It is observed that when magnesium reacts with hydrochloric acid, it produces visible bubbles of hydrogen gas.
A vigorous reaction will occur giving rise of heat as it is an exothermic reaction. If heat is applied then it should be more vigorous.
Reaction is as follows:
Mg(s) + HCl (aq) --> MgCl2 (aq) + H2(g)
Magnesium reacts easily with HCl to produce H2 gas and magnesium ions, Mg2+, and heat. The reaction is exothermic, so it heats up quickly.
Mg(s) + HCl (aq) --> MgCl2(aq) + H2(g)
The net ionic equation :
Mg(s) + 2H+ --> Mg2 + H2(g)
If water is removed from the solution then white crystals of Mgcl2 is obtained.
Or in simple words,
2Mg + 2HCl -> 2Mg+ + 2Cl- + H2(gas)
The magnesium is attacked by the hydrochloric acid resulting in the magnesium dissolving into the solution resulting in a solution of magnesium chloride in hydrochloric acid and the production of hydrogen gas.
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Methane (CH4), ammonia (NH3), and oxygen (O2) can react to form hydrogen cyanide (HCN) and water according to this equation:
CH4 + NH3 + O2 à HCN + H2O
You have 8 g of methane and 10 g of ammonia in excess oxygen. Answer the following questions:
· What is the balanced equation for this reaction?
· Which reagent is limiting? Explain why.
· How many grams of hydrogen cyanide will be formed? Show your work.
Answer:
-----> 2 CH₄ + 2 NH₃ + 3 O₂ -----> 2 HCN + 6 H₂O
-----> CH₄ = Whichever reactant produces the smaller amount of product is the limiting reagent. This is because the limiting reagent runs out before all of the other reactant is completely used. Because CH₄ produces the smaller amount of product, it is the limiting reagent.
-----> 13.5 grams HCN
Explanation:
Part 1:
An equation is balanced when there is an equal amount of each reactant on both sides of the reaction. These amounts can be modified by adding coefficients in front of the molecules.
The unbalanced equation:
CH₄ + NH₃ + O₂ -----> HCN + H₂O
Reactants: 1 carbon, 7 hydrogen, 1 nitrogen, 2 oxygen
Products: 1 carbon, 3 hydrogen, 1 nitrogen, 1 oxygen
The balanced equation:
2 CH₄ + 2 NH₃ + 3 O₂ -----> 2 HCN + 6 H₂O
Reactants: 2 carbon, 14 hydrogen, 2 nitrogen, 6 oxygen
Products: 2 carbon, 14 hydrogen, 2 nitrogen, 6 oxygen
Part 2:
You can determine the limiting reactant by converting each reactant mass (besides O₂) to a product mass. Whichever reactant produces the smaller amount of product is the limiting reagent. This is because the limiting reagent runs out before all of the other reactant is completely used.
Let's convert to HCN because Part 3 also wants to know how much HCN is produced. To find this amount, you need to (1) convert grams reactant to moles reactant (via their molar masses), then (2) convert moles reactant to moles HCN (via the mole-to-mole ratio from equation coefficients), and then (3) convert moles HCN to grams HCN (via its molar mass).
Molar Mass (CH₄): 12.011 g/mol + 4(1.008 g/mol)
Molar Mass (CH₄): 16.043 g/mol
Molar Mass (NH₃): 14.009 g/mol + 3(1.008 g/mol)
Molar Mass (NH₃): 17.033 g/mol
Molar Mass (HCN): 1.008 g/mol + 12.011 g/mol + 14.009 g/mol
Molar Mass (HCN): 27.028 g/mol
8 g CH₄ 1 mole 2 moles HCN 27.028 g
-------------- x ---------------- x ---------------------- x ---------------- = 13.5 g HCN
16.034 g 2 moles CH₄ 1 mole
10 g NH₃ 1 mole 2 moles HCN 27.028 g
--------------- x ---------------- x ----------------------- x ---------------- = 15.9 g HCN
17.033 g 2 moles NH₃ 1 mole
Because CH₄ produces the smaller amount of product, it is the limiting reagent. Therefore, the actual amount of HCN produced is 13.5 g.
Reaction rate is increased by an increase in kinetic energy
of the reacting particles when their
is _____________
increased
A . Collision theory
B . Surface Area
C . Temperature
D. Concentration
Answer:
Reaction rate is increased by an increase in kinetic energy
of the reacting particles when their
is _temperature_
increased
A . Collision theory
B . Surface Area
C . Temperature
D. Concentration
Please help,
How could you tell a Ca(NO3)2 solution from a Zn(NO3)2 solution?
Answer:
you better give me brainliest
Explanation:
Zinc nitrate and calcium nitrate solution can be distinguished by reaction with ammonium hydroxide. Zinc forms a white gelatinous ppt. whereas there is no precipitation of calcium hydroxide even with excess of ammonium hydroxide
Write out a balanced reaction equation for the reaction of hydronium ions (H3O+) with calcium carbonate
Balanced chemical equation for reaction of hydronium ions with calcium carbonate will be as follows:
2H3O+ (aq) + CaCO3 (s) => Ca2+ (s) + 3H2O (l) + CO2 (g)
In this balanced chemical equation, acidic aqueous solution of hydronium ion (H3O+) reacts with calcium carbonate salt (CaCO3) resulting in the formation of calcium cation (Ca2+) an alkali, that results in neutralization of excessive acid. It also forms liquid water (H2O) along with liberation of carbon dioxide gas (CO2). All acids stronger than hydrogen carbonate, provide their calcium salts dissolved in water yielding carbon dioxide, because a bare hydrogen ion has no chance of surviving in water.
To balance this chemical equation, 2 molecules of hydronium ions react with 1 molecule of calcium carbonate resulting in formation of 1 molecule of calcium cation, 3 molecules of water and 1 molecule of carbon dioxide. The reaction proceeds at room temperature.
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During an experiment, the percent yield of calcium chloride from a reaction was 82.38%. theoretically, the expected amount should have been 105 grams. what was the actual yield from this reaction? caco3 hcl → cacl2 co2 h2o 105.3 grams 101.1 grams 95.6 grams 86.5 grams
The actual theoretically yield from this reaction is 86.5 grams.
What is theoretically yield?
Theoretical yield is the quantity of a product obtained from the complete conversion of the limiting reactant in a chemical reaction. It is the amount of product resulting from a perfect (theoretical) chemical reaction, and thus not the same as the amount you'll actually get from a reaction in the lab.∵ The percentage yield = (actual yield/theoretical yield) * 100.
To calculate the theoretical yield from the balanced reaction:
CaCO₃ + 2HCl → CaCl₂ + CO₂ + H₂O,
It is clear that 1 mole of CaCO₃ reacts with 2 mole of HCl to produce 1 mole of CaCl₂, 1 mole of CO₂, and 1 mole H₂O.
to calculate the no. of moles of 95.0 g CaCO₃
n = mass/molar mass = (95.0 g)/(100.0869 g/mole) = 0.95 mol.
Using cross multiplication:
1 mole of CaCO₃ produce → 1 mole of CaCl₂, from stichiometry.
∴ 0.95 mole of CaCO₃ produce → 0.95 mole of CaCl₂.
∴ The mass of CaCl₂ (theoretical yield) = (no. of moles) * (molar mass) ⇒(0.95 mole)*(110.98 g/mole) = 105.34 g.
∵ The percentage yield = (actual yield/theoretical yield)*100.
The percentage yield = 82.15%, theoretical yield = 105.34 g.
∴ The actual yield of CaCl₂ = (The percentage yield)(theoretical yield)/100
= (82.15%)(105.34 g)/100 = 86.53 g ≅ 86.5 g.
So, the actual theoretically yield from this reaction is 86.5 grams.
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Aluminum sulfate reacts with barium iodide to produce aluminum iodide and barium sulfate
Al₂(SO₄)₃ + 3BaI₂ → 2AlI₃ + 3BaSO₄
Under appropriate conditions, nitrogen and hydrogen undergo a combination reaction to yield ammonia: N2 (g) + 3H2 (g) → 2NH3 (g) A 9.3-g sample of hydrogen requires ________ g of N2 for a complete reaction.
Answer:
43 g N₂
Explanation:
To find the mass of N₂ required, you need to (1) convert grams H₂ to moles H₂ (via molar mass), then (2) convert moles H₂ to moles N₂ (via mole-to-mole ratio from equation coefficients), and then (3) convert moles N₂ to grams N₂ (via molar mass). It is important to arrange the conversions in a way that allows for the cancellation of units. The final answer should have 2 sig figs to match the amount of sig figs of the given value.
Molar Mass (H₂): 2(1.008 g/mol)
Molar Mass (H₂): 2.016 g/mol
Molar Mass (N₂): 2(14.009 g/mol)
Molar Mass (N₂): 28.018 g/mol
1 N₂(g) + 3 H₂(g) -----> 2 NH₃(g)
9.3 g H₂ 1 mole 1 mole N₂ 28.018 g
-------------- x ---------------- x -------------------- x ------------------ = 43 g N₂
2.016 g 3 moles H₂ 1 mole
The value of the rate constant at 302°c is 2. 45 × 10-4 l/mol s and at 508°c the rate constant is 0. 0965 l/mol s. the value of r is 8. 3145 j/k mol. Calculate the activation energy for this reaction
The activation energy for this reaction is - 55.5 kJ/mol
Calculation,
Given data,
First temperature [tex]T_{1}[/tex] = 302°C = 302+273 = 575 K
Second temperature [tex]T_{2}[/tex] = 508°C = 508+273 = 781 K
rate constant at 302°C = 2. 45 × [tex]10^{-4}[/tex] lit/mol s
rate constant at 508°C = 0. 0965 lit/mol s.
Value of universal gas constant = 8.3145 J/k mol.
Apply Arrhenius equation,
㏒[tex]K_{1} /K_{2}[/tex] = [tex]E_{a}/2.203R[/tex] [1/ 575 K - 1/781 K]
㏒2. 45×[tex]10^{-4}[/tex] lit/mol s/0.0965 lit/mol s = [tex]E_{a}[/tex] /2.303×8.3145 J/k mol[781-575/575K×781 K]
[tex]E_{a}[/tex] = - 55.5 kJ/mol
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Nh4cl is sometimes preferred instead of hcl or h2so4 for "acid" work-up after grignard reactions, particularly when the expected and desired product is a tertiary alcohol. Why?
Nh4cl is sometimes preferred instead of hcl or h2so4 for "acid" work-up after grignard reactions, particularly when the expected and desired product is a tertiary alcohol because NH4+ is a much milder acid than HCl or H2SO4, which achieve the protonation of
the oxyanion to yield the alcohol while minimizing the risk of dehydration.
Ammonium chloride (NH4Cl) is the used as reagent that quenches the magnesium alkoxide product of the Grignard addition.
It is a proton source without being acidic as in acidic medium the protonation of the tertiary alcohol product and elimination to the alkene.
In the presence of HCl or any other strong acid protonation proceed and form alkene but not with ammonium chloride.
Thus from above we concluded that Nh4cl is preferred instead of hcl or h2so4 for "acid" work-up after grignard reactions.
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Which combination of properties would be expected to lead to the most viscous liquid?
The combination of properties would be expected to lead to the most viscous liquid include:
Low temperatureStrong intermolecular forceWhat is Viscosity?This is defined as the resistance of a liquid to flow and is characterized by its sticky nature.
This is as a result of the strong intermolecular forces which holds the atoms together and low temperature keeps them in shape thereby making it the most appropriate c hoice.
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A. Would sucrase be classified as a oxidoreductase, a transferase, a lysase, an isomerase, a hydrolase, or a ligase enzyme? explain your choice. B. Could sucrase be used to break down another disaccharide, such as lactose? explain your reasoning.
Sucrose, a disaccharide (consisting of two monosaccharides), is table sugar.
A digestive enzyme called sucrase catalyses the breakdown of sucrose into its component sugars, fructose and glucose. One type, sucrase-isomaltase, is secreted at the brush boundary of the small intestine. Invertase, a form of the sucrase enzyme that is more frequently found in plants, also hydrolyzes sucrose but does it in a different way.
What does sucrase break down into ?Maltose is converted to glucose by maltase. Succrase and lactase, respectively, break down other disaccharides like sucrose and lactose. Sucrase and lactase are enzymes that break down sucrose (also known as "table sugar") and lactose (sometimes known as "milk sugar"), respectively, into glucose and fructose.
Both the breakdown of maltose into glucose and the breakdown of sucrose into glucose and fructose are carried out by the enzyme's sucrase subunit.Learn more about Sucrase here:
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What are the hybridization states of the carbon atoms involved in the conversion of trans to cis retinal?
The hybridization states of the carbon atoms involved in the conversion of trans to cis retinal is sp2.
What is Hybridization?
In the process of hybridization, the orbitals of different elements come together to create new orbitals for the atoms. The only characteristics that distinguish the new orbitals from the old orbitals are their energy and shape. It is used to learn about the various bond types, bond lengths, and bond energies that an element may produce.Cis to trans conversion takes place between the double-bonded carbons. Tetrahedral carbons in a single bond are designated as sp3, trigonal planar carbons in a double bond are designated as sp2, and linear carbons are designated as sp.Learn more about the Hybridization of carbon with the help of the given link:
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Draw the major organic product(s) of the reaction of p-bromoaniline with ch3i (excess)
The major product is p-bromo N,N,N -trimethylaniliniumiodide when p-bromoaniline react with excess CH₃I.
When p-bromoaniline react with methyl iodide it produces p-bromo N,N-dimethylaniline.
What happens when p-bromo N,N-dimethylaniline. reacts with excess methyl iodide ?When p-bromo N,N-dimethylaniline reacts with excess methyl iodide leading to the production of p-bromo N,N,N -trimethylaniliniumiodide.
Thus from the above conclusion we can say that The major product is p-bromo N,N,N -trimethylaniliniumiodide. when p-bromoaniline react with excess CH₃I.
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What mass of ch4 is consumed when 587. 9 kj of energy is evolved from the combustion of a mixture of ch4(g) and o2(g)? show the set up and answer with unit. ch4 molar mass = 16. 05 g/mol
Mass of CH₄ is 10.591 g.
The molar mass is a crucial characteristic of the material that is independent of sample size. The coherent unit of molar mass in the International System of Units (SI) is kg/mol. However, molar masses are usually generally given in g/mol due to historical considerations.
A chemical compound's molar mass is calculated by dividing its mass by the number of moles of the substance that make up the sample.
Δg = 587.9 KJ
CH₄ Molar mass = 16.05 g/mol
mol CH₄ = Δg / ΔH°
= 587.9 / 890.3 KJ/ mol
= 0.6603 mol CH₄
Mass CH₄ = 0.6603 × 16.05 g/mol
= 10.591 g
Therefore, the mass of CH₄ is 10.591 g.
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The malonic ester synthesis is a method for preparing carboxylic acids from alkyl halides. For each of the carboxylic acid products, draw the structure of the alkyl bromide that would be used in its synthesis.
Haloalkanes are another name for alkyl halides. Alkyl halides are substances in which halogen atoms have taken the place of one or more hydrogen atoms in an alkane (fluorine, chlorine, bromine, or iodine).
What is the structural property of alkyl bromide?Alkyl halides are halogen-substituted alkanes in which a halogen atom, such as fluorine, chlorine, bromine, or iodine, is used in place of one or more hydrogen atoms in an alkane. An alkyl halide has a link between the carbon atom and the halogen atom, which is sp3-hybridized and has a tetrahedral form.Vinyl halides are substances, as opposed to alkyl halides, in which a halogen atom is attached to a sp2-hybridized carbon atom of a carbon-carbon double bond (C=C). In contrast, aryl halides are substances in which a halogen atom is joined to an aromatic ring's sp2-hybridized carbon atom.Alkyl halides are further divided into primary, secondary, and tertiary alkyl halides based on the level of substitution at the carbon atom holding the halogen. The term "- carbon" refers to the carbon that is bound to a halogen atom. The term "-carbon" refers to the carbon atom that is connected to it. Greek alphabets are then used to represent the neighboring carbons (, and so on).To learn more about Alkyl halides click here-
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How many photons will be required to raise the temperature of 2. 1 gg of water by 1. 7 kk ?
The photon which is required to raise the temperature of 2.1 gm of water by 1.7 kk is 2.16 x [tex]10^{20} photons[/tex]
Given the following data:
Mass of water = [tex]2.1 gm[/tex]
Change in temperature = [tex]1.7 Kelvin[/tex]
Wavelength of infrared = [tex]2.9[/tex] х [tex]10^{-4} cm[/tex]
Specific heat capacity of water = 4.18 J/g°K.
Conversion:
100 cm = 1 m
[tex]2.9 X 10^{-4} cm = 2.9 X 10^{-6}[/tex]
To find the amount of photons required to raise the temperature of 2.1 g of water:
First of all, we would determine the quantity of energy required to raise the temperature of water:
Mathematically, quantity of energy is given by the formula;
[tex]Q = mc[/tex]θ
Where:
Q represents the quantity of energy.
m represents the mass of an object.
c represents the specific heat capacity.
∅ represents the change in temperature.
Substituting the given parameters into the formula, we have;
[tex]Q = 2.1(4.18)(1.7)\\\\Q = 14.92 Joules[/tex]
Mathematically, the Planck-Einstein relation is given by the formula:
[tex]E = hf[/tex]
Where:
h is Planck constant.
f is photon frequency.
To find the photon frequency, we would use this formula:
[tex]Photon frequency = \frac{speed}{wavelength} \\\\Photon frequency = \frac{3(10^{8} )}{2.9(10^{-6} )}\\ \\Photon frequency = \frac{300000000}{0.0000029}\\ \\Photon frequency = 1.04 X 10^{14} Hz[/tex]
Applying Planck-Einstein's relation, we would determine the energy required by each of photon:
[tex]E = 6.626[/tex] х [tex]10^{-34}[/tex] х [tex]1.04[/tex] х [tex]10^{14}[/tex]
[tex]E= 6.89[/tex] х [tex]10^{-20} Joules[/tex]
Now, we can calculate the amount of photons required to raise the temperature of 2.1 g of water by using this expression:
[tex]Number of photons = \frac{Q}{E} \\\\Number of photons = \frac{14.92}{6.89(10^{-20} )}\\ \\Number of photons = 2.16 X 10^{20} photons[/tex]
Disclaimer: Given Question is incomplete, please find the correct question:
Water is exposed to infrared radiation of wavelength 2.9x10-4 cm. Assume that all the radiation is absorbed and converted to heat. How many photons will be required to raise the temperature of 2.1 g of water by 1.7 K? Express your answer using two significant figures.
Thus the concluded that number of photon is 2.16 x [tex]10^{20}[/tex] photons.
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Serotonin acts as a weak base and has a pkb = 3. 84. what is the ph of a solution made by adding 0. 025 m of serotonin in water?
Serotonin acts as a weak base and has a pkb = 3. 84. The ph of a solution made by adding 0. 025 m of serotonin in water is 2.4.
A molecule called serotonin delivers information between nerve cells in the brain and other parts of the body. Body processes like mood, sleep, digestion, nausea, wound healing, bone health, blood clotting, and sexual desire are all significantly influenced by serotonin.
Tryptophan, an important amino acid, is used to make serotonin. This amino acid, which must be ingested by food, is frequently present in foods including nuts, cheese, and red meat. Lower amounts of serotonin can result from tryptophan insufficiency. Anxiety or depression may come from this, among other mood disorders. The chemical serotonin is essential for elevating mood and lowering anxiety.
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Which term describes this molecular shape?
Answer:
B.) Trigonal planar
Explanation:
This molecule has 3 bonds and no lone pairs. The angles are all 120° and the bonds are within the same plane. These molecules have the molecular shape of trigonal planar.
The number of π molecular orbitals in a molecule is always equal to the number of ________. a. p orbitals used to construct the π bonds b. hydrogen atoms in the molecule c. π bonds
The number of π molecular orbitals in a molecule is always equal to the number of p orbitals used to construct the π bonds.
An electron's position and wave-like behavior within a molecule are described by a mathematical function called a molecular orbital. Chemical, as well as physical properties like the probability of locating an electron in a particular area, can be determined using this function.
A molecular orbital would be created when two atomic orbitals cross one other along the internuclear axis. A molecular orbital is created when two atomic orbitals cross each other sideways.
Therefore, the number of π molecular orbitals in a molecule is always equal to the number of p orbitals used to construct the π bonds.
Hence, the correct answer will be option (a).
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A pharmaceutical company wants to test the efficiency of its new drug production techniques so they run 3 shifts of production for 4 hours each and collect the product at the end of each shift. Their chemical engineers predict a maximum of 7000 grams of product can be created each shift. Shift one produces 4562 grams. Shift two produces 5783 grams. Shift three produces 5247 grams. What is the average percent yield for this new production technique?
The percentage yield of the new production technique is 82.8%
What is the percentage yield?Production is the procedure by which finished products are obtained form the raw materials. The production process involves the passing of raw materials through a certain procedure that involves the use of certain machines and equipment to give us the required products.
We are told in the question that there are three shifts;
Shift 1 produces 4562 grams
Shift 2 produces 5783 grams
Shift 3 produces 5247 grams
Average production from the three shifts = 4562 grams + 5783 grams + 5247 grams/3 = 5197 grams
The theoretical average yield is = 7000 grams + 7000 grams + 7000 grams/3 = 7000 grams
Now the percentage yield = actual yield/ theoretical yield * 100/1
percentage yield = 5197 grams/7000 grams * 100/1
percentage yield = 82.8%
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What mass of ch4 is consumed when 587. 9 kj of energy is evolved from the combustion of a mixture of ch4(g) and o2(g)? show the set up and answer with unit
The mass of CH₄ that is consumed is 10.598 g.
What is enthalpy?The enthalpy of a system is defined as the sum of the internal energy of a system and the energy that is produced due to its pressure and volume.
It is given by
H = U+PV
The following reaction takes place during the combustion of CH₄
[tex]CH_4(g)+2O_2(g)\rightarrow CO_2(g)+2H_2O(g)[/tex]
Energy evolved during the combustion, E = 587.9 kJ
Enthalpy of combustion of methane, ∆H = 890.3 kJ
[tex]No of moles of CH_4 =\frac{energy evolved}{enthalpy of combustion}[/tex]
= 587.9 /890
Mass of CH₄ that is consumed = no of moles × molar mass of CH₄
= 587.9 /890 × 16
= 10.598 g
The mass of CH₄ which is consumed is 10.598 g
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What mass of kcl in grams must be added to 500 ml of a 0. 15 m kcl solution to produce a 0. 40 m solution.
91.4 grams
91.4 grams of kcl in grams must be added to 500 ml of a 0. 15 m kcl solution to produce a 0. 40 m solution.
C = mol/volume
2.45M=mol/0.5L
2.45M⋅0.5L = mol
mol = 1.225
Convert no. of moles to grams using the atomic mass of K + Cl
1.225mol * [tex]\frac{39.1+35.5}{mol}[/tex]
mol=1.225
=1.225 mol . [tex]\frac{74.6g}{mol}[/tex]
=1.225 . 74.6
=91.4g
therefore, 91.4 grams of kcl in grams must be added to 500 ml of a 0. 15 m kcl solution to produce a 0. 40 m solution.
What is 1 molar solution?
In order to create a 1 molar (M) solution, 1.0 Gram Molecular Weight of the chemical must be dissolved in 1 liter of water.
58.44 g make up a 1M solution of NaCl.
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What kind of intermolecular forces act between a water molecule and a chloride anion?
The intermolecular forces are present between the molecules and allow their interactions. The ion-dipole force is present between the water and the chloride ion.
What is ion-dipole intermolecular force?Ion-dipole intermolecular forces are present when the molecules have an ion and a neutral molecule that can interlink through an electrostatic attraction. These forces are present in solutions.
The chloride ions have a negative charge, whereas the water molecule has a neutral charge. Water is a polar molecule that has a partial negative and positive charge that can bond with the anion (chloride ion).
Therefore, the water and the chloride ions have ion-dipole intermolecular forces.
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In what ways would adding the nabh4 too early would interfere with your reaction?
NaBH4 is blind + will reduce other functional groups.
Functional groups:
The aldehyde group in o-vanillin would be converted to alcohol if it had been added during step one (imine production). Because the carbon is not sufficiently nucleophilic, p-toluidine would not attack and imine would not form in the maximum yield.
Regardless of the other atoms in the molecule, a functional group is a collection of atoms that have specific chemical characteristics. Covalent bonds bind the atoms in a functional group to the other molecules in the molecule as well as to one another. Examples: Alcohol, Aldehyde, Ketone, Carboxylic acid, Halogens, Double & Triple covalent bonds.
A carbonyl in which the carbon atom is linked to at least one hydrogen atom is called an aldehyde. An R-group or a hydrogen atom could be the other group joined to the carbonyl. Aldehydes are a highly reactive form of carbonyl because of the tiny size of the hydrogen atom, which makes it relatively simple for other molecules to approach the partial positive charge on the carbonyl carbon. Aldehydes are adaptable reactants used in numerous different organic synthesis processes. Numerous aldehydes also have unique tastes and odors.
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Which reason best explains why both venus' and mars' atmospheres are primarily carbon dioxide, but the earth's is much less than 1arbon dioxide?
Because carbon dioxide dissolves in water and is transported by rain to the surface where it combines with rocks to generate carbonates, the Earth's atmosphere contains significantly less carbon dioxide than Venus's atmosphere.
Why does Earth's atmosphere have so much less carbon dioxide compared to Venus?Since Venus' atmosphere is around 100 times thicker than the earth's and extremely dense. Venus must be sufficiently close to the Sun for the little carbon dioxide in its early atmosphere to have heated the surface and released additional carbon dioxide into the atmosphere. Nitrogen makes up 79% of the atmosphere on Earth, along with oxygen (20%) and a trace amount of other gases including carbon dioxide and water vapor. On Venus and Mars, however, carbon dioxide makes up the majority of the atmosphere.
In Venus's original ocean drained, water vapor molecules were dispersed by ultraviolet light, and hydrogen was released into space. There was no longer any surface water, and the amount of carbon dioxide increased.
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What is the formula mass of copper(ii) fluoride?
a. 146.10
b. 165.10
c. 101.55
d. 90.00
e. none of the above
The correct option is (c) 101.55.
Copper fluoride (CuF) -Copper(II) Fluoride Dihydrate is slightly soluble in water and has uses in ceramics and in fluxes used for brazing and soldering.Iodide ions are strong reducing agents. Therefore, Copper (II) Iodide reduces to insoluble copper (I) iodide. Thus making CuI2, CuI. CuI is not stable, so it doesn't exist in solution.Copper(II) fluoride is an inorganic compound with the chemical formula CuF2. It is a white crystalline, hygroscopic solid with a rutile-type crystal structure, similar to other fluorides of chemical formulae MF2 (where M is a metal).What is copper fluoride used for?
Copper fluoride is used in ceramics and in fluxes for brazing and soldering. It is only marginally soluble in water. Fluoride compounds have a wide range of uses in modern science and technology, from etching and oil refining to synthetic organic chemistry and the production of medications.Learn more about copper fluoride
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The temperature coefficient of resistivity for copper is 0. 0068°c-1. if a copper wire has a resistance of 104 ω at 20°c, what is its resistance 80°c?
Electrical resistivity is the measure of the material that can resist the electrical charge. The resistance of the copper wire at 80°C will be 146.43 Ω. Thus, option E is correct.
What is resistance?Electrical resistance is defined as the opposing force that counteracts the electrical charge flow in the material. It is expressed in the terms of the ohms (Ω).
Resistance is calculated as,
R₈₀ = R₀(1 + αΔT)
Given,
Temperature coefficient of resistance (α) = 0.0068 °C⁻¹
ΔT = 60°C
Resistance of a wire (R₀) at 20° C = 104 Ω
Resistance of a wire (R₈₀) at 80°C =?
Substituting values above:
R₈₀ = (104 )[1 + (0.0068)(60)]
R₈₀ = 146.43 Ω
Therefore, option E. 146.43 Ω is the resistance of the copper wire at 80°C.
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Your question is incomplete, but most probably your full question was, The temperature coefficient of resistivity for copper is 0.0068 °C⁻¹. If a copper wire has a resistance of 104 Ω at 20°C, what is its resistance at 80°C?
112.64 Ω 98.56 Ω 84.48 Ω 70.40 Ω 146.43 ΩWhat instrument is used for measuring the heat energy absorbed or released in a chemical reaction?
Drag each tile to the correct location. classify the chemical equations as being balanced or not balanced. 2co 2no → 2co2 n2 6co2 6h2o → c6h12o6 o2 h2co3 → h2o co2 2cu o2 → cuo
A. 2CO + 2NO → 2CO2 + N2 is a balanced equation as the number of carbon, oxygen, and nitrogen atoms are same on both sides.
B. 6CO2 + 6H2O → C6H12O6 + O2 is an imbalanced equation as oxygen atoms are not balanced here.
C. H2CO3 → H2O + CO2 is a balanced equation as same number of hydrogen, carbon, and oxygen are present on both sides.
D. 2Cu + O2 → CuO is an imbalanced equation as both copper and oxygen are imbalanced here.
What is Chemical equation ?A chemical equation is a way to depict a chemical reaction using the symbols and formulas of the components involved. For instance, when zinc metal and diluted sulfuric acid combine, zinc sulphate and hydrogen gas are produced.
Balanced and imbalanced chemical equation -
an equation in chemistry where the number of each sort of atom is equal on both sides. Subscripts are a component of the chemical formulae for the reactants and products that show how many atoms of the previous element there are in each.
The chemical equation is referred to as being imbalanced if the number of atoms of each element present in the reactants and the number of atoms of each element present in the product are not equal.
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Answer: A. 2CO + 2NO → 2CO2 + N2 is a balanced equation as the number of carbon, oxygen, and nitrogen atoms are same on both sides.
B. 6CO2 + 6H2O → C6H12O6 + O2 is an imbalanced equation as oxygen atoms are not balanced here.
C. H2CO3 → H2O + CO2 is a balanced equation as same number of hydrogen, carbon, and oxygen are present on both sides.
D. 2Cu + O2 → CuO is an imbalanced equation as both copper and oxygen are imbalanced here.
What is Chemical equation ?
A chemical equation is a way to depict a chemical reaction using the symbols and formulas of the components involved. For instance, when zinc metal and diluted sulfuric acid combine, zinc sulphate and hydrogen gas are produced.
Balanced and imbalanced chemical equation -
an equation in chemistry where the number of each sort of atom is equal on both sides. Subscripts are a component of the chemical formulae for the reactants and products that show how many atoms of the previous element there are in each.
The chemical equation is referred to as being imbalanced if the number of atoms of each element present in the reactants and the number of atoms of each element present in the product are not equal.
Explanation:
What is the oxidation number for n in the compound nh3? (recall that h usually has an oxidation number of 1.)
The oxidation number for n in the compound [tex]NH_{3}[/tex] will be -3.
The charge an atom would have if all of its links to other atoms formed fully ionic could be known as the oxidation state, also known as the oxidation number. It describes how much an atom in a chemical molecule has been oxidized. The oxidation state can theoretically be positive, negative, and zero.
The oxidation number of N in [tex]NH_{3}[/tex] will be calculated as:
Let the oxidation number of H is 1.
[tex]NH_{3}[/tex] = 0
x + 3(1) = 0
x = -3.
Therefore, the oxidation number for N in the compound [tex]NH_{3}[/tex] will be -3.
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