Answer:
Covalent bonding between oxygen and hydrogen within water molecules.
when the chemical equation for a system in equilibrium is written, what symbol is used to separate the reactants from the products?
The formulae for the reactants—the chemicals that are mixed together—are written on the left, with the symbol "+" used when more than one component is present, and the formula(s) for the product(s) are written on the right. An arrow with the symbol '--->' separates the reactants and the products. And when the chemical equation for a system in equilibrium is written then double half arrow is used.
A + B ⇌ C + D
Two half-arrowheads, one pointing in each direction. Equations that depict reversible reactions utilize it:
The reaction that moves to the right is the forward one.
The left-leaning response is the one that is backward.
The quantities of the reactants and products in the reaction mixture may
be altered by changing the reaction conditions.
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you have been asked to develop a 2m solution of naoh that will be used in an acid-base neutralization reaction for emergency spill response. if you need to have 1 l of the solution available, how much naoh will you need to dissolve in water to achieve this concentration?
To make a 2M solution of NaOH, you will need to dissolve 2 moles of NaOH in every liter of water.
What is dissolve?Dissolve is a process in which a solid substance is broken down into smaller particles and mixed with a liquid so that it becomes evenly distributed. This process can be used to mix ingredients, create a solution, or even to form a new substance. Dissolving occurs when the molecules of a solid substance become attracted to the molecules of a liquid. The combination of the two materials results in the liquid taking on the properties of the solid.
Since you need 1L of the solution, you will need to dissolve 2 moles of NaOH in that liter of water.
This means that you will need to add 40g of NaOH (2 moles x 20 g/mol) to 1 liter of water to achieve a 2M solution.
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A gold-colored ring has a mass of 18.9 grams and a volume of 1.12 mL. Is the ring pure gold? (The density of pure gold is 19.3 g/mL.)
Answer:
No. The density of the gold-colored ring is 16.9 g/mL, which is less than that of pure gold, whose density is 19.3 g/mL. Therefore, the ring is not pure gold.
Explanation:
Density is an intrinsic property of a substance, which means that it is a characteristic of the substance that is independent of the size or amount of the sample. This makes density a useful property for identifying a substance, such as gold, as it can be determined for any size or amount of the sample.
In this question, by comparing the density of the ring to the known density of pure gold, we can determine whether the ring is pure gold. If the ring had the same density as pure gold, we would conclude that it is pure gold.
The density of a substance can be calculated by dividing its mass by its volume, both of which are provided:
Density = mass / volume
The density of the ring = 18.9 g / 1.12 mL = 16.9 g/mL
The known density of pure gold is 19.3 g/mL. Since the density of the ring is less than the density of pure gold, the ring is not pure gold.
would you expect mno4-(aq) to react with nai in acidic or in basic solution?
A basic solution would cause MnO4-(aq) and NaI to react. NaI and MnO4-(aq) will not combine in an acidic solution.
An acidic solution is what?An acidic solution is one that has more positively charged hydrogen ions (H) than negatively charged hydroxide ions (OH). Acids come in many forms, two of which are vinegar as well as lemon juice. An acid has fewer OH electrons than a base. Common examples are baking powder and household ammonia.
What are the top three acidic solution types?That honor goes to fluoroantimonic chemical, a superacid mixture of hydrogen chloride containing antimony pentafluoride. Lemon zest, acidity, 0.1 M HCl, and any amount of an acid in water are examples of acidic solutions.
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the mass of 10 ml of a liquid is 10.112 g. what is the density if the liquid is water? 1.011 g/ml when 1.000 g of sucrose is added to the liquid, what is the density if the liquid is a sucrose solution? 1.112 g/ml which density is a physical property? [ select ] if 0.143 g of sucrose is added to the sucrose solution, does the solution's density change?
Density is a measure of how dense the mass of a substance or object is. Density describes how much space an object or substance takes up (its volume) about the amount of matter in that object or substance (it's mass).
In mathematics and physics, a type of mass is calculated as a mass which is defined as mass divided by volume (Density = Volume Mass).
The values provided in a question:
volume = 10 ml
mass = 10.112 g
Density formula:
ρ = m/v.
ρ = 10.122/10
ρ = = 1.0112 g/ml
So, the density of the liquid in sucrose is 1.0112 g/ml.
When 1.000 g of sucrose is added to the liquid.
ρ = m/v.
ρ = 1000g/10ml
ρ = 100 g/ml
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if each water molecule donates one electron, what mass of water lost an electron to the lightning? one mole of water has a mass of 18 g.
(-25C / 1) 1 electron divided by 1.60x 1019 C results in 1.6 x 1020 electrons. Water has a mass of 18 g per mole. (1 / (1.6 x 1020 electrons) 1 molecular to 1 electron (6.02 x 1023 molecules/one mole) 4.8 x 103 g = (18g/mole)
An electron is who or what it is:It is possible for an electron, a negatively charged subatomic particle, to be either free or bonded to an atom (not bound). An electron is attached to an atom and is one of the three major types of particles in an atom.
What are the functions of atoms and electrons?A positively charged atom's structural constituents are called electrons. An atom's total negative charge of its electrons equals the positive charge of its protons in the atomic nucleus.
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Which of these statements is an example of an intensive property?
O Diamond is the hardest known substance.
O There are six crackers per pack.
O The mass of a piece of charcoal is 10g
O The volume of the water is 40mL.
Answer:
both c and d
Explanation:
An extensive property is a property that changes when the size of the sample changes. Examples are mass, volume, length, and total charge.
Why was the actual acceleration of mass a you calculated in question 2d less than the expected acceleration calculated in question 2a?
While acceleration generally decreases as mass increases, it tends to increase as force increases.Therefore, the greater force acting on more massive objects is counteracted by the enhanced inverse effect of mass.
What relationship do you suppose exists between the two masses and the rate that the heavier object descends?It is obvious from the expression above that the acceleration will be higher with a larger difference in masses.Therefore, the heavier object will move faster if the difference in mass between the two objects is higher.
Why does having less mass make acceleration easier?Mass times acceleration equals force.Therefore, the force needed to move anything will be less the smaller the mass.Additionally, less force is needed the slower your move the object.
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If we react 10 moles of hydrogen with 6 moles of oxygen. what is the limiting reagent and how much water is produced?
The limiting reagent in this reaction is hydrogen because it is the reactant that is used up first.
The balanced equation for the reaction between hydrogen and oxygen to form water is:
2H2 + O2 -> 2H2O
To react 10 moles of hydrogen with 6 moles of oxygen, we will also need 6 moles of oxygen.
Since we have enough hydrogen and oxygen to react completely, we can calculate the number of moles of water produced.
10 moles of H2 will react to produce 10 moles of H2O and 6 moles of O2 will react to produce 3 moles of H2O. Therefore, the total amount of water produced is 10 + 3 = 13 moles of water.
Choose the proper whole-number coeffi-
cients for each substance to yield a balanced
equation.
d
1. 2, 1, 2
2.1, 1, 1
3. 1, 2, 1
4. 2, 1,1
The correct whole-number coefficients for each substance are required to produce a balanced equation. 2, 1, 2 (option 1). (option 1).
A balanced equation is what?When mass is preserved and the number of atoms of each element on either side of the equation is equal, the chemical equation is said to be balanced.
Give an example of the balance equation.Think of the response, for instance: 2Mg(s) + O2 (g) 2MgO (g) On both sides of the reactant and product in this reaction are two atoms each of magnesium and oxygen. Determining that the reaction mechanism is a balanced equation equation, it follows the law of conservation of mass.
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Rank the following ions in order of increasing basicity. Be sure to answer all parts.
CH3CH2^-
CH3NH^-
CH3O^-
In order of increasing basicity, CH3O^- < CH3NH^- < CH3CH2^-
What distinguishes basicness from basicness?HSO has a basicity of 2, as it may produce two H+ ions. If a molecule can give an OH- ion, receive an H+ ion, or give a lone pair of electrons in solution, it is considered to have basic character. Base examples include NaOH, NH3, etc. Basicity and basic character are very separate concepts.
What factors determine basicity?The position of the nitrogen atom's electron pair, the degree to which it has been hybridized, and the viability of resonance stabilization all affect how basic heterocyclic amines are. The electron pair in pyrrole is a component of the aromatic system. Pyrrole is hence a fairly weak base.
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what is the result of a closed-loop control system with a fluoride analyzer incorrectly indicating low fluoride levels?
The fluoride metering system uses online detection of the fluoride concentration to monitor fluoride metering systems in waterworks.
Describe the fluoride meter.With an electrode sensor, the Extech FL700 Fluoride Meter can read total fluoride ions in water samples straight from 9.99 ppm or mg/L down to 0.1 ppm with automated temperature compensation (10 degrees C of calibration temperature) in less than a minute.
How does a selective fluoride ion electrode function?An inner reference electrode and a membrane serve as the interface between the ion-selective electrode (ISE) and the sample solution in most cases. Depending on the variation in an individual ion's activity on each side of the membrane, a potential forms across it
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Determine the equivalent resultant couple moment about point O.
Enter the x, y, and z components of the moment separated by commas using three significant figures.
The equivalent resultant couple moment about point O is -1300i+525j +1375k.
Net force definition.The total of all the forces acting on an object is known as the net force. Mass can be propelled forward by net force. A body is subject to some other force whether it is at rest or in motion. When there are numerous forces acting on a system, the net force is used.
F1 = -300k
F2 = -300 k
F3= 200j +450j -350k
r1 = 2j
r2 = 1.5 i +3.5j
r3 = 1.5i +2j
Net force F = F1+F2+ F3 = -200i + 650j -650k
Equivalent resultant force calculation using vector sum.
Step 2/2
Equivalent moment M = r₁ x F₁ + 2 x F₂ + r3 x F3
M = [(2j))x (-300 k) + (1.5 i +3.5j)x(200j) +(.5i +2j) x( -200i +450j-350k)]
M= (-600i) +(300k) +(-700i +525 j+ 1075k)
M = -1300i +525j +1375 k
Net force F = -200i + 650 j-650 k
Equivalent moment M
M = -1300i +525 j +1375 k
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predict the organic product formed when bzcl reacts with cyclohexanol. bzcl = benzoyl chloride.
The organic product formed when benzoyl chloride reacts with cyclohexanol is Isopropyl cyclohexyl benzoat
The reaction between benzoyl chloride and cyclohexanol is esterification reaction. Benzoyl chloride on reaction with alcohols give corresponding ester. In this case the ester formed is as follow,
First, benzoyl chloride protonate then cyclohexanol attacks positively charged carbon at the alpha position via a nucleophilic reaction. Alcohol oxygen is produced via a proton transfer from an acid oxygen attack's free electron. The discharge of a water molecule A H⁺ is released and the double bond between the acid alpha carbon and oxygen is restored. An Cyclohexyl benzoat is produced.
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What is the IUPAC name for the following compound? O 1-sec-Butyl-4-isopropyl-2-methylcyclohexane O 1-Isopropyl-3-methyl-4-sec-butylcyclohexane O 4-lsopropyl-2-methyl-1-sec-butylcyclohexane O 1-sec-Butyl-3-isopropyl-2-methylcyclohexane
the IUPAC name for the following compound:
1.trans-1-isopropyl-2-methyl-cyclohexane
2.Methylcyclohexane
3. 1alpha-Isopropyl-4beta-tert-butylcyclohexane
4. 1alpha-Isopropyl-4beta-tert-butylcyclohexane
What is IUPAC nomenclature?The foundation for IUPAC nomenclature is the longest chain of carbons joined by a single bond, whether in a continuous chain or a ring. All deviations, whether multiple bonds or atoms other than carbon and hydrogen, are identified using prefixes or suffixes based on a specific set of priorities. Names are given to chemical elements based on their origins, physical or chemical properties, or fictional characters. The IUPAC then approves the recommended name for an element (International Union of Pure and Applied Chemistry).
Here,
the IUPAC designation for the subsequent compound:
1.trans-1-isopropyl-2-methyl-cyclohexane
2.Methylcyclohexane
3. 1,1-diisopropyl-4,4-dimethylcyclohexane
4. 1-amino-1-propyl-4-tert-butylcyclohexane
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3. calculate the molarity of a solution that is prepared by dissolving 2.24 grams of naoh in enough deionized water to make 500.0 ml of solution? the molar mass of naoh is 40.0 g. molarity
The molarity is 0.112 M. if that is prepared by dissolving 2.24 grams of naoh in enough deionized water to make 500.0 ml of solution .
What is molarity and its SI unit?Molarity is mathematically defined as Molarity = Number of moles of solute Volume of solution in litre. As the number of moles solute is measured in mol and the volume of solution will be in litre . So, the unit of molarity is mol L - 1 .
Is 1M molarity?Molarity also known as molar concentration and is represented by “M”. For example, solution of 1M of sodium chloride dissolved in water has a molarity of 1M. A number of moles of solute can be calculated by dividing mass by the molecular weight of the solute.
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is it possible for two different compounds to be made from the exact same two elements CK12-Foundation
Answer:
Yes, they are called isomers. “Each of two or more compounds with the same formula but a different arrangement of atoms in the molecule and different properties.”
Explanation:
hope this helps
calculate the concentration (% m/v) of nacl solution that was made by dissolving 12.7 g of sodium chloride in enough water to make 2.3 l of solution.
The concentration (% m/v) of NaCl solution that was made by dissolving 12.7 g of sodium chloride in enough water to make 2.3 l of solution is 0.55%.
Concentration, often represented by the symbol "C," refers to the amount of a specific substance (solute) present in a given amount of another substance (solvent). There are different ways to express concentration, including molarity, molality, and mass percentage (%, w/v, or % m/v).
% m/v (mass percentage by volume) is a way to express the concentration of a solution in terms of the mass of solute (in grams) present in a given volume of solvent (in mL). It is calculated by multiplying the mass of the solute by 100 and then dividing that result by the volume of the solution. The unit for % m/v is % (percentage).
It is calculated by the following formula:
% m/v = (mass of solute / volume of solution) x 100
In our case, the mass of the solute is 12.7 g while the volume of the solution is 2.3 l or 2300mL.
% m/v = (mass of solute / volume of solution) x 100
% m/v = (12.7 / 2300) x 100
% m/v = 0.55%
Hence, the concentration expressed as (% m/v) is 0.55%.
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For the following electrochemical cell Co(s)|Co2+ (aq, 0.0155 M)||Ag+ (aq, 1.50 M)|Ag(s)
write the net cell equation. Phases are optional. Do not include the concentrations.
The net cell equation for the electrochemical cell Co(s)|Co2+ (aq)||Ag+ (aq)|Ag(s) is: Co(s) + 2Ag+(aq) → Co2+(aq) + 2Ag(s)
The electrochemical cell of Cobalt (Co) consists of two electrodes, one of Cobalt (Co) and the other of Silver (Ag).
The net cell equation for this cell is Co(s) + 2Ag+(aq) → Co2+(aq) + 2Ag(s), indicating that when two moles of Silver ions (Ag+) are combined with one mole of Cobalt (Co), two moles of Cobalt ions (Co2+) and two moles of Silver (Ag) are produced.
This cell reaction is an example of redox (oxidation-reduction) reaction, in which there is a transfer of electrons between the two electrodes.
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how many ml of 95% w/w sulfuric acid having a specific gravity of 1.820 should be used in preparing 2 liters of 10% w/v acid?
The concentration of the sulfuric acid (95% w/w) and its specific gravity, we need to calculate the mass of sulfuric acid required to make 2 liters of 10% w/v acid.
What is sulfuric acid?Sulfuric acid (H2SO4) is a strong mineral acid, which is commonly used in a variety of industrial and chemical applications. It is a colorless, dense, oily liquid that has a highly corrosive nature and a strong sour odor. Sulfuric acid is composed of sulfur, hydrogen, and oxygen and is highly reactive, forming strong bonds with other compounds. It is a strong oxidizing agent, and its reaction with water produces heat and hydrogen gas. It can react with both organic and inorganic compounds and is commonly used to manufacture fertilizers, dyes, oils, and detergents. Sulfuric acid is also used in the processing of many metals, including copper, lead, and zinc.
The mass of sulfuric acid required = (2 liters * 10g/100ml * 1.820 g/ml) = 36.4 g
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5 H2O2 (aq) + 2 MnO4 - (aq) + 6 H+ (aq) → 2 Mn 2+ (aq) + 8 H2O (l) + 5 O2 (g) . In a titration experiment, H2O2 (aq) reacts with aqueous MnO4 - (aq) as represented by the equation above. The dark purple KMnO4 solution is added from a buret to a colorless, acidified solution of H2O2 (aq) in an Erlenmeyer flask. (Note: Ath the end point of the titration, the solution is a pale pink color.)
In the titration you described, the unknown solution is an acidified hydrogen peroxide (H2O2) and the known solution is a dark purple solution of potassium permanganate (KMnO4). The reaction between these two solutions is represented by the balanced equation you provided:
5 H2O2 (aq) + 2 MnO4 - (aq) + 6 H+ (aq) → 2 Mn 2+ (aq) + 8 H2O (l) + 5 O2 (g)
Titration is an experimental technique used to determine the concentration of a solution of an unknown concentration by slowly adding a solution of a known reactant concentration until a specific reaction endpoint is reached.
The endpoint is typically indicated by a change in color, pH, or the formation of a precipitate, among other things.
When the endpoint of the titration is reached, the solution is a pale pink color, indicating that the reaction between the H2O2 and KMnO4 is complete.
From the balanced equation and stoichiometry, we know that for every five molecules of H2O2, two molecules of MnO4- are needed to neutralize it. So the number of moles of KMnO4 used in the titration is directly related to the number of moles of H2O2 present in the solution.
The concentration of H2O2 can be calculated by dividing the number of moles of H2O2 by the volume of the solution.
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12 A student carries out an experiment to find how fast 3 cm pieces of magnesium ribbon dissolve in 10 cm³ samples of sulfuric acid at different temperatures. Which piece of apparatus does the student not need? A balance B measuring cylinder с stop-clock D thermometer
Using 10 cm3 samples of sulfuric acid at various temperatures, a student conducts an experiment to determine how quickly 3 cm sections of magnesium ribbon dissolve in the solution. The pupil does not require a balance equipment.
Explain about the sulfuric acid?
With the chemical formula H2SO4, sulfuric acid is a mineral acid. The names Mattling acid and Oil of Vitriol are other names for sulfuric acid. It is highly caustic and acidic in nature. It dehydrates and oxidize when present in higher amounts.
Sulfuric acid (H2SO4), often known as oil of vitriol in the past, is an inorganic chemical that is highly corrosive and powerful. It is a viscous liquid that smells ethereal and pungent and ranges in color from colorless to slightly yellow. It is soluble in water at all concentrations.
Sulfuric acid is a concentrated acid that is very reactive and dissolves most metals. It also oxidises, dehydrates, or sulfonates the majority of organic molecules and frequently results in charring. Alcohol and water react aggressively with sulfuric acid to release heat.
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which of the subshells i) 2 d ii) 3 f iii) 5 g iv) 6 i cannot exist in an atom? select all that apply
Out of all the given subshells it is 2d shell which doesn't have real existence as an atom.
(i) If d-subshell l=2, the values of sof l in the second shell (jn=2) are 0 and 1. Consequently, the third shell cannot contain any d-subshell. As a result, we can conclude that the second subshell does not actually exist as atom.
(ii) In the third shell (n=3), the values of l are 0, 1, and 2 in the case of the f-subshell, where l=3. There is no actual existence of 3f-subhsell because there cannot be any f-subshell in this shell.
(iii) In the fourth shell (n=4), where l=4, the values of l are 0, 1, 2, and 3. There is no actual 4g subshell because there cannot be any g sub shell in this shell.
(iv) The fifth shell (n=5) has l values of 0, 1, 2, 3, and 4, which proves that the d-sub shell is actually present
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8) explain two ways that an energetically unfavorable reaction can be driven by an energetically favorable one.
One way an energetically unfavorable reaction can be driven by an energetically favorable one is through the use of a coupled reaction.
What is energetically favourable reaction?An energetically unfavorable reaction is a chemical reaction that requires an input of energy to occur, meaning that the reaction will not take place spontaneously. An example of an energetically unfavorable reaction is the breaking of a covalent bond, which requires an input of energy to break the bond and thus is not spontaneous.
In a coupled reaction, two reactions, one energetically favorable and one energetically unfavorable, are linked together. The energetically favorable reaction provides the energy required to drive the energetically unfavorable reaction. An example of this would be the reaction of glucose to pyruvate, which is energetically unfavorable. However, if it is coupled with the oxidation of NADH to NAD+, which is energetically favorable, then the reaction can be made energetically favorable.
Another way an energetically unfavorable reaction can be driven by an energetically favorable one is through the use of a catalyst. Catalysts are chemicals that lower the activation energy required for a reaction to occur, allowing it to occur faster and at a lower temperature. Catalysts can also drive energetically unfavorable reactions by providing a lower energy pathway for the reaction to occur. An example of this would be the reaction of hydrogen peroxide to oxygen and water. Hydrogen peroxide is an energetically unfavorable reaction, but when it is catalyzed by the enzyme catalase, it becomes energetically favorable.
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how many grams of methanol are produced when 7.0 grams of carbon monoxide reacts with 2.5 grams of hydrogen gas?
≈ 0.008 mol CH3OH
Hence the correct answer is 0.008 mol.
The statement of mass (grams) of methanol is "0.008 g."
What is mass?
A substance is something to do with mass that takes up space. The mass of a compound is the total amount of atoms present in grams that make up a molecule. The grams is the unit of mass.
The balanced equation comes out to be,
CO(g) + 2H2(g) → CH3OH(l)
In order to calculate the mass of methanol, initially the moles of the substance to be calculated from the given mass of CO and H2.
Gram to mole conversion,
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3.122 if a container were to have 10 moleucles of o2 and 10 molecules of nh3 how many total molecules p would bbe present in the ocntainer after this reaction goes to completion
64 molecules will be present in the container after the reaction is completed.
What is meant by reactant and product?The reaction of compounds and molecules occurs in the presence of the reactants and produces products through various means.
The reaction is : 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g)
We can see that 5 molecules of oxygen are present for 4 molecules of ammonia.
If the container had initially, 10 molecules of oxygen and 52 molecules of ammonia then,
As 4 molecules of NH3 reacts with 5 molecules of O2
52 molecules of NH3 reacts with X molecules of O2
we get, X= 52 *5/4
So, 65 molecules of O2
From this, it can be said that the oxygen is the limiting reagent;
And 5 molecules of O2 reacts with 4 molecules of NH3
10 molecules O2 reacts with X molecules of NH3
X for Ammonia:
X = 4* 10/5
So, 8 molecules of NH3
As, 5 molecules of O2 = 4 molecules of NO
and 10 molecules of O2 = X molecules of NO
X for nitric oxide:
X = 4* 10/5
So, 8 molecules of NO
As, 5 molecules of = 6 molecules of
and 10 molecules of = X molecules of
X for water
X = 4* 10/5
So, 8 molecules of H2O
Total molecules will be:
44 molecules of NH3 + 8molecules of + 12 molecules of H2O = 64 molecules
Hence 64 molecules are produced.
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A reaction occur more quickly when powdered iron i ued intead of a ingle piece of iron of the ame ma becaue the powdered iron
Repone
act a a better catalyt than the ingle piece of iron
act a a better catalyt than the ingle piece of iron
ha a greater urface area than the ingle piece of iron
ha a greater urface area than the ingle piece of iron
aborb le energy than the ingle piece of iron
aborb le energy than the ingle piece of iron
i more metallic than the ingle piece of iron
Breaking bonds in the reagents, rearranging those atoms into new groups (the products), and creating new bonds in the products are all components of a chemical reaction.
What is a reaction in science?In a chemical reaction, one or more chemicals, usually known as reactants, change into one or more other compounds, frequently referred to as products. Chemical parts or chemical elements make up substances. A response is a behavior, propensity, or course of action that is different from what was first intended. Decisions are taken in the heat of the moment without much thought or consideration of the potential repercussions. Reaction: Making a declaration in response to another person's action or remark.
What are examples of reactions and what causes chemical reactions?Changes in color, temperature, gas production, or precipitant formation are common outcomes of chemical reactions. Combustion, digestion, and cooking are a few straightforward instances of daily reactions.
Atoms create and break chemical bonds during chemical reactions. Reactants are the molecules that initiate a chemical reaction,
Therefore, a collision between reactant particles must not only take place, but it must also have enough energy to break the all reactant bonds necessary for the formation of the products.Different reactions require different amounts of collision energy. The activation energy, also known as Ea, is the quantity of energy that reactant particles require in order to break the previous bonds and cause a reaction to take place.Looking at an energy diagram, like the one in the figure, is another method to consider this. If particles are to respond, they must be able to overcome the activation energy, or "bump." The reactant particles will rebound (bounce off of one other) if the energy of the collision is less than the activation energy, and no reaction will take place.To know more about Reaction visit:
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Which of the following solvents would be good to use for 'H NMR analyses?
a. Acetone
b. dimethyl sulfoxide
c. chloroform-d
d. acetone-d6
e. deuterium oxide
The solvents that can be utilised for proton NMR analysis are deuterium oxide, chloroform-d, and acetone-d6. This is due to the deuteration of all the aforementioned solvents.
What is meant by deuteration?
Deuteration refers to the action of adding deuterium to a molecule and chemical mixture.
What is the process of deuteration?
Chemical deuteration is subjecting complete molecules to fresh water (deuterium oxides) at high pressure and temperature in the presence of an acid catalyst, deuterating them, or using them as the construction blocks for the production of a desired molecule.
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what is the standard potential, in volts, of a galvanic cell made of ce4 and cu2 , given the standard reduction potentials below? (3 points) ce4
The standard potential in volts of galvanic cell would be 1.27 V.
The tendency of a chemical species to be reduced, expressed in volts under normal conditions, is known as the standard reduction potential. The standard reduction potential belongs to the group of potentials known as standard electrodes or standard cells. The difference in voltage between the cathode and anode is known as the standard cell potential. A galvanic cell or voltaic cell is an electrochemical device that transforms the chemical energy of spontaneous redox reactions into electrical energy. electrical cell A voltaic cell is an electrochemical device that produces electricity through chemical processes.
We know that
Ce[tex]_{4}[/tex]+ + e− → Ce[tex]_{3}[/tex]+ Eº = 1.61 V
Cu(s) ==> Cu[tex]^{2}[/tex]+ + 2e Eº = -0.34 V
E of cell = 1.61 + (-0.34) = 1.27 v
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How many moles are in 1.23 x 1024 atoms of Calcium (Ca)?
The amount of substance of a system which contains as many elementary entities is called as mole. 2.05 moles are in 1.23 x 1024 atoms of Calcium (Ca).
What is mole ?The term mole is defined as the amount of substance of a system which contains as many elementary entities.The mole is called as containing exactly 6.023 × 10 ²³ elementary unit.
The mole is a convenient unit to use because of the great number of atoms, molecules. It is represented by symbol "mol".
1 mole of calcium = 6.023 × 10 ²³
1 mole ⇒ 6.023 × 10 ²³
X ⇒ 1.23 x 10²⁴
X = 12.3 x 10²³ / 6.023 × 10 ²³
= 2.05 moles
Thus, 2.05 moles are in 1.23 x 1024 atoms of Calcium (Ca).
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