Answers
The balanced equation is: 2 Fe(NO₃)₃ + 2 MgO → Fe₂O₃ + 2 Mg(NO₃)₂.
The balanced equation for the reaction between Fe(NO₃)₃ and MgO can be determined by ensuring that the number of atoms of each element is equal on both sides of the equation.
Fe(NO₃)₃ + MgO → Fe₂O₃ + Mg(NO₃)₂
To balance the equation, we can follow these steps:
1. Balance the number of Fe atoms:
There are two Fe atoms on the product side (Fe₂O₃), so we need a coefficient of 2 in front of Fe(NO₃)₃:
2 Fe(NO₃)₃ + MgO → Fe₂O₃ + Mg(NO₃)₂
2. Balance the number of O atoms:
There are three O atoms in Mg(NO₃)₂ and three O atoms in Fe(NO₃)₃, so the O atoms are already balanced.
3. Balance the number of N atoms:
There are six N atoms in Fe(NO₃)₃, so we need a coefficient of 2 in front of Mg(NO₃)₂ to balance the N atoms:
2 Fe(NO₃)₃ + MgO → Fe₂O₃ + 2 Mg(NO₃)₂
4. Balance the number of Mg atoms:
There are two Mg atoms in Mg(NO₃)₂, so we need a coefficient of 2 in front of MgO to balance the Mg atoms:
2 Fe(NO₃)₃ + 2 MgO → Fe₂O₃ + 2 Mg(NO₃)₂
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Related Questions
How many grams of NaCl
Answers
You would recover 36.525g of NaCl after evaporating all of the water.
How to find the how many grams of NaCl that would be recover when all water is evaporated off of this solution?To find the grams of NaCl that would be recovered after evaporating all the water, we can use the following formula:
mass = moles * molar mass
Where:
Moles = Molarity * Volume
Molarity = 0.250 M
Volume = 2500.0 mL = 2.5 L
Molar mass of NaCl = 58.44 g/mol
mass = 0.250 M * 2.5 L * 58.44 g/mol
mass = 36.525 g
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Need help with this question please.
Answers
Answer:
12.8
Explanation:
14 = pOH + pH
pH = 14 - pOH
pH = 14 - 1.2
pH = 12.8
Please help! How many orbits will the Bohr models in the fourth period have?
Answers
Answer:
32 electron
Thus,the fourth level can hold up to 32 electrons,2 in the s orbital,6 in the three p orbitals,10 in the five d orbitals,and 14 in the seven f orbitals.
Gаvе аn example of how energy from the sun gets into your cells
Answers
Answer:
production of vitamin D
Find the number of moles in 25.0g of ammonium
Answers
Answer:
1.389 moles
Explanation:
We are given that
Given mass of ammonium=25.0 g
We have to find the number of moles in 25.0g of ammonium.
The chemical formula of ammonium \(NH^{+}_4\)
Molar mass of N=14, Molar mass of H=1
Molar mass of ammonium (NH4+)=14+4(4)=18 g/mol
We know that
Number of moles=Given mass/Molar mass
Using the formula
Number of moles of ammonium=\(\frac{25}{18}\)moles
Number of moles of ammonium=1.389 moles
Hence, the number of moles in 25.0g of ammonium=1.389 moles
List the 2 pKa's for H2SO4
Answers
i need help answering number 1 and number 3 50 points!!
Answers
The removal of hydrogen or any other electropositive element, or the addition of oxygen, is said to be the process of oxidation in classical or earlier concepts. An atom or ion gains one or more electrons during the process of reduction.
1. The oxidation half-reaction of copper is:
Cu → Cu²⁺ + 2e⁻
The reduction half is:
Cu²⁺ + 2e⁻ → Cu
3. An anode in electrochemistry is, in its simplest form, the site of an oxidation reaction. Due to the anode's electrical potential, negative ions or anions usually react there and release electrons. After that, these electrons ascend and enter the drive circuit.
In chemistry, the cathode is referred to as the electrode where reduction takes place. In an electrochemical cell, this is typical. Here, the cathode is negative because the cell's electrical energy supply causes chemical molecules to break down.
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Part I: Multiple Choice Questlons
1. A solution is a:
a heterogeneous mixture
C suspension
b homogeneous mixture
d colloid
Answers
Answer:
A cuz a heterogeneous mixture is no uniform
Answer:
A heterogeneous mixture
CAN SOMEONE HELP WITH THIS QUESTION?
Answers
The usual enthalpy change for the 200g/7.68 mol of ethyne reaction is C2H6g C2H2g Plus 2H2g - 2,388.5kJ.
What does the letter H mean for chemistry?The quantity of heat released or absorbed during a reaction occurring at constant pressure is known as the enthalpy change.
In thermodynamics, what does H mean?H stands for "enthalpy change," Hf for "system final enthalpy" (i.e., the enthalpy of the byproducts of the system in equilibrium in a chemical reaction), and Hi for "system initial enthalpy" (i.e., the entropy for the reactants in a chemical reaction).
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If 7 g of a gas at 2.0 ATM dissolves in 1 L of water at 25°C how much will dissolve in 2 L of water at 0.6 ATM if the temperature remains constant
Answers
The value of S2 is S₂ = 2.1 g/L.Approximately 2.1 g of the gas will dissolve in 2 L of water at 0.6 ATM, assuming the temperature remains constant.
To determine the amount of gas that will dissolve in 2 L of water at 0.6 ATM, we can use Henry's law, which states that the solubility of a gas is directly proportional to the partial pressure of the gas above the liquid.
According to Henry's law, the solubility of a gas can be represented as:S₁/P₁ = S₂/P₂,,where S₁ and S₂ are the solubilities of the gas at the respective pressures P₁ and P₂.Given that 7 g of the gas dissolves in 1 L of water at 2.0 ATM, we can consider this as our initial condition, denoted by S₁/P₁.
Now, we need to find the solubility at 0.6 ATM in 2 L of water, denoted by S₂/P₂.Since the temperature remains constant, we can assume that the solubility of the gas does not change. Therefore, we can rewrite the equation as:
S₁/P₁ = S₂/P₂,
Substituting the known values, we have:
(7 g/1 L)/(2.0 ATM) = S₂/(0.6 ATM),
Solving for S₂, we get:
S₂ = (7 g/1 L) * (0.6 ATM)/(2.0 ATM),
S₂ = 2.1 g/L.
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a. When comparing the two elements Ca and As , the more metallic element is:__________ based on periodic trends alone.
b. When comparing the two elements Ca and As , the more metallic element is: ______________ based on periodic trends alone.
c. When comparing the two elements Sb and Pb , the more metallic element is:___________ based on periodic trends alone.
d. When comparing the two elements S b and P b , the more metallic element is: ________________ based on periodic trends alone.
Answers
Answer:
Ca.
Sb.
Explanation:
a. When comparing the two elements Ca and As , the more metallic element is:__________ based on periodic trends alone.
The correct option is Ca. Ca belongs to group 2 which is more easily give off it's electrons, compared to As which is a group 5 member.
c. When comparing the two elements Sb and Pb , the more metallic element is:___________ based on periodic trends alone.
The correct option here is Pb. Thhs is because ionization energy decreases down the group. Pb has a lower ionization enthalpy than Sb
Answer:
a) Ca
b) Ca
c) Pb
d) Pb
Explanation:
We must have it behind our minds that metallic properties decreases as we tend towards the right and side of the periodic table. This implies that we find more metallic species at the left hand did of the periodic table and as we tend towards the right hand side, elements become less metallic as indicated by periodic trends.
Calcium is a group 2 metal with full metallic properties while arsenic is a metalloid. Similarly, lead is a group 14 metal with full metal properties while antimony is a metalloid. Hence the answers given above.
If a raptor's wingspan were 112 centimeters, how long
would its body have to be for it to have a body-to-
wingspan ratio of 0.45?
Answers
Answer:
162.4 cm
Explanation:
please give brainliest award
They allow atoms to _______ and form ____________ or ____________ substance.
Answers
Answer:
They allow atoms to combine and form new substance.
Drawing were everything goes will be much appreciated it thank you
Answers
Following is the classification of given substances:
Atomic element: Ag
Molecular element: F₂
Molecular compound: CO
Ionic compound: PbI₄
What is a molecule?Molecules, groups of two or more atoms that form the smallest identifiable unit that can divide a pure substance and that retain the composition and chemical properties of that substance.
An atom consists of a single positively charged nucleus surrounded by a cloud of negatively charged electrons. As the atoms approach, the electron clouds interact with each other and with the nucleus. This interaction causes atoms to combine to form molecules when the energy of the entire system is reduced. From a structural point of view, a molecule consists of a collection of atoms joined by valences. A diatomic molecule contains two atoms chemically bonded together. When two atoms are identical, like oxygen (O2) molecules, they form a homonuclear diatomic molecule, but when the atoms are different, like carbon monoxide (CO) molecules, they are heteronuclear. Forms a diatomic molecule. Molecules containing two or more atoms are called polyatomic molecules. B. Carbon dioxide (CO2) and water (H2O). A polymer molecule can contain thousands of constituent atoms.
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Question 4 of 10
Based on information from the periodic table, what does this image
represent?
= 9 Protons
= 10 Neutrons
= 10 Electrons
A.Neutral fluorine
B. A positively charged fluoride ion
C. A negatively charged fluoride ion
D. A neutral neon atom
Answers
So we can cross out D.
Next, we can figure out a charge of an ion by looking at protons and electrons. Neutrons doesn’t matter since they’re neutral and only contribute to the mass. Protons and positive and electrons are negative. It’s like doing kindergarten math. John has 9 apples and he eats 10 (I know it’s not possible), how many apples does he have left? The answer is -1. The number of electrons are greater than the number of protons, so the ion is negative.
The answer is therefore C. A negatively charged fluoride ion.
which is a way to express concentration of a solution? parts per billion moles molar mass force per square meter
Answers
Answer:
parts per billion
Explanation:
I took the quiz
Answer:
parts per billion
Explanation:
edge 2021
Mr. Garcia's students are studying animal habitats. A habitat is the place where an animal or plant lives. They marked off five plots
on the school campus to count worms. First they predicted that the most worms would live in the damp, shady places on campus,
Then they made their counts. The number of worms they found in each plot is recorded in the data table, Maria and Sarah
suggested that they cover the sunny plots with some wet hay and then go back and count the worms in a week. Predict the
outcome if the girls make this change.
A
There will be no change in the worm-counts:
B)
There will be more worms counted in the once sunny plots.
Worms from the shady plots will move to the covered plots.
D
The worms will leave the sunny, covered plots and move to the shady
plots
Answers
Answer:
B. There will be more worms counted in the once sunny plots.
Explanation:
I just finished the quiz. Hope this helps :)
The average birth weight of domestic cats is about 3 ounces. Assume that the distribution of birth weights is Normal with a standard deviation of 0 4 ounce.
a. Find the birtn weight of cats at the 90th percentile.
b. Find the birth weight of cats at the 10th percentile
Answers
The birth weight of cats at the 90th percentile would be approximately 3.7 ounces. b. The birth weight of cats at the 10th percentile would be approximately 2.3 ounces.
What are the methods of calculating weight?There are three main methods of calculating weight:
1. Balance Beam Scale: A balance beam scale is an example of a mechanical weighing system. It uses a set of calibrated weights to measure the weight of an object.
2. Digital Scale: A digital scale uses an electronic or digital readout to display the weight of an object.
3. Calipers: Calipers are devices used to measure the distance between two points, such as thickness or diameter. They come in various sizes and shapes, depending on the type of measurement the user wants to take.
What is birth weight?Birth weight is the weight of a baby at the time of birth. It is usually measured soon after delivery, with a special baby scale, though sometimes the baby's weight is estimated. The normal range of birth weight is anywhere between 5 lbs 8 oz and 10 lbs, though preterm or premature babies may be significantly lighter. A baby's birth weight is important because it can provide a clue to the baby's overall health. High birth weights may indicate an underlying medical condition, and low birth weights can be a sign of premature or difficult delivery and health risks associated with such a delivery.
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Where Did the Water
in the Puddle Go
Six friends were walking to the park on a sunny day. They noticed a big puddle
on their way to the park. When they came back two hours later, the puddle was
gone. They each had different ideas about where the water in the puddle went.
This is what they said:
Bandari: The water went right up to the clouds.
Regina: The sun dried the water up and it no longer exists.
Dylan: All of the water soaked into the ground.
Axel: Much of the water is in the air around us.
The water went into a stream, river, pond, lake, or ocean.
Clinti: The water changed into fog.
Explain your
Which friend do you think has the best idea?
thinking
Answers
Answer:
Axel: Much of the water is in the air around us.
Explanation:
When a puddle of water forms on the ground, it indicates that much of the ground around it is saturated with water and as such, the water would not readily soak into the ground. Also, since the puddle was found in a park, it is not likely that the water has gone into a stream, river, pond, lake, or ocean.
Since, the day was a sunny, it means that the heat from the sun has caused the evaporation of the water molecules. However, the water vapor molecules do not just immediately rise up to the atmosphere to form clouds nor do they cease to exist, rather it is dispersed in the air around the surroundings and beyond. Formation of clouds by water vapor takes days to happen.
Also, the water has not changed to fog either as they form usually at cooler temperatures.
On a warm, pleasant day, you notice some clouds in the sky. The clouds are very high up in the sky and look quite thin.
tell me Which type of clouds are in the sky?
cirrus
cumulus
stratus
fog
Answers
Answer:
their citrus clouds
Explanation:
I looked it up on the internet
V
A student dissolves 11.S g of sodium hydroxide (NaOH) in 250. g of water in a well-insulated open cup. He then observes the temperature of the water rise
from 20.0 °C to 31.3 °C over the course of 6.7 minutes.
Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction:
NaOH(s) -. Na (ag) + OH (ag)
You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to 3
significant digits.
Note for advanced students: it's possible the student did not do the experiment carefully, and the values you calculate may not be the same as the known and
published values for this reaction.
is this reaction exothermic, endothermic, or neither?
Oexothermic
O endothermic
O neither
0.°
If you said the reaction was exothermic or endothermic, calculate the amount of
heat that was released or absorbed by the reaction in this case.
Calculate the reaction enthalpy AH.
nen per mole of NaOH.
kJ
Answers
According to the question the reaction enthalpy is thus 10610 J / 0.278 moles = 38.3 kJ/mol.
What is enthalpy?Enthalpy is a thermodynamic property of a system that measures the total energy content of a system. It is a state function that is expressed in terms of internal energy, pressure, and volume of a system. Enthalpy represents the amount of energy that is associated with a chemical reaction or physical change.
The reaction is exothermic, meaning that heat is released during the reaction. The amount of heat released can be calculated with the equation q = mcΔT, where q is the heat released, m is the mass of the solution, c is the specific heat capacity of the solution, and ΔT is the change in temperature of the solution. Using the given data, the amount of heat released by the reaction can be calculated as q = (250 g)(4.184 J/g-K)(11.1 K) = 10610 J. The enthalpy change for the reaction can then be calculated by dividing the heat released by the number of moles of NaOH, which is 11.1 g / 40.00 g/mol = 0.278 moles. The reaction enthalpy is thus 10610 J / 0.278 moles = 38.3 kJ/mol.
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20 PTS Which explains the differences in the distribution of solar energy on Earth's surface? (1 point)
A. Earth’s climate system determines how much energy is absorbed from the sun.
B. Earth’s gravitational force pulls the sun’s rays away from the equator.
C. Earth’s solar energy is dependent on air currents.
D. Earth’s curved shape and tilt on its axis do not allow the sun’s rays to fall evenly on its surface.
Answers
The differences in the distribution of solar energy on Earth's surface is due to Earth’s curved shape and tilt on its axis do not allow the sun’s rays to fall evenly on its surface.
The correct option is D.
What is solar energy?Solar energy refers to the energy produced by the Sun.
Solar energy is in the form of heat energy, light energy, and ultraviolet radiation.
The shape of the affects the amount of solar energy that reaches any region of the earth. The earth is spherical in shape. Hence, there is an uneven distribution of solar energy from the sun o the Earth. also, the tilt of the earth affects the amount of solar energy that reaches any region of the earth.
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Starting with 0.3500 mol CO(g) and 0.05500 mol COCl2(g) in a 3.050 L flask at 668 K, how many moles of CI2(g) will be present at equilibrium?
CO(g) + Cl2(g)》COCl2(g)
Kc= 1.2 x 10^3 at 668 K
Answers
At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.
1: Write the balanced chemical equation:
\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)
2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.
Initial:
\(C_O\)(g) = 0.3500 mol
\(Cl_2\)(g) = 0.05500 mol
\(C_OCl_2\)(g) = 0 mol
Change:
\(C_O\)(g) = -x
\(Cl_2\)(g) = -x
\(C_OCl_2\)(g) = +x
Equilibrium:
\(C_O\)(g) = 0.3500 - x mol
\(Cl_2\)(g) = 0.05500 - x mol
\(C_OCl_2\)(g) = x mol
3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:
Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]
4: Substitute the given equilibrium constant (Kc) value into the expression:
1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)
5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:
1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x
6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.
7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.
8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):
\(Cl_2\)(g) = 0.05500 - x
9: Calculate the value of \(Cl_2\)(g) at equilibrium:
\(Cl_2\)(g) = 0.05500 - x
\(Cl_2\)(g) = 0.05500 - (positive value of x)
10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.
Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.
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A bottle of viranin water contains 3500 mg of potassium in 591.5 mg of H2O. What is the concentration of potassium by mass percent
Answers
Answer: 085.5%
Explanation:
Electrolysis Is One of the Modern Technologies in Architecture’ Prepare an Investigatory Report That Supports the Statement”.
Answers
Electrolysis is a technique that separates natural elements. It is commercially used to obtain important materials (e.g., pure metals) for construction.
Electrolysis refers to the use of an electric current to trigger non-spontaneous chemical reactions.
This technology (electrolysis) is commercially important in industry, construction and therefore also in architecture in order to extract metals and minerals from the ground.
Electrolysis uses particular electrolytic cells in order to extract highly pure metals from ores.
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Answer: Electrolysis is a technique that separates natural elements. It is commercially used to obtain important materials (e.g., pure metals) for construction.
Electrolysis refers to the use of an electric current to trigger non-spontaneous chemical reactions.
This technology (electrolysis) is commercially important in industry, construction and therefore also in architecture in order to extract metals and minerals from the ground.
Electrolysis uses particular electrolytic cells in order to extract highly pure metals from ores.
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The density of aluminum is 2.7 g/mL if I add a piece of aluminum to a graduated cylinder of water in the water level increases by 8.2 ML what is the mass of the piece of aluminum
3.0 g
22 g
5.5 g
0.33 g
Answers
Which formula represents a nonpolar molecule containing polar covalent bonds?
Answers
Answer:
Figure 2 represents a nonpolar molecule containing polar covalent bonds
Explanation:
The CO2 molecule is linear, formed by 3 atoms and the electronegativity variations are equal, so its dipolar moment will be null, and this molecule will be nonpolar, however, it has polar covalent bonds.
Jared is using a 100 ft rope to set up a kite-shaped area for food vendors. He has started roping off the area as shown below, and has one more stake to place. How can Jared use all of the rope to complete the kite shape?
Explain.
30 ft
Answers
Jared can use the entire 100 ft rope to complete the kite shape by placing the remaining stake at the center
To use the entire 100 ft rope to complete the , Jared can follow these steps:
1)Place the first stake at the center of the intended kite shape.
2)Measure a distance of 30 ft from the center stake in one direction and place a second stake at that point.
3)Measure a distance of 30 ft from the center stake in the opposite direction and place a third stake at that point.
4)Measure a distance of 20 ft from the center stake in the remaining two directions perpendicular to the first measurements, and place the fourth and fifth stakes at those points.
Finally, connect the stakes with the rope to form the complete kite shape.
The kite shape has two pairs of equal-length adjacent sides. In this case, the sides measured at 30 ft create one pair, while the sides measured at 20 ft create the other pair. This configuration allows Jared to use all of the 100 ft rope.
To visualize the shape:
The center stake acts as the point where the two pairs of adjacent sides meet.The first pair of adjacent sides measures 30 ft each, extending in opposite directions from the center stake.The second pair of adjacent sides measures 20 ft each, perpendicular to the first pair and also extending in opposite directions from the center stake.By following this arrangement, Jared will use the entire length of the 100 ft rope to create the kite shape for the food vendors.
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(b) Two compounds, A and B, have the molecular formula C₂H6O. On treatment with Na metal, compound A releases H2 gas and compound B does not.
Can you give a reason to help to explain the observation better?
Answers
The observation that compound A releases H2 gas while compound B does not when treated with Na metal can be explained by considering the structural differences between the two compounds and their ability to undergo specific reactions.
Compound A and compound B both have the molecular formula C₂H₆O, which indicates that they both contain two carbon atoms, six hydrogen atoms, and one oxygen atom. However, the difference lies in the arrangement of these atoms within the molecules. One possible explanation for the observed difference is that compound A is an alcohol, specifically ethanol (CH₃CH₂OH), while compound B is an ether, such as dimethyl ether (CH₃OCH₃). The presence of the hydroxyl group (-OH) in ethanol enables it to undergo a reaction with sodium metal, known as the metal-acid reaction. In this reaction, the metal displaces the hydrogen from the hydroxyl group, forming sodium ethoxide (CH₃CH₂ONa) and releasing hydrogen gas (H₂). On the other hand, ethers like dimethyl ether lack the hydroxyl group and therefore cannot undergo the metal-acid reaction. Consequently, when compound B is treated with sodium metal, no hydrogen gas is released. The ability of compound A to release hydrogen gas while compound B does not when treated with sodium metal can be attributed to the presence of a hydroxyl group in compound A (ethanol), enabling it to undergo a metal-acid reaction, whereas compound B (dimethyl ether) lacks the necessary functional group and thus does not undergo this reaction.
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One-eighth of a sample of 227 Th 90 (227 90 Th) remains undecayed after 54 days. What is the half-life of the thorium isotope?
Answers
Answer:
Half-Life = 18 days
Explanation:
Isotope decay follows the equation:
Ln[A] = -kt + ln[A]₀
Where [A] is amount of isotope after time t,
k is rate constant
[A]₀ is initial amount of isotope.
If we solve rate constant, we can find half-life by using:
Half-life = ln 2 / Rate constant
Replacing in isotope decay equation:
Ln[1/8] = -k*54 days + ln[1]
-2.07944 = -54k
0.0385days⁻¹ = k
Half-Life = ln 2 / 0.0385days⁻¹
Half-Life = 18 days