Zirconium - 96 isotope is formed from the beta decay of zirconium-97 , Option C is the correct answer .
What are Isotopes ?Atoms are composed of a cloud of electrons surrounding a dense nucleus that is 100,000 times smaller and comprised of protons and neutrons.
The number of protons(i.e., atomic number, "Z") determines the element.
Isotopes are atoms of the same element that have the same number of protons (i.e., atomic number, "Z") but a different number of neutrons, meaning that their mass number, "A", varies.
Naturally occurring zirconium (⁴⁰Zr) is composed of four stable isotopes
One very long-lived radio isotope (⁹⁶Zr), a primordial nuclide that decays via double beta decay with an observed half-life of 2.0×10¹⁹ years
The second most stable radioisotope is ⁹³Zr, which has a half-life of 1.53 million years.
Thirty other radioisotopes have been observed.
All have half-lives less than a day except for ⁹⁵Zr (64.02 days), ⁸⁸Zr (83.4 days), and ⁸⁹Zr (78.41 hours).
The primary decay mode is electron capture for isotopes lighter than ⁹²Zr
and the primary mode for heavier isotopes is beta decay.
Therefore Zirconium - 96 isotope is formed from the beta decay of zirconium-97 , Option C is the correct answer .
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How would a scientist classify a centipede? 12 points!!! pls help.
A. Arthropod
B. Amphibian
C. Mammal
D. Reptile
Bases contain hydroxide, which is a
What is the repeating unit in this polymer? −CH2−CCl2−CH2−CCl2−CH2−CCl2−
The repeating unit in this polymer is −CH2−CCl2 (i.e., Methylene-Dichlorocarbene).
What is a polymer?In chemistry, a polymer is a molecule and/or structure composed of two or more repeating units.
These repeating units can be very reactive in a single composition or form a polymer when bound.
In conclusion, the repeating unit in this polymer is −CH2−CCl2 (i.e., Methylene-Dichlorocarbene).
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Calculate the volume of a 1.50M HCl solution that contains 0.920 mol of HCI. (SHOW WORK)
Answer:
= 0.613dm^3
Explanation:
Data:
Molarity, M = 1.50M
no. of moles = 0.920 moles
volume=?
Solution:
as, molarity= [tex]\frac{moles}{volume in dm^3}[/tex]
so, volume =[tex]\frac{moles}{molarity}[/tex]
putting values:
= [tex]\frac{0.920}{1.50}[/tex]
volume = 0.613dm^3
HCI (aq) + Ba(OH)2 (aq) →
+
-
Which of the following reactions shows a correctly balanced chemical
equation for the titration being performed?
A 2 HCl (aq) + Ba(OH)2 (aq) → BaH2 (aq) + 2 CIOH (aq)
B 2 HCl (aq) + Ba(OH)2 (aq) → BaCl2 (aq) + 2 H20 (1)
CHCl (aq) + Ba(OH)2 (aq) → BaCl (aq) + H2O2 (1)
DHCl (aq) + Ba(OH)2 (aq) → Bao (s) + H3CIO (aq)
Answer:
B. 2 HCl (aq) + Ba(OH)2 (aq) → BaCl2 (aq) + 2 H20 (1)
Explanation:
When you combine an acid and a base, the products are water (H2O), and an ionic compound, or salt.
Option B is the only one that contains an ionic compound (BaCl2) and water as the products.
Which sport is required to have both male and female competitors?
A. Water polo
B. Swimming
C. Hockey
D. Mixed doubles tennis
Answer:
D. Mixed doubles tennis
Explanation:
Mixed doubles tennis is just normal tennis but the 'mixed' means that on both teams there is both one man and one woman.
what is the molarity of a solution in which 0.257 moles of HNO2 is dissolved in 490ml of water
Answer:
= 0.524M
Explanation:
data;
volume = 490ml
= 490 / 1000
= 0.49 dm^3
moles = 0.257 moles
molarity = ?
solution:
molarity = [tex]\frac{no. of moles}{volume in dm^3}[/tex]
= 0.257 / 0.49
molarity = 0.524M
0. Calculate the amount of heat absorbed when 5.50 g of aluminum is heated from
25.0°C to 95.0°C. The specific heat of aluminum is 0.897 J/g °C).
Answer:
34.5J
Explanation:
Amount of Heat(Q) = mc∆T
where m (mass of aluminum) = 5.50g
c (specific heat capacity of aluminum) = 0.897J/g°C and ∆T = 95.0°C - 25.0°C = 70.0°C
Q = 5.50x 0.897x 70.0
= 34.5354J = 34.5J
The amount of heat absorbed when 5.50 g of aluminum is heated from 25.0°C to 95.0°C is 34.5 J.
What is heat?Heat is defined as a form of the energy transmitted from one body to another as a result of a temperature difference.
It can also be defined as the potential energy stored in the bonds that hold the object's particles together.
Heat absorption is defined as absorption of heat without increasing the temperature at the certain point.
Amount of heat = mcΔT
Where m = 5.50g
c = 0.897 J/g °C
ΔT = 95.0°C - 25.0°C
= 70.0°C
So, amount of heat = 5.50 x 0.897 x 70.0
= 34.5354 J = 34.5 J
Thus, the amount of heat absorbed when 5.50 g of aluminum is heated from 25.0°C to 95.0°C is 34.5 J.
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Please help! Urgent!
Given the reaction: 2CH3OH(l) + 3O2(g)—> 2CO2(g) + 4H2O(g) how many liters of O2(g) are needed to produce exactly 200 liters of CO2
A certain compound is made up of one carbon (C) atom, two chloride (Cl) atoms and one oxygen (o) atom what is the chemical formula of this compound
CO(Cl)2 will be the formula which has a common name of phosgene a highly poisonous gas .
a 20.0 L container of helium used to fill balloons is at a pressure of 150 atm and a temperature is 30.0 C. How many balloons can be filled to 5.0 L, if the temperature is 22 C and the atmospheric pressure is 1.05 atm?
The number of balloons that can be filled by the container of helium is 380.
To calculate the number of balloons that can be filled, we use the formula below.
Formula:
N = PVT'/P'V'T........... Equation 1\Where:
N = Amount of balloons that can be filled by the containerP = Pressure of helium in the containerV = Volume of helium the containerT = Temperature of the containerP' = Pressure of the balloonV' = Volume of the balloonT' = Temperature of the balloon.From the question,
Given:
P = 150 atmV = 20 LT = 30 °C = 203 KP' = 1.05 atmV' = 5 LT' = 22 °C = 295 KSubstitute these values into equation 1
N = (150×20×295)/(5×1.05×203)N = 380.4 balloonsN ≈ 380 balloons.Hence, the number of balloons that can be filled by the container of helium is 380.
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SI unit are used for scientific measurement why
Answer:
Explanation:
SI unit is an international system of measurements that are used universally in technical and scientific research to avoid the confusion with the units. Having a standard unit system is important because it helps the entire world to understand the measurements in one set of unit systems.
Unit of Electric Charge: Unit of Wavelength
Unit of Mass: Unit of Velocity:
1.consider the following overall reaction 6 CL + 2 AU³ → 3C L₂(g) + 2 AU (s)
(I) write down the cell notation for the cell
(i) Construct a fully labelled Galvanic cell for the reaction given above
Answer:
AU(s)| AU³||CL,Cl2|Pt(s)
Explanation:
I started with the anode on my left hand side because AU id undergoing oxidation and on the right hand side CL is undergoing reduction hence it's a cathode, and since for the cathode we don't have a metal in a solid state we are going to add Pt
Determine the amount of energy required to heat 4.00 grams of H₂O (t) at 60°C to H₂O (t) at 85°C.
Answer: See attached image
Explanation:
Propane boils at -42C. Octane boils at 126C Which is a gas at the freezing point of water?
The substance which is a gas at the melting point of water is the gas propane.
What is freezing point?The term freezing point refers to the point at which a liquid turns to solid. It is often the temperature as the melting point.
Thus, the substance which is a gas at the melting point of water is the gas propane.
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When the atoms that are transition elements form ions, the __ electrons are lost before the _electrons are lost.
Answer:According to the Aufbau principle, the electrons fill the 4s sublevel before beginning to fill the 3d sublevel. However, the outermost s electrons are always the first to be removed in the process of forming transition metal cations.
Explanation:hope its help
advantage of fossil fuels
Answer:
I don't know
Explanation:
I don't know the answer but it is use for car
what is the molarity of a solution in which 0.381 moles of CuCl is dissolved in 1039ml of water
Answer:
= 0.366 M
Explanation:
data;
moles = 0.381 moles
volume = 1039ml
= 1039 / 1000
= 1.039dm^3
molarity = ?
solution
molarity = [tex]\frac{moles}{volume in dm^3}[/tex]
= 0.381 / 1.039
molarity = 0.366 M
This is an impossible formula. If it were real, determine the molar mass of:
Fe1S1O5
The molar mass of the ammonium lauryl sulfate is 283.43 g/mol.
What is Ammonium lauryl sulfate?It is also called ammonium dodecyl sulfate. It is used in shampoos we use for hair. It can be dissolved in both polar and non-polar solvent. It can cause skin irritation sometimes.
Thus, the molar mass of the ammonium lauryl sulfate is 283.43 g/mol.
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what is the most important thing to know about the general term "discrepant event"?
Answer:
Discrepant events — demonstrations that produce unexpected outcomes — are used in science to capture students' attention and to confront their beliefs about a “phenomenon by producing an outcome which is contrary to what their previous experiences would lead them to believe is true” (Misiti, 2000, p.
a student wants to fry an egg in a 1,770 g iron skillet. an egg will become firm at 70 degrees Celsius. the specific heat capacity of iron is 0.444. if the skillet begins at room temperature of 25 degrees Celsius, what is the minimum amount of energy that must be transferred to the skillet in order to fry the egg.
What will most likely cause a sudden wind to start blowing? Help ;-;
A. Clouds
B. Humidity
C. Precipitation
D. Air pressure
it is D. Air pressure!!! :)
Based on the kinetic theory, which statement is true? (5 points)
O Matter consists of only large molecules.
Matter is made up of only charged particles.
The particles of matter have zero kinetic energy and potential energy.
O The particles of matter are arranged in different ways for the different states.
Answer:
the particles of matter are arranged in different ways for the different states
Explanation:
because solid liquid and gas all three matters have different states for example the particles in a solid are closely packEd and form of movement is vibration
Boyle's Law
A container holds 500 mL of CO2 at 20° C and 742 torr. What will be the volume of the CO2 if the pressure is increased to 795 torr?
Given:
Unknown:
Formula:
Solution:
Final Answer:
Convert vol to L
500mL=0.5LApply Boyles law
P1V1=P2V2742(0.5)=795V2371=795V_2V2=0.467LV2=467mL[tex]\large{\underline{\underline{\pmb{\sf{\pink{Ꮧnswer:-}}}}}}[/tex]
P1=742 torrP2=795 torrV1=500mLV2=?T1=20∘C+273=293KT2=20∘C+273=293KP1V1 = P2V2
V2 =P1V1/P2
=(742×500)/(795) = 467mL CO2
Which choice is not a physical property of matter?
O boiling point
O melting point
O viscosity
O heat of combustion
Answer: The Correct answer is D.) Heat of combustion
Explanation:
Answer:
D
Explanation:
i took the k-12 test
Write the formula unit equation for this reaction occuring in water:
Calcium sulfide and iron(II) bromide are mixed to form iron(II) sulfide and calcium bromide.
1. CaS(aq) + FeBr(aq) →FeS(s) + CaBr(aq)
2. CaS(aq) + Fe2Br(aq) →Fe2S(s) + CaBr2(aq)
3. CaS(aq) + FeBr2(s) →FeS(s) + CaBr2(aq)
4. CaS(aq) + FeBr2(aq) →FeS(s) + CaBr2(s)
5. CaS(aq) + FeBr2(aq) →FeS(s) + CaBr2(aq)
6. CaS(s) + FeBr2(aq) →FeS(s) + CaBr2(s)
7. CaS(aq) + FeBr2(aq) →FeS(aq) + CaBr2(aq
The formula unit equation for the given reaction occurring in water is
CaS(aq) + FeBr₂(s) → FeS(s) + CaBr₂(aq).
What is chemical reaction?
Chemical reactions are those reaction in which reactant molecules react with each other for the formation of product.
When calcium sulfide reacts with iron (II) bromide for the formation of iron(II) sulfide and calcium bromide will be represented through the following equation:
CaS(aq) + FeBr₂(s) → FeS(s) + CaBr₂(aq)
Above reaction best explains the formula unit of given reaction as all valency of atoms are satisfied there.
Hence, the required formula unit is CaS(aq) + FeBr₂(s) → FeS(s) + CaBr₂(aq).
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SCIENCE!
Kaila was organizing data about the rise in popularity of computers and internet usage
in the US. She made a table with the percentages of home with computers and internet access. Which of the following is NOT a reason that home computer and internet usage have increased?
A.more options for computer technologies
B.better offsite storage facility and server farms
C.home computers contain better technology and can be cheaper
D.better reliability of data transmissions
If 5.81 moles of magnesium (Mg) reacts to completion, how many moles of hydrochloric acid (HCI) are need to react with magnesium.
What term describes the movement of small rock particles
away from their source?
O Weathering
O Decomposition
O Erosion
Answer:Erosion
Explanation:
I got it right on edmentum
Vanessa made a list comparing the differences between the outer coverings in plants and animals, but she made a mistake. Read the table and then choose the statement that explains why the list is incorrect.
The difference between the outer covering of plants and animals is that plant cell has cellulose cell wall while animal cell is surrounded by a cell membrane
What is a cell?A cell is the structural and functional unit of an organism which is capable of existing alone as it contains organelles that perform specific functions.
The plant cell is covered by a rigid cell wall which contains cellulose as its outer covering.
The animal cell contains not cellulose cell wall at its out covering but instead it is covered by a cell membrane.
Therefore, the difference between the outer covering of plants and animals is that plant cell has cellulose cell wall while animal cell is surrounded by a cell membrane.
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