The change in the atomic radii of the elements in period 3 from sodium to argon is similar to period 2 because the number of protons of the elements is getting bigger to the right, so the radius of the elements from left to right is decreasing.
Third Period Elemental PropertiesThe number of elemental protons to the right, the greater. The greater the number of protons, the stronger the attraction for the nucleus, so that the radius of the elements from left to right decreases. Because the attraction to the core is getting stronger to the right, the electrons are also getting stronger attracted inward, so that the valence electrons of the third period elements, the further to the right the less.
The shorter the radius, the closer the electrons are to the nucleus and the harder it is to escape. That is, the smaller the radius, the greater the ionization energy required.
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what is the gauge pressure in millimeters of mercury inside a soap bubble 0.136 m in diameter? mm hg
The gauge pressure inside a soap bubble 0.136 m in diameter is 0.00035 mmHg.
Gauge pressure is the pressure relative to atmospheric pressure. It is measured in units such as millibars, inches of mercury, or pounds per square inch (psi). Gauge pressure is the pressure above or below atmospheric pressure. A negative gauge pressure indicates a vacuum, while a positive gauge pressure indicates a pressure higher than atmospheric pressure. Gauge pressure is important in many applications, such as determining the pressure of a gas inside a closed container, measuring water pressure in a plumbing system, and measuring tire pressure in a car.
The gauge pressure inside a soap bubble 0.136 m in diameter can be calculated using the equation P = 4σ/r, where P is the gauge pressure, σ is the surface tension of the soap solution, and r is the radius of the bubble. Assuming the surface tension of the soap solution is 0.0725 N/m, the gauge pressure inside the bubble is 4σ/r = 4 * 0.0725 N/m / (0.136 m / 2) = 0.262 N/m = 0.262 * 0.00133 N/mmHg = 0.00035 mmHg. Therefore, the gauge pressure inside a soap bubble 0.136 m in diameter is 0.00035 mmHg.
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if δh for the sublimation of 1 mol of co2(s) is 26.1 kj , calculate δs in j/(k⋅mol) for this phase transition. (hint: use the temperature found in part c to calculate the answer.)
The δs for the sublimation of 1 mol of co2(s) in this phase transition is 87.9 j/(K.mol).
The heat necessary to sublimate (transform from solid to gas) one mole of a substance at a specific combination of temperature and pressure, typically standard temperature and pressure, is known as the enthalpy of sublimation or heat of sublimation in thermodynamics (STP). It is equivalent to the solid's cohesive energy. It is also equal to the typical enthalpy of production of the gaseous metal atoms for elemental metals. Typically, kJ/mol is used to express the heat of sublimation.
From the given data,
δh = 26.1 kj/mol of CO2(s)
δs = ?
for transition phase, Temperature (T) = 298.15 K
then,
δs = δh/T = 26100 j/mol /298.15 K = 87.9 j/(K.mol)
δs = 87.9 j/(K.mol)
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A solution is made up of 20 mL of water, 35 mL of isopropyl alcohol, and 8 mg of an organic solid. Which of these considered a solute?
a. Water
b. Isopropyl alcohol
c. Medication
d. Water and isopropyl alcohol e. There is no solute in this solution
It is medication. We also understand that there can be only one solvent and numerous solutes.
Water serves as both the solute and the solvent. Using your own expertise, provide an example of each sort of solution. Since both the alcohol and the water are liquid in the provided solution and the alcohol is present in a greater quantity than the water, the alcohol acts as the solvent and the water as the solute. 350 mL of isopropyl alcohol is equal to 70 x 0.05. v% = volume of solute/volume of solution/100. So, going back to our rubbing alcohol, 70 percent (vv) indicates that there are 70 milliliters of the solute, isopropanol, in every 100 milliliters of the solution.
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When is the density of water 1 g/mL How can we measure density?
The standard definition of water's density is 1 g/mL at 4 °C.
What is density?A substance's density is determined by how much mass there is per unit volume. It is known as the mass-to-volume ratio, and is commonly given in quantities of grammes per cubic centimetre (g/cm3) or kilogrammes per cubic metre (kg/m3).
How do you determine it?The standard definition of water's density is 1 g/mL at 4 °C. In other words, a millilitre of water weighs exactly one gramme at this temperature. Although temperature and pressure can cause a small variation in water's density, the value of 1 g/mL at 4°C is typically regarded as a standard reference.
There are several ways to measure density, but the most popular one uses a balance to calculate the sample's mass and a graduated cylinder or another tool to calculate its volume. The mass divided by the volume is then used to calculate the density.
A 100 mL graduated cylinder filled with 50 mL of water, for instance, would be weighed with the water inside before being empty to determine the mass of the water. The density would then be determined by dividing the water's mass by its volume (50 mL).
With a balance and graduated cylinder or an oscillating U-tube densitometer, the mass and volume of the sample must be determined in order to quantify the density of the substance.
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Which four gases were plentiful in the atmosphere/oceans of early Earth?
carbon dioxide propane
nitrogen
methane
argon
hydrogen
oxygen
When studying the early Earth, it's important to understand the gases that were present in the atmosphere and oceans. Four of the most abundant gases present in the atmosphere and oceans of early Earth are carbon dioxide, nitrogen, methane, and hydrogen.
Carbon dioxide (CO2) is an odorless, colorless gas that is composed of one carbon atom and two oxygen atoms. It is a major component of Earth’s atmosphere, and is naturally produced by animals during respiration and is also released from burning of fossil fuels. Carbon dioxide is also found in the oceans and plays an important role in the carbon cycle.
Nitrogen (N2) is an odorless, colorless gas that is composed of two nitrogen atoms. It is the most abundant gas in Earth’s atmosphere, making up about 78 percent of it. Nitrogen is found in the oceans and is a major component of proteins and nucleic acids, which are essential for life.
Methane (CH4) is an odorless, colorless gas that is composed of one carbon atom and four hydrogen atoms. It is found in Earth’s atmosphere in small concentrations, but is also released from the ocean and from burning of fossil fuels.
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How much ice (in gram) would have to melt to aborb 331 kJ of energy? The enthalpy of fuion for ice at 0 ∘C i 6. 02 kJ/mol
which of the following is not true about molecular orbital theory? the number of molecular orbitals formed is often equal to the number of atomic orbitals that combine to make them. the number of molecular orbitals formed is often equal to the n
The follows statement is not true about molecular orbitals for any substance, the number of electrons in molecular orbitals is equal to the sum of all the valence electrons on the bonding atoms. The correct answer is E.
Because the number of molecular orbitals produced is always equal to the total number of atomic orbitals combined, the claim that the amount of electrons in molecular orbitals equals the sum of all the valence electrons on bonding atoms is untrue.
When electrons are added to orbitals with the same energy, the most stable configuration is predicted by the hund's rule, and a molecule orbital can hold up to two electrons. It is true that low-energy atomic orbitals fill before high-energy atomic orbitals fill.
Your question is incomplete but most probably your full question was which of the following is not true of molecular orbitals?
a) the number of molecular orbitals formed is always equal to the number of atomic orbitals combined.
b) a molecular orbital can accommodate up to two electrons.
c) when electrons are added to orbitals of the same energy, the most stable arrangement is predicted by hund's rule.
d) low-energy molecular orbitals fill before high-energy molecular orbitals fill.
e) for any substance, the number of electrons in molecular orbitals is equal to the sum of all the valence electrons on the bonding atoms.
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N2 Check all that apply. a. dispersion forces b. dipole-dipole forces c. hydrogen bonding Submit
N2 has dispersion forces.As both of the atoms Nitrogen family N2 molecule same electronegitivity,there fore its has dispersion forces between these atoms.
N 2 (Nitrogen) is a nonpolar molecule with a linear shape in its molecular geometry. Because of this, the electronegativity and charge distribution of both atoms are identical, and the molecule as a whole has a net-zero dipole moment. Nitrogen appears as a gas with no colour or smell. Nontoxic and inflammable. although making up the majority of the atmosphere, cannot sustain life on its own. Used to pressurise aircraft tyres, purge air conditioning and refrigeration systems, and prepare food. may result in asphyxiation by air displacement. Containers may violently burst and rocket when exposed to heat or fire for an extended period of time.
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Two moles of an ideal gas are heated at constant pressure from a temperature of 30 ∘C to 100 ∘C. Calculate the work done by the gas.
Work done by given ideal gas = 1163.96 J
Work done by an ideal gas : W = -PΔV
From ideal gas equation, we know PV=nRT
Hence, PΔV = nRΔT
Hence, Work done by an ideal gas : W = -nRΔT
According to question, number of moles of given ideal gas = 2
R = gas constant = 8.314 J⋅K−1⋅mol−1
T1 = 30 ∘C = 303 K
T2 = 100 ∘C = 373K
Hence, ΔT = 373-303 = 70K
Putting these value in Work done by an ideal gas : W = -nRΔT
W = -(2)(8.314)(70) = 1163.96 J
Hence, Work done by given ideal gas = 1163.96 J
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Which describes the molecule below?
The correct statement that describes the molecule below is a lipid with three unsaturated fatty acids (B)
The fatty substances known as lipids are responsible for a wide array of physiological processes throughout the body. They are a component of the membranes that surround your cells and assist regulate the flow of material into and out of your cells. They contribute to the process of transferring and storing energy, as well as absorbing vitamins and producing hormones.
The picture shows that the molecule is unsaturated due to the presence of double bonds in each of the three fatty acids that compose the molecule. The characteristic of being double is one that is particular to unsaturated compounds.
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the estimated original concentration in a sample is 5.12 x 10^9 cfu/ml. you plan to set up a series of 1:10 dilutions and then plate 0.1 ml on your spread plate. which tube do you need to plate out to yield a countable plate?
You need to plate out tube with sample original concentration is 5.1 × 10⁹ CFU / ml to yield a countable plate.
The starting dosage is5.1 × 10⁹ × 10⁻¹ = 5.1 × 10⁸ CFU/ml
CFU levels must range from 10 to 200 per milliliter in order to produce a countable plate.
Let's make 0.1 ml into 1 ml by dilution.
As a result, the concentration is reduced to5.1 × 10⁹ × 10⁻¹ = 5.1 × 10⁸ CFU/ml
It can be lowered to 5.1 × 10¹to reduce the concentration between 10 and 200.
5.1 × 10¹ CFU/ml is the final concentration.
Initial concentration: 5.1 × 10⁹ CFU/ml
Sample volume is 5.1 × 10¹ CFU = 5.1 × 10¹ CFU × (1 ml / 5.1 × 10⁹ CFU)
= 1.0 × 10⁻⁸ ml
This is the volume must be consumed to obtain 51 CFU of countable value.
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What information should always be recorded when using a balance? The scale What should be done to the weighing container before adding any chemicals? tare the weighing paper or container What will cause the mass displayed on a digital scale to fluctuate? Select What must be done before leaving the balance area
Before using a balance, we should always check and record the scale of the balance before using it and before we add any chemical, we should always tare the weighing paper or the container we are using.
In the laboratory, the measurement of mass is performed by using balances. There are a different types of balance but most of the weighing balances that are in use now are the electronic balances.
There are a few precautions that we need to take care of while using a weighing balance. We should always check the weigh level. We should also always check and record the scale. Before we add any chemicals, we should tare the weight of the paper or the container. We should not use hot chemicals on the scale.
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Consider a 354 mL (12 oz.) can of soda that is cold enough to cause moisture from the air to condense on the outside of the can. If all of the heat released when 5 mL of vapor condenses on the can is transferred into the soda, how much would the soda temperature increase? Assume the density (1 mL/g) and specific heat (4.184 kJ/kg°C) of the soda are the same as water. Use 2,500 kJ/kg as the latent heat of vaporization.Please Help, a detailed solution would help me walk through the process for similar questions.
The temperature of the soda will increase by 12°C as a result of the heat transfer from the condensed vapor.
The amount of heat transferred to the soda can be calculated using the equation q = m x c x ΔT, where q is the heat transfer, m is the mass of the vapor, c is the specific heat of the soda, and ΔT is the temperature change of the soda.
In this case, m = 5 mL x 1 g/mL = 5 g, c = 4.184 kJ/kg°C, and q = 2500 kJ/kg (latent heat of vaporization). Substituting these values into the equation and solving for ΔT yields ΔT = (2500 kJ/kg) / (5 g x 4.184 kJ/kg°C) = 12°C. This means that the temperature of the soda will increase by 12°C as a result of the heat transfer from the condensed vapor.
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how atoms interact with each other lab activity 8
Atoms interact with each other through various chemical bonds.
Lab activity 8 might involve exploring the different ways that atoms interact with each other, specifically through the formation of chemical bonds. Chemical bonds are interactions between atoms that result in the formation of a new molecule. There are several types of chemical bonds, including covalent bonds, ionic bonds, and metallic bonds.
In a covalent bond, two or more atoms share electrons to form a strong, stable bond. For example, in a water molecule (H2O), two hydrogen atoms share electrons with an oxygen atom.
In an ionic bond, electrons are transferred from one atom to another, resulting in the formation of ions. For example, when sodium (Na) reacts with chlorine (Cl), an electron is transferred from the sodium atom to the chlorine atom, forming a sodium ion (Na+) and a chloride ion (Cl-). The ions are attracted to each other, forming an ionic bond.
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You have 10 mL of a 2 M stock solution of NaCl. What volume of NaCl stock would you have to use to make 500 µL of 100 mM NaCI? (NOTE: This is a challenging question!)Match the values to the variables.This is what I solve for 1. Ci500 μL 2. Cf10 mL 3. Vi100 mM 4. Vf2 M 5. None of these
You would need to use 2.5 µL of the 2 M NaCl stock solution to make 500 µL of 100 mM NaCl solution
To make 500 µL of 100 mM NaCl solution, you need to have 5 x 10^-7 moles of NaCl. Given the concentration of your stock solution, the number of moles of NaCl in 10 mL of the solution can be calculated as follows: you would need to use 2.5 µL of the 2 M NaCl stock solution to make 500 µL of 100 mM NaCl solution
moles of NaCl = [tex](2 M) x (10 mL) = 20 x 10^-3[/tex] moles
To obtain [tex]5 x 10^-7[/tex] moles of NaCl, you need to take [tex](5 x 10^-7 moles) / (20 x 10^-3 moles) x (10 mL) = 2.5 x 10^-6 mL = 2.5 µL[/tex] of the stock solution.
Therefore, you would need to use 2.5 µL of the 2 M NaCl stock solution to make 500 µL of 100 mM NaCl solution.
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6.The ________ gives you a measure for identifying ____ and ___. pH stands for _____ __ _____ , and the scale ranges from _____ to . A pH of ____ means extremely ________ and a pH of ___ means extremely _________.
This is science work
pH is a measure of how acidic/basic solution is. The range goes from 0 – 14, with 7 being neutral.
How is pH determined?A fluid's pH serves as a gauge for hydrogen ion concentration. Acid and base concentrations are measured using pH, which is the negative logarithm of hydrogen ion concentration expressed in moles per liter. A chemical scale called pH (pronounced "piet") is used to measure how acidic or basic an aqueous solution is. "Potential of hydrogen" (or "power of hydrogen") was the previous term used.
Although pH appears on the periodic table as an element, it is actually a unit of measurement. Potential hydrogen, or pH, tells us how much hydrogen is present in liquids and how active the hydrogen ion is.
.The pH scale gives you a measure for identifying acid and base. pH stands for potential of hydrogen , and the scale ranges from 1 to 14 . A pH of 1 means extremely acidic and a pH of 2 means extremely basic.
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please help asap! last box, i know the functional group name is amide.
The amide group has the amine moiety and the carboxylic moiety.
What is the amide functional group?An amide functional group is a molecule composed of a nitrogen atom bonded to a carbon atom, with the formula -CONH-. It is commonly found in organic compounds such as proteins and synthetic polymers.
We can now see that the chain that came form the carboxyl group is the alky chain of the amide moiety that is in the compound that have been shown in the image attached in the question that have been given above.
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Which statement correctly explains the protonation states of these histidine residues? His side chains predominantly exist in their deprotonated form, since biological pH is lower than the pK, of the His side chains. His side chains predominantly exist in their protonated form, since the pK, of the His side chains is lower than biological pH. His side chains predominantly exist in their deprotonated form, since the pK, of the His side chains is lower than biological pH. His side chains are deprotonated in the figure, but they will predominantly exist in their protonated form at biolog pH.
Since the pKa of the his side chains is lower than biological pH, this accounts for the protonation states of these histidine residues, His side chains primarily exist in their deprotonated form.
When the value of PKa is less than the value of its pH, the majority of acid molecules protonate. So they are only partially coordinated when pH is equal to PKa. So, at this point in the donation process, the harsh protonation rates are present. Additionally, the protein and its stage are represented when the PKa is higher than the pH than they are. Therefore, there is a contact between two histamine residues in the case of histamine, which can be controlled by altering the pH. Then, when the PKa.
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carbon-14 is a commonly used isotope for radiometric dating. it decays to nitrogen-14 with a half-life of 5,700 years. a biological sample is found to have 1/16 as much c-14 as there is in the atmosphere. how old is the sample?
Carbon-14 is a commonly used isotope for radiometric dating. it decays to nitrogen-14 with a half-life of 5,700 years. a biological sample is found to have 1/16 as much c-14 as there is in the atmosphere. The sample approximately 2280 years or three half lives.
The old of the sample can be calculate as followsbiological sample have 1 /16=(1/2)⁴, so
Four half lives have been experienced by a sample of wood that contains one eight of the current wood's C 14.
The approximate value of a C 14 half life is 5,700 years.
By multiplying the half life by the number of half lives, you may determine the estimated age.
5 , 700 × 4 = 2,280 years
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true or false...
electromagnetic waves can travel in empty space or space that has no particles
It is true that electromagnetic waves can travel in empty space or space that has no particles.
The correct option is True.
What are electromagnetic waves?Waves of the electromagnetic field make up electromagnetic radiation; they travel through space while carrying momentum and radiant energy. It consists of X-rays, gamma rays, microwaves, infrared, light, and radio waves.
Electromagnetic waves include radio waves, television waves, and microwaves. The only thing separating them is the wavelength. The wavelength is the distance between each wave's peak and the next.
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What is wrong with the lewis structure below? Explain how the correct structure should appear.
Answer:
way too many valence electrons
Explanation:
By putting a double bond on F, you give it 10 valence electrons which breaks the octet rule
an aqueous cscl solution is 8.00 percent by mass cscl. what is the boiling point of this solution? kb
The boiling point of this solution is 373.17 K or 100.484°C
The boiling point of aqueous cesium chloride (CsCl) solution is dependent on its concentration, but the boiling point elevation due to the solute can be calculated using the formula:
ΔT = Kb x molality.
The molality of the solution can be calculated from its mass percentage:
mass % CsCl / (molecular weight of CsCl) = molality
8.00 g CsCl / (168.39 g/mol) = 0.0474 mol/kg
ΔT = 0.51 K/m x 0.0474 m = 0.0244 K
Thus, the boiling point of the 8.00% aqueous CsCl solution would be raised by 0.0244 K above the boiling point of pure water, which is 100.00 °C.
The boiling point of the solution would be 100.00 °C + 0.0244 K = 100.0244 K or 100.484 °C = 373.17 K.
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2n2o(g) -> 2n2(g) o2(g). b. in the first 15.0 s of the reaction, 0.015 mol of o2 is produced in a reaction vessel with a volume of 0.500 l. what is the average rate of reaction during this time?
The average rate of reaction over the first 15.0 s is 0.001 mol/s.
The average rate of reaction can be calculated as the change in the amount of product (O2) divided by the time interval. In this case, the amount of O2 produced in the first 15.0 s is 0.015 mol. So, the average rate of reaction is given by:
average rate = (0.015 mol) / (15.0 s) = 0.001 mol/s.This value represents the average rate of reaction over the first 15.0 s and can be used to estimate the amount of O2 produced at a different time during the reaction. Note that this is an average rate, and the actual rate of the reaction may vary over the course of the reaction.
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predict the chemical formula for the ionic compound formed by cu²⁺ and p³⁻
The chemical formula for the ionic compound formed by Cu²⁺ and P³⁻ is Cu3P2.
In ionic compounds, positively charged ions (cations) bond with negatively charged ions (anions) to form a neutral compound. The cation and anion have a ratio of charges such that the compound as a whole is neutral. In the case of Cu²⁺ and P³⁻, the cation Cu²⁺ has a charge of +2, while the anion P³⁻ has a charge of -3. To balance out the charges, two P³⁻ ions are needed for each Cu²⁺ ion to form a neutral compound. This gives us the chemical formula for the ionic compound as Cu3P2.
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why kio4 is added for determination of manganese in steel
KIO4 is added for the determination of manganese in steel because it reacts with manganese (IV) oxide to form a highly colored complex that can be easily quantified.
KIO4 is added for the determination of manganese in steel because it reacts with manganese to form a complex that can be easily quantified. Manganese (IV) oxide is a common impurity in steel and its presence can affect the mechanical and physical properties of the steel.
In the presence of KIO4, manganese (IV) oxide is oxidized to manganese (VI) oxide. The reaction between KIO4 and manganese (IV) oxide is as follows:
2 MnO2 + 4 KIO4 + 6 H2O → 2 MnO4^- + 8 K^+ + 12 H^+
The resulting complex, MnO4^-, is highly colored and can be easily quantified using spectrophotometry. The intensity of the color is proportional to the amount of manganese (IV) oxide in the steel sample. By determining the amount of manganese in the steel, the purity of the steel can be evaluated and its suitability for different applications can be determined.
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Organize information about how synthetic materials impact society and the environment
Natural resources are used to make both natural and synthetic products.
If you go back far enough in time, you will find that all of the materials used to make a product are from our world.
What are synthetic products?Instruments used in the financial sector called synthetic products can mimic the trading of real assets or goods. They manifest themselves as commodities-based securities.
Synthetic goods cannot be consumed by the average person like food or beverages. They exist as contracts. However, they can be purchased, sold, and traded just like food and beverages.
Derivatives are the terms used to describe these contracts (bonds, stocks). The term implies that these securities frequently rely on the market for actual commodities, such as the goods produced by the agricultural industry. However, the person holding a synthetic product does not partake in, say, actual farming.
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explain the following seeming contradiction: you have two gases, a and b, in two separate containers of equal volume and at equal pressure and temperature. there- fore, you must have the same number of moles of each gas. because the two temperatures are equal, the average kinetic energies of the two samples are equal. therefore, since the energy of such a system corresponds to
You have two gases, A and B, each in its own container of equal volume, pressure, and temperature. As a result, each gas must contain the same number of moles.
Because the two temperatures are the same, the two samples' average kinetic energies are also the same.
Kinetic energy is a type of energy that a moving object or particle possesses. When an item undergoes work—the transfer of energy—by being subjected to a net force, it accelerates and acquires kinetic energy. A moving object or particle's kinetic energy, which depends on both mass and speed, is one of its properties. The type of motion could be vibration, rotation on an axis, translation (or travel along a path from one place to another), or any combination of these.
A body's translational kinetic energy, or 1/2mv2, is equal to one-half the product of its mass, m, and the square of its velocity, v. In chemistry, the moles, sometimes spelled mol, is a common scientific measurement unit for significant amounts of very small objects like atoms, molecules, or other predetermined particles. The mole represents 6.02214076 1023 units, which is a very huge number.
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If you take too much of a chemical when working, what are you supposed to do with the excess?
If we out take too much of a chemical when working, we should not put the excess chemical into the reagent bottle again.
Excess chemicals that are taken out while working should never be returned to the reagent containers. Because by doing so the entire supply might become contaminated. Instead, give your excess chemical to other students or put them in the waste containers.
When too much of chemical from the storage bottle NEVER put the excess chemical back in the bottle. This will contaminate the entire fresh stock. If spillage has occurred, cleaning up the balance is strongly recommended. Do not blow on the balance, clean the balance with a tissue or a small brush.
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what do scientists call the use of leaf shape to understand past climates?
Leaf physiognomy is what scientists call the use of leaf shapes in order to understand the past climates.
Paleoclimate or the past climate can be basically determined by using the proxy data which is basically the data which can be preserved things such as coral, ice cores, pollen, and leaves. Study of paleoclimate is very important to understand how past plants were able to react to the climate change so we that we are able to know how plants will show response to modern human-driven climate change.
Leaf physiognomy is used in the climate-models in order to reconstruct paleotemperature from the fossilized leaves. This study basically supports the idea that changes in the size of the leaves correlates with the temperature change. However, the response that are seen are varied by species and this should be particularly taken into account for the climate-models using leaf physiognomy to infer the paleoclimate.
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why is enthalpy change of displacement not directly correlated with metal reactivity series
The enthalpy change of displacement (ΔH) is the amount of heat released or absorbed when a metal reacts with an aqueous solution of an ion of another metal to form a solid compound.
The metal reactivity series, on the other hand, is a list of metals in order of decreasing reactivity, based on their tendency to lose electrons and form positive ions. While there is some correlation between the two, the enthalpy change of displacement is not directly correlated with the metal reactivity series. This is because the enthalpy change of displacement depends on several factors, such as the nature of the metal and the ion, the ionic charge, and the temperature and concentration of the solution. In general, metals that are more reactive have a greater tendency to form positive ions and release heat (exothermic reaction) during displacement reactions. However, other factors, such as the size and charge of the ion, can also play a role in determining the ΔH of a displacement reaction. So, while the metal reactivity series provides a useful guide to the relative reactivity of different metals, it is not a direct indicator of the enthalpy change of displacement for a given reaction.
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