How does molecular shape affect polarity?
Answers
Polarity mainly depends upon the shape of a molecule. For example, In water Oxygen being more electronegative is partial negative and Hydrogen being less electronegative is partial positive. It is polar and has a bent structure. It means the two bond moments are not cancelling each other hence the water molecule has a net dipole moment of 1.84 D.
Secondly, CO₂ (Carbon dioxide) also has a more electronegative Oxygen atom and less electronegative Carbon atom. In this case the net dipole moment on CO₂ is zero. This is because the structure of CO₂ is linear. As the two dipoles being equal and opposite cancel out the effect of each other making the CO₂ molecule non-polar.
Answer: If the molecule is symmetric, the effect of polarity will cancel out
Explanation: Apex
Related Questions
According to quantum, when will a resonator radiate or absorb energy?
Answers
A resonator will radiate or absorb energy when the energy equals an integer multiple of hf, the smallest quantum of energy. This is in line with Planck's quantization of energy, essential for understanding atomic and molecular radiation interactions.
Explanation:A resonator will radiate or absorb energy when the energy in question is equal to an integer multiple of the smallest quantum of energy that can be absorbed by the particle, represented as hf, where h is Planck's constant and f is the frequency of the oscillator. According to quantum mechanics, this quantization of energy means that the energy levels an oscillator can occupy are discrete, not continuous. A quantum oscillator can only absorb or emit energy in these specific quantities. The process of absorption elevates the oscillator to a higher quantum state, while emission results in a transition to a lower quantum state.
The concept of energy quantization is an essential part of understanding the behavior of atoms and molecules as they interact with electromagnetic radiation. In the context of blackbody radiation, the quantized energies of the atoms lead to the emission of radiation according to their quantum states, and this principle was crucial for explaining the spectrum of blackbody radiation and resolving the 'ultraviolet catastrophe.' The contributions of Max Planck to quantum mechanics laid the groundwork for modern physics, leading to the development of new technologies that have significantly changed our lives.
The half-life of a certain tranquilizer in the bloodstream is 5050 hours. how long will it take for the drug to decay to 8686% of the original dosage? use the exponential decay model, upper a equals upper a 0 e superscript kta=a0ekt, to solve.
Answers
We know that "A" is half of A0
A = A0 e^(k× 5050)
A/A0 = e^(5050k)
0.5 = e^(5055k)
In (0.5) = 5055k
-0.69315 = 5055k
k = -0.0001371
To calculate how long it will take to decay to 86% of the original mass
0.86 = e^(-0.0001371t)
In (0.86) = -0.0001371t
-0.150823 = -0.0001371 t
t = 1100 hours
if 392cm2 of helium at 32C and 925 torr are cooled to -15C and the pressure is reduced to 775 torr, calculate the new volume the gas will occupy
Answers
Solution:
Assuming ideal behavior of the helium gas, we can use the universal gas law equation
P1V1/T1 = P2V2/T2
The terms with subscripts of one represent the given initial values while for terms with subscripts of two represent the final conditions.
We rearrange the gas law equation to calculate for the new volume V2:
V2 = P1V1T2 / P2T1
We can now substitute the values to the expression. Therefore,
V2 = (925torr * 392cm3 * 258.15K) / (305.15K * 775torr)
V2 = 396 cm³ or 396 553 mL
If 2500. J of energy are added to 120. g of benzene at 30. degrees C, what will be its final temperature?
Answers
q = m Cp (T₂ - T₁) --- (1)
where;
Cp = Specific Heat
Specific heat of Benzene is 1.72 J/g.°C
Now,
Solving equation 1,
(T₂ - T₁) = q / m Cp
Putting values,
(T₂ - 30 °C) = 2500 J ÷ (120 g ×1.72 J/g.°C)
(T₂ - 30 °C) = 2500 J ÷ (206 J/°C)
(T₂ - 30 °C) = 12.13 °C
T₂ = 12.13 °C + 30 °C
T₂ = 42.13 °C
The final temperature of benzene after adding 2500 J of energy is 41.97°C.
To determine the final temperature of benzene after adding 2500 J of energy, we can use the formula for specific heat capacity:
q = mcΔT
Where:
q is the heat added (2500 J)m is the mass of benzene (120 g)c is the specific heat capacity of benzene (1.74 J/g°C)ΔT is the change in temperatureRearranging the formula to solve for ΔT:
ΔT = q / (mc)
Substitute the given values:
[tex]\Delta T = \frac{2500 \, \text{J}}{120 \, \text{g} \times 1.74 \, \text{J/g \textdegree C}}\\\\\Delta T = \frac{2500 \, \text{J}}{208.8 \, \text{J/°C}} \approx 11.97 \textdegree C[/tex]
Add this change to the initial temperature of 30°C:
Final temperature = 30°C + 11.97°C = 41.97°C
Therefore, the final temperature of the benzene after adding 2500 J of energy is 41.97°C.
Calculate the mass of agcl that should be produced when an excess of agno3 is reacted with 500 mg
Answers
Balanced chemical reaction:
2AgNO₃ + [Co(NH₃)₅Cl]Cl₂ → 2AgCl + [Co(NH₃)₅Cl](NO₃)₂.
m(Co(NH₃)₅Cl]Cl₂) = 500 mg ÷ 1000 mg/g = 0.5 g.
n(Co(NH₃)₅Cl]Cl₂) = 0.5 g ÷ 250.4 g/mol.
n(Co(NH₃)₅Cl]Cl₂) = 0.002 mol.
From chemical reaction: n(Co(NH₃)₅Cl]Cl₂) : n(AgCl) = 1 : 2.
n(AgCl) = 2 · 0.002 mol = 0.004 mol.
m(AgCl) = 0.004 mol · 143.32 g/mol.
m(AgCl) = 0.573 g.
When the pressure that a gas exerts on a sealed container changes from 1100 bar to 75.5 bar, the temperature changes from k to 298 k?
Answers
P/T = k
where P - pressure , T - temperature and k - constant
[tex] \frac{P1}{T1} = \frac{P2}{T2} [/tex]
parameters for the first instance are on the left side and parameters for the second instance are on the right side of the equation
substituting the values in the equation
[tex] \frac{1100 bar}{T} = \frac{75.5 bar}{298 K} [/tex]
T = 4342 K
initial temperature was 4342 K
Answer:
4342 K
Explanation:
What is the general formula for a straight-chain alkane? cnhn cnh2n+2 cnhn+2 cnh2n?
Answers
Option B: [tex]C_{n}H_{2n+2}[/tex]
Alkane is defined as series of hydrocarbons which are saturated (all the carbon-carbon bonds are single) for example: methane, ethane, propane etc.
In alkane, carbon has 4 valence electrons so, it can make single bonds with 4 hydrogen atoms.
In the series, the first alkane is methane, it has 1 carbon atom thus, 4 hydrogen atoms are attached to it and molecular formula becomes [tex]CH_{4}[/tex]. Similarly, the second alkane in the series is ethane, it has 2 carbon atoms, both attached with single bond. The remaining three electrons in each carbon are shared with 3 hydrogen atoms each thus, it has total of 6 hydrogen atoms. Molecular formula of ethane will be [tex]C_{2}H_{6}[/tex].
Now, for general formula, let the number of carbon atoms be n thus, number of hydrogen atoms will be [tex]2n+2[/tex]
Therefore, general formula of straight chain alkane is [tex]C_{n}H_{2n+2}[/tex].
In the three-dimensional structure of methane, ch4, the hydrogen atoms attached to a carbon atom are aligned ________. in the three-dimensional structure of methane, ch4, the hydrogen atoms attached to a carbon atom are aligned ________. at the corners of a square at the corners of a tetrahedron at the corners of a cube in a straight line at the corners of a rectangle
Answers
In the three-dimensional structure of methane, CH₄, the hydrogen atoms attached to a carbon atom are aligned at the corners of a Tetrahedron.
Explanation:
In Methane (CH₄) the central atom (carbon) is bonded to four hydrogen atoms. So, the central atom is having four electron pairs and all pairs are bonding pairs and lacks any lone pair of electron. According to Valence Shell Electron Pair Repulsion (VSEPR) Theory the central atom with four bonding pair electrons and zero lone pair electrons will attain a tetrahedral geometry with bond angles of 109°. Hence, the shape of CH₄ is tetrahedral.
In methane (CH4), the hydrogen atoms align at the corners of a tetrahedron due to the carbon atom's sp³ hybridization. This results in a 109.5° angle between the hydrogens, forming a tetrahedral geometry. This critical alignment impacts the molecule's properties and stability.
Explanation:In the three-dimensional structure of methane (CH4), the hydrogen atoms attached to a carbon atom are aligned at the corners of a tetrahedron. This spatial orientation is due to the 109.5° angle between the hydrogen atoms, resulting in a tetrahedral geometry. This geometric configuration occurs because the carbon atom in methane exhibits sp³ hybridization, wherein the hybrid orbitals overlap with the s orbitals of hydrogen atoms, aligning the hydrogens in tetrahedral shape.
Such orientation plays a critical role in determining the properties of the methane molecule, and is common in many other hydrocarbons as well. In this configuration, each carbon electron pairs with a hydrogen electron when the C-H bonds are formed, resulting in a balanced and stable structure. The geometry is crucial to the function of macromolecules, which can also exist as linear carbon chains, carbon rings, or combinations of both.
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List a few ways that would lead you to believe a chemical reaction has occurred
Answers
Change in Color:
Few reactions proceed with the change in colour. When Bromine Water (yellow-Brown) is treated with unsaturated compounds, the color disappear as the reaction is completed.
Gas Production:
Some reactions proceed with the elimination of gas i.e. CO₂ , H₂, N₂, H₂O e.t.c.
Temperature Change:
Some reactions evolve or absorb heat when proceed. This change is the evidence of progress of reaction.
Thin Layer Chromatography:
Very important technique in detecting the progress of reaction by determining the number of spots for UV active compounds on TLC plate. Even non UV active compounds can be detected by using other locating agents.
Instrumental Techniques:
Modern techniques like IR, MS, NMR, UV spectroscopy can be used to detect the progress of reaction.
Write a general word equation for a neutralization reaction.
Answers
Final answer:
In a neutralization reaction, an acid reacts with a base to form salt and water, and the net ionic equation for this reaction usually involves hydrogen ions from the acid joining with hydroxide ions from the base to form water.
Explanation:
A general word equation for a neutralization reaction is: Acid + Base → Salt + Water
During neutralization, the hydrogen ions from the acid react with the hydroxide ions from the base to form water. The remaining ions (from the acid and base) then combine to form a salt. If we consider the neutralization of a strong acid with an ionic hydroxide, the net ionic equation simplifies to:
H3O+ (aq) + OH−(aq) → 2H2O(l)
This equation represents the concentration of hydrogen ions from the acid reacting with hydroxide ions from the base, simplifying down to just the formation of water since strong acids completely dissociate in water.
Which type of reaction is represented by the generic equation AB + CD mc002-1.jpg AD + CB?
Answers
This equation represents a Double Displacement Reaction.
Explanation:
Given equation is,
AB + CD → AD + CB
In above reaction A and C are switching their groups i.e. B and D. A has given off B to C and C has given D to A. Such reactions in which the cations and anions of two compounds are exchanged are called double displacement or double replacement reactions.
A 10.0ml sample of calcium hydroxide solution requirewd 26.85ml of 0.225 m hydrochoric acid for neutralization. calculate the nolar concentration of the bsae
Answers
Ca(OH)₂ + 2HCl ---> CaCl₂ + 2H₂O
stoichiometry fo Ca(OH)₂ to HCl is 1:2
number of HCl moles reacted - concentration of HCl x volume
number of HCl moles - 0.225 mol/L x 26.85 x 10⁻³ L = 6.041 x 10⁻³ mol
according to molar ratio
2 mol of HCl reacts with 1 mol of Ca(OH)₂
therefore 6.041 x 10⁻³ mol of HCl reacts with - 6.041 x 10⁻³ /2 mol = 3.021 x 10⁻³ mol
number of Ca(OH)₂ moles in 10.0 mL - 3.021 x 10⁻³ mol
therefore Ca(OH)₂ moles in 1000 mL - 3.021 x 10⁻³ mol / (10.0 x 10⁻³ L) = 0.302 mol/L
molarity of Ca(OH)₂ - 0.302 M
To calculate the molar concentration of the base, use stoichiometry and the given volume and concentration of the acid. The balanced chemical equation helps determine the moles of acid and base. Divide the moles of base by the volume of the base solution to find the molar concentration.
Explanation:To calculate the molar concentration of the base, we can use the stoichiometry of the neutralization reaction between calcium hydroxide (Ca(OH)2) and hydrochloric acid (HCl). The balanced chemical equation for this reaction is:
Ca(OH)2 + 2HCl → CaCl2 + 2H2O
From the equation, we can see that 1 mole of Ca(OH)2 reacts with 2 moles of HCl. We are given that 26.85 mL of 0.225 M HCl is required to neutralize a 10.0 mL solution of Ca(OH)2. The moles of HCl can be calculated using the equation:
moles of HCl = volume of HCl (L) × concentration of HCl (M)
Once we have the moles of HCl, we can use the stoichiometry of the reaction to calculate the moles of Ca(OH)2. Finally, we divide the moles of Ca(OH)2 by the volume of the Ca(OH)2 solution to find the molar concentration.
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Which one of these elements is an alkaline earth metal
Answers
What type of wave is sound?
a.longitudinal
b.surface
c.light
d.transverse
Answers
a.longitudinal.
What is the half-life of an isotope that decays to 6.25% of its original activity in 18.9 hours?
Answers
For 1st order reaction, we have
k = [tex] \frac{2.303}{t}Xlog \frac{\text{initial conc.}}{\text{final conc.}} [/tex]
where, k = rate constant of reaction
Given: Initial conc. 100, Final conc. = 6.25, t = 18.9 hours
∴ k = [tex] \frac{2.303}{18.9} X log \frac{100}{6.25} [/tex] = 0.1467 hours^(-1)
Now, for 1st order reactions: half life = [tex] \frac{0.693}{k} = \frac{0.693}{0.1467} [/tex] = 4.723 hours.
The half-life of an isotope that decays to 6.25% of its original activity in 18.9 hours is 4.725 hours. This is calculated by understanding that the isotope undergoes 4 half-lives to reach the 6.25% activity.
Explanation:The half-life (T1/2) of a radioactive isotope refers to the time period for half of the original nuclei to decay. In this case, the isotope decays to 6.25% of its original activity in 18.9 hours which means it goes through 4 half-lives (since (1/2)^4 = 1/16 which approximately equals 6.25%). Hence, the half-life of this isotope is 18.9/4 = 4.725 hours.
This concept is derived from the exponential decay of unstable radioisotopes where half-life (T1/2) is calculated by dividing the total time by number of half-lives.
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What are silicates? what are silicates? silicates are extended arrays of silicon and nitrogen. they are the most common network covalent atomic solids. silicates are extended arrays of sulfur and oxygen. they are the most common network covalent atomic solids. silicates are extended arrays of silicon and oxygen. they are the most common network covalent atomic solids. silicates are extended arrays of silicon and oxygen. they are the least common network ionic atomic solids?
Answers
Answer:
silicates are extended arrays of silicon and oxygen.
Explanation:
By definition, a silicate is a compound consisting of the chemical elements silicon (Si) and oxygen (O), derived from salicylic acid, which may be a salt or an ester. Of this group stand out the silicates formed by the alkali metals, constituent elements of Family IA of the periodic table, which are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs) and francium. (Fr), as these are water soluble and have various applications in industry and the laboratory. This list excludes the last two elements mentioned, due to their high molecular weight and their radioactivity. It is also relevant to report that salicylic acid is one of the derivatives of the second most abundant chemical element in the earth's crust, of the order of 27%, silicon (Si).
How are elements with similar properties displayed in the periodic table?
Answers
How many grams of titanium (Ti, 47.90 g/mol) are in an instrument gear with 5.74x10^22 atoms of Ti
Answers
Mass = 45.64 g
Solution:
First of all calculate number of moles for given number of atoms,
As,
6.022 × 10²³ atoms = 1 Mole
So,
5.74 × 10²² atoms = X Moles
Solving for X,
X = (1 mol × 5.74 × 10²² atoms) ÷ 6.022 × 10²³ atoms
X = 0.953 Moles
Now converting moles into mass,
As,
Moles = Mass / M.mass
So,
Mass = Moles × M.Mass
Putting Values,
Mass = 0.953 mol × 47.90 g.mol⁻¹
Mass = 45.64 g
Answer:
Grams of Ti = 4.56 g
Explanation:
Given:
# atoms of Titanium = 5.74*10²²
To determine:
The mass of Ti in corresponding to the given number of atoms
Explanation:
1 mole of any substance contains Avogadro's number of atoms.
i.e. 1 mole of Ti = 6.023*10²³ atoms
Since 1 mole Ti = 47.90g,
47.90 g of Ti contains 6.023*10²³ atoms
Therefore, [tex]= \frac{5.74*10^{22} atoms*47.90g}{6.023*10^{23} atoms} =4.56\ g[/tex] of Ti would correspond to:
The agricultural practice of spraying insecticides leaves behind which pollutant in the soil? A. Chemical poison B. Excess nitrogen C. Excess salt D. Acidic compounds
Answers
A. Chemical poison
Answer:The correct answer is option A
Explanation:
The spraying of insecticides not only kills the insects harming the crops but also damages the fertility of the soil.
Development of new chemicals which are used as insecticides has polluted the soil with dangerous chemicals which are poisonous for living organism.
Extensive use of these chemicals has introduced these chemicals in the food chain and food web causing harm to living beings.
What is the molarity of a solution that contains 20.45 g of sodium chloride (NaCl) dissolved in 700.0 mL of solution?
Answers
the mass of NaCl added - 20.45 g
number of moles of NaCl - 20.45 g / 58.5 g/mol = 0.350 mol
volume of the solution is 700.0 mL
since molarity is the number of moles in 1000 mL
and if 700.0 mL contains - 0.350 mol
therefore 1000 mL contains - 0.350 mol / 700.0 x 1000 = 0.500 mol
hence molarity of solution is 0.500 M
Describe one way to prove that a mixture of sugar and water is a solution and that a mixture of sand and water is not a solution.
Answers
Answer:
The solution is always homogeneous mixture and transparent through which the light can travel. The mixture of water and sugar is a solution because sugar is soluble in water and form homogeneous mixture while the sand can not dissolve in water and sand particles scatter the light.
Explanation:
Solution:
"The solution is always homogeneous mixture and transparent through which the light can travel"
The mixture of water and sugar is a solution because sugar is soluble in water and form homogeneous mixture. The solubility of sugar is high as compared to the sand in water because the negative and positive ends of sucrose easily dissolve into the polar solvent i.e, water
Suspension:
"Suspension is the heterogeneous mixture, in which the solute particles settle down but does not dissolve"
The mixture of water and sand is suspension. The sand can not dissolve in water because it is mostly consist of quartz. The nonpolar covalent bonds of sand are too strong and cannot be break by water molecules.
An 80.0 g sample of iodine-131 was placed in a sealed vessel forty days ago. Only 2.5 g of this isotope is now left. What is its half-life?
Answers
the answer on edg is 8 days
If hexane (c6h14), octane (c8h18), and octanol (c8h17oh) are heated evenly at different altitudes, rank them according to the order in which you would expect them to begin boiling.
Answers
At different altitudes the Hexane will boil first, followed by octane and octanol will boil at last.
Explanation:
The difference in the boiling point of these compounds is mainly due to difference in the intermolecular interactions found in them.
Hexane boils first as compared to other two because the interactions present in it are London Dispersion forces which is too present in octane but weaker than octane as the strength of London Dispersion forces increases with increase in carbon chain.
Octanol will have the greatest boiling point because it also has Hydrogen bond interactions along with London Dispersion forces which are considered the strongest intermolecular forces.
According to the law of conservation of mass,why is it considered a mistake to add calcium to the product side if it is not in the reactant side of a particular chemical equation
Answers
What will happen to the volume if the number of moles of a gas is decreased at constant temperature and pressure? The volume will increase. The volume will decrease. The volume will remain the same. The volume will be negative.
Answers
Answer:
The volume will decrease.
Explanation:
The number of moles of a gas is directly proportional to its volume according to Avogadro's law. Hence volume increases as number of moles increases. Volume also decreases as number of moles decreases.
Hence according to the question, when the number of moles of a gas decreases, the volume of the gas also decreases along side in obedience to the Avogadro's law.
what is an ideal gas? how many ideal gases are there in the universe?
Answers
Not exactly sure about the amount...
I hope this helps! :)
An ideal gas is a theoretical concept used to understand gas behavior. Real gases do not behave exactly like ideal gases but can approach ideal behavior at low pressures. No ideal gases exist in the universe.
An ideal gas is a theoretical concept used to understand the behavior of gases. It is a hypothetical gas that obeys the ideal gas equation of state and follows the kinetic theory of gases.
No real gas behaves as an ideal gas, but at low pressures, gases tend to behave more like ideal gases.
There are no ideal gases in the universe as they are a theoretical construct and do not correspond to any real system.
Ha is a monoprotic weak acid. if a 0.015 m ha solution is 2.5% dissociated (or ionized), what is the acid dissociation constant (ionization constant)?
Answers
To calculate the acid dissociation constant ([tex]K_a[/tex]) for a 0.015 M HA weak acid solution that is 2.5% dissociated, we use the concentrations of the ionized and non-ionized forms of the acid and plug them into the [tex]K_a[/tex] expression, which gives an approximate value of [tex]9.58 \times 10^{-6}[/tex].
To find the acid dissociation constant ([tex]K_a[/tex]) for the weak acid HA that is 2.5% dissociated in a 0.015 M solution, we can apply the definition of the dissociation constant. The dissociation of HA can be represented as:
HA <=> [tex]H^+[/tex](aq) + [tex]A^-[/tex](aq)
Since HA is a monoprotic acid and 2.5% dissociated, this means that:
0.025 x 0.015 M = [[tex]H^+[/tex]] = [[tex]A^-[/tex]]
0.015 M - 0.025 x 0.015 M = [HA]
We plug these values into the equation for [tex]K_a[/tex]:
[tex]K_a[/tex] = [[tex]H^+[/tex]][[tex]A^-[/tex]] / [HA]
By calculating the concentrations:
[[tex]H^+[/tex]] = [[tex]A^-[/tex]] = 0.000375 M (since 2.5% of 0.015 M)
[HA] = 0.015 M - 0.000375 M = 0.014625 M
Substitute them into the equation for [tex]K_a[/tex]:
[tex]K_a[/tex] = (0.000375 M × 0.000375 M) / 0.014625 M
This gives us:
[tex]K_a[/tex] = [tex]9.58 \times 10^{-6}[/tex]
So, the acid dissociation constant for HA is approximately [tex]9.58 \times 10^{-6}[/tex].
Amino acids are monomers that join together in complex macromolecules called _____.
A.
phospholipids
B.
proteins
C.
carbohydrates
D.
polysaccharides
Answers
Amino acids are building blocks in
proteins.
Proteins play numerous roles in cellular processes.
Amino acids combine to form complex macromolecules called proteins. Other listed macromolecules - phospholipids, carbohydrates, and polysaccharides - are not made from amino acids.
Explanation:Amino acids are the building blocks of proteins. They join together in a specific sequence to form these complex macromolecules. In the list provided, the correct answer is 'B. Proteins'. This is because phospholipids, carbohydrates, and polysaccharides are different types of macromolecules constructed from other monomers, not amino acids. The resulting protein structure determines its function in an organism.
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Reacting 35.4 ml of 0.220 m agno3 with 52.0 ml of 0.420 m k2cro4 results in what mass of solid formed
Answers
Chemical reaction: 2AgNO₃(aq) + K₂CrO₄(aq) → Ag₂CrO₄(s) + 2KNO₃(aq).
n(AgNO₃) = c(AgNO₃) · V(AgNO₃).
n(AgNO₃) = 0.220 M · 0.0351 L.
n(AgNO₃) = 0.0078 mol; limiting reactant.
n(K₂CrO₄) = 0.420 M · 0.052 L.
n(K₂CrO₄) = 0.022 mol.
From chemical reaction: n(AgNO₃) : n(Ag₂CrO₄) = 2 : 1.
n(Ag₂CrO₄) = 0.0078 mol ÷ 2.
n(Ag₂CrO₄) = 0.0039 mol.
m(Ag₂CrO₄) = 0.0039 mol · 331.73 g/mol.
m(Ag₂CrO₄) = 1.29 g.
Nuclear power plants produce a waste product of cesium-137, which has a half-life of 30 years. how long would it take for the cesium to decay to 1/8 of its original amount?
Answers
[tex] \frac{1}{8} m(initial)=m(initial)*( \frac{1}{2})^{ \frac{time}{halg-life} } [/tex]
[tex] \frac{1}{8} = \left( \frac{1}{2} \right)^{\frac{time}{30} } [/tex]
[tex]( \frac{1}{2})^{3}= (\frac{1}{2} )^{ \frac{time}{30}} \\ \\ 3= \frac{time}{30} \\ \\ time = 90 (years)[/tex]
Answer:
90 years
Explanation:
it takes three halves of one to get to 1/8.
So 30 times 3 = 90