Three 1.0 liter flasks were filled with H2, O2 and Ne, respectively, at STP, the statement true is Each flask has the same number of gas molecules.
STP, or standard temperature and pressure, refers to the nominal atmospheric conditions at sea level. The temperatures and pressures are 0 degrees Celsius and 1 atmosphere, respectively. In addition to other professionals, the STP value is crucial for physicists, chemists, engineers, pilots, and navigators.
STP is frequently used to set standard temperature and pressure conditions, which is crucial for measurements and recording of physical and chemical processes.
It's inversely as important to indicate the applicable reference conditions of temperature and pressure when stating the molar volume of a gas( 41) as it's when expressing a gas volume or volumetric inflow rate. Stating the molar volume of a gas without indicating the reference conditions of temperature and pressure has veritably little meaning and can beget confusion.
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Carbon disulfide burns in oxygen to yield carbon dioxide and sulfur dioxide according to the following chemical equation. CS2 + 3O2 → CO2 + 2SO2
If 1.00 mol CS2 reacts with 1.00 mol O2, identify the limiting reactant.
How many moles of excess reactant remain?
How many moles of each product are formed? (you need to give 2 answers)
In the given reaction, carbon disulfide acts as an excess reagent and oxygen acts as a limiting reagent.
Do the limiting reactant calculation.a) Oxygen is the limiting reactant.
b) 0.667 moles of carbon disulfide will still be present.
c) The formation of 0.333 moles of carbon dioxide and 0.667 moles of sulfur dioxide.
provided here,
To make 1 mole of carbon dioxide and 2 moles of sulfur dioxide from 1 mole of carbon disulfide, 3 moles of oxygen are required.
1.00 ol of carbon disulfide is the number of moles.
One mole of oxygen is equal to 1.00 mol.
The limiting reactant is oxygen. It will be totally eaten. (1.00 mol).
(B) An excess reactant is carbon disulfide. It will respond with
Oxygen reacts with 0.33 moles of carbon disulfide.
The extra reagent still present:
0.667 moles There will be a residue of carbon disulfide.
Determine the moles of each product:In order to make one mole of carbon disulfide and one mole each of carbon dioxide and sulfur dioxide, you need three moles of oxygen.
The carbon dioxide equivalent for 1 mole of oxygen is 1 mole/3, or 0.333 moles.
Sulfur dioxide is equal to 0.667 moles per 1.00 mol of oxygen (1.00 mol/(3/2)) mol.
Since carbon disulfide is an excess reagent in the above reaction, oxygen is a limiting reagent.
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Consider the ion 41Ca2+, which is calcium-41 with a +2 charge.
How many protons and electrons are there?
How many neurons and mass number are there?
1) There are 18 electrons and 20 protons
2) There are 21 neutrons hence the mass number is 41
How is an ion made from an atom?An ion is created when an atom gains or loses one or more electrons. An atom is composed of a nucleus, which contains positively charged protons and neutral neutrons, and electrons, which orbit the nucleus.
If an atom gains one or more electrons, it becomes negatively charged and is known as an anion. If an atom loses one or more electrons, it becomes positively charged and is known as a cation.
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Green S is a compound that produces green color. The maximum absorption (λmax) of this compound is at 650 nm. Tuzki wants to determine the molar absorptivity (ε) of this green compound by generating a calibration curve. Below is the absorbance of different concentrations of Green S solutions. Plot Absorbance vs concentration, generate the trendline and determine ε of this green compound (L/(mol.cm)), assuming the length of the solution in a cuvette is 1.00 cm. (Instruction: please enter only a number below)
20 is the correct answer .
What is Absorbance ?
In physics and chemistry, "absorbance" (also known as "optical density") is a measure of how much light is absorbed by a material as it passes through it. It is expressed as a logarithmic ratio of the intensity of the incident light (I0) to the intensity of the transmitted light (I), typically using the formula A = -log(I/I0). The absorbance of a material depends on its composition and the wavelength of the incident light. Absorbance is commonly used to quantify the concentration of a substance in a solution, using a spectrophotometer or other optical instrument that can measure the amount of light absorbed by the solution at a specific wavelength. The Beer-Lambert law states that there is a linear relationship between absorbance and concentration, making it a useful tool in analytical chemistry and biochemistry.
E = A/cb
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if u coated the surface of a penny with a thin layer of a nonpolar liquid (oil) and then dropped alcohol and water onto the penny what would occur?
If you coated the surface of a penny with a thin layer of a nonpolar liquid (oil) and then dropped alcohol and water onto the penny what would occur is that the alcohol will mix with the water and spread out to form a thin layer on top of the oil.
What are non-polar substances?Any molecule without any electrical charges or partial charges is said to be a nonpolar substance. Atoms with similar levels of electronegativity make up nonpolar compounds.
Alcohol is a polar substance and water is also a polar substance.
Hence, the water and alcohol will not mix with the oil because oil is nonpolar and will not dissolve in a polar solvent like water or alcohol.
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58.94 g of a substance of molecular mass 182 is dissolved in 1000 g of water at 20°C. At this temperature the vapour pressure of water is 17.5 mmHg. Calculate the vapour pressure of this dilute solution.
The vapor pressure of the dilute solution is 17.38 mmHg at 20°C.
What is the vapor pressure of solutions?Vapor pressure is the amount of pressure that the vapors apply to the liquid solvent when they are in equilibrium and at a particular temperature.
The environment's temperature and the type of liquid have an impact on vapor pressure.
To calculate the vapor pressure of the solution, we use the formula below:
Psolution = X * P°water
where;
Psolution is the vapor pressure of the solution,X is the mole fraction of water in the solution, andP°water is the vapor pressure of pure water.To calculate X, we need to know the number of moles of water and the number of moles of solute in the solution. We can assume that the volume of the solution is 1000 mL (or 1 L), since the density of water is close to 1 g/mL at room temperature.
Number of moles of water, n₁, in the solution:
n = mass / molar mass
n = 1000 g / 18.015 g/mol
n = 55.49 mol
Number of moles of solute, n₂ in the solution:
n = 58.94 g / 182 g/mol
n = 0.324 mol
Mole fraction of water in the solution:
X = n₁ / (n₁ + n₂)
X = 55.49 mol / (55.49 mol + 0.324 mol)
X = 0.994
Now we can calculate the vapor pressure of the solution:
Psolution = X * P°_water
Psolution = 0.994 * 17.5 mmHg
Psolution = 17.38 mmHg
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Why the density of a gold coin and a gold statue are same, even though the gold statue consists of the greater quantity of gold
Answer:
Explanation: Density is an intensive property of matter. This means that the value of density is independent of the quantity of matter present. It is measured by mass per unit volume. So, even though a gold statue may contain more mass or a larger quantity of gold than a gold coin, the density of both objects will remain the same, as they will have the same mass per unit volume.
2H2O2(aq) → 2H2O(l) + O2(g)
This reaction is first order, with a half life of 1735 seconds.
What is the instantaneous rate of H2O2 decomposition, when [H2O2] = 0.25 M?
Ans is 1*10^-4, please show work
The decomposition of H2O2 (hydrogen peroxide) can be described by the following reaction:
2H2O2 (aq) → 2H2O (l) + O2 (g)
This reaction follows first-order kinetics, so its rate of reaction is given by the following equation:
Rate = k[H2O2]
Where k is the rate constant and [H2O2] is the molar concentration of H2O2. The half-life of this reaction (the time required for [H2O2] to be reduced to half its initial value) is 1735 seconds.
Given that [H2O2] = 0.25 M, we calculate the rate of reaction as follows:
Rate = k[H2O2] = 1.0 x 10^-4 s^-1 × 0.25M = 2.5 x 10^-5 s^-1
Therefore, the instantaneous rate of H2O2 decomposition, when [H2O2] = 0.25 M, is 2.5 x 10^-5 s^-1.
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Classify each of the events based on whether the solubility of the gas will increase, decrease, or stay the same.
Increased gas solubility Reduced gas solubility As a body of water's temperature rises, Oz's gas solubility remains unchanged. Air enters the blood when the diver drops 10 meters; an atm of pressure rises.
Gas molecules can more easily leave the solution phase at higher temperatures due to their higher kinetic energy. As a result, solubility declines. A measurement of the concentration of dissolved gas particles in a liquid, solubility is a function of gas pressure. A gas's solubility rises as pressure is increased, but it falls as pressure is decreased due to an increase in collision frequency. The solubility of gases rises with pressure, as one might anticipate. According to Henry's Law, a gas's solubility in a liquid is directly inversely proportionate to the gas's pressure above the surface of the solution. thus this will most effectively release the pressure that has been imposed.
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What is the process of breaking down a compound into its individual elements called
Answer:Decompositiin
Explanation:
Answer:
decomposition
Explanation:
Decomposition is a chemical reaction where a compound breaks down into two or more simpler compounds or elements. The reverse process of decomposition is called synthesis or combination. In this process, two or more simple substances react to form a more complex compound. Decomposition reactions can be either spontaneous or induced by heat, light, or other forms of energy. Decomposition reactions are often used in industrial processes to extract metal from ore or to produce fertilizers and other products.
ALLEN
If the radio waves transmitted by a radio station have a frequency of 93.5 MHz, what is the wavelength of the waves, in meters?
The wavelength of radio waves with a frequency of 93.5 MHz is equal to 3.2 meters
What is wavelength?Wavelength is a measure of the distance between two consecutive points in a wave. It is determined by the speed of the wave and its frequency, which is the number of waves that pass a point in a given period of time. Wavelength is usually measured in meters, and is sometimes expressed as the number of waves that pass a point in one second. Wavelengths can range from fractions of a nanometer to many kilometers.
The wavelength of radio waves is calculated using the following formula: wavelength (λ) = velocity (c) / frequency (f).
The velocity of radio waves in air is approximately 300,000,000 m/s.
Therefore, the wavelength of radio waves with a frequency of 93.5 MHz is equal to:
λ = 300,000,000 / 93,500,000 = 3.2 meters
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Which of the below choices represents the ranking with which molecules cross a synthetic membrane composed of phospholipids but not proteins? (Ranking in order from least easily to most easily)
a. hydrophobic molecules, small polar molecules, large polar molecules, ions
b. hydrophobic molecules, ions, small polar molecules, large polar molecules
c. ions, large polar molecules, small polar molecules, hydrophobic molecules
d. small polar molecules, large polar molecules, ions, hydrophobic molecules
A synthetic membrane made of phospholipids but lacking proteins permits the passage of hydrophobic molecules, small polar molecules, large polar molecules, and ions.
Transport is the term used to describe the movement of molecules within a cell from one location to another. Hydrophobic molecules, such as oxygen, are the first to cross a synthetic membrane made of phospholipids rather than protein, followed by small polar molecules like water, large polar molecules like glucose, and then ions, which may be sodium ions. Ions are the last to cross a membrane. If the hydrophobic molecules are small enough, they can easily flow through the plasma membrane because the inside of the membrane also despises water.
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Based on the data, which
unknown element is the most
reactive?
A (ion)
B (ion)
C (ion)
D (ion)
Element A Element B Element C Element D
Color
Color
change
change
X
Color
change
X
X
X
Color
change
Color
change
X
X.
X
X
Color
change
X
X
Enter
Elements A and B is the most reactive
How can you tell if an element is reactive?
An atom's reactivity is based on the number of electrons in its outermost shell. Noble gases have limited reactivity because their electron shells are completely filled. Because they easily acquire an electron to complete their outermost shell, halogens are highly reactive.
The capacity of an element to ionize (gain or lose electrons) or share electrons is known as reactivity. Elements with greater reactivity typically gain or lose electrons. Shared electrons are typical for less reactive elements. Therefore, electronegativity and/or electron affinity are two ways that we can generally think of reactivity.
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how many particles are in 0.431 moles of PF5
Taking into account the definition of Avogadro's Number, 2.5959×10²³ particles of PF₅ are present in 0.431 moles of PF₅.
Definition of Avogadro's NumberAvogadro's number is the number of constituent particles (usually atoms or molecules) found in one mole amount of substance. Therefore, it is the proportional factor that relates the molar mass of a substance to the mass of a sample.
Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.
Number of particles in this caseYou can apply the following rule of three: if 1 mole of PF₅ contains 6.023×10²³ particles, 0.431 mole of the compound contains how many particles?
amount of particles= (0.431 moles × 6.023×10²³ particles)÷ 1 mole
amount of particles= 2.5959×10²³ particles
Finally, 2.5959×10²³ particles of PF₅ are present.
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Metallic bond and intermolecular force
Which element reacts most rapidly with water at 25 °C to
produce a gas?
Answer:
Lithium
Explanation:
The element that reacts most rapidly with water at 25°C to produce a gas is Lithium . Lithium reacts with water to produce hydrogen gas and lithium hydroxide.
Answer:
Sodium NA and NAOH sodium hydroxide
Explanation:
11
Lab Assignment 6 = 13%
Complete the following table
ATOM/ION
120Sn
25Mg²+
#PROTONS
I
# ELECTRONS
For Sn;
Protons = 50, Electrons = 50
For Mg^2+
Protons 12, Electrons = 10
How do you determine the number of protons or electrons?
The number of protons in an atom is called the atomic number and determines the chemical identity of the element. Each element has a unique atomic number, which is equal to the number of protons in the nucleus of one of its atoms.
To determine the number of protons in an atom, you can look up the atomic number of the element in the periodic table. The periodic table is a chart that organizes elements based on their atomic number and other properties. The atomic number is listed for each element and indicates the number of protons in its nucleus.
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A supersaturated solution can be prepared by dissolving solute in solvent while adding____. A supersaturated more servent solution contains more _____than can ordinarily be dissolved in the solvent detergent at room temperarte. A solution may remain supersaturated until_____is initiated, often by adding solid to the solution or by allowing solvent to evaporate.
By dissolving the solute in the solvent while adding heat, a supersaturated solution can be created. At room temperature, a supersaturated solution contains more solute.
than can normally be dissolved in the solvent. This is accomplished by dissolving the solute in a hot solvent and then progressively chilling the solution to allow the excess solute to stay dissolved, resulting in a supersaturated solution. A solution can stay supersaturated until a seed crystal is begun, which is usually accomplished by adding solid to the solution or allowing the solvent to evaporate. The seed crystal acts as a surface for surplus solute to crystallize and exit solution. The surplus solute quickly crystallizes out of solution once a seed crystal is introduced, resulting in a saturated solution.
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2Hg + O2 ----> 2HgO
If you had 6 mol of oxygen and 12 mol of mercury, what would be the limiting reactant (if any)? Show your work.
According to the stoichiometry of the chemical reaction, the limiting reactant is oxygen which is important for reaction to proceed.
What is stoichiometry?Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.It is important while balancing chemical equations and chemical calculations used for making solutions or dilutions.
The limiting reagent is oxygen as it is present in less amount and will limit the formation of product that is mercuric oxide.Once it is used up, the reaction will not proceed.
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Forming glycogen, which is a polymer, from glucose monomers is an example of
A. oxidation
B. anabolism
C. catabolism
D. an acid-base reaction
E. an enzyme reaction
Forming glycogen, which is a polymer, from glucose monomers is an example of anabolism
What is anabolism?Anabolism is a metabolic process that involves building larger molecules from smaller ones, typically using energy from metabolic pathways. This process is the opposite of catabolism, which is the breakdown of larger molecules into smaller ones.
Anabolic reactions play a crucial role in the growth and maintenance of cells and tissues, as well as in the storage of energy in the form of glycogen, fat, and other compounds.
Anabolic processes are responsible for the synthesis of proteins, nucleic acids, and other complex molecules that make up cells and tissues, and they also play a role in the regulation of various physiological processes, such as growth and development, energy metabolism, and immune function.
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Two perfumes are released at the same time. If one is standing 7.5 m from the point of release. Perfume A (molar mass 275 g/mol) and perfume B (molar mass 205 g/mol) at the same temperature. Which perfume will the person smell first? (show your working)
Answer:
perfume B
Explanation:
To determine which perfume a person will smell first, we need to determine the rate at which each perfume will travel to the person. The rate of a gas is proportional to the square root of its molar mass and the difference in partial pressures between the gas and the surroundings.
Since both perfumes are at the same temperature, the difference in partial pressures between the two perfumes will be the same. As a result, the perfume with the smaller molar mass (perfume B) will travel faster to the person and be smelled first.
In science class, savannah measures the temperature of a liquid to be celsius. Her teacher wants her to convert the temperature to degrees fahrenheit. What is the temperature of savannah's liquid to the nearest degree fahrenheit?.
The temperature of savannah's liquid to the nearest degree Fahrenheit is 93.1
Temperature conversion formulas are defined as the conversion formulas for changing the value of temperature from one unit to another. They're colorful distinct temperature conversion styles. Kelvin, Celsius, and Fahrenheit are the most generally used scales for temperature dimension.
In science class, Savannah measures the temperature of a liquid to be 34° Celsius. Her teacher wants her to convert the temperature to degrees Fahrenheit.
The general formula to convert Celsius into Fahrenheit is
[tex]F = (C*\frac{9}{5}) +32[/tex]
Substitute C=34°,
[tex]F = (C*\frac{9}{5}) +32\\\\F = (34*\frac{9}{5}) +32\\\\F = (34*\ 1.8}) +32\\\\F = 61.2 +32\\\\F = 93.1[/tex]
Therefore, The temperature of Savannah's liquid to the nearest degree Fahrenheit is 93.1°.
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Practice Problem 13.27b Predict the products that are expected when the following compound is heated with concentrated HBr. Modify the given drawing of the starting material to draw only the organic products. O- CH3 Edit
The given starting material is not visible, but if it has an -OH functional group attached to a methyl group (-OCH3), then the reaction with concentrated HBr will lead to the following products:
The -OH group will be replaced by a Br atom, forming methyl bromide (CH3Br).
Water (H2O) will also be produced as a byproduct of the reaction.
So, the organic products of the reaction are:
O-CH3 + HBr → CH3Br + H2O
In organic chemistry, a methyl group is an alkyl produced from methane that has the chemical formula CH3, one carbon atom bound to three hydrogen atoms. The group's name is frequently shortened to Me in formulas. In numerous organic molecules, this hydrocarbon group can be found. In most compounds, the group is extremely stable.
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Analysis of a compound indicates that it contains 1. 04 g k, 0. 70 g cr, and 0. 86 g o. Find its empirical formula.
the empirical formula of the compound that contains 1. 04 g k, 0. 70 g cr, and 0. 86 g o. is K0.5Cr1O2.
The empirical formula of a compound is the simplest whole-number ratio of atoms of each element in the compound. To find the empirical formula of a compound, you need to determine the number of moles of each element present in the sample.
First, you need to convert the masses of each element to moles:
For potassium (K), 1.04 g / 39.10 g/mol = 0.0264 moles
For chromium (Cr), 0.70 g / 51.99 g/mol = 0.0134 moles
For oxygen (O), 0.86 g / 16.00 g/mol = 0.0538 moles
Next, divide each number of moles by the smallest number of moles to get the simplest whole-number ratio:For potassium (K), 0.0264 moles / 0.0264 moles = 1
For chromium (Cr), 0.0134 moles / 0.0264 moles = 0.5
For oxygen (O), 0.0538 moles / 0.0264 moles = 2.0
Therefore, the empirical formula of the compound is K0.5Cr1O2. This represents the simplest whole-number ratio of atoms of each element in the compound.
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What is chemical reactivity series?
The reactivity series is a list of metals arranged in decreasing reactivity order.
Why is chemical reactivity important?The reactivity series is a list of metals ranked in decreasing reactivity, as determined by their ability to displace hydrogen gas from water and acid solutions.
The most important types of events in the universe are chemical reactions. Plants grow, produce fruit, and decompose to become compost for new plants through chemical reactions. Humans (and all other animals) reproduce, digest, grow, heal, and think as a result of chemical reactions.
Thus, The most reactive metals are at the top of the list, while the least reactive metals are at the bottom. The metal placed higher in the series can displace lower metals from their salt solution for any two metals in the series.
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Element A + compound B —> element C + compound D
————————————-
What is the reaction type?
Single replacement
Decomposition
Combustion
Synthesis
Double Replacement
Answer:
Single replacement
Explanation:
Answer:
single replacement reaction
Explanation:
This type of reaction, one element is swapped with another element in a compound, leading to the formation of two new compounds. The element A replaces one of the elements in compound B to form element C and compound D.
In a single replacement reaction, the reactants are typically elements in their elemental form and a compound. The element that is replaced is typically one that is more reactive, meaning it has a greater tendency to react and form a new compound. The new compound that is formed is typically more stable, meaning it has a lower tendency to react and form another new compound.
ALLEN
In the first 13. 0 s of the reaction, 0. 018 mol of o2 is produced in a reaction vessel with a volume of 0. 380 l. What is the average rate of the reaction during this time interval?.
Answer:
the answer is 5
Explanation:becuase it is great for the society
At 500 oC cyclopropane (C3H6) rearranges to propene (CH3CHCH2) as shown by C3H6(g) → CH3CHCH2(g). The reaction is first-order with a half-life of 17 minutes. How long will it take for the concentration of C3H6 to drop to 12.5% of its initial value at 500 oC?
The compound with half life of 17 minute have the rate constant of 0.040 minutes⁻¹ will take to reach to 12.5% of the initial amount .
What is half life ?Half life of a sample is the time required to consume half of its initial amount in a reaction.
For a first order reaction,
the rate constant k = 1/t ln W0/Wt
where t is the time of consumption, W0 be the initial amount and Wt be the amount after time t.
The half life of the compound = 17 minutes
rate constant = k = 0.693/17 = 0.040 minutes⁻¹
The time taken to reach the concentration of 12.5 % of its original amount is calculated as follows:
t = 1/k ln Wo/(Wt )
= ln( 100/12.5)/ 0.040 minutes⁻¹
= 52.49 minutes
Therefore, taken to reach the concentration 12.5% of the initial amount is 52.49 minutes.
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Convert 0.672ft to millimeters. This is the chart given
Answer: 204.8256 millimeters
Explanation:
The width of a human hair is 125 μm. What is this length in inches if 1.000 m = 39.37 inches?
The length in inches would be 4.921 x [tex]10^{-3[/tex] inches.
Dimensional analysisWe want to convert the with of human hair from 125 μm to inches.
Recall that:
1 μm = [tex]10^{-6[/tex] m
Thus:
125 μm = 125 x [tex]10^{-6[/tex] m
Also:
1 m = 39.37 inches
Thus:
125 x [tex]10^{-6[/tex] m = 39.37 x 125 x [tex]10^{-6[/tex] m
= 4921.25 x [tex]10^{-6[/tex] inches
= 4.921 x [tex]10^{-3[/tex] inches
In other words, 125 μm is equivalent to 4.921 x [tex]10^{-3[/tex] inches.
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A 2.6−mL volume of seawater contains about 4.0 × 10−10 g of gold. The total volume of ocean water is about 1.5 × 1021 L. Calculate the total worth of all the gold in the world's oceans if the price of gold is $18.23 per gram.
The total volume of sea water is 1.5 × 10²¹ L. The amount of gold in the whole volume is 6 × 10¹¹ g of gold. Then, if one gram rate $18.23, the total worth of gold is $ 1.09×10¹³.
What is gold ?Gold is a metal widely used in ornaments and other plating as well. It is excavating from the places where its minerals or ore can be found in abundant and it worth higher prize.
Given that, 2.6 ml or 0.0026 L of ocean water contains 4 × 10⁻¹⁰ g of gold. Then, 1.5 × 10²¹ g contains,
1.5 × 10²¹ ×4 × 10⁻¹⁰ /0.0026= 6× 10¹¹ g of gold.
Price of one gram of gold = $18.23
then, price of the total amount 6× 10¹¹ g = 6× 10¹¹ g×$18.23 = $ 1.09×10¹³.
Therefore, the total price of gold in the world's ocean is $ 1.09×10¹³.
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