2.8 x 10^9 atoms carbon atoms are there in a 2.6-carat diamond. diamonds are a form of pure carbon
Having the chemical symbol C and atomic number 6, carbon is an element with the meaning "coal" in Latin. It is nonmetallic and tetravalent, meaning that four of its atom's electrons can be used to create covalent chemical connections. The periodic table's group 14 is where it belongs. Only 0.025 percent of the crust of the Earth is made up of carbon. Crude oil, methane gas, and coal are used as fuel sources (which is used to make gasoline). All kinds of materials i.e diamond, including polymers and steel alloys, are made with it (a combination of carbon and iron)
2.8 carat C x (0.20g C/ 1 carat C) x (1 mole C/ 12.01 g C) x (6.02 x 10^23 atoms C/ 1 mole C)
= 2.8 x 10^9 atoms C
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the phase diagram for an organic compound is shown. the pressure is measured from 0 to 1 atmosphere on the y-axis and the temperature is measured from minus 200 to 200 degrees celsius on the x-axis. a curve starts at 0.2 atmospheres at minus 210 degrees, goes parallel to the x-axis until minus 65 degrees, and increases until the triple point at 0.4 atmospheres at 10 degrees. then the curve divides into two branches. the first branch goes up and slightly to the left until 1.3 atmospheres at minus 75 degrees. the second branch goes to 0.7 atmospheres at 170 degrees and then increases until 1.2 atmospheres at 220 degrees. as a result, the part of the plot, which is arranged between the y-axis, the initial curve, and the first branch, represents phase x. the part arranged between the branches represents phase y. the part arranged between the x-axis, the initial curve, and the second branch represents phase z. what is the normal boiling point of this compound?
Assuming at atmospheric pressure 1 atm the boiling temperature will be 150 degrees celcius.
Phase diagram summarizes the effect of temperature and pressure on a substance in a closed container. Every point in this diagram represents a possible combination of temperature and pressure for the system. The diagram is divided into three areas, which represent the solid, liquid, and gaseous states of the substance.
The normal boiling point of a liquid is the temperature at which the liquid and gas are in equilibrium at 1 atm pressure and the vapor pressure of the liquid is therefore equal to 1 atm.
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How many Sodium (Na) atoms are in 6NaCl?
6 Sodium (Na) atoms are in 6NaCl.
Sodium chloride, NaCl, is composed of two elements: sodium (or Na) and chlorine (or Cl). A molecule of sodium chloride, NaCl, is made up of one sodium atom and one chlorine atom. As a result, each NaCl molecule has two atoms.
\(1\ molecule\ of\ NaCl=2\ atoms\\\\6\ molecule\ of\ NaCl=12\ atoms\\\\\)
So, 6 NaCl contains 12 atoms that is 6 Cl, and 6 sodium.
Hence, the answer is 6.
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Mrs. Sprague wants to determine which type of ball has the highest bounce. she
drops a tennis ball, soccer ball, then a basketball from a height of 15 feet, and
measures and records how high each type of ball bounces back up.
What is the Independent Variable in this experiment?
A.the different types of balls being tested
B.the height of the drop
C.the height of each bounce
D.the measuring tape
PLEASE HELP
Answer:
Explanation:
It's going to be the height of the drop. That is kept as a constant. The dependent variable is how high each ball bounces.
1. Decomposition reactions can be classified into three types. Pick the correct
option.
A. O Thermal, Electrolytic and Photo
B. Size, weight and density
C. Oxygen, carbon and sodium
D. Time location and space
Answer:
Explanation:
Option A is the correct answer
how is bacteria on mars counted as life but a heartbeat on earth is not?
how does the concentration of products affect the reaction rate?
The concentration of products can affect the reaction rate by either increasing or decreasing it.
Factors affecting the reaction rate: concentration of the productsIf the concentration of products is high, the reaction rate will decrease. This is because there are more products present, which means that the reaction will proceed more slowly. On the other hand, if the concentration of products is low, the reaction rate will increase. This is because there are fewer products present, which means that the reaction will proceed more quickly.
It is important to note that the concentration of products is not the only factor that affects the reaction rate. Other factors, such as temperature, pressure, and catalysts, can also have an effect on the reaction rate.
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The ocean stores carbon from its interactions with the atmosphere, so the ocean serves as (a) _________ for the carbon cycle.
Answer:
\(\boxed{Carbon~ Sink}\)
Explanation:
Any reservoir, natural or otherwise, is called a carbon sink, that accumulates or stores some carbon.
Nowadays the 2 more important carbon sinks are vegetation and the oceans.
We can also say that atmosphere, soil, and forests are the world's largest carbon sinks.
Also, we can describe the carbon sink as anything that absorbs more carbon from the atmosphere than it releases. In contrast, a carbon source is anything that releases more carbon into the atmosphere than it absorbs, e.g. the burning of fossil fuels or volcanic eruptions.
What is the formula for this ionic crystal?
Answer:
Al₄O₅
Explanation:
The key at the bottom tells us the blue spheres are oxygen atoms and the red spheres are aluminum atoms. By counting, there are 4 aluminum atoms and 5 oxygen atoms. Therefore, the formula is Al₄O₅.
Side groups of amino acids are typically classified under which of the following?
A) polar, nonpolar
B) linear, circular
C) alpha, omega
D) long, short
E) primary, secondary
Side groups of amino acids are typically classified as A) polar or nonpolar.
Amino acids are the building blocks of proteins and are composed of an amino group (-NH2), a carboxyl group (-COOH), and a side chain that is unique to each amino acid. The side chains can be classified as either polar or nonpolar based on their chemical properties.
Polar side chains contain functional groups such as -OH or -NH2 that can participate in hydrogen bonding with water or other polar molecules. Examples of polar amino acids include serine (Ser), threonine (Thr), and asparagine (Asn).
Nonpolar side chains, on the other hand, are hydrophobic and do not interact with water or other polar molecules. These side chains are typically composed of hydrocarbons and can be further divided into aliphatic or aromatic categories. Examples of nonpolar amino acids include glycine (Gly), alanine (Ala), and phenylalanine (Phe).
In summary, side groups of amino acids are classified as polar or nonpolar based on their chemical properties.
So A is correct option.
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consider a mixture of air and gasoline vapor in a cylinder with a piston. the original volume is 40.0 cm3. if the combustion of this mixture released 950.0j of energy, to what volume will the gases expand against a constant pressure of 650.0 torr if all of the energy of combustion is converted into work to push back the piston?
The volume of the gases after combustion would be determined by the Ideal Gas Law (PV = nRT).
W = -P(ΔV) = -650.0 torr * (Vf - Vi) = -950.0 J
where Vf is considered to be the final volume and Vi to be the initial volume.
So, Vf - Vi = -950.0 J / -650.0 torr = 1.4615 cm3
Therefore, the final volume of the gases would be
Vf = Vi + ΔV = 40.0 cm3 + 1.4615 cm3 = 41.4615 cm3
What does the Ideal Gas Law states?The ideal gas law states that the product of the pressure and the volume of one gram molecule of an ideal gas is equivalent to the product of the absolute temperature of gas and the universal gas constant.
What is the difference between ideal gas and real gas?Ideal gas is a theoretical gas which obeys the Ideal Gas Law at all conditions of temperature and pressure. Those gases which exist in the environment are Real Gases. Only under the situations of high temperature and low pressure, real gases follow Ideal Gas Law. Therefore, it proves that ideal gas is not a real gas.
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Please help! this is about HALF LIVES !!!!
The sum of the kinetic energies and potential energies of all of the molecules
in a substance is called the ___ energy of the substance.
Answer:
The sum of the kinetic energies and potential energies of all of the molecules in a substance is called the thermal energy of the substance.
4Fe + 3O2 → 2Fe2O3
Iron combines with oxygen to form rust. Given the chemical reaction, how many grams of iron(Fe) would produce 10 g of rust(Fe2O3)?(molar mass of iron= 55.85; molar mass of rust= 159.69g)
A) 6.99
B) 29.9
C) 69.9
D) 9.99
6.99 grams of iron (Fe) would produce 10 g of rust (Fe2O3) when iron combines with oxygen to form rust.
How to calculate mass?The mass of a substance can be calculated as follows:
According to this question, iron combines with oxygen to form rust as follows:
4Fe + 3O2 → 2Fe2O3
First, we convert the mass of rust to moles as follows:
moles of Fe2O3 = 10g/159.69 = 0.063moles
4 moles of Fe produces 2 moles of Fe2O30.063 moles of Fe2O3 will be produced by 0.125 moles of Fe.Next, convert moles of Fe to mass as follows:
mass of Fe = 0.125 × 55.85 = 6.99g
Therefore, 6.99 grams of iron (Fe) would produce 10 g of rust (Fe2O3) when iron combines with oxygen to form rust.
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The ____ contains the highest concentration of ozone. (troposphere (exosphere ( stratosphere ( mesosphere
Answer:
the answer is stratosphere.
about 90% of ozone is found in the stratosphere.
convert 120 mm to feet
Answer:
0.393701
Explanation:
Alkali metals do not form dispositive cation, why?.
Alkali metals have only one electron in their outermost energy levels, and they can lose this one electron to form a mono positive ion only. Hence, alkali metals do not form dispositive ions.
what is the result of cell division that includes mitosis?
A. new cells with different chromosomes
B. four cells with new chromosomes
C. two identical new cells
D. one genetically different cell
Answer:
I think C is the answer
Explanation:
because Mitosis results in two identical daughter cells......
to a first approximation the ionization constant of h2s is
The ionization constant of H₂S is approximately 1.0 x 10⁻⁷.
The ionization constant, also known as the acid dissociation constant (Ka), is a measure of the extent to which an acid dissociates in water. It indicates the degree of ionization of an acid and is typically expressed as the equilibrium constant for the reaction between the acid and water.
In the case of H₂S (hydrogen sulfide), it is a weak acid that can partially dissociate in water to produce hydrogen ions (H⁺) and sulfide ions (HS⁻). The ionization reaction can be represented as follows:
H₂S ⇌ H⁺ + HS⁻
The ionization constant (Ka) represents the equilibrium expression for this reaction. The value of Ka determines the relative strength of the acid. For H₂S, the ionization constant is approximately 1.0 x 10⁻⁷, indicating that it is a weak acid.
This value indicates that H₂S only partially ionizes in water, with a small fraction of H₂S molecules dissociating into H⁺ and HS⁻ ions. The majority of H₂S remains in its molecular form.
It is important to note that the ionization constant can vary depending on factors such as temperature and concentration. The given approximation is a typical value at standard conditions.
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Acetone has a density of 0.7857 g/cm3. What would be the volume in mL of acetone if the mass was 0.3201 lbs? Remember 1 lb = 0.453 kg
A. 184.8 mL
B. 0.8982 mL
C. 251.5 mL
D. 0.1848 mL
E. 114.3 mL
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To solve this problem, we can use the given density of acetone and convert the mass from pounds to grams.
First, let's convert the mass from pounds to kilograms:
\(\displaystyle \text{Mass (kg)} = 0.3201 \times 0.453 = 0.14517 \,\text{kg}\)
Now, we can use the density formula to find the volume in cubic centimeters (cm³):
\(\displaystyle \text{Density} = \frac{{\text{Mass}}}{{\text{Volume}}}\)
Rearranging the formula to solve for volume, we have:
\(\displaystyle \text{Volume (cm}^{3}\text{)} = \frac{{\text{Mass}}}{{\text{Density}}}\)
Substituting the given values, we get:
\(\displaystyle \text{Volume (cm}^{3}\text{)} = \frac{{0.14517\,\text{kg}}}{{0.7857\,\text{g/cm}^{3}}}\)
Now, let's convert the volume from cubic centimeters to milliliters:
\(\displaystyle \text{Volume (mL)} = \text{Volume (cm}^{3}\text{)}\)
Substituting the value we obtained earlier, we have:
\(\displaystyle \text{Volume (mL)} = \frac{{0.14517\,\text{kg}}}{{0.7857\,\text{g/cm}^{3}}}\)
Calculating the value, we find:
\(\displaystyle \text{Volume (mL)} = 184.77\,\text{mL}\)
Therefore, the volume of acetone would be approximately 184.8 mL.
The correct option is A. 184.8 mL.
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♥️ \(\large{\underline{\textcolor{red}{\mathcal{SUMIT\:\:ROY\:\:(:\:\:}}}}\)
a chain-like molecule composed of repeating sub-units is known as a
A chain-like molecule composed of repeating sub-units is known as a polymer. Polymers are formed by linking smaller units called monomers together through covalent bonds.
The repeating structure of the monomers in a polymer chain gives it its characteristic properties. Polymers can have a wide range of properties depending on the composition and arrangement of the monomers. They can be flexible or rigid, transparent or opaque, and can have varying mechanical, thermal, and electrical properties.
Polymers find applications in numerous industries, including packaging, textiles, construction, automotive, and healthcare. Their versatility and customizable properties make them invaluable materials in modern society.
Overall, the chain-like structure of polymers allows for a remarkable range of properties and applications, making them an essential class of materials in various industries.
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How will the concentration of lactose be measured and what assumption must be made?
To measure the concentration of lactose, one can use methods such as the enzymatic assay or high-performance liquid chromatography (HPLC). The assumption that must be made is that other sugars or compounds present in the sample do not interfere with the measurement.
The concentration of lactose can be measured using various methods such as enzymatic assays or high-performance liquid chromatography (HPLC). However, an assumption that must be made when measuring the concentration of lactose is that there are no interfering substances present that could interfere with the accuracy of the measurement. It is also important to ensure that the sample is properly prepared and the measurements are taken under controlled conditions to ensure the accuracy of the results.
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when comparing hydrochloric acid ( hcl ) and ethyl chloride ( ch3ch2cl ), the one that is more soluble in water is
HCl is more soluble in water than ethyl chloride.
Hydrochloric acid (HCl) and ethyl chloride (CH3CH2Cl) have different levels of solubility in water. HCl is a strong acid and is very soluble in water. This means that it easily dissolves in water and can form a solution with it.
On the other hand, ethyl chloride is not as soluble in water and does not form a solution as easily as HCl does. HCl is more soluble in water than ethyl chloride.
The reason why hydrochloric acid is more soluble in water than ethyl chloride is due to its molecular structure. HCl has a single oxygen atom attached to a hydrogen atom, which makes it very polar.
The positive charge on the hydrogen atom attracts water molecules and forms strong hydrogen bonds with them.
On the other hand, ethyl chloride has two carbon atoms and three hydrogen atoms, making it a nonpolar molecule.
This means that it does not form hydrogen bonds with water molecules as easily, making it less soluble in water.
Theefore, Hydrochloric acid is more soluble in water than ethyl chloride due to its molecular structure.
HCl has a single oxygen atom attached to a hydrogen atom, making it a polar molecule that can form strong hydrogen bonds with water molecules.
Ethyl chloride, on the other hand, has two carbon atoms and three hydrogen atoms, making it a nonpolar molecule that does not form hydrogen bonds with water molecules as easily.
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Which is NOT an SI base unit?
Second
meter
degree Celsius
kilogram
Answer:
degree Celsius
question what would happen if the kinetic energy of the reactants was not enough to provide the needed activation energy? responses
If the kinetic energy of the reactants was not enough to provide the needed activation energy then:
Reaction products would reform.
The rate of the response would probably quicken.
The products would develop in an energetically unstable condition.
The complex that had been activated would change into products.
A lower energy state would be used to generate the products.
What is the meant by activation energy?
The least amount of energy necessary to bring atoms or molecules into a state where they may undergo chemical transformation or physical transport is known as the activation energy in chemistry. The difference in energy content between atoms or molecules in an activated or transition-state configuration and the same atoms and molecules in their original configuration is known as the activation energy in transition-state theory.
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Greg ran for 25 minutes at a speed of 5 km/m. Find the distance.
Here it is⬆️ Distance is 125 km
The correct number of atoms of each element present in the formula (NH4)2S is
The number of atoms corresponding to the molecule is in the lower part of the atoms, when there is no number it will mean that the atom is present only once.
So, we have that in one molecule of NH4 there will be:
\(\begin{gathered} N\rightarrow1\text{ atom of nitrogen} \\ H_4\rightarrow4\text{ atoms of hydrogen} \end{gathered}\)Outside the parentheses we see that there is a number two (NH4)2, this means that there are two molecules of NH4.
So we have:
\(\begin{gathered} (NH_4)2\rightarrow(N\times2)\rightarrow1\times2=2\text{ atoms of nitrogen} \\ \text{ }\rightarrow(H_4\times2)\rightarrow4\times2=8\text{ atoms of hydrogen} \end{gathered}\)And we have outside the molecule an atom of S
\(S\rightarrow1\text{ atom of S}\)So, we have in total:
\(2-N,8-H,1-S_{}\)The answer will be the last one, 2-N, 8-H, 1-S
How do the two desalination processes differ from the atmospheric water generator in terms of where the processes can be used?
Answer:
Water Desalination Processes. Water desalination processes separate dissolved salts and other minerals from water. Feedwater sources may include brackish, seawater, wells, surface (rivers and streams), wastewater, and industrial feed and process waters. Membrane separation requires driving forces including pressure (applied and vapor)
Explanation:
Salinized water cannot be consumed by humans, but it can be converted into freshwater, which has a variety of purposes. Desalination is the procedure, and it is being employed increasingly frequently all over the world to supply people with the freshwater they require.
What is desalination process?Desalination is the procedure used to remove the dissolved mineral salts from water. Currently, one of the most popular methods for obtaining fresh water for use in agriculture or human consumption when applied to seawater.
When seawater evaporation occurs, salt is left behind, and clouds are formed, which eventually result in rain. Da Vinci realised that it was easy to obtain using a still. Aristotle had observed that seawater would evaporate and condense into fresh water.
Seawater desalination was mostly utilised on ships and submarines over the next centuries to supply the crew with fresh water during lengthy voyages. Nevertheless, this method was not widely accessible until the industrial revolution and, more specifically, until the creation of desalination facilities.
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How can you find each of the 4 blood vessels when dissecting?
Answer:
that's a weird question
Explanation:
why do you need to know that?
A mixture of the amino acids leucine (Leu), glutamate (Glu), and arginine (Arg) is added to a cation exchange column at neutral pH. In what order will they elute from a cation exchange column
The order of elution for the given amino acids from a cation exchange column at neutral pH is: Leu, Glu, Arg.
The elution order of amino acids from a cation exchange column depends on the net charge of the amino acid at the pH of the elution buffer. At neutral pH, the carboxyl group (-COOH) of amino acids is not fully ionized, while the amino group (-NH3+) is fully ionized, resulting in a net positive charge for the amino acid.
Among the given amino acids, leucine (Leu) is a nonpolar amino acid and does not have any ionizable side chains. Therefore, it does not have any net charge at neutral pH and will not bind to the cation exchange column. It will pass through the column and elute first.
Arginine (Arg) is a basic amino acid with a positively charged guanidinium group (-NH=C(NH2)2) in its side chain. At neutral pH, the guanidinium group is fully ionized, resulting in a net positive charge. Therefore, Arg will bind to the cation exchange column through ionic interactions and will elute last.
Glutamate (Glu) is an acidic amino acid with a negatively charged carboxyl group (-COO-) in its side chain. At neutral pH, the carboxyl group is only partially ionized, resulting in a net negative charge. Therefore, Glu will have a weaker interaction with the cation exchange column compared to Arg and will elute in between Leu and Arg.
Therefore, the order of elution for the given amino acids from a cation exchange column at neutral pH is: Leu, Glu, Arg.
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the more massive an object is, the more
Answer:
it have more more mass, gravitational potential energy
Explanation: