Answer:
Neutron
Explanation:
Neutrons has a neutral or no charge.
At constant current is passed through an electrolytic cell containing molten MgCl2 for 18 hr. if 4.8 x 105 g of Cl2
are obtained. Calculate the current in Amperes.
The current passing through the electrolytic cell is approximately 2.02 x 10^4 Amperes.
To calculate the current in amperes, we need to use Faraday's laws of electrolysis and the stoichiometry of the reaction.
Faraday's laws state that the amount of substance produced or consumed during electrolysis is directly proportional to the quantity of electricity passed through the cell. The relationship is given by:
Q = nF
Where Q is the electric charge in coulombs (C), n is the number of moles of substance involved in the reaction, and F is Faraday's constant, which is equal to 96,485 C/mol.
In this case, the substance being produced is Cl2, and we know the mass of Cl2 produced, which is 4.8 x 10^5 g.
First, we need to calculate the number of moles of Cl2 produced:
Molar mass of Cl2 = 35.45 g/mol
Moles of Cl2 = mass / molar mass = (4.8 x 10^5 g) / (35.45 g/mol) ≈ 1.354 x 10^4 mol
Now we can calculate the quantity of electricity passed through the cell using Faraday's laws:
Q = nF
Q = (\(1.354 x 10^4\)mol) * (96,485 C/mol)
Q ≈ 1.308 x 10^9 C
The quantity of electricity is given in coulombs. To find the current, we need to divide this value by the time in seconds.
Given that the time is 18 hours, we convert it to seconds:
Time = 18 hours * 60 minutes/hour * 60 seconds/minute
Time = 6.48 x 10^4 seconds
Finally, we can calculate the current:
Current (I) = Q / Time
I = (1.308 x 10^9 C) / (6.48 x 10^4 s)
I ≈ 2.02 x 10^4 Amperes
Therefore, the current passing through the electrolytic cell is approximately 2.02 x 10^4 Amperes.
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A 3.69 g
sample of a compound consisting of carbon, hydrogen, oxygen, nitrogen, and sulfur was combusted in excess oxygen. This produced 2.08 g
CO2
and 1.28 g
H2O
. A second sample of this compound with a mass of 4.65 g
produced 4.77 g
SO3
. A third sample of this compound with a mass of 8.62 g
produced 3.48 g
HNO3
. Determine the empirical formula of the compound. Enter the correct subscripts on the given chemical formula.
The empirical formula of the compound is C₂H₁₆S₂N₃O.
What is the empirical formula of the compound?The moles of each element is as follows::
For CO₂:
Carbon (C) has a molar mass of 12.01 g/mol.
Oxygen (O) has a molar mass of 16.00 g/mol.
Moles of C in CO₂ = 2.08 g / 12.01 g/mol = 0.173 moles
Moles of O in CO₂ = 2.08 g / 16.00 g/mol = 0.130 moles
For H₂O:
Hydrogen (H) has a molar mass of 1.01 g/mol.
Oxygen (O) has a molar mass of 16.00 g/mol.
Moles of H in H₂O = 1.28 g / 1.01 g/mol = 1.27 moles
Moles of O in H₂O = 1.28 g / 16.00 g/mol = 0.080 moles
For SO₃:
Sulfur (S) has a molar mass of 32.06 g/mol.
Oxygen (O) has a molar mass of 16.00 g/mol.
Moles of S in SO₃ = 4.77 g / 32.06 g/mol = 0.149 moles
Moles of O in SO₃ = 4.77 g / 16.00 g/mol = 0.298 moles
For HNO₃:
Hydrogen (H) has a molar mass of 1.01 g/mol.
Nitrogen (N) has a molar mass of 14.01 g/mol.
Oxygen (O) has a molar mass of 16.00 g/mol.
Moles of H in HNO₃ = 3.48 g / 1.01 g/mol = 3.45 moles
Moles of N in HNO₃ = 3.48 g / 14.01 g/mol = 0.248 moles
Moles of O in HNO₃ = 3.48 g / 16.00 g/mol = 0.217 moles
The simplest whole-number ratio of the elements will be:
Carbon: 0.173 moles / 0.080 moles ≈ 2.16
Hydrogen: 1.27 moles / 0.080 moles ≈ 15.88
Sulfur: 0.149 moles / 0.080 moles ≈ 1.86
Nitrogen: 0.248 moles / 0.080 moles ≈ 3.10
Oxygen: 0.080 moles / 0.080 moles = 1
Therefore, the empirical formula is C₂H₁₆S₂N₃O.
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An atom with 14 protons, 14 neutrons, and 16 electrons is stable, -2 charge
stable, +2 charge
unstable, -2 charge
unstable, no charge *
We can see that an atom with 14 protons, 14 neutrons, and 16 electrons is unstable, and has a -2 charge.
So the correct option is the third one.
What can we say about the atom?An atom with 14 protons, 14 neutrons, and 16 electrons is not stable. The number of protons in an atom, also known as its atomic number, determines its element and its chemical properties. In this case, the atom has 14 protons, which corresponds to the element silicon (Si) on the periodic table.
For an atom to be stable, it should have a balanced number of protons and electrons. Electrons are negatively charged particles that orbit the nucleus of an atom in energy levels or electron shells. The number of electrons in a stable atom should be equal to the number of protons, resulting in a neutral charge overall.
In this case, the atom has 14 protons and 16 electrons, which means it has two more electrons than protons, resulting in a net charge of -2. This is an example of an ion.
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4. If you had.35 grams of chloric acid, how many molecules would you have?
Answer:
.4 moles
Explanation:
this is if it's 35 grams
the first liquid that comes out of a woman's breast after delivery is called?
The first liquid (milk) that comes out of a woman's breast after delivery is called \(\sf\purple{colostrum}\).
\(\large\mathfrak{{\pmb{\underline{\orange{Happy\:learning }}{\orange{!}}}}}\)
what is environmentally sustainable society?
Answer:
Meets the current and future basic resource needs of its people in a just and equitable manner without compromising the ability of future generations.
Explanation:
$100, saying that it's a gold nugget. You pull out your old geology text and
look up gold in the mineral table, and read that its density is 19.3 g/cm3. You
measure the cube and find that it is 5 cm on each side, and has a mass of 2.413 kg.
What is its density? Is it gold? Should you buy it?
Answer:
The density of the nugget is 19.3g/cm³
It is gold because all samples of gold will have the same density value
You should buy it.
Explanation:
Given parameters:
Density of gold = 19.3g/cm³
Length on all sides = 5cm
Mass in kg = 2.413kg
Unknown:
Density = ?
Is it gold = ?
Should you buy it = ?
Solution:
To solve this problem, we need to find the density of the nugget first.
Density = \(\frac{mass}{volume}\)
Mass = 2.413kg
We need to convert to g:
1kg = 1000g
2.413kg = 2413g
Volume = L³ = 5³ = 125cm³
Therefore;
Density = \(\frac{2413}{125}\) = 19.3g/cm³
The density of the nugget is 19.3g/cm³
It is gold because all samples of gold will have the same density value
You should buy it.
Please Help!! Balancing Redox Reactions Worksheet questions 4-7 (see attached)
The balanced redox reaction in the chemical reaction is given below:
40H2S + 48H+ + 16MnO4¯ ---> 5S8 + 16Mn2+ + 64H2O
Balancing the redox reaction:
Solution:
1) Half-reactions:
H2S ---> S8
MnO4¯ ---> Mn2+
2) Balance:
8H2S ---> S8 + 16H+ + 16e¯
5e¯ + 8H+ + MnO4¯ ---> Mn2+ + 4H2O
3) Make the number of electrons equal (note that there are no common factors between 5 and 16 except 1):
40H2S ---> 5S8 + 80H+ + 80e¯ <--- factor of 5
80e¯ + 128H+ + 16MnO4¯ ---> 16Mn2+ + 64H2O <---
factor of 16
4) Thus, the final answer is given below;
40H2S + 48H+ + 16MnO4¯ ---> 5S8 + 16Mn2+ + 64H2O
What is oxidation-reduction reaction?Oxidation-reduction can simply be defined as a special type of chemical reaction in which the oxidation states of the substrate change.
So therefore, the balanced redox reaction in the chemical reaction is given below:
40H2S + 48H+ + 16MnO4¯ ---> 5S8 + 16Mn2+ + 64H2O
Complete question:
Balance the following redox reaction:
MnO4¯ + H2S ---> Mn2+ + S8
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Given the thermochemical equation:
4 AlCl3 (s) + 3 O2 (g) ⇒ 2 Al2 03 (s) + 6 Cl2 (g) ; ΔH = -529 kJ
Find ΔH for the following reaction:
1) 3 Al2O3 (s) + Cl2 (g) ⇒ 2/3 AlCl3 (s) + 1/2 O2 (g) ΔH= ?kJ
2) 88.2 kJ
b) 264.5 kJ
c) 529 kJ
d) 176.3 kJ
e) - 176.3 kJ
A thermochemical equation can be written by expressing the heat evolved or absorbed in terms of the enthalpy change ΔH. Here ΔH for the following reaction +88.2 kJ. The correct option is A.
A chemical equation which indicates the heat change occuring during the reaction is defined as the thermochemical equation. In thermochemical equations, physical states of the reactants and products should be specified.
Here the given reaction 4 AlCl₃ (s) + 3 O₂ (g) ⇒ 2 Al₂O₃ (s) + 6 Cl₂ (g) is reversed as 1 /3 Al₂O₃ (s) + Cl₂ (g) ⇒ 2/3 AlCl₃ (s) + 1/2 O₂ (g) and multiplied by 1/6.
So the new enthalpy is +88.16 ≈ 88.2 kJ
Thus the correct option is A.
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Complete the statement of equality.
Answer:
This is not a viable question.
Explanation:
7. A substance that had a mass of 786 grams and it was found that there were
17.86 moles was regularly used by firefighters. What is the identity?
Mass, moles and the use by firefighters are not sufficient to determine the identity of a substance. To identify a substance, more information such as chemical and physical properties, chemical reactions, and spectral data are typically required.
What is mass and mole?Mass is a scalar quantity that measures the amount of matter in an object. It is typically measured in units of grams (g) or kilograms (kg). The mass of an object does not change with location, unlike weight which does change with the gravitational force acting upon it.Moles (mol) is the unit of measurement for amount of substance. It is defined as the amount of a substance that contains the same number of entities (such as atoms, molecules, or ions) as there are in 12 grams of pure carbon-12. Moles can be used to express the concentration of a solution, the number of atoms in a sample, or the amount of material in a reaction.The number of moles can be calculated by dividing the mass of a substance by its molar mass (the mass of one mole of the substance).To learn more about mass and mole refer:
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A 2.64 L aqueous solution of KOH. The solution has a density of 1.29 g/mL.
Calculate the molarity, Molality, and mass percent concentration of the solution.
The molarity of the solution is 0.023 M and the molality of the solution is 17.9 m.
What is the molality?The concentration of a solution is defined as the amount of substance in a solution. Now we are told that we have a solution of 2.64 L aqueous solution of KOH. The solution has a density of 1.29 g/mL.
Density of the solution = 1.29 g/mL
Volume of the solution = 2.64 L
mass of the solution = 1.29 g/mL * 2.64 L = 3.4 g
Number of moles of the solute = 3.4 g/56 g/mol = 0.061 moles
Molarity = 0.061 moles/2.64 L = 0.023 M
Molality of the solution = 0.061 moles/3.4 * 10^-3 Kg = 17.9 m
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What is the density of an object that has a mass of 1.08 kg and displaces 50.50 cm3 of water? (Please report your answer in g/cm3 ) Please report your answer in decimal notation not scientific notation the computer will mark it incorrect.
Answer:
Explanation:
1.08kg/50.5 cm^3(1000g/kg)=21.386 g/cm^3
Answer:
\(\boxed {\boxed {\sf 21.4 \ g/cm^3}}\)
Explanation:
We are asked to find the density of an object.
The density of a substance is its mass per unit volume. It is calculated by dividing the mass by the volume.
\(\rho= \frac{m}{v}\)
The mass of the object is 1.08 kilograms. The object displaced 50.50 cubic centimeters of water, so this value is its volume.
We are asked to give the density in grams per cubic centimeter, so we must convert the mass. There are 1000 grams in 1 kilogram. Set up a conversion factor.
\(\frac {1000 \ g}{1 \ kg}\)
Multiply by the given mass: 1.08 kg
\(1.08\ kg *\frac{1000 \ g }{ 1\ kg}\)
The units of kilograms cancel.
\(1.08*\frac{1000 \ g }{1}\)
\(1.08*{1000 \ g } = 1080 \ g\)
Now we know the mass in grams and the volume:
m= 1080 g v= 50.50 cm³Substitute the values into the density formula.
\(\rho= \frac{1080 \ g }{50.50 \ cm^3}\)
Divide.
\(\rho= 21.3861386 \ g/cm^3\)
The original measurements of mass and density have 3 and 4 significant figures. Our answer must have the least number of significant figures, or 3.
For the number we found, that is the tenths place. The 8 in the hundredth place tells us to round the 3 in the tenths place up to a 4.
\(\rho \approx 21.4 \ g/cm^3\)
The density of the object is approximately 21.4 grams per cubic centimeter.
What is the arrangement of the modern periodic table based upon
Answer:
The modern table is a list of elements based on the number of protons in the nucleus.
Explanation:
That’s the positive charge of the nucleus. Then it is organised into rows and columns based on repeating patterns of chemical similarity within that series, other words “periodicity”. That is why it is called the periodic table.
What is an extended structure? How do extended structures make up substances
Which of the following is true for polar jet streams?
They bring cool air.
They bring warm air.
They blow at the equator.
They blow from north to south.
Answer:
A: They bring cool air.
Explanation:
Took the test and got it correct. :)
Jet streams are fast flowing meandering air currents. Polar jet streams bring cool air through the atmosphere. Polar jets meet subtropical jets at some regions.
What are polar jet streams ?The polar jet stream, which travels through the lower layers of the atmosphere in the Northern Hemisphere, is a swiftly moving band of westerly winds.
The confluence of warm air ascending from the tropics and cold air masses descending from the arctic produces the jet. The denser cold air lowers and deflects the warmer air areas north, creating deep troughs and steep ridges that give the jet stream its wavy appearance.
As pockets of cold air intermittently sneak down from the Arctic, this pattern spreads across the mid-latitudes of North America, Europe, and Asia, producing opposing waves and flows that speed eastward due to the earth's rotation.
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0.5 moles of CO2 have a volume of 50 L and a pressure of 0.8210 atm. What must be the temperature of the gas?
Answer:
1000 K
Explanation:
Given data
Moles of carbon dioxide (n): 0.5 molesVolume of carbon dioxide (V): 50 litersPressure of carbon dioxide (P): 0.8210 atmospheresTemperature of carbon dioxide (T): ?We can find the temperature of carbon dioxide using the ideal gas equation.
\(P \times V = n \times R \times T\\T = \frac{P \times V}{n \times R} = \frac{0.8210atm \times 50L}{0.5mol \times \frac{0.08206atm.L}{mol.K} }=1000 K\)
The temperature of the gas is 1000 K.
What are space stations used for?
Answer:
lt serves as a home where crews of astronauts and cosmonauts live. The space station is also a unique science laboratory. Several nations worked together to build and use the space station. The space station is made of parts that were assembled in space by astronauts.
Explanation:
What does a sound wave’s frequency tell you? HELP IF YOU WANT BRAINLEIST AND TO HAVE YOUR COMMENT LIKED!!
A. the loudness or softness of the sound from an object
B. the type of medium in which the sound is traveling
C. the number of vibrations per second an object is making
D. the amplitude of the sound wave
Answer:
I am pretty sure it is C.
Explanation:
Because the wave frequency's tell us the number of waves there are on that diagram.
Answer:
C. the number of vibrations per second an object is making
Explanation:
Hope this helps. Sorry if it doesn't. T^T
write the structural formula for 2-bromo-3-chloro-4,4-dimethylpentanal
Answer:
Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO
Explanation:
The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.
The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.
The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.
The methyl groups are non-polar and do not have any significant reactivity.
The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.
The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.
We have been thinking about two claims that are possible explanations for how the channel on Mars was formed. We have considered evidence from images, as well as from the Flowing Water Model and the Flowing Lava Model.
1. Select the claim you think is best supported by the evidence you have seen so far.
Responses
Claim 1: Flowing water formed the channel on Mars.
Claim 1: Flowing water formed the channel on Mars.
Claim 2: Flowing lava formed the channel on Mars.
Claim 2: Flowing lava formed the channel on Mars.
2. Why do you think the claim you selected is best supported by the evidence?
The claim that can be supported is that the channels in mars are made by the flow of lave and not by water. Thus, claim 2 is supportive.
What is channels in mars?According to the new studies of the surface features of mars there are some channels found through the plates of mars. At least one of the meandering channels on the surface of Mars can possibly be explained by the fact that flowing lava can create or carve patterns that resemble the riverbeds and canyons cut by water.
NASA delivered this talk on these findings on March 4, 2010, at the 41st Lunar and Planetary Science Conference at NASA's Goddard Space Flight Center in Greenbelt, Maryland.
The possibility of discovering life on Mars is supposed to be affected by the question of whether the channels on Mars were produced by lava or by water.
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Is gold's atomic structure bigger then tins?
Gold's atomic construction is bigger than tin because of the existence of more protons and neutrons.
What is the atomic structure of a gold atom?The disposting of atoms in gold follows what's called a "face-centered cubic" (fcc) structure. Put directly, the atoms in gold form cubes, with an atom at each of the districts, and another atom in the center of each of the faces (you can see what this looks like in the image below). Gold is an element.
An atom of gold carries 79 protons, 79 electrons, and (most commonly) 118 neutrons, making it among the dense of naturally happen. Gold is a chemical element with 79 protons in each atomic nucleus. Every atom carrying 79 protons is a gold atom and all gold atoms.
So we can conclude that gold has the chemical formula Au. Gold atoms join together in a giant metallic structure. Atomic Structure.
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The decomposition of HI(g) at 298 K is represented by the equilibrium equation above. When 100. torr of HI(g) is added to a previously evacuated, rigid container and allowed to reach equilibrium, the partial pressure of I2(g) is approximately 3.7 torr. If the initial pressure of HI(g) is increased to 200. torr and the process is repeated at the same temperature, which of the following correctly predicts the equilibrium partial pressure of I2(g), and why?
answer choices
PI2 ≈ 14 torr, because it is directly proportional to the square of the initial pressure of HI.
PI2 ≈ 0.073 torr, because it is inversely proportional to the square of the initial pressure of HI.
PI2 ≈ 7.4 torr, because it is directly proportional to the initial pressure of HI.
PI2 ≈ 1.9 torr, because it is inversely proportional to the initial pressure of HI.
7.4 torr for PI2. Due to its direct proportionality to the initial pressure of HIHI, PI2 7.4 torrs.
The forward and reverse reactions happen simultaneously when the system is in equilibrium. Each reactant and product are present in equal amounts once equilibrium has been attained. The relationship between the concentrations of the reactants and the products is mathematically represented by the equilibrium constant equation.
The equilibrium state is the state of a system whose attributes are constant under constant external conditions. Even after equilibrium has been reached, reactants and products continue to change, making chemical equilibria dynamic in nature. However, the reaction time for moving forward and backward is the same. Balance examples include Placed on the table was a book. a vehicle that travels at a fixed speed. a chemical process where the rates of the forward and reverse reactions are equivalent.
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The balanced equation for the neutralization reaction of aqueous H₂SO₄ with aqueous KOH is shown.
H₂ SO₄ (aq) +2 KOH(aq) →2H₂ O(l)+K₂ SO₄ (aq)
What volume of 0.240 M KOH is needed to react completely with 11.4 mL of 0.110 M H₂ SO₄ ?
The volume of 0.240 M KOH that is needed to react completely with 11.4 mL of 0.110 M H₂SO₄ is 10.45mL.
How to calculate volume?The volume required by a solution to react with a substance can be calculated using the following formula:
CaVa/CbVb = Na/Nb
Where;
Cb = molarity of baseCa = molarity of acidVa = volume of acidVb = volume of baseNa = number of moles of acidNb = number of moles of baseAccording to this question, a neutralization reaction occurs between aqueous H₂SO₄ and aqueous KOH as follows:
H₂SO₄(aq) +2KOH(aq) → 2H₂O(l) + K₂SO₄(aq)
If 0.240M KOH is needed to react completely with 11.4mL of 0.110M H₂SO₄, the volume of KOH needed can be calculated as follows:
11.4 × 0.110/0.240 × Vb = 1/2
1.254/0.240Vb = 1/2
1.254 × 2 = 0.240Vb
Vb = 2.508 ÷ 0.240
Vb = 10.45mL
Therefore, 10.45mL is the volume of the base needed to neutralise the acid.
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Use Hess's law to calculate AG° rxn using the following information.
CO(g) → C(s) + 1/2O2(g)
AG'Ixn = ?
CO₂(g) → C(s) + O2(g)
CO(g) + 1/2O2(g) → CO₂(g)
AG rxn=+394.4 kJ
AG rxn=-257.2 kJ
Answer:
AG rxn=+394.4 kJ
Explanation:
What are the different layers of the earth and how do they interact.
Answer: The crust and the upper layer of the mantle together make up a zone of rigid, brittle rock called the Lithosphere . The layer below the rigid lithosphere is a zone of asphalt-like consistancy called the Asthenosphere . The asthenosphere is the part of the mantle that flows and moves the plates of the Earth.
Explanation:
30 points!!!!
2K + 2H2O → 2KOH + H2
This reaction shows which detail about potassium and hydrogen?
Hydrogen is more reactive than potassium.
Potassium and hydrogen form ionic bonds.
Potassium is more reactive than hydrogen.
Potassium and hydrogen form covalent bonds
Answer:
2K + 2H2O → 2KOH + H2
So Hydrogen is more reactive than pottasium .
According to law of conservation of matter, 2 moles of potassium react with water to produce 1 mole of hydrogen gas.So, 2 moles of potassium produce 1 mole of hydrogen gas.Answer:
A
Explanation:
Hydrogen is more reactive than potassium.
How do scientists model the particles in the states of matter (What do particles look like in a model)?
A block of metal has a volume of 14.0in3 and weighs 5.16 lb .
What is its density in grams per cubic centimeter?,
The density of metal block in grams per cubic centimeter is 10.70 g/cm³.
Given,
Mass of metal block = 5.16 lb
1 lb = 453.592 g
5.26 lb = 2340.536 g
The volume of metal block = 14 in 3
1 in = 2.5 cm
1 in 3 = 15.625 cm³
14 in 3 = 218.75 cm³
Density is defined as the mass per unit volume of a substance. Or, it is the ratio of mass to the volume of the substance.
As we know,
Density = mass/volume
Or, density = 2340.536 / 218.75
Or, density = 10.70 g/cm³
Therefore, the density of the metal block is 10.70 g/cm³.
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Strontium-90, a radioactive isotope with applications in medicine, has a half-life of approximately 30 years. Out of a 100-gram sample, approximately how much remains after 170 years? 2 grams 8 grams 17 grams 81 grams
There are 2 grams remain
Further explanationGiven
t1/2 = 30 years
t = 170 years
No = 100 g
Required
Remaining sample
Solution
General formulas used in decay:
\(\large{\boxed{\bold{N_t=N_0(\dfrac{1}{2})^{t/t\frac{1}{2} }}}\)
Input the value :
\(\tt Nt=100.\dfrac{1}{2}^{170/30}\\\\Nt=1.969\approx 2~grams\)