An atom's reactivity is determined by the amount of electrons in its outermost shell.
An atom is just what?A chemical element is uniquely determined by its atoms, which are tiny pieces of matter. An atom is made up of a core core and one or perhaps more electrons with negative charges that orbit it. The positive charges, comparatively hefty atomic nuclei that make up the nucleus may be present.
What elements that constitute atoms?Quarks and protons are the two categories of fundamental components that comprise an atom. An atom's nucleus is encircled by an area of electrons. The electrical charge of the every electron is negative one. The neutrons and protons which together help compensate an atom's nucleus, are formed of quarks.
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In the arrhenius equation, the collision frequency and molecular orientation are incorporated in the value of?
The collision frequency and molecular orientation are incorporated in the value of the activation energy (Ea) in the Arrhenius equation.
The Arrhenius equation is a mathematical expression that describes the temperature dependence of reaction rates. It states that the rate constant (k) of a chemical reaction is directly proportional to the frequency of successful collisions between reacting molecules, and is given by the equation:
k = Ae^(-Ea/RT),
where A is the pre-exponential factor, Ea is the activation energy, R is the gas constant, and T is the temperature in Kelvin.
This equation predicts that as the temperature increases, the reaction rate will also increase due to the increase in collision frequency and molecular orientation, which are both incorporated in the activation energy (Ea).
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In pole beans, green pods (g) are a dominant trait, while yellow pods (g) are a recessive trait. a bean plant with a gg genotype is crossed with a second plant that has the gg genotype. if this cross produces 500 offspring, approximately how many of the offspring will have green pods? responses a 00 b 125125
c 250250 d 500
The GG genotype of one bean plant is crossed with the gg genotype of another plant. 500 offspring this hybrid will generate will also have green pods on them The dominant gene will be present in all 500 of offspring, making them all green.
What exactly are dominant and recessive traits?Even though the dominant trait only exists in one copy, it is always manifested when the linked allele is dominant. Only when both of the related alleles are recessive do recessive features manifest themselves. The related trait is much less likely to develop when one of the genes is dominant.
An easy dominant attribute is what?An inheritance pattern with simple dominance is defined as a trait with two separate qualities, where one allele dominates the other and the trait is governed by a single gene. Humans receive 2 pairs of 23 pairs of chromosomes, each from each parent, one from each parent's side of the family.
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what information do we need to determine the density of the liquid sample? (select all that apply.) composition of the liquid sample volume of the liquid sample mass of the liquid sample height of the liquid sample in the container color of the liquid sample
volume of the liquid sample, composition of the liquid sample, and The data we require to calculate the liquid sample's density is the mass of the liquid sample.
The substance's density is defined as its mass per unit of volume (volumetric mass density or specific mass). Although the Latin letter D may also be used, the symbol for density that is most usually used is (the lower case Greek letter rho). Mass divided by volume gives the density value:
[tex]{\displaystyle \rho ={\frac {m}{V}}}[/tex]
where [tex]V[/tex] is the volume, is the density, and [tex]m[/tex] is the mass. Weight per unit volume is a common general definition of density, however this is wrong technically; the actual term is specific weight.
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complete question: what information do we need to determine the density of the liquid sample? (select all that apply.)
a)composition of the liquid sample
b)volume of the liquid sample
c)mass of the liquid sample
d)height of the liquid sample in the container
e)color of the liquid sample
what is the difference between hydrogen peroxide and rubbing alcohol?
They can be killed by alcohol in 10 seconds. The antibacterial, or disinfectant, that eliminates viruses and different types of bacteria is oxygen gas.It takes longer than rubbing alcohol to destroy bacteria.
Which of the 4 forms of alcohol are they?The four different forms of alcohol are rubbing, isopropyl, denatured, and ethyl. Ethyl alcohol, commonly known as ethanol or grain alcohol, is the one that we are most familiar with and adore.
Is alcohol beneficial to the body?Although many drink in moderation, other people don't. The effects of heavy drinking might be felt physically. It can result in liver scarring (cirrhosis), a potentially lethal condition, and liver inflammation (alcoholic hepatitis). Both blood pressure and cardiac muscle damage may result from it (cardiomyopathy).
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8. explain why sometimes you would want to use a broth while other times you would prefer a solid medium.
Because solid medium promotes colony formation for the cultivation of microorganisms. whereas for the growing of discerning microorganisms and the upkeep of stock cultures, broth is appropriate.
An organism's amount of oxygen need can be seen in broth media. Anaerobes that must exist will develop at the bottom. Aerobes must-haves will increase at the top. Anaerobes that are facultative will proliferate throughout the medium, but predominantly near the top. Microaerobes won't grow at the surface; they'll grow upward. Bacteria that are aerotolerant will spread evenly throughout the soup.
Microorganisms can be grown on two different types of growths: nutrient agar and nutrient broth. The fundamental distinction between nutrient broth and nutrient agar is that the latter is a liquid media, whilst the former is a solid. To make the nutrient agar more stable, agar is added to it. It is a galactose-based polymer. Because it promotes colony formation, nutrient agar is ideal for the cultivation of microorganisms. For the growing of discerning microorganisms and the upkeep of stock cultures, nutrient broth is appropriate. In comparison to nutrient broth, which is prepared in test tubes or bottles, nutritional agar is prepared in Petri dishes.
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what is the correct reading of the volume in the pictured buret? make sure to report your reading with the appropriate significant figures. close-up of a buret with the bottom of the liquid meniscus sitting right at the fourth tick mark above the 26 ml mark. the meniscus sits on the tick mark. there are 10 tick marks between 25 and 26 ml.
The correct reading is therefore 26.4 mL.
The correct reading of the volume in the pictured buret is 26.4 mL. The meniscus of the liquid is sitting on the fourth tick mark above the 26 mL mark, and there are 10 tick marks between 25 and 26 mL, so each tick mark represents a difference of 0.1 mL.
To find the volume, we add 0.4 mL (4 x 0.1 mL) to the 26 mL mark, giving us a final reading of 26.4 mL. This reading should be reported with one significant figure, since the smallest division on the buret is 0.1 mL.
The correct reading is therefore 26.4 mL.
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When a wave slows down as it moves from deep to shallow water, it will
Answer:
Explanation:
increase in height and wavelength will decrease. This is because the wave velocity is proportional to the square root of the water depth, and as the water depth decreases, the velocity decreases, causing the wave height to increase and the wavelength to decrease.
The chemical behavior of an atom is largely determined by - the size of its nucleus. the electrons closest to the nucleus. its outermost electrons. the number of neutrons it has. the size of neutrons it has.
An atom's outer electrons play a significant role in determining its chemical behavior.
What are three electron-related facts?The negative ions known as electrons revolve around the exterior of the nucleus. For researchers, it might be challenging to observe them because of how rapidly they spin. The tiniest particle in an atom, you can put 2000 of them inside a protons, they are drawn to the electric ions of the protons.
What is an electron composed of?The strongest evidence we now have is that neutrons and protons comprise particles. These atomic particles are considered as quarks. The amazingly we have also indicates that an electron is totally empty within.
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combustion analysis of 1.200 g of an unknown compound containing carbon, hydrogen and oxygen produced 2.086 g of carbon dioxide and 1.134 g of water. what is the empirical formula of the compound?
Combustion analysis of 1.200 g of an unknown compound that is containing carbon, the hydrogen and oxygen produced 2.086 g of carbon dioxide and 1.134 g of water. The empirical formula of the compound is C₃H₈O₂.
The mass of the carbon dioxide = 2.086 g
The mass of the water = 1.134 g
The moles of the carbon dioxide = 2.086 / 44
= 0.0474 mol
The moles of the water = 1.134 / 18
= 0.0629 mol
The moles of the carbon = 0.0474
The mass of carbon = 0.0474 × 12
= 0.5688 g
The moles of hydrogen = 0.062948 × 2
= 0.1258 mol
The mass of hydrogen = 1 × 0.1258
= 0.1258
The mass of oxygen = 0.5037 g
The moles of oxygen = 0.031489
By dividing the smallest one , we get :
Moles of carbon = 3
Moles of hydrogen = 8
Moles of oxygen = 2
Thus, the empirical formula is C₃H₈O₂.
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you have a 2.0 l balloon filled with air at a temperature of 273 k. when the volume of the balloon increases to 2.4 l, what is the new temperature? responses 240 k 240 k 323 k 323 k 655 k 655 k 900 k
You have a 2.0 l balloon filled with air at a temperature of 273 k. when the volume of the balloon increases to 2.4 l. The new temperature is 323 K
We have that the temperature of air inside the balloon is mathematically given as
T= 323 K
From the question we are told
A balloon contains 2.0 L of air at 273 K.
Its volume increases to volume of 2.4 L at constant pressure.
What is the temperature of air inside the balloon?
Temperature
Generally the equation for the Temperature is mathematically given as
T= V2 * T1 / T2
Therefore
T= 2.4 * 273 / 2.0
T= 323 K
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Describe the differences between renewable and
nonrenewable energy sources, and give an example
of each.
Renewable resources or energy can naturally regenerate themselves, whereas nonrenewable resources cannot, which is how these two types of resources vary from one another. This translates to the fact that nonrenewable resources are scarce and cannot be used sustainably.
Examples of Nonrenewable energy resourcesExamples of Nonrenewable energy resources include coal, natural gas, oil, and nuclear energy.
Examples of renewable energy resourcesExamples of renewable energy resources include wind power, solar power, bioenergy and hydroelectric.
Resources that are renewable cannot be exhausted over time. Non-renewable resources eventually run out. Nonrenewable energy is not seen as sustainable or renewable over the long run since it takes a very long time to develop.
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Can aldehydes have carbon double bonds?
Answer:
The double bond between carbon and oxygen is characteristic of all aldehydes and is known as the carbonyl group.
What is the volume of 3 moles of gas at STP?
3 moles of a gas take up 73.35 L at standard temperature and pressure (STP).
Standard temperature & pressure (STP): What does it mean?The terms "standard temperature and pressure" describe as nominal air pressure & temperature above sea level (STP). Absolute zero is the temperature & the pressure (atm). Standard pressure and temperature, or STP, is not the same as normal pressure and temperature, or NTP.
At standard temperature and pressure (STP), one mole of a gas occupies a volume of 24.45 L.
As a result, at STP, Three moles of such a gas would occupy a volume of :
= 3 x 24.45 L.
= 73.35 L
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The lower the ph, the higher the hydrogen ion concentration. True or False?
The statement is true that the lower the ph, the higher the hydrogen ion concentration.
More H+ ions at a higher pH, right?The quantity of hydrogen ions (H+) in a solution is accurately measured by the pH value of the solution. Acids have high H+ concentrations, which produces low pH levels. There is almost no H+ in bases. Greater than pH 7 pH levels are present in basic liquids.
Why do pH and H+ correlate inversely?The exponential value of the reverse of hydrogen ion activity is the pH value. Ion activity is thought to be equal to hydrogen ion concentration since the concentration of hydrogen ions is generally very low. The pH is then proportional to the logarithm of the reverse of the concentration of hydrogen ions.
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provide three examples of pure risk and three examples of a speculative risk. explain why each is either pure or speculative.
One instance of a speculative risk is stock market investing. On whether the investment will result in a profit or a loss, one can only guess.
What constitutes a pure risk, exactly?
Hazards that are uncontrollable by a person and that either result in a loss or no loss with no prospect of financial gain are referred to as pure risks. Pure risk includes unplanned events like terrorist attacks or premature deaths as well as fires, floods, and other natural calamities.
Give three examples of each pure and speculative risk and explain the differences between them.
There are just two outcomes that can result from a pure risk: nothing or a loss. Three outcomes are possible for a speculative risk: (1) nothing, (2) a loss, or (3) a gain. Pure dangers include accidents and illnesses. Gambling and investing are two examples of speculative risks. Describe the distinction between pure risk and speculative risk using three instances.
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the separation of ions in the mass spectrometer is done by their . a) electrons to protons ratio b) mass to neutrons ratio c) protons to neutrons ratio d) mass to charge ratio e) none of these
The separation of ions in the mass spectrometer is done by their mass to charge ratio.
A spectrometer is defined as a scientific instrument used to separate and measure spectral components of a physical phenomenon. Spectrometer is broadly used to describe instruments that measure a continuous variable of a phenomenon where the spectral components are somehow mixed.
Nano-electrospray ionization can directly couple the outlet of a small-scale chromatography column directly into the inlet of a mass of spectrometer. The flow out from the column is passed through a needle that is around 10-15 um at its tip. Once ionized, the ions are then sorted and are separated according to mass-to-charge (m/z) ratios.
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a 5.00-wt% aqueous sulfuric acid solution ( 1 03 g/ml) flows through a 45-m long pipe with a 6.0 cm diameter at a rate of 87 l/min. what is the molarity of sulfuric acid in the solution?
The molarity of sulfuric acid in the solution is approximately 0.112 M.
To calculate the molarity, you need to first determine the amount of sulfuric acid in the solution.
The 5.00-wt% solution means that 5.00 g of sulfuric acid is present in every 100 g of solution, so in 87 L (87,000 mL) of solution,
there would be 5.00 g * 87,000 mL / 100 g = 469.5 g of sulfuric acid.
Next, divide the mass of sulfuric acid by its molecular weight (98.08 g/mol)
\to find the number of moles: 469.5 g / 98.08 g/mol = 4.79 moles.
Finally, divide the number of moles by the volume of the solution in liters to find the molarity: 4.79 moles / 87 L = 0.112 M.
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determine the molality of a solution of ethanol dissolved in methanol for which the mole fraction of ethanol is 0.181.
The molality of a solution of ethanol dissolved in methanol for which the mole fraction of ethanol is 0.181 is 2.009 mol/kg.
Molality (m) = (moles of solute) / (mass of solvent in kg) = (0.181 * total moles) / (mass of methanol in kg).
Given the mole fraction of ethanol (xE) = 0.181
Molality (m) = (xE * MWE) / (1000 * (1 - xE) * MWM)
Molality (m) = (0.181 * 46.07) / (1000 * (1 - 0.181) * 32.04
Molality (m) = 2.009 mol/kg
To calculate the molality, the mass of methanol and the total number of moles of the solution must be known. The mole fraction of ethanol can be used to find the number of moles of ethanol in the solution, which is 0.181 * total moles.
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place the iron block on top of the heater and turn on the heat
where are the energy symbols going and what does this represent
the energy symbols are ______ and this represents ______
The energy symbols of heat relating to thermal energy are Q and this represents heat.
What is thermal energy?Thermal energy is defined as a type of energy which is contained within a system which is responsible for temperature rise.Heat is a type of thermal energy.It is concerned with the first law of thermodynamics.
Thermal energy arises from friction and drag.It includes the internal energy or enthalpy of a body of matter and radiation.It is related to internal energy and heat .It arises when a substance whose molecules or atoms are vibrating faster.
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what important thing that you should always do when you come into lab should you not do before this lab?
When entering a lab, you should always wash your hands and remove any jewelry or loose clothing items to avoid contamination.
You should also make sure to avoid touching your face, eyes, and mouth while in the lab, as this can also increase the risk of contamination.
Additionally, you should also refrain from eating, drinking, or smoking in the lab as this can introduce contaminants into the work area.
When using any chemicals or equipment, make sure to read the instructions and warnings carefully to avoid any potential risks or accidents. Lastly, make sure to clean up any spills or messes immediately to avoid any contamination or hazards.
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benzene and alkyl-substituted benzenes can be hydroxylated by reaction with h2o2 in the presence of an acidic catalyst. what is the structure of the reactive electrophile?
A hydroxide free radical is the electrophile in the specific situation of the question.
What exactly are free radicals?An atom or molecule that has one or even more unpaired electron in the valency shell or outermost orbit and therefore is responsible of independent existence is referred to as a free radical. A free radical is unstable, short-lived, and extremely reactive due to its odd number of electrons.
Why is the role of free radicals in chemistry important?Indeed, radicals are key intermediaries in a variety of chemical processes. In addition to many other chemical processes, free radicals are crucial to burning, atmospheric science, polymerization, plasma science, biochemistry, and so many others.
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what does a purple color change for the acid phosphatase test, a negative microscopic exam, and two lines on the p30 test indicate?
A purple color change for the acid phosphatase test, a negative microscopic exam, and two lines on the p30 test are all results that are used to diagnose the presence of prostatic adenocarcinoma (cancer of the prostate gland).
The acid phosphatase test is used to detect the presence of the acid phosphatase enzyme, which is often elevated in prostate cancer. The negative microscopic exam is used to rule out the presence of any other underlying conditions that may be causing symptoms similar to prostate cancer. The p30 test is used to detect the presence of a protein known as prostate-specific antigen (PSA), which is often elevated in men with prostate cancer. The two lines on the p30 test indicate the presence of PSA and provide a positive result for prostate cancer.
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a 13.597 g sample of a compound that contains sulfur is analyzed by precipitating all the sulfur as baso4. if 11.095 g of baso4 are obtained in the analysis, what is the percentage of sulfur in the original compound?
12.308% of the chemical is sulfur. The compound's whole sulfur content is transformed into barium sulfate. Therefore, the mass for sulfur from barium sulfate will match the mass for sulfur in the compound.
Is sulfur harmful to people?People are not highly poisonous to sulfur. However, consuming far to much sulfur may result in diarrhea or a burning feeling. Sulfur dust inhalation might irritate the airway or make one cough. The eyes and skin may also become irritated by it.
Where can you find sulfur?Sulfur can indeed be found in sulfide ores and in nature. It is native to areas close to volcanoes and hot springs. The tenth most common element, sulfur, is found in almost all types of plant and animal life, meteorites, ocean ocean, the humankind's crust, and or the atmosphere.
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Which type of cell make up the upper and lower layers of the leaf?
The upper and lower layers of leaves are generally made up of epidermal cells.
The anatomical structure of leavesLeaves are generally made of 3 main tissues, including:
epidermal tissuesmesophyll tissuesvascular tissuesThe epidermal tissues form the outer layers of the leaves - both the upper and lower surfaces. They are made of epidermal cells, some of which form the guard cells around openings called stomata.
Mesophyll tissue or cells are found after the epidermal cells. They consist of two layers of cells - the spongy and palisade mesophylls.
The vascular tissue of leaves are found in the veins. They consist of the xylem and the phloem.
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How many moles of oxygen gas are in a balloon containing 20.0 grams of pure oxygen gas?
In 20 grams of pure oxygen gas, there 0.5356 moles of oxygen gas
To calculate the number of moles of oxygen gas in a balloon containing 20.0 grams of pure oxygen gas, you can use the Ideal Gas Law equation [1]: PV = nRT.
Here, P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature. Assuming the pressure and temperature are constant, we can solve for n:
n = PV / RT
Plugging in our values, we get:
n = (1.62 atm)(10.0 L) / (0.08206 Latm/molK)(295 K)
n = 0.5356 moles of oxygen gas
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intermolecular forces are the interactions between molecules and are generally weaker than bonds within molecules. which molecule has only dispersion forces between like molecules?
Intermolecular forces are the interactions between molecules and are generally weaker than bonds within molecules. So, the molecule with only dispersion forces between like molecules would be the one with the largest size and highest surface area.
All the molecules experience intermolecular dispersion forces, which is also known as London dispersion forces. These forces generally arise from temporary fluctuations in the distribution of electrons within a molecule, that creates a temporary dipole. When any two molecules come close to each other, their temporary dipoles interact, which creates an attractive force between the molecules.
The dispersion forces become stronger as the size of a molecule increases and as its surface area increases, as more temporary dipoles are generated.
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g a gas, initially at 3.0 atm and 9,174.9 ml, is compressed to 6.2 l. what is the new pressure of the gas?
When a gas, initially at 3.0 atm and 9,174.9 ml, is compressed to 6.2 l, the new pressure of the gas is 4.440 atm.
Boyle's law is a law of gas which states that," the pressure exerted by a gas (of a given mass, kept at a constant temperature) is inversely proportional to the volume occupied by it".
P₁V₁ = P₂V₂
P₁ = 3.0 atm
V₁ = 9,174.9 ml
P₂ = ?
V₂ = 6.2 l = 6200 mL
Substituting the values,
3.0 atm × 9,174.9 ml = P₂ × 6200 mL
⇒ P₂ = (3.0 atm × 9,174.9 ml) / 6200 mL
⇒ P₂ = 27524.7 / 6200
⇒ P₂ = 4.440 atm
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if the small amount of mns is combined with the large amount of hcl, what is the mass of the products? the mass of any excess reactants will also be included in this total.
The reaction between a small amount of MnS and a large amount of HCl will form MnCl2 and H2S. total mass of the products will be 4Xg
The balanced chemical equation for the reaction between MnS and HCl is:
2 MnS + 4 HCl -> 2 MnCl2 + H2S
Let's assume the amount of MnS used in the reaction is x g.
Using stoichiometry, the amount of HCl required can be calculated as 4x g.
The amount of MnCl2 formed will be 2x g and the amount of H2S formed will be x g.
So, the total mass of the products will be 2x + x + x = 4x g.
Note: The value of x can be determined from the experiment or given in the problem. The mass of any excess reactants will also be included in the total mass of products.
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The chemical behavior of an atom is determined by the?
The chemical behavior of an atom is determined by the distribution of electrons in the atom's electron shells.
Electron shells are energy levels surrounding an atom's nucleus, where electrons are found. The number of electron shells is determined by the atomic number of the element. Each shell has a set number of electrons that it can hold, with the first shell holding two electrons, the second holding eight, and the third and subsequent shells holding 18 electrons each. The electron shells are arranged in an organized manner, with electrons filling the lower energy levels before moving to higher energy levels. When an electron is excited, it moves to a higher energy level, creating an electron shell configuration known as an excited state.
Electrons in the outermost shell are called valence electrons, and they play a crucial role in chemical reactions. The arrangement of electrons in electron shells helps determine an element's chemical properties, including its reactivity, melting point, and boiling point. In summary, electron shells are an important aspect of atomic structure that plays a significant role in determining an element's behavior in chemical reactions.
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a solution of known concentration can be prepared is a sample of a pure solute can be accurately weighed. what is the name for this type of solution?
A solution prepared by accurately weighing a pure solute is called a "Stock Solution."
The degree to which the average value of an object's displayed weight is near to the object's actual weight is a measure of a scale's accuracy. A scale is accurate to within 0.20 lb in 200 lb, or 0.1%, if it shows that a 200 lb reference weight weighs 200.20 lb on average.
To make a stock solution, weigh out the proper amount of a pure solid or measure out the proper amount of a pure liquid, put it in the right flask, and then dilute it to the desired volume. Depending on the intended concentration unit, many methods can be used to measure the reagent.
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