Sodium can combine with element "X" so that the chemical formula is Na₂X. element "X" be Sulphur and compound is Na₂S - sodium sulfide.
Ionic bond involves the attraction in positive charge , cation and negative charged anion . The charge of amount of atoms balance to become a neutral compound. Sodium is a metal and have tendency to donate electron and become Na⁺ and Sulphur is a non metal and have tendency to accept electron and form S²⁻. The both combine and for a ionic compound. the 2 negative charge of sulfur atom may be neutralize by 2 Na⁺ atom.
2Na⁺ + S²⁻ ------> Na₂S
Thus, Sodium can combine with element "X" so that the chemical formula is Na₂X. element "X" be Sulphur and compound is Na₂S - sodium sulfide.
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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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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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What chemical reaction has almost the same products and reactants as cellular respiration but reversed?.
Answer: Rusting Photosynthesis
Explanation: Hope this helps
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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Discuss energy use in animals. In your discussion, be sure to :
- Identify the type of protein molecules used to digest food
- Identify the organelle where energy from nutrients is released
- State one inference that can be made concerning a cell that has many of these organelles.
The type of protein molecules that is been used to digest food in the organism are:
chymotrypsin trypsin .The organelle where energy from nutrients is released is the Mitochondria.
One inference that can be made concerning a cell that has many of these organelles is that te utilization of the energy is balanced.
What is the organelle where energy from nutrients is released?The organelle where energy from nutrients is released is the Mitochondria , this organelles can be described as the one that look tiny inside cells and this is very essential in the cell because it helps in the p[roces of releasing energy from food.
It should be noted that this process is been refferd to as process of cellular respiration and this is the reason why the biologist do referred to mitochondria as the powerhouses of the cell because it involves the use of energy.
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TRUE OR FALSE equilibrium constant (Keq) is the ratio of the mathematical concentration products over reactants.
Answer: True
Explanation: The value of the equilibrium constant indicates whether or not a reaction is favorable. Reactions for which Keq is greater than one are favorable, meaning that the reactants are higher in energy than the products and signifying that energy is released as the reaction proceeds.
why do primary alkyl halides typically undergo sn2 substitution reactions more rapidly than do secondary or tertiary alkyl halides
The SN2 reaction proceeds most quickly for primary carbons and there's less steric congestion for all of this backside assault.
Secondary as well as tertiary alkyl halides undergo the SN2 reaction more slowly than primary alkyl halides. Since there were only three little hydrogen atoms present, methyl halides interact in SN2 reactions the fastest among the simple alkyl halides.
Due to the fact that tertiary carbocations comprise three alkyl groups and secondary carbocations only have two, the former is more stable. Based on the inductive effect, tertiary carbocation is therefore more stable that secondary carbocation.
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explain what is happening at a molecular level during the dutch-process. b. rank the molecules from least likely to be present after the dutch process to most likely to be present after the dutch process. c. using the information above and your knowledge of acid-base chemistry provide an explanation for your rankings that addresses how you used structure to solve this problem. do not just quote pka values.
a) the Dutch process at the molecular level Pyrol and benzyl alcohol do not react with NaOH.
b) The molecules are ranked from those that are least likely to be present after the Dutch process to those that are most likely to be present after the Dutch procedure Pyrrol is more likely to be present than butyric acid, which has a lower likelihood of being there.
c) Butyric acid's carboxylic acid is removed using NaOH.
The acidic chemicals with a bitter taste are washed in the Dutch procedure using a strong base like NaOH. Basic substances are not cleansed and only very acidic substances are washed thoroughly. However, vanillin is only somewhat acidic, thiophenol is less acidic, butyric acid is acidic, benzyl alcohol is neutral, and pyrrol is basic.
a) Benzyl alcohol and pyrrol do not react with NaOH. However, butyric acid combines with it to produce sodium butyrate (CH₃CH₂CH₂COONa), vanillin creates its sodium salt ((2-OCH₃,4-CHO)C₆H₃ONa), and thiophenol creates sodium benzenethiolate (C₆H₅SNa).
b) Butyric acid is least likely to be present and pyrrol is most likely to be present. Butyric acid is followed in increasing order of presence by vanillin, thiophenol, benzyl alcohol, and pyrrole.
c). NaOH is used to wash away the carboxylic acid in butyric acid. Due to the aromatic ring, vanillin and thiophenol are acidic and combine with NaOH to generate a sodium salt that is water soluble. Because it is neutral and pyrrole is basic, neither benzyl alcohol nor pyrrole will react with NaOH.
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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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pls help and explain why
The picture shows the balancing of chemical equations. The balanced chemical equation of the reaction is:
2 Na + 2 H₂O ---> 2 NaOH + H₂What are balanced chemical equations?Balanced chemical equations are equations in which the number of moles of atoms of elements that are reacting is equal to the number of moles of atoms of the elements that are produced.
The balancing of chemical reactions follows the law of conservation of mass which states that matter cannot be created nor destroyed but can change from one form to another.
Hence, in a balanced chemical equation, the mass of the reactants is equal to the sum of the mass of the products.
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the chemical formula for beryllium oxide is . a chemist measured the amount of beryllium oxide produced during an experiment. she finds that of beryllium oxide is produced. calculate the number of moles of beryllium oxide produced. be sure your answer has the correct number of significant digits.
The number of moles of beryllium oxide BeO are 2.228 moles.
The chemical formula for beryllium oxide is given to be BeO.
The mass of the amount of beryllium oxide formed is 555.7 grams.
we are asked to find the number of moles,
The moles are given by the mass of the substance divided by the molar mass of the substance.
Mass = Mass formed/molar mass
Mass of BeO formed = 55.7 grams.
Molar mass of BeO = 25g/mol.
Putting values,
Moles of BeO = 55.7/25
Moles of BeO = 2.228 moles.
So, the number of moles of beryllium oxide formed are 2.228 moles.
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Complete question - the chemical formula for beryllium oxide is BeO. A chemist measured the amount of beryllium oxide produced during an experiment. she finds that 55.7 grams of beryllium oxide is produced. calculate the number of moles of beryllium oxide produced. be sure your answer has the correct number of significant digits.
what is the sum of all the coefficients in this reaction when properly balanced? lead (ii) nitrate hydrogen sulfide yields lead (ii) sulfide nitric acid (hno3)
The sum of the coefficients involved in the equilibrium reaction equation is 5.
the equilibrium reaction equation is A chemical reaction is said to be balanced when the number of atoms of an element on the reactant side is equal to the number of atoms on the product side. You can check this by doing an atomic count.
When trying to solve this problem, the first step that must be taken is to obtain a balanced reaction equation. Because that's the key to what we're trying to get here. Now you can see the balanced reaction equation for the reaction and then get the total.
[tex]Pb(NO3)_2 + H_2S = > 2 HNO_3 + PbS[/tex]
The sum of the coefficients of the equilibrium reaction equation is 1+1+2+1=5.
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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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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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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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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 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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Calculate the time it will take to deposit 1 mole of silver if a current of 6A is passed through a solution of silver trioxonitrate (v) (F=96500)
Help!!!
The time taken to deposits one mole of silver if a current of 6 ampere is passed through the silver trioxonitrate solution is 16083 seconds or 283 minutes.
What is electrolysis?Electrolysis is the process of converting electrical energy into chemical energy. If current is passed between two electrodes which are immerse in an electrolyte solution, the metal which is reduced will deposited at the cathode.
The weight of the deposited metal w related with its equivalent weight z, current I and time t is :
w = zIt /96500.
One mole of silver is 108 g. Its equivalent weight also be 108 g Thus the time t is calculated as follows:
108 g = 108 × 6 × t /96500
t = 96500/6
= 160835 seconds or 268 minutes.
Hence, the time taken to deposits one mole of silver in this electrolysis is 268 minutes.
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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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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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chemicals that change behavior or mood by directly affecting activity of the postsynaptic cell are referred to as t
Chemicals that change behavior or mood by directly affecting activity of the postsynaptic cell are referred to as neurotransmitter
In a chemical synapse the postsynaptic membrane is the membrane that receives a signal from the presynaptic cell and respond via depolarization or hyperpolarization and neurotransmitter play an important role in neural communication and they are chemical messengers that carry massages between nerve cell and other cell in your body and influencing everything from mood to involuntary movements and monoamine neurotransmitter such as dopamine are the most important neurotransmitter in the pathophysiology of mood disorders
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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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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 equilibrium reaction will experience a shift towards the products in equilibrium position when the concentration of ni2 is increased?
Reaction Ni²⁺(aq) + 6NH₃(aq) ⇌ [Ni(NH₃)₆]²⁺ will experience a shift towards the products in equilibrium position when the concentration of Ni²⁺ is increased.
What is equilibrium shift?According to Le Chatelier's Principle: When the equilibrium is stressed, the response changes to relieve the stress. This means that adding a reactant moves the equilibrium away from the reactant to the right. Adding a product moves the equilibrium away from the product and to the left.
Equilibrium type:
Stable equilibrium.Unstable equilibrium.Neutral equilibrium.As the concentration of Ni²⁺(aq) increases, the system attempts to reach equilibrium by reducing the increased coefficient according to Le Chatelier's principle. To do this, the concentration of Ni²⁺(aq) must be lowered. Therefore, it is necessary to lower the Ni²+(aq) concentration by promoting forward reaction.
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The given question was incomplete so the complete question is as follows:
Which equilibrium reaction will experience a shift towards the products in equilibrium position when the concentration of Ni2+ is increased? View Available Hint(s) Which equilibrium reaction will experience a shift towards the products in equilibrium position when the concentration of is increased?
Ni(OH)₂(s)⇌Ni²⁺(aq)+2OH⁻(aq)
[Ni(H2O)₆]²⁺(aq)+3En(aq)⇌[Ni(En)₃]²⁺(aq)+6NH₃(aq)
Ni²⁺(aq)+6NH₃(aq)⇌[Ni(NH₃)₆]²⁺
NiS(s)⇌Ni²⁺(aq)+S²⁻(aq)
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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Which effect of the chemical industry is a positive one? (1 point)
O acid rain
O advancements in medicine
O building manufacturing
O pollution of water
In an ecosystem, the effect of the chemical industry which is a positive one is advancements in medicine.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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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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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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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.
More on stoichiometric problems can be found here: https://brainly.com/question/28297916
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