Sodium acetate will form the basic salt when dissolved in water.
Water turns basic when a salt made from a strong base and a weak acid dissolves in it. Sodium ions and acetate ions are created when sodium acetate dissociates in water. There are no acidic or basic characteristics in the sodium ion. The conjugate base of acetic acid, the acetate ion, has a high affinity for H+ ions.
The solution turns acidic when a salt made from a potent acid and a feeble base dissolves in water. Chloride ions and ammonium ions are created when ammonium chloride dissociates. No affinity exists between the chloride ion and H+ ions.
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What mass of hydrogen is produced when 195mg of potassium is added to water?
The mass of hydrogen that will be produced when 195 mg of potassium is added to water would be 5 mg.
Stoichiometric problemFrom the balanced equation of the reaction:
[tex]2K + H_2O --- > 2KOH + H_2[/tex]
The mole number of the potassium that reacts to the mole of the hydrogen gas that is produced is 2:1.
If 195 mg of potassium reacts:
1 mg = 0.001 g
195 mg = 195 x 0.001
= 0.195 g
Recall that: mole = mass/molar mass
Molar mass of potassium = 39 g/mol
mole of 0.195 g potassium = 0.195/39
= 0.005 mol
From the stoichiometric mole ratio, the equivalent mole of hydrogen gas produced would be:
0.005/2 = 0.0025 mol.
Molar mass of hydrogen gas = 2 g/mol
Mass of 0.0025 hydrogen gas = 0.0025 x 2
= 0.005 g
0.005 g = 0.005 x 1000
= 5 mg
This means that 0.005 g or 5 mg of hydrogen gas will be produced when 195 mg of potassium is added to water.
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what is the molarity of an ethanol (c2h6o) solution that was prepared by dissolving 50.500 g of ethanol into water to a final volume of 750.0 ml? assume the solution has a density of 1.20 g/ml.
The molarity of the ethanol is 11.29M .
What is molarity ?
Molar concentration, also known as molarity, amount concentration, or substance concentration, is a unit used to describe the amount of a substance in a solution expressed as a percentage of its volume. The number of moles per litre, denoted by the unit symbol mol/L or mol/dm3 in SI units, is the most widely used unit for molarity in chemistry. One mol/L of a solution's concentration is referred to as one molar, or 1 M.
The mass of one mole of ethanol is 46.07 g/mol.
The number of mole in 50.500 g ethanol is 50.500/46.07 = 1.096158 mole.
We know that,
Mass = Density × Volume.
The final volume of the solution 750.0ml and the density of the solution is 1.20g/ml.
The mass of the solution is 1.20g/ml × 750.0ml = 900 gm.
The mass of water is (900-50.500) = 849.5 gm.
So the term molarity is defined as:
One of the most common units of concentration, expressed in M. It is defined as no moles of solute in 1 liter of solution.
The molarity of the solution is:
(1.09615 × 1000)/ 849.5 = 1.29M (approx.).
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suppose that 60 ml of 0.1 m naoh is required to completely neutralize the amine group of glycine in an analyte solution. what quantity of glycine is present in the analyte?
The quantity of glycine present in analyte as measured by titration is 3mmol.
This titration calculation can be done using dimensional analysis. All values should first be converted to scientific notation: 60 mL NaOH is equal to 6 x 10-2 L NaOH. 1 x 10-1 mol NaOH/L NaOH is equal to 0.1 M NaOH. For every mole of glycine present in the analyte, 2 moles of NaOH have been supplied at the second equivalence point. This is due to the fact that one OH- was necessary to scavenge the COOH group, and a second OH- was required to scavenge the amine. To take this into consideration, we must adjust our computation. Finally: (6 x 10-2 L NaOH) x (10-1 mol NaOH / L NaOH) x (1 mol glycine / 2 mol NaOH) = 3 x 10-3 mol = 3.0 mmol glycine.
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An infrared wave has a wavelength of 0.00005 m. What is this wavelength in
scientific notation?
A. 5.0 x 103 m
B. 5.0 x 10-4 m
C. 5.0 x 10-6 m
D. 5.0 x 10-5 m
An infrared wave has a wavelength of 0.00005 m. this wavelength in scientific notation is 5.0 × 10⁻⁵ m.
Scientific notation is also called as standard form. Scientific notation is used to express the number that is too large number or too small is convenient written in a decimal form. scientific notation contains two part decimal number multiply power of 10.
given data is as follows :
infrared wave has wavelength = 0.000005 m
the scientific notation of the wavelength given is = 5.0 × 10⁻⁵ m
Thus, An infrared wave has a wavelength of 0.00005 m. this wavelength in scientific notation is 5.0 × 10⁻⁵.
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what is the ph of a solution made by mixing 40.00 ml of 0.100 m hcl with 25.00 ml of 0.100 m koh? assume that the volumes of the solutions are additive.
The pH of the solution which was made by mixing 40ml of 0.100 M HCL with 25.00ml of 0.100 M KOH is 1.669.
The base and the acid have the same molarity, but the acid's volume is more than the bases' volume, hence after mixing the resultant solution is acidic.
The concentration of OH⁻ solution in the mixture is
= (molarity of base * volume of base - molarity of acid * volume of acid) / total volume
= (40 mL*0.1M - 25 mL *0.1 M ) / (40 mL +25mL)/ 1000)
= 0.021428571 M
pH = -log(0.021428571) = 1.669
Hence the pH is 1.669
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Which statement correctly describes how hydrolysis causes chemical weathering? (1 point)
O Water reacts with minerals in rocks to produce carbonic acid, weakening the rock.
O Water reacts with carbon dioxide to produce clay, weakening the rock.
O Water reacts with minerals in rocks to produce clay, weakening the rock.
O Water reacts with carbon dioxide to produce carbonic acid, weakening the rock.
The term chemical weathering is said to occur when water reacts with carbon dioxide to produce carbonic acid, weakening the rock.
What is weathering?The term weathering has to do with the breaking down of the rock. Now we know that rocks are defined as the solid part of the earth's crust. We can find the rocks either at the surface or under the earth.
The process of the breakdown of the rocks can be initiated by many processes and one of the processes is by the break down of the rock by the hydrolysis of the minerals that can be found in the rock. This owes to the formation of acid in the rocks.
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explain how bones are classified by shape
Bones are classified into Five according to shape namely: Long bones, short bones, flat bones, iregular bones, sesamoid bones.
What is a bone?These are living tissues that contain their own blood vessels and are comprised of different cells, proteins, minerals, and vitamins. They make up the body's skeleton.
Bone classification according to shape:
Long bones: They are long, wide, and cylindrical in shape. They act as leveres e.g Femur, tibia, fibula, metatarsals, humerus, ulna, radius, metacarpals, and phalanges.Short bones: They are thick and cubic in shape. They give support and allow motion. eg. Carpals, tarsals.Flat bones: They appear Thin, and curved. Muscles are attached to them. They protect delicate internal organs.eg. Sternum, ribs, scapulae, and cranial bones.Irregular bones: They have complex shaped and also protect internal and delicate organs. eg. Vertebrae, facial bones.Sesamoid bones: They are small, round and are seen in tendons. They guard the tendons against the force of compression. eg. Patellae.Learn more about Bones on https://brainly.com/question/24169840
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what is the mass percent (m/m), of a solution prepared from 50.0 g nacl and 150.0 g of water? what is the mass percent (m/m), of a solution prepared from 50.0 g nacl and 150.0 g of water? 25.0% 40.0% 3.00% 0.250% 33.3%
The correct answer is 25%. Option A.
Solution:
mass of NaCl (solute) = 50 g
mass of H2O (solvent) = 150 g
Mass of solution = mass of solute + mass of solvent
= (50 + 150) g
= 200 g
Concentration of mass% (m/m) = (mass of solute / mass of solution) x 100 %
= (50/200) x 100 %
= (0.25) x 100 %
= 25.0%
Therefore answer is 25.0% (m/m)
The mass percentage is calculated by dividing the mass of one component by the total mass of the mixture and multiplying by 100%. A mole fraction is a unit of concentration defined as the number of moles of a component divided by the total number of moles in the solution. Solution mass percent is defined as the mass of solute present per 100 grams of solution.
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what do you think happens to a sound wave when the volume of sound increase
As the volume of the sound is seen to increase, the sound that we hear is louder as the amplitude of the sound increases.
What is sound?Sound is a kind of wave that moves through a medium. We know that sound has to move via several compressions and rare factions. This implies that sound is as well propagated through air. The movement of the sound waves through air is because the air is set into vibration by the sound. Thus, the air is very imprtant in the movement of the sound waves.
With this much said, we can see that if there is more air, there would more molecules that can be set into vibration and the sound wave would tend to increase and that is the deal that we are trying to communicate here.
Thus, the amplitude of air increases as the volume of the sound gets higher and the sound that we hear is much louder.
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a 50.0 ml sample of 2.50 m phosphoric acid is titrated with a 1.20 m barium hydroxide solution. determine the volume of base used to reach the equivalence point in the titration.
The required volume of base is 156.25 mL
TitrationTitration of a strong acid with a strong base is a quantitative analysis to determine the molarity of an acid or base solution. Phosphoric acid has the chemical formula H₃3PO₄ with an acid valence of 3, while Barium hydroxide has the chemical formula Ba(OH)₂ with a base valence of 2. The volume of base needed can be calculated using the following formula:
(M H₃PO₄) (V H₃PO₄) (valence) = (M Ba(OH)₂ (V Ba(OH)₂) (valence)
We have,
M H₃3PO₄ = 2.50 m
V H₃3PO₄ = 50 ml
Valence = 3
M Ba(OH)₂ = 1.2 m
V Ba(OH)₂ = ?
Valence = 2
So,
(M H₃PO₄) (V H₃PO₄) (valence) = (M Ba(OH)₂ (V Ba(OH)₂) (valence)
(2.50) (50.0) (3) = (1.20) (V Ba(OH)₂) (2)
375 = 2.40 V Ba(OH)₂
V Ba(OH)₂ = 375/2.40
= 156.25 mL
So, The required volume of base is 156.25 mL
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while determining the volume during this experiment (part ii), if the total volume of the flask were incorrectly reported as 125 ml, how would this error affect the calculated molar mass of the unknown volatile liquid? explain.
While determining the volume during this experiment .if the total volume of the flask were incorrectly reported as 125 ml, this error affect the calculated molar mass of the unknown volatile liquid. yes
The number of mole calculated by the following formula :
number of moles = mass / molar mass
greater the number of number of moles low the molar mass.
the ideal gas equation is given as :
P V = n RT
and the volume is directly proportional to moles . if the volume increases molar mass decreases.
Thus, While determining the volume during this experiment .if the total volume of the flask were incorrectly reported as 125 ml, this error affect the calculated molar mass of the unknown volatile liquid. yes
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the conversion of carbon dioxide to carbonic acid can be catalyzed by carbonic anhydrase with an activation energy of 85.6 kj mol-1at 25c. by what factor will the rate constant increase if the temperature is raised to 37c?
7.133 is the rate constant increase if the temperature is raised to 37c.
factor=rate(T2)/rate(T1) .
The proportionality constant (k) that links the pace of the reaction to the concentrations of reactants is known as the specific rate constant. For any chemical reaction, the rate law and the particular rate constant must be ascertained through experimentation. Temperature affects the rate constant's value.a chemical reaction in which two or more substances interact and change into new ones, or where one substance transforms into another.
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What chemical reaction has almost the same products and reactants as cellular respiration but reversed?.
Answer: Rusting Photosynthesis
Explanation: Hope this helps
question unless otherwise instructed, you may use the periodic table in the chemistry: problems and solutions book for this question. which element is most likely the best conductor of heat?
Silver is most likely the best conductor of heat according to the periodic table.
The most electrically conductive component is silver, taken after by copper and gold. Silver too has the most elevated warm conductivity of any component and the most noteworthy light reflectance.
The components can be classified as metals, nonmetals, or metalloids. The most electrically conductive component is silver, taken after by copper and gold. Silver too has the most elevated warm conductivity of any component and the most noteworthy light reflectance.
As to why silver is the most excellent conductor, the reply is that its electrons are more liberated to move than those of the other components.
This has got to do with its valence and gem structure. Most metals conduct power. Other components with tall electrical conductivity, are aluminum, zinc, nickel, press, and platinum. Brass and bronze are electrically conductive amalgams, instead of components.
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What are physical and chemical changes of matter?
Answer:
Physical changes are those in which the shape, size, or state of the matter changes, but the substance is still essentially the same. Chemical changes are those where one or more substances are combined to produce a new substance.
Explanation:
For example, chopping up a carrot or ice melting into water are both physical changes. Chemical changes are those where one or more substances are combined to produce a new substance. At the end of a chemical change, you have a new substance. Burning a piece of paper would be a chemical change, as would baking a cake. Ozone is an invisible gas made of 3 oxygen atoms.
how are the reactivities of tert-butyl bromide and 2-bromopropane related to the stabilities of the carbocations produced as intermediates in the reaction? you must fully justify your answer.
The reactivities of tert-butyl bromide and 2-bromopropane are related to the stabilities of the carbocations produced as intermediates in the reaction in several ways.
First, it is important to note that tert-butyl bromide has an electron-withdrawing group (carbonyl) attached to its aromatic ring. This makes it more reactive than 2-bromopropane because it is easier for tert-butyl bromide to achieve a favorable resonance structure.
Second, it is also important to note that tert-butyl bromide has a more stable carbocation intermediate than 2-bromopropane because it has a larger number of bonds between carbon atoms. This means that these bonds take longer to break apart during the transition state, which makes it harder for tert-butyl bromide's intermediate to form.
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which of the following minerals participates in antioxidant reactions? multiple choice question. phosphorus potassium calcium selenium
According to the given statement potassium minerals participates in antioxidant reactions.
What role do antioxidants play in redox reactions?Redox control of signaling pathways is important in defining the expression of genes and cells in response to peroxidation because natural antioxidants play a vital role in lowering ROS/RNS levels.
How do antioxidants inhibit oxidation?By neutralizing free radicals, complexing prooxidative ions, quenching molecular oxygen and phototherapy, and inactivating lipoxygenase, antioxidants prevent food from oxidizing. An antioxidant is a substance that has the power to prevent another molecule from oxidizing; in other words, an antioxidant is a limiting reagent stable enough to give an atom to a free radical in motion, neutralizing it.
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when an ionic compound is added to water, the will be attracted to the partially positive h atom of water and the will be attracted to the partially negative o atom of water. as the compound dissolves the ions separate from each other, a process called .
The process by which the ions are attracted to water and separate from each other when dissolved in water is called dissociation.
What is dissociation of ions in water?
The ionic salts when added to water dissolve in water by dissociation. The ions in the ionic compound break the bond between them and get dissolved in water. Water molecules reduce the electrostatic force between the ions and solvate them by surrounding them.
The positive ions of the ionic compound gets attracted to hydroxide ion of water which is negatively charged. The positive ion of the ionic compound gets attracted to protons in water which are positively charged. the ions in ionic compound dissolve by dissociation.
Therefore, due to dissociation the ionic compound dissolves in water and get attracted to opposite charges in water.
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the ground state electron configuration ofor the snigle electron in the hydrogen atom is 1s^1. what are the values of the ml and ms quantum numbers for this electron?
ml= 0 ms = +1/2 are the values of the ml and ms quantum numbers for this electron
What is quantum numbers ?
A total of four quantum numbers are used to fully describe the motion and trajectory of each electron in an atom. The combination of all quantum numbers of all electrons in an atom is described by a wave function corresponding to the Schrödinger equation. . Quantum numbers are important because they can be used to determine the electron configuration of atoms and the putative positions of atomic electrons. Quantum numbers are also used to understand other properties of atoms such as: B. Ionization energy and atomic radius.
Atoms have four quantum numbers: principal quantum number (n), orbital angular momentum quantum number (l), magnetic quantum number (ml), and electron spin quantum number (ms). The principal quantum number n is the energy of an electron and probable distance from the nucleus. In other words, it says to the size and energy level of the orbital in which the electron is placed. The number of subshells or l describes the shape of the orbitals. It can also be used to determine the number of angular nodes. The magnetic quantum number ml represents the energy level in the subshell and ms represents the electron spin. This is either upwards or downwards.
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which fossil fuel can be made to burn cleaner and reduce carbon dioxide emissions if it is combined with purified oxygen?
Fossil fuel can be made to burn cleaner and reduce carbon dioxide emissions if it is combined with purified oxygen is coal.
Coal can be made to burn cleaner and reduce the carbon dioxide it it will combine with the purified oxygen. coal is type of fossil fuel. coal is black in color or brownish black. the fossil fuel coal is made up of plant. the plant gets their energy from the sunlight so, it is clear that col is from sun. fossil fuels are non renewable source of energy.
Thus, Fossil fuel can be made to burn cleaner and reduce carbon dioxide emissions if it is combined with purified oxygen is coal.
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Use this equation for the next question.
Mg(OH)2 + NaCl ® MgCl₂ + NaOH
How many hydrogen atoms are on the reactant side?
000
1
02
4
8
There are two atoms of hydrogen on the reactant side of the equation.
What is a reaction?What we try to show on paper are the changes that substances can undergo. A reaction is said to occur when two or more substances are combined together. The combination of the substances would now lead to the rearrangement of bonds and then the formation of a new product.
We know that it is one of the rules of writing a balanced chemical reaction equation that the number of the atoms of each element on the reactant side must be the same as the number of atoms of the same element on the products side.
When we look at the reaction as shown, we can see that the reaction is balanced hence we can be able to find the number of atoms of hydrogen on the reactants side by doing an atom count.
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when aluminum (al) reacts with oxygen (o2) in a synthesis reaction, what is the chemical formula of the product? group of answer choices alo2 none of these options al2o3 al3o2
This is a synthesis reaction we're given that aluminium (Al) can react with oxygen gas (O2 to produce aluminium oxide (Al2O3).The balanced chemical equation for this reaction is 4Al(s)+3O2(g)→2Al2O3(s)
When two separate atoms or molecules interact to create a new compound or molecule, the process is known as a "synthesis reaction." The majority of the time, energy is released and an exothermic reaction takes place during a synthesis reaction. An endothermic result is also conceivable, though. When sodium (Na) and chlorine (Cl) are combined, sodium chloride is created. This is an illustration of a synthesis reaction (NaCl). Al2O3 is the chemical formula for the compound of aluminium and oxygen known as aluminium oxide. It is precisely referred to as aluminum(III) oxide and is the most prevalent of various aluminum oxides. Aluminum oxide is utilized for its strength and hardness.
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sicl4 reacts with mg to produce mgcl2 and si (see video for balancing). if 17 g of silicon are required, how many grams of mg are needed?
If 17 grams of silicon are required, then 7.2 grams of Mg are needed to react.
The balanced chemical equation of the reaction of SiCl₄ and Mg is,
SiCl₄ + 2Mg → Si + 2MgCl₂
So, as we can see from the reaction,
2 moles of Mg reacts, it forms one mole of silicon.
We know,
Moles = Mass/molar mass
we can write,
2 moles of Mg = mole of Si
2 x mass/molar mass = mass/molar mass
Molar mass of Si is 28 g/mol.
Molar mass of Mg is 24 g/mol.
The mass of Silicon required is 17 grams.
Putting the values,
2 x mass/24 = 17/28
Mass of Mg required is 7.2 grams.
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A compound is formed by combining a polyatomic cation and a polyatomic anion. If the valency of the constituent elements, present in cation is three and one, then which of the following statement(s) is/are correct?
One/More Correct Answer(s)
A.
The compound can be ammonium sulphate
B. The molecular mass of the carbonate of this polyatomic cation can be 96 u
C. The metal present in the compound can be aluminium
D. Chemical formula of the compound can be (N*H_{4}) 2 SO 4
A compound is formed by combining a polyatomic cation and a polyatomic anion. The compound can be ammonium sulphate and the chemical formula for the compound is (NH₄)₂SO₄.
The ammonium ion is a polyatomic cation - NH₄⁺ and the polyatomic anion that is sulfate ion - SO₄²⁻. The polyatomic cation and the polyatomic anion combine and for the polyatomic ionic com pounds. Ionic bond is formed between a positively charge ion and the negatively charge ion.
Thus, A compound is formed by combining a polyatomic cation and a polyatomic anion. The compound can be ammonium sulphate and the chemical formula for the compound is (NH₄)₂SO₄.
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how many coulombs are required to produce 77.0 g of lithium metal from a sample of molten lithium chloride?
1930 coulombs are required to produce 77.0 g of lithium metal from a sample of molten lithium chloride.
Weight of metal deposited = ECt / 96500, Applied charge= 1930C
Efficiency= 77%
Effective charge= 77/100 (1930)=1486.1C
96500C liberate 1 mole.
1447.5C liberates 1486.1 / 96500 moles = 0.0154 moles .
What is Molten lithium chloride ?LiCl-Li, a molten mixture of metallic lithium and lithium chloride, are crucial to the electrolytic reduction of a variety of metal oxides. Researchers have been studying these mixes' distinctive high temperature physical and chemical characteristics for decades.
Lithium metal is primarily made from lithium chloride by electrolyzing a LiCl/KCl melt at 450 °C (842 °F). LiCl is additionally employed in automotive parts as an aluminum brazing flux. As a desiccant, it dries out air streams.
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calculate the ph of an aqueous solution that contains 0.293 m sodium sulfite and 0.236 m sodium hydrogen sulfite.
The pH of an aqueous solution is -0.7459
Let the total volume of the solution where both the mixture of aqueous solution of sodium sulfide and sodium hydrogen sulfite are present be V
no. of moles of H+ coming from Na2S,H20 = 18 * 0.293 * V
no. of moles of H+ coming from NaHS = 0.236 * V
Final concentration of H+ will be
Cf = (18 * 0.293 * V) + (0,23 * V) / V
Cf = 5.57
pH = - log [5.57]
pH = - 0.7459
Negative pH occurs when the molarity of hydrogen ions in a strong acid is greater than 1N (normality)
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what kind of compound would 5A and 7A make
In periodic table group 5A consist of nitrogen, phosphorus, arsenic and the group 7A consist of all the halogens.
What is periodic table ?The periodic table is a table form of chemical elements arranged according to atomic number, starting with hydrogen and ends to oganesson, which has the highest atomic number.
Because they are arranged in table form of the elements, it is known as the periodic table. They're present in rows and columns. Periods and Groups are the names given to the horizontal rows that comes from left to right and the vertical columns that comes from top to bottom.
Thus, Group 5A contain nitrogen, phosphorus , arsenic compounds while in group 7A contain all the halogens.
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Force, Motion, and Newton's Laws (8.6 A and C):Question 4
A force of 200 N is exerted on an object of mass 40 kg.
What is the acceleration?
Select one:
05 m/s²
05 N
05 m/s
05 m
When a force of 200 N is exerted on an object of mass 40kg, the acceleration is 05 m/s².
We know that, F = ma ... (i)
where F ⇒ Force
m ⇒ mass
a ⇒ acceleration
Given,
F = 200 N = 200 kg ms⁻²
m = 40 kg
By putting the values of F and m from the above question into equation (i), we get:
200 kg ms⁻² = 40 kg × a
a = 200 kg ms⁻² / 40kg
a = 5 ms⁻² or 5 m/s²
Hence, when a force of 200 N is exerted on an object of mass 40kg, the acceleration is 05 m/s².
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How does knowing the properties of a substance enable you to identify a substance?
Every substance might have its own unique properties. They can be of characteristic physical and chemical properties by which they can be identified.
What is physical properties?Physical properties of a substance include the properties related to its mass, volume, density its phase change etc. Various physical properties include density, conductivity, melting point, boiling point etc.
Chemical properties of a substance include its reactivity, bond type etc. The reactivity of each substance may vary based on their bond type and intermolecular force of attraction. Each substance shows different reactivity towards air, water, with other metals and chemicals.
Similarly, the state of each substance it mostly exists will be different. Therefore, by determining the physical and chemical properties of the substance, we can identify the substance.
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How much energy, in joules per mole (J/mol), does a photon in the microwave region of the EM spectrum, contain?
The photons have been calculated to contain about 4.97 * 10^-47 J/mol of energy.
What is the energy?We know that a photon is a unit of light. Better put, we can see the photon as a bundle of light and we are able to obtain the energy of that bundle of light as we can see.
Given that;
E = hf
E = energy of the photon
h = Plank's constant
f = frequency of the photon
Then
E = 6.6 * 10^-34 Js * 4.53 x 10^10 s-1
E = 2.99 * 10^-23 J
A mole would have to contain about 6.02 * 10^23 molecules so;
Energy per mole = 2.99 * 10^-23/6.02 * 10^23
= 4.97 * 10^-47 J/mol
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Missing parts;
How much energy, in joules per mole (J/mol), does a photon in the microwave region of the EM
spectrum, contain? Assume the microwave has a frequency of 4.53 x 1010 s-1. Your answer should
have 3 significant figures.
