Banded iron formations are made of minerals like iron-rich silicates and iron-rich carbonates.
What is banded iron?
Banded iron is the sedimentary rocks that are formed by the iron-rich contents and iron-rich carbonates and silicates. These minerals are hematite and magnetite.
The organisms that release oxygen are converted into iron oxides underwater, and they form sedimentary rocks like banded iron. The oxides are composed on the ocean floor, and they turn into rocks.
Thus, the correct minerals for banded iron formation are iron-rich silicates and iron-rich carbonates.
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Which of the following best compares a fission reaction and a fusion reaction?
A.Both reactions absorb energy; in a fission reaction, two smaller atoms combine to form one larger atom, while in a fusion reaction, one large atom splits into smaller atoms.
B.Both reactions absorb energy; in a fission reaction, one atom splits into two smaller atoms, while in a fusion reaction, two smaller atoms combine to form one larger atom. C.Both reactions release energy; in a fission reaction, two smaller atoms combine to form one larger atom, while in a fusion reaction, one large atom splits into smaller atoms.
D.Both reactions release energy; in a fission reaction, one atom splits into two smaller atoms, while in a fusion reaction, two smaller atoms combine to form one larger atom.
Answer:
D.
Explanation:
Determine the excess reactant and calculate the mass of the remaining excess reactant after 20.0 grams of al and 10.0 grams of o2 react.
The reactant in excess is Al (s)
The mass of remaining surplus reactant is 8.76 g
According to question
4 moles of aluminium reacts with 3 moles of oxygen, to make 2 moles of alumina.
Molar mass Al: 26.98 g/m
Molar mass O2: 32.00 g/m
Mass / Molar mass: Moles
20 g Al / 26.98 g/m = 0.741 moles 10 g O2/32.00 g/m 0.312 moles =
Let's find out the limiting reactant and reactant in surplus by rules of three: the 4 moles of Al reacts with 3 moles of O2
0.741 moles of Al reacts with (0.741.3)/4 = 0.555 moles
Now we know that are needed 0.555 moles of O2 to consume all the Al but we only have 0.312 moles of O2.
The O2 is the limiting reactant, so the Al is the reactant in excess.
Let's make another rule of three
3 moles of O2 reacts with 4 moles of Al
0.312 of O2 reacts with (0.312 .4)/3 = 0.416
We need 0.416 moles to consume all the O2 and we have 0.741 moles of Al.
When we use 0.416 moles from 0.741 it remains 0.325
0.325 moles . 26.98 g/m = 8.76 grams
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A solution is 0.0480 m lif. what is the molarity of the solution if the density is 1.10 g/ml?
The molarity of the solution is 0.528 mol/L.
Given,
Molarity = 0.0480 LiF.
Density = 1.10 g/ml
0.0480 moles of LiF are present in 1 kg of solvent.
Mass of 0.0480 moles of LiF = zero.0480 mol × 26 g/mol = 1.248 g
Mass of the answer (m)= 1 kg (solvent) + 1.248 g(solute)
m = a thousand g + 1.248 g = 1001.248 g
locating the quantity of the solution,
extent = Mass / density
setting the values of mass and density, we get the quantity,
quantity = 910.2254 mL or, 0.9102254 L
The molarity of the solution is the moles of the compound in a single liter of solutions.
Molarity = mass of compound/ molar mass × volume(L)
via placing the values we get,
Molarity = zero.528 mol/L
as a result the molarity of the answer is zero.528 molar.
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A 59. 4 g sample of the compound x4o6 contains 14. 4 g of oxygen atoms. What is the molar mass of element x?.
The molar mass of element X is 75 g/mol.
m(X₄O₆) = 59.4 g; mass of the compound
m(O) = 14.4 g; mass of oxygen in the compound
n(O) = 14.4 g ÷ 16 g/mol
n(O) = 0.9 mol; amount of oxygen in compound
m(X) = m(X₄O₆) - m(O)
m(X) = 59.4 g - 14.4 g
m(X) = 45.0 g; mass of element X
Ratio of the elements in the compound: n(X) : n(O) = 4 : 6.
n(X) = 0.9 mol × 4 / 6
n(X) = 0.6 mol; amount of element X in the compound
M(X) = m(X) ÷ n(X)
M(X) = 45.0 g ÷ 0.6 mol
M(X) = 75 g/mol; molar mass of element X
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What group is obtained by adding or deleting from each of the following groups the indicated symmetry operation?
a) c3 plus i
b) c3v plus i
c) c3h minus s35
d) c3 plus s6
In the group that is obtained by adding or deleting from each of the following groups, the indicated symmetry operation is c3 plus i. The correct option is a.
What are symmetries?In organic chemistry, the shape of the compounds that are formed is made or discovered. The shape of water molecules, benzene, etc. These structures of symmetries are sent by the connecting or joining of elements with bonds.
Citroën C3 is an organic compound that gives symmetry operation when a group or added or deleted from the compound.
Thus, the correct option is a. c3 plus i.
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3.7+5.894+782.52=
in sig fig rules
In scientific notation, "significant figures" refers to the significant single digits (0 to 9, inclusive) of the coefficient of expression.
What do you mean by significant numbers using an example?A significant figure in a given number is made up of all the certain digits plus one uncertain digit. They are reliant on the scale's or measurement tool's accuracy.
What is the example of significant figure?1. 587 is an example of four important digits (three are certain and one is doubtful).
What is the calculation of the above problem?On solving above problem we get,
3.7 + 5.894 + 782.52
9.594 + 782.52
792.114
792.1
The answer of the above problem is 792.1.
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What parts of polypeptide participate in bonds that hold together secondary structure? tertiary structure?
The parts of polypeptide participate in bonds that hold together secondary structure and tertiary Secondary structure shape is supplied via way of means of hydrogen bonds among atoms withinside the polypeptide spine of proteins. Interactions among the aspect chain atoms of the amino acid subunits shape the confirmation.
The Secondary structure shape includes nearby packing of the polypeptide chain into α-helices and β-sheets via way of means of hydrogen bonding among the peptide bond and the significant carbon spine. Tertiary (3D) shape is the form that outcomes from secondary structural folding decided via way of means of interactions among amino acid aspect chains.
Secondary structure outcomes from hydrogen bonds that shape among atoms withinside the polypeptide spine. A hydrogen bond is shaped among a partially bad oxygen atom and a partially effective nitrogen atom.
The tertiary structure is stabilized via way of means of aspect chain purposeful corporations inclusive of numerous interactions, in particular hydrogen bonds, salt bridges, covalent disulfide bonds, and hydrophobic interactions.
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A solution of h2so4(aq) with a molal concentration of 6.80 has a density of 1.318 g/ml. what is the molar concentration of this solution?
The molal concentration of the solution is 5.38 M.
The molal concentration of sulphuric acid = 6.80 m
The density of the solution = 1.318 g/ml
Mass of the sulphuric acid in the solution is,
[tex] = 6.80 \times 9.80[/tex]
[tex] =666.4 \: g[/tex]
The mass of sulphuric acid present in the solution is 666.4 g.
Let the mass of the solvent in which sulphuric acid is dissolved be 1000 grams.
So the total mass of the solution is,
= Mass of solvent + Mass of sulphuric acid
[tex] = 666.4 \: + \: 1000[/tex]
[tex] = 1666.4 \: g[/tex]
The total volume of the solution is,
[tex] = \frac{1666.4 \times 1}{1.318 \times 1000} [/tex]
[tex] = 1.264 \: L[/tex]
The volume of the solution is 1.264 liters.
The molal concentration of this solution is,
[tex] = \frac{6.80}{1.264} [/tex]
[tex] = 5.38 \: M[/tex]
Therefore, the molal concentration of the solution is 5.38 M.
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21. When a sulfur atom reacts with other atoms, electrons in the atom's third energy level are involved. How many such electrons does a sulfur atom have?
The electrons in the atom's third energy level that are involved in chemical reaction are six in number.
How many electrons does sulfur have?
Sulfur is an element that can be found in group sixteen of the periodic table. It has a valency of two because it has six electrons in the outermost shell and shares two more electrons with another element in order to form a covalent bond.
There are three electron shells that could be found in sulfur. The first shell has two electrons, the second shell has eight electrons while the last shell has six electrons.
As such, the electrons in the atom's third energy level that are involved in chemical reaction are six in number.
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The nuclear envelope differs from the cell membrane and the membranous endoplasmic reticulum because it _____.
The nuclear envelope differs from the cell membrane and the membranous endoplasmic reticulum because it Is a double membrane.
What is the Difference Between Nuclear Membrane and Nuclear Envelope?
Nuclear membrane and nuclear envelope vary primarily in that nuclear membrane serves as a barrier that selectively separates nucleoplasm from cytoplasm, whilst nuclear envelope serves as a structure that separates the nucleus's contents from the cytoplasm. Additionally, the nuclear envelope is made up of two nuclear membranes and nuclear pores, whereas the nuclear membrane is a lipid bilayer.
All eukaryotic cells with a nucleus have two structural elements called the nuclear membrane and nuclear envelope.
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How would you prepare 10. 0 ml of a 0. 25% m/v hcl solution if 1% m/v hcl was available? how much 1% m/v hcl is needed? how much distilled water is used?.
To prepare the HCl solution if 1% m/v HCL was available, take 2.5ml of the stock solution and makeup to mark with 7.5 ml of water.
What is HCl?HCl is hydrochloric acid, and it is a highly reactive and strong acid.
Given, the dilution formula
C₁V₁= C₂V₂
C₁ = initial concentration
V₁ = initial volume
C₂ = Final concentration
V₂ = final volume
The values are
C₁ = 1% m/v
V₁ = ?
C₂ = 0.25% m/v
V₂ = 10 ml
V₁ = C₂V₂/C₁
V₁ = 0.25% m/v × 10 ml /1% m/v
V₁ = 2.5 ml
Thus, the amount of HCl is 2.5ml of the stock solution. The amount of water is 7.5 ml of water.
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The atomic number corresponds to the number of ________ in a specific element, while the atomic weight corresponds to the number of ________ in a specific element.
The atomic number and mass number corresponds to the number of electrons and protons in a specific element, while the atomic number and mass number corresponds to the number of nucleons(protons and neutrons) in a specific element.
What is atomic number and mass number?
The number of protons in the nucleus of each element's atoms, represented by the symbol Z, is the element's atomic number. The sum of the protons and neutrons in an element's nucleus is known as the mass number (A).
Thus, atomic no. is the count of electrons or protons in an element whereas, atomic mass or weight refers to the no. of nucleons that is the sum of protons and neutrons in the nucleus of the element.
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A 2. 50 x 10-3 kg sample of oxygen gas at 31. 0 °c has an average molecular velocity of 487 m/s. What is the ke of the gas? report your answer in joules to the nearest whole number.
A 2. 50 x 10-3 kg sample of oxygen gas at 31. 0 °c has an average molecular velocity of 487 m/s then ke of the gas is 5,929.225 J
Here we have to find kinetic energy of gas and sample is given as 2. 50 x 10-3 kg and velocity of 487 m/s so, formula to find kinetic energy is:
KE=1/2mv²
KE=1/2×2. 50 x 10⁻³×(487)²
KE=5,929.225kgm²/s²
Here 1 joule = 1 kgm²/s² so
1×5,929.225=5,929.225 J
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Analyze the diagram showing the changing states of matter. Drag the item from the item bank to its corresponding match.
The correct matches for changes of state are:
1 or 3 : Arrow that shows particles getting closer togethergas: State of matter that would fill any containerliquid: State of matter with definite volume but NOT shape2 or 4: Arrow that shows particles gaining energysolid: State of matter with definite shapeWhat is change of state?Change of state is the process whereby matter in one physical state is converted to matter in another state by the addition or removal of heat.
The process of change of state are:
Melting: solid to liquid due to addition of heatVaporization: liquid to gas due to addition of heatSublimation: solid to gas due to addition of heatFreezing: liquid to solid due to removal of heatCondensation: gas to liquid due to removal of heatDeposition: gas to solid due to removal of heatConsidering the given diagram, the correct matches are:
1 or 3 : Arrow that shows particles getting closer togethergas: State of matter that would fill any containerliquid: State of matter with definite volume but NOT shape2 or 4: Arrow that shows particles gaining energysolid: State of matter with definite shapeIn conclusion, change of state of matter occurs due to heat changes.
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A chemist experiments on a molecule with the formula of c5h10o5. this compound is likely a(n) ________.
A chemist experiments on a molecule with the formula of c5h10o5. this compound is likely a(n) carbohydrates.
A molecule with the formula C₅H₁₀O₅ is carbohydrates.
What are Carbohydrates?
The carbohydrates are represented through the chemical system Cₙ(H₂O)ₓ.C denotes carbon within the components with a few water molecules. hence, carbohydrates mean hydrated carbon as it has some water molecules attached.The ratio of carbon, hydrogen and oxygen in carbohydrates is 1:2:1.Glucose is the maximum plentiful and simple carbohydrate.Monosaccharides and polysaccharides are the 2 kinds of carbohydrates.Carbohydrates are biomolecules.they also offer electricity to living things through numerous meals like bread, and rice, and so forth.therefore the molecular method C₅H₁₀O₅ represents carbohydrates.
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Electrodes have been placed on samantha's scalp. her doctor wants to assess her brain-wave activity through the use of a(n)?
Electrodes have been placed on samantha's scalp. her doctor wants to assess her brain-wave activity through the use of an electroencephalogram, or EEG. An electroencephalogram (EEG) is a test that uses small metal discs (electrodes) connected to the scalp to assess electrical activity in the brain.
Brain cells interact by electrical impulses and are constantly active, even while sleeping. An EEG is a test that detects irregularities in your brain's electrical activity or brain waves. Electrodes comprised of small metal discs with thin wires are deposited onto your scalp during the process. An EEG is primarily used to detect and investigate epilepsy.
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The energy recommendation that describes the proportions of calories that should come from carbohydrate, fat, and protein are the: ______.
a. ears
b. ais
c. amdrs
d. dris
Explanation:
what are you feeling now I am looking forward
When using a water-cooled condenser, the water should_____the condenser. to make this happen, the water should flow in at the____and should flow out at the_____.
A water-cooled condenser must have the water flowing over it continuously to function. The water must enter through the bottom port and exit through the top port for this to occur.
What is condenser?
A device or component used to condense vapor into liquid is a condenser (heat transfer). HVAC air coils are an example of specific sorts. Condenser (laboratory), a group of glassware used in laboratories to cool fluids.
The condenser's job is to take the high-pressure gas coming from the compressor and turn it into a liquid. By using the idea that heat will always travel from a warmer to a cooler substance, it accomplishes this.
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Which compound would be most easily formulated as an aqueous solution used to quickly provide energy to an athlete?
The compound would be most easily formulated as an aqueous solution used to quickly provide energy to an athlete is carbohydrate.
carbohydrate strategy is used for athletes to maximize the storage of energy , in form of glycogen, in muscles. simple carbohydrates are simple sugar such as fructose and glucose.Every athletes anywhere should consume 3 - 12 gm per kilo weight throughout the day, depending on their training routine.
Carbohydrates provide energy for the body including muscles , brain, nerves and other tissues present in body.thus, carbohydrates acts a master fuel in body.
carbohydrates are used for energy (glucose). athlete drinks contain carbohydrates ans electrolytes.
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What reagent or reagents is reuired for the conversion of yclohexene to cycloexane?
Reagents required for conversion of clohexene to cycloexane is H2,Pt.
Functions do reagents serve in chemistry:
A chemical reaction is used to confirm the detection of another substance and is referred to as a "substance or compound that is added to a system in order to bring a chemical reaction or is added to check whether a reaction has occurred or not."
Reagents required for conversion of clohexene to cycloexane is H2,Pt.
Hydrogenation of cyclohexene in presense of Pt catalyst gives cyclohexane .
cyclohexene + H2 -----(Pt)----> cyclohexane .
Pt is acting here as a catalyst.
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is gas occupies 733 cm at 10.9 at what temp will it occupy 950 cm
Temperature of gas at volume of 950 cm³ is 368.14K or 94.99⁰c.
Volume is the amount of space a three-dimensional object takes up, expressed in cubic units.units of volume are mL, liter, cm³ or m³.Given,
in this question, volume occupied by gas at 10.9⁰c is 733cm³.
we have to find out temperature at which gas occupies volume of 950 cm³.
First, convert temperature from celcius to Kelvin
10.9⁰c = 10.9 + 273.15 = 284.05 K
By equation or Boyle's Law
P1 x V1 / T1 = P2 x V2 / T2
Pressure is constant here
therefore, V1 / T1 = V2 / T2
here, V1 = 733 cm³
T1 = 284.05 K
V2 = 950 cm³
we have to find out T2
So, 733 / 284.05 = 950 / T2
T2 = 284.05 × 950 / 733 = 368.14 K
= 94. 99⁰c
Therefore the temperature of gas at volume of 950 cm³ is 368.14K or 94.99⁰c.
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what is the difference between metals and non non metals
...
Answer:
Metals tend to be hard, metallic-looking solids, with high electrical and thermal conductivity values and high melting and boiling points. Nonmetals tend to be softer, often colorful elements. They may be solids, liquids, or gases.
Answer: Metals are hard and have high melting and high boiling points and high electrical and thermal conductivity values and nonmetals are softer and are substances like solids,liquids,or gases.
Restate how a satellite stays in orbit with your own words, as if you were trying to explain the process to a younger friend or sibling
Satellite stays in orbit because of two factors velocity and gravitational pull of Earth.
A rocket fired from the ground with enough power to leave our atmosphere is used to put satellites into orbit.The satellite is dropped into orbit once the rocket arrives at the predetermined location.A satellite can stay in orbit for hundreds of years if it maintains its initial speed once it separates from the launch vehicle.A satellite keeps its orbit in place by balancing the gravitational pull of Earth with its velocity, which is the speed required to move in a straight line. In order to withstand the stronger gravitational attraction, a satellite must circle at a faster pace as it gets closer to the Earth.In short, they hold their place by locking into speeds that are quick enough to overcome gravity's pull downward.Therefore, Satellite stays in orbit.
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In this lab experiment, you will react copper(ii) chloride and aluminum. you will look for clues as to which substance was in excess and which limited the reaction
How can you identify the reactant that is restricting a chemical reaction while watching it take place? ”
What is the real purpose of scientific study?Building scientific knowledge, or discovering rules and positing ideas that may explain natural or social occurrences, is the aim of scientific study. It is crucial to recognize that this knowledge might be inaccurate or perhaps quite distant from the truth.
An experiment is what?A hypothesis, or an anticipation about how a certain process or phenomena operates, is typically the subject of an experiment. However, an experiment may also seek to address a hypothetical issue or support earlier findings without having any preconceived notions about what would be revealed.
Complete question -
In this lab experiment, you will react copper(ll) chloride and aluminum. You will look for clues as to which substance was in excess and which
limited the reaction. Write an investigative question that describes the
scientific goals of this experiment. Make sure that your question applies to any reaction. Investigative Question:
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for number less than 0.1, such as 0.06, the zeros to the right of the decimal point but before the first nonzero digit
For the number less than 0.1 such as 0.006, the zeroes to the right of the decimal point but before the first non zero digit show the decimal place of the first significant digit.
The number that is given as digits is established using significant figures.Any two non-zero digits that are separated by a zero are significant figure.Every zero that is both to the right and left of a non-zero digit and the decimal point is not significant figure. The quantity of significant figures frequently reveals the degree of measurement accuracy. From the first non-zero digits in the figure, we may determine the number of significant figures.There is only one significant figure in the provided number 0.06. The decimal place of the first digit is indicated by the zeros that appear to the right of the decimal point but before the first non-zero digit.
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the rate constant for this first‑order reaction is 0.930 s−10.930 s−1 at 400 ∘c.400 ∘c. a⟶products a⟶products how long, in seconds, would it take for the concentration of aa to decrease from 0.810 m0.810 m to 0.260 m?0.260 m? ????
It would take 1.23 seconds for the concentration of A to decrease from 0.810M to 0.260 M.
Balanced chemical equation: A → product
c₀(A) = 0.810 M; initial concentration of reactant A
c(A) = 0.260 M; concentration of reactant A after time t
k = 0.930 s⁻¹; the rate constant for this first‑order reaction
ln c(A) = ln c₀(A) - k·t; a first-order is proportional to the concentration of the reactant.
t = (ln c₀(A) - ln c(N₂O₅)) ÷ k.
t = (-0.21 + 1.35) ÷ 0.930 s⁻¹.
t = 1.14 ÷ 0.930 s⁻¹
t = 1.23 s; duration of this chemical reaction
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Water has more structure than other liquids because of its ability to form hydrogen bonds. Because of this phenomena, water expresses a relatively high __________, which allows it to cushion and protect the body’s structures.
Water has more structure than other liquids because of its ability to form hydrogen bonds. Because of this phenomenon, water expresses a relatively high density, which allows it to cushion and protect the body’s structures.
Water is a chemical element consisting of hydrogen and oxygen and exists in gaseous, liquid, and solid states. It is one of the most abundant and important compounds. It is a tasteless, odorless liquid at room temperature and has the significant ability to dissolve many other substances.
You may be surprised to learn that most of Liverpool's drinking water comes from two beautiful lakes, Llyn Celyn and Vyrnwy, 80km south of Wales. Both lakes supply millions of gallons of water to the city each day. In humans, it functions as both a solvent and transport mechanism, dissolving essential vitamins and nutrients from food and delivering them to cells. Our bodies also use water to flush out toxins, regulate body temperature, and support metabolism.
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A vacuum gage connected to a chamber reads 54 kpa at a location where the atmospheric pressure is 92 kpa. determine the absolute pressure in the chamber.
The absolute pressure in the chamber is 38 kPa.
p(vacuum gauge) = 54 kPa; pressure of vacuum gauge, pressure is below atmospheric pressure, so it is called negative or vacuum gauge pressure
p(atmospheric pressure) = 92 kPa
p(absolute pressure) = ?
p(absolute pressure) = p(vacuum gauge) - p(atmospheric pressure)
p(absolute pressure) = 92 kPa - 54 kPa
p(absolute pressure) = 38 kPa
Atmospheric pressure or barometric pressure is the pressure within the atmosphere of the Earth.
Absolute pressure is the pressure in a vacuum. Absolute pressure uses absolute zero as its zero point.
Vacuum gauge pressure uses atmospheric pressure as its zero point.
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Gold has a density of 0.01932 kg/cm3. what volume (in cm3) would be occupied by a 22.2 g sample of gold?
A 22.2 g sample of gold with a density of 0.01932 kg/cm3 will occupy a volume of 1.1491 cm3.
Density, denoted by ρ, of a substance is its mass per unit volume. It shows the ratio between a substance mass and the volume it occupies. To solve for density, the formula is given by
ρ = mass / volume
Given a substance density, we can compute for its mass or volume using the same formula and vice versa.
But before inputting the values, convert the mass from g to kg to match the unit of density. (1 kg = 1000g)
mass = 22.2 g = 22.2 / 1000 = 0.0222 kg
To compute for the volume a sample of gold occupies,
volume = mass / ρ
where mass = 22.2 g = 0.0222 kg
ρ = 0.01932 kg/cm3
volume = 0.0222 kg / 0.01932 kg/cm3
volume = 1.1491 cm3
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What does criteria mean in science?
Answer:
a standard by which something may be judged.
Explanation:
