can someone tell me how to identify the number of significant figures?
I solved a molarity word problem and I got the answer 1.138 moles. I need to find the number of significant figures for this number. If you could use 1.138 as an example, that'd be great.
Answers
Answer:
Non-zero digits are always significant.
Any zeros between two significant digits are significant.
A final zero or trailing zeros in the decimal portion ONLY are significant. If a number ends in zeros to the right of the decimal point, those zeros are significant.
Explanation:
1.138 has 4 significant figures, which are 1, 1, 3 and 8. The numbers after the decimal point are decimals and are significant figures.
a reaction mechanism for the destruction of ozone, o3(g), is represented above. in the overall reaction, no(g) is best described as
Answers
A reaction mechanism for the destruction of ozone, O₃(g), in the overall reaction, NO(g) is best described as the catalyst.
The reaction for the destruction of the ozone is given as follows:
NO + O₃ ----> NO₂ + O₂ SLOW STEP
NO₂ + O ----> NO + O₂ FAST STEP
the overall reaction is expressed as follows :
O₃ + O -----> 2O₂
In the process of the destruction of ozone , the NO acts as a catalyst. A catalyst are the substance which used to reduce the activation energy of the chemical reaction. catalysis increase the rate of the chemical reaction.
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How would you describe the elements from Group 1 to Group 12 in the periodic
table?
Answers
Answer:
Excluding hydrogen in group 1, metals
Explanation:
All the elements from group 1 to 12, excluding hydrogen at the top of group 1 are all metals
Silver and sulfur are combined to form 65.0 g silver sulfide. How many atoms of silver are necessary to do this?
Answers
3.206 x 10^23 atoms of silver are required to form 65.0 g of silver sulfide.
Steps
To determine how many atoms of silver are necessary to form 65.0 g of silver sulfide, we first need to calculate the number of moles of silver sulfide present in 65.0 g of the compound using its molar mass.
The molar mass of silver sulfide (Ag2S) can be calculated by summing the atomic masses of its constituent atoms:
Molar mass of Ag2S = (2 x atomic mass of Ag) + atomic mass of S
= (2 x 107.87 g/mol) + 32.06 g/mol
= 243.8 g/mol
Now we can calculate the number of moles of Ag2S present in 65.0 g of the compound:
Number of moles of Ag2S = mass of Ag2S / molar mass of Ag2S
= 65.0 g / 243.8 g/mol
= 0.2665 mol
From the chemical formula of silver sulfide (Ag2S), we know that 2 moles of silver are required to form 1 mole of Ag2S. Therefore, we can use this stoichiometric ratio to calculate the number of moles of silver required:
Number of moles of Ag = 2 x number of moles of Ag2S
= 2 x 0.2665 mol
= 0.5330 mol
Finally, we can use Avogadro's number (6.022 x 10^23) to convert the number of moles of silver to the number of atoms of silver:
Number of atoms of Ag = number of moles of Ag x Avogadro's number
= 0.5330 mol x 6.022 x 10^23 atoms/mol
= 3.206 x 10^23 atoms
Therefore, 3.206 x 10^23 atoms of silver are required to form 65.0 g of silver sulfide.
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What are the 3 hazards in HACCP?
Answers
Hazard Analysis and Critical Control Points (HACCP) is a systematic approach to identifying and controlling potential hazards in the food production process. The goal of HACCP is to ensure the safety and quality of food products by identifying and controlling any potential hazards that could cause illness or injury to consumers.
There are three main types of hazards that are considered in a HACCP plan: biological, chemical, and physical hazards.
Biological hazards: These include microorganisms, such as bacteria, viruses, and parasites, as well as natural toxins and allergens. These hazards can cause food poisoning and other illnesses if not properly controlled. For example, the presence of E. coli and Salmonella in food products can cause serious health problems if consumed.
Chemical hazards: These hazards include pesticides, cleaning chemicals, and other contaminants that can be present in food products. They can cause illness or injury if consumed in large enough quantities. For example, the presence of heavy metals such as lead and mercury in food can cause serious health problems if consumed.
Physical hazards: These hazards include foreign objects, such as broken glass, metal fragments, or plastic pieces, that can be present in food products. These hazards can cause injury if consumed. For example, a piece of metal in a can of food can cause serious injury if consumed.
It is important for food producers to identify and control these hazards in order to ensure the safety and quality of their food products. HACCP plans are designed to do just that by identifying potential hazards and implementing controls to prevent them from occurring.
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Which element is heavier oxygen or carbon?
Answers
Answer:
Oxygen
Explanation:
From the periodic table, you can see that the atomic mass of Oxygen is 15.999 (16), however, Carbon's mass is 12.011 (12).
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A student wanted to study the effect of temperature on algae levels in a
local stream. Which items are most useful for gathering data and most
appropriate for communicating the results of her observations?
Select one:
Microscopes and written descriptions of weather patterns
Research on the Internet and videotapes of water samples
pH strips and written observations of stream water
Test tubes, thermometers, and graphs of results
Answers
Answer:
pH strips and written observations of stream water
Explanation:
1.0 l of 1.0 m pb(no3)2 and 1.0 l of 1.0 m kcl are mixed together. what is the concentration of pb2 ions that remain after the precipitation reaction is complete? assume that the final volume of the solution is 2.0 l.
Answers
Concentration of Pb will be 0.25 M after precipitation reaction.
\(Pb(NO_{3} )_{2}\) \(\rightarrow\) \(Pb_} ^{2+}\)+\(2NO_{3} ^{-}\)
Lead Nitrate will form Pb ions and nitrate ion. It will react with KCl and perform precipitation reaction.
\(PbCl_{2}\) will precipitate.
The term 'precipitation reaction' can be defined as “ a chemical reaction occurring in an aqueous solution where two ionic bonds combine, resulting in the formation of an insoluble salt”. These insoluble salts formed in precipitation reactions are called precipitates.
Moles of Pb= 1*1 = 1 mole
Moles of Cl= 1*1= 1 mole
So, for 2 moles of Cl 1 mole of Pb will precipitate.
so only 0.5 mole will reacts
so Moles left= 0.5 moles
Volume= 2.0 L
Concentration= \(\frac{0.5}{2}\)= 0.25 M
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The effective multiplication factor of a reactor is 0.94. (a) what is the reactivity of the reactor? (b) what change in core reactivity would be required to make the reactor critical?
Answers
The effective multiplication factor of a reactor is 0.94. a) reactivity =0.0638, b)k=1
What is reactivity ?
responsiveness as a quality or state. Chemistry. the similarity between one atom, molecule, or radical's capacity to chemically interact with another atom, molecule, or substance.
Reactor: What is it?
Reactor: A container or piece of machinery utilised in chemical engineering to carry out chemical reactions for study or manufacturing.
(a) The multiplicative efficiency is k=0.94.
Rho = frac k-1 k = -0.0638 is the reactivity.
(b) K = 1, meaning that the reactor must have a higher core reactivity in order to reach criticality.
Consequently, k=0.94 is the actual multiplication factor.
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The value of the reaction quotient Q, for the cell
Zn(s)∣Zn 2+
(0.01 M)∥Ag +
(1.25 M)∣Ag(s) is_________.
Answers
The given cell is a galvanic cell or a voltaic cell. The value of the reaction quotient Q can be found using the following formula:Q = [Ag⁺] / [Zn²⁺]where, [Ag⁺] = concentration of Ag⁺ in the cathode half-cell = 1.25 M[Zn²⁺] = concentration of Zn²⁺ in the anode half-cell = 0.01 M
The value of the reaction quotient Q can be calculated as follows:Q = [Ag⁺] / [Zn²⁺] = 1.25 / 0.01 = 125Therefore, the value of the reaction quotient Q, for the cellZn(s)∣Zn 2+(0.01 M)∥Ag +(1.25 M)∣Ag(s) is 125.The reaction occurring in the cell can be represented as follows:Zn(s) + 2Ag⁺(aq) → Zn²⁺(aq) + 2Ag(s)At the anode (oxidation half-reaction):Zn(s) → Zn²⁺(aq) + 2e⁻At the cathode (reduction half-reaction):2Ag⁺(aq) + 2e⁻ → 2Ag(s)Overall balanced cell reaction: Zn(s) + 2Ag⁺(aq) → Zn²⁺(aq) + 2Ag(s)Hence, the value of the reaction quotient Q, for the given cell is 125.
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What are the differences between acetic acid and ethanoic acid?
Answers
Answer:
that acetic acid is the common name, whereas ethanoic acid is the chemical name given by IUPAC for the same compound.
Which material would most likely contribute to humus out of basalt, granite, grass, and salt
Answers
Answer:
basalt
Explanation:
it’s rough on skin
he variable part of an amino acid is the __________. a. amino group b. acid group c. backbone d. carbon bond e. side chain
Answers
The variable part of an amino acid is the e. side chain.
What is the distinguishing component of an amino acid?The variable part of an amino acid is known as the side chain or R-group. Amino acids are the building blocks of proteins, and each amino acid consists of a central carbon atom (alpha carbon) bonded to four groups: an amino group (NH2), a carboxyl group (COOH), a hydrogen atom (H), and the side chain.
The side chain is responsible for the unique properties of each amino acid and determines its chemical behavior and interactions within a protein structure.
The side chain plays a crucial role in determining the protein's structure, function, and interactions with other molecules. It can be hydrophilic (water-loving), hydrophobic (water-repellent), or charged, and these characteristics influence how the amino acid interacts with its environment. The side chain's size, shape, and chemical properties dictate the folding and stability of the protein, as well as its ability to interact with other proteins, nucleic acids, or small molecules. Therefore, understanding the side chain's nature is fundamental to comprehending the complex structures and functions of proteins.
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What is the awnser to question
Answers
How does Avogadro's number relate to a mole?
A. Avogadro's number is used to measure mass, and a mole is used
to count particles.
B. A mole is a larger amount than Avogadro's number.
C. Avogadro's number represents the number of particles in one
mole.
O
D. Avogadro's number applies to any item, but a mole can only be
used to count atoms.
Answers
Answer:
C.) Avogadro's number represents the number of particles in one
mole.
Explanation:
Considering the definition of Avogadro's number, the correct answer is option C. Avogadro's number represents the number of particles in one mole.
Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole.
Avogadro's number represents a quantity without an associated physical dimension, so it is considered a pure number that allows describing a physical characteristic without an explicit dimension or unit of expression.
Avogadro's number applies to any substance.
Finally, the correct answer is option C. Avogadro's number represents the number of particles in one mole.
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