Typically, amides will hydrolyze under milder conditions than esters.
So, second option is correct one.
In acidic medium, amide interact with the water molecules to give a carboxylic aid and salt of ammonia or amine salt whereas in a basic medium, amides interacts with water molecules to give carboxylic aid and salt of ammonia or amine salt. An amides will hydrolyze under milder conditions because amide is least reactive than ester. The electronegativiy of nitrogen is less than oxygen. So, nitrogen transfer more electron cloud than oxygen towards carbonyl carbon. So, carbonyl group of amide hydrolysis in milder condition than ester.
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Select the correct boxes. which two elements have the same number of valence electrons?
Carbon and silicon have same number of valance electrons which is 4 electrons
Now, Barium is a 2nd group element. So, it has two valance electrons.
Silicon is a 16th group element and it has 4 valance electrons as does the carbon. This is because they both stay in the same group in the periodic table.
Neon is a noble gas which has 8 valance electrons and stays in the 18th group.
Therefore, carbon and silicon have same number of valance electrons which is 4 electrons.
What are Valence electrons ?The electrons in an atom's outermost shell, or energy level, are called valence electrons. For instance, the valence electrons of oxygen are six, with two in the 2s subshell and four in the 2p subshell.
The number of valence electrons for neutral atoms is the same as the number of the atom's main group. A periodic table element's column can be used to determine its main group number. For instance, carbon, which belongs to group 4, has four valence electrons. Group 6 oxygen contains six valence electrons.Learn more about Valence electrons here:
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When cyclohexene is subjected to mercuration in methanol and the resulting mixture is reduced with sodium borohydride, the major organic product is ________.
The primary organic product is a 1:1 mixture of enantiomeric ethers when cyclohexene is subjected to mercuration in methanol and the resulting mixture is reduced with sodium borohydride. The correct option is B.
What is cyclohexene?Cyclohexene is a hydrocarbon with the formula C₆H₁₀ . It has no color and a pungent scent. It is a necessary element in a number of industrial processes. It is not a stable compound.
One butadiene will exist in the s trans form rather than the s-cis form because the energy of s trans is lower than that of s-cis trans.
Thus, the correct option is B) a 1:1 mixture of enantiomeric ethers.
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The question is incomplete. Your complete question is given below:
A) a meso ether.
B) a 1:1 mixture of enantiomeric ethers.
C) a meso diol.
D) a 1:1 mixture of enantiomeric diols.
E) methoxycyclohexane.
Determine the ph of a 1. 0 l buffer prepared by adding 0. 100 moles of naoh to 0. 250 moles of hf. ka for hf = 3. 5 × 10−4
The pH of a 1. 0 l buffer prepared by adding 0. 100 moles of NaOH to 0. 250 moles of HF. ka for HF = 3. 5 × 10−4 is 3.86.
What is Henderson hasselbalch equation?The Henderson hasselbalch equation can be expressed as
pH = pKa + log [base]/ [acid]
Firstly we will calculate the value of pKa
pKa = -logKa
Given,
Ka = 3. 5 × 10−4)
pKa = -log(3. 5 × 10−4)
pKa = 3.46
Now, we will calculate the value of log [base]/ [acid]
Given,
[base] = 0.10m
[acid] = 0.25m
log [base]/ [acid] = log(0.10/0.25)
= 0.4
Putting the values in handerson hasselbalch equation,
pH = 3.46+0.4
= 3.86
Thus, we find that the value of pH of a 1. 0 l buffer prepared by adding 0. 100 moles of NaOH to 0. 250 moles of HF is 3.86.
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How many moles are in 18.8 grams of NaOH
What is the pH of a 1.00 M aqueous solution of a weak diprotic acid H2Y if its Ka1 is equal to 6.9x10-5 and Ka2 is equal to 5.4x10-12
The pH of the diprotic acid H2Y is =
6.15 × 10-17
Calculation of pHA diprotic acid is a type of acid that contains two hydrogen atoms in its molecules which has the ability to be replaced when involved in a chemical reaction.
A weak diprotic acid is the type of acid that yields hydronium ions and bicarbonate ions in small amounts when involved in a chemical reaction.
The pH is defined as the degree of how acidic or how basic a substance is when measured against a scale.
The Ka1 of the weak diprotic acid = 6.9x10-5
The Ka2 of the weak diprotic acid = 5.4x10-12
Using the formula;
pH = (pKa1 + pKa2)/2
pH = (6.9x10-5 + 5.4x10-12)/2
pH= 12.3 ×10-5×10-12
pH= 12.3 × 10-17/2
pH= 6.15 × 10-17
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When hydrochloric acid reacts with magnesium metal, hydro- gen gas and aqueous magnesium chloride are produced. what volume of 5.0 m hcl is required to react completely with 3.00 g of magnesium?
The volume of 5.0 m hcl is required to react completely with 3.00 g of magnesium is 20 L.
Chemical equation:Mg + 2HCl -----MgCl2 + H2
Given,
Molar mass of Mg = 24g/mol
Mole = Given mass/ Molar mass
Mole= 3/24
= 0.125 mol
From the given equation we get to know that
Mol ratio of Mg and HCl is 1:2.
Therefore,
mol of HCl = (2/1) × mol of Mg
=2× 0.125
= 0.25
Molarity = m× V
= M/m
= 5/0.25
= 20L
Thus, we find that the volume of 5.0 m hcl is required to react completely with 3.00 g of magnesium is 20 L.
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This cement should string up and break approximately 1 inch from the slab. Group of answer choices Zinc Phosphate Zinc Oxide Intermediate restorative material Glass Ionomer
The given description details the methods that are used in Mixing Zinc Phosphate for Permanent Cementation,
The complete description contains the following details:
Personal protective equipment (PPE) is required for the healthcare team, and the student is required to identify and prepare the instrument setup.
Equipment and Supplies
• Glass slab (cool)• Spatula (flexible stainless steel)• Zinc phosphate powder and dispenser• Zinc phosphate liquid and dropper• 2 × 2-inch gauze padsWhat is Cementation?This refers to the use of cement to create a building structure that is used to keep things in place.
Hence, we can see that the Procedural Steps include:
Preparing the Mix
1. Dispense the powder toward one end of the slab and the liquid toward the opposite end.
2. Recap the containers.PURPOSE These materials can be affected by prolonged exposure to the humidity.
3. Divide the powder into small increments as directed by the manufacturer.
4. Incorporate each powder increment into the liquid.NOTE When increment sizes vary, smaller increments are used first. Mixing time per increment also varies; the time is approximately 15 to 20 seconds.
5. Spatulate the mix thoroughly, using broad strokes or a figure-8 movement over a large area of the slab.PURPOSE This aids in dissipating the heat generated during mixing.
6. Test material for appropriate cementation consistency. The cement should string up and break about 1 inch from the slab. Total mixing time is approximately 1 to 2 minutes
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A mixture of reactants and products for the reaction shown below is at
equilibrium in a 2.0 L container. What would most likely happen to the
equilibrium if the volume of the container were increased to 4.0 L?
N₂(g) + 3H₂(g)—2NH₂(g)
A. More NH3 would be produced.
B. Less N₂, H₂, and NH3 would be produced.
C. More N₂, H₂, and NH3 would be produced.
D. More N₂ and H₂ would be produced.
If the volume of the container were increased to 4.0 L, more N₂ and H₂ would be produced (Option D)
What is chemical equilibrium?
This is simply defined as a state in a chemical system where there is no observable change in the properties of the system with time.
Principle of chemical equilibriumA French scientist postulated a principle which helps us to understand a chemical system in equilibrium.
The principle states as follow:
If a an external constraint such as change in temperature, pressure or concentration is imposed on a system in equilibrium, the equilibrium will shift so as to neutralize the effect.
How to determine what will happen if the volume of the container is increased from 2 L to 4 LFrom the principle given above, we can see that volume does not affect equilirium position.
However, from Boyle's law, we understood that pressure and volume are in invest relationship.
Thus, increasing volume simply means decreasing pressure.
A decrease in pressure will favors the side where there is an increase in volume.
Let us consider the equation from the question:
N₂(g) + 3H₂(g) <=> 2NH₃(g)
Volume of reactants = 1 + 3 = 4 LVolume of products = 2 LThus, we can conclude that increasing the volume (i.e decreasing the pressure) of the reaction will favors the backward reaction, hence, more N₂ and H₂ would be produced.
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If the heat of vaporization for water is 2260 joules/g. How many kilojoules are released when 5. 00 g of steam is converted to liquid at 100°c?
The latent heat of vaporization 5gram of steam converted to liquid at 100°C is 11.3 KJ.
The latent heat of vaporization for a given substance tells you how much energy is required for one mole of that substance to undergo a phase transition or go from a liquid to a gas, at its boiling point.
Joules per gram, an alternative to the more popular kilojoules per mole, are used to express the latent heat of vaporization for water.
Therefore, we must determine how many kilojoules per gram are needed for a certain sample of water to transition from a liquid to a vapor at its boiling point.
As you know, the conversion factor that exists between Joules and kilojoules is 1 kJ = 10³ J
2260 J/g will be equivalent to
[tex]2260 \frac{J}{g} . \frac{1kJ}{1000J } = 2.26 kJ/g\\\\[/tex]
As we know,
2260 = 2.26 . 10³
which means that 2.26 .10³ = 2260J
This is the latent heat of vaporization 5gram of water= 2260J/g × 5g
= 11,300J
= 11.3 KJ
Therefore, the latent heat of vaporization 5gram of steam converted to liquid at 100°C is 11.3 KJ.
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How many moles of potassium hydroxide are contained in 750. ml of 5. 00 m potassium hydroxide solution?
Number of moles of KOH present in solution is 3.75.
What do you mean by mole concept?The term "mole" refers to a mole's atomic mass, which is expressed in grams. A mole is an element's gram-atomic mass, or mass.
The mole idea equates the mass of a single atom or molecule (measured in a.m.u.) to the mass (measured in grams) of a large collection of equivalent molecules.
To calculate moles of potassium hydroxide in 750 ml of 5.00 m of KOH solution -
Mathematically molarity is expressed as,
Molarity =no. of molecules of solute/volume of solution
Given: Molarity of solution = 5.00 M
Volume of solution = 750 ml = 0.750 l
∴ 5 = no. of moles/0.750
∴ number of moles = 3.75
Hence, number of moles of KOH present in solution is 3.75.
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A substance with a high [h ] would likely have which additional characteristics?
Answer:
Is [h] really [H]? What characteristics are mentioned?
Explanation:
A high [H} means high acid concentration.
A student weighs out 0. 0422 g of magnesium metal. The magnesium metal is reacted with excess hydrochloric acid to produce hydrogen gas. A sample of hydrogen gas is collected over water in a eudiometer at 32. 0°c. The volume of collected gas is 43. 9 ml and the atmospheric pressure is 832 mmhg. Using the experimentally collected data, calculate r and the percent error.
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Select the correct answer.
Two charged objects, A and B, are exerting an electric force on each other. What will happen if the charge on A is increased?
A. The charge on B will decrease.
B. The charge on B will increase.
C. The electric force between A and B will decrease.
D. The electric force between A and B will increase.
According to Coulomb's law of electrostatic forces, as the charge of a body increases, the force exerted also increases. Hence, The electric force between A and B increases as the charge of A increases.
What is Coulomb's law ?Coulomb's law states that, the electrostatic force between two charges is directly proportional to the magnitude of their charges and inversely proportional to the distance between them.
The mathematical expression for Coulomb's law is written as follows:
F = k q1 q2/r²
where, q1 and q2 be the charges r be the distance between them, k is the proportionality constant.
Therefore, as the charge of A increases, irrespective whether the force is attractive or repelling, the electric force between them A and B increases.
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Read the chemical equation. n2 3h2 → 2nh3 using the volume ratio, determine how many liters of nh3 is produced if 1.2 liters of h2 reacts with an excess of n2, if all measurements are taken at the same temperature and pressure?
0.8 liters of NH₃ is produced.
What is Chemical equation?A chemical equation is a symbolic representation of a chemical reaction in the form of symbols and formulae, where the reactant entities are given on the left and the product entities are given on the right, with a plus sign separating the entities in both the reactants and the products and an arrow pointing in the direction of the products to indicate the reaction's direction. The absolute values of the stoichiometric numbers are shown as coefficients next to the symbols and formulas of the entities. Jean Beguin drew the first chemical equation in 1615.
pressure - The SI unit for pressure is the pascal (Pa), which is equal to one newton per square metre (N/m2) of force per unit area of surface. An object's pressure is inversely proportional to the area it is pressing on and inversely proportional to the force it applies.
Given chemical reaction is:
N₂ + 3H₂ → 2NH₃
From the stoichiometry of the reaction, it is clear that:
3 liters of H₂ = produce 2 liters of NH₃
1.2 liters of H₂ = produce 2/3 × 1.2 = 0.8 liters of NH₃
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How will you recognize that a single replacement reaction has occured when you combine an active metal with 6m hcl?
A single replacement or displacement reaction occurs when one ingredient in a compound replaces another. Only another metal can replace a less active one; a metal can only displace another metal, and a non-metal can only displace another non-metal.
Displacement reaction:The tendency of the element to lose electrons is what makes it metallic. Due to their bigger sizes and propensity to lose electrons as size, the number of shells, and nuclear force of attraction rise, the most active metals are found on the left side of the periodic table.
The reaction in which the more reactive element displaces the less reactive element is known as the displacement reaction.
When we combine an active metal with HCl, the reaction is as follows:
We are taking sodium, Na which is the most active metal. It will replace H in HCl because it is more reactive than H.
2Na + 2HCl → 2NaCl + H₂
Three ways to recognize if a single displacement reaction has taken place:
1. Color change
2. Formation of bubbles (a gas)
3. Formation of a precipitate
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If 2. 0 x 1023 argon {ar) atoms strike 4. 0 cm2 of wall per second at a 90° angle to the wall when moving with a speed of 45,000 cm s-1, what pressure {in atm) do they exert on the wall?
If 2. 0 x 1023 argon {Ar) atoms strike 4. 0 [tex]cm^{2}[/tex] of wall per second at a 90° angle to the wall when moving with a speed of 45,000 [tex]cm^{-1}[/tex].The pressure will be 0.295 atm.
The force delivered perpendicularly to an object's surface per unit area across which that force would be dispersed is known as pressure. In comparison to the surrounding pressure, gauge pressure defines the pressure. The units was using to express pressure vary.
Calculation of force:
Force excerted by the Ar atoms, (F) = Change in momentum for one Ar atom 7 / unit time × number of atom
F = 2mv /1s × number of atoms.
Putting the given data in above equation.
F = 2 × 39.95 amu × 450 m/s/ 1s × 1.66 × [tex]10^{-27}[/tex] kg /amu × 2 × [tex]10^{23}[/tex] atom
F = 11.94 N
Now, pressure can be calculated by using the formula:
P = Force exerted /area
P = 11.94 N/ 4.0 [tex]cm^{2}[/tex] × [tex]cm^{2}[/tex]/ [tex]10^{-4} m^{2}[/tex]
P = 0.295 atm
Therefore, the pressure will be 0.295 atm.
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Consider the combustion reaction for octane (C8H18), which is a primary component of gasoline.
2C8 H18 + 25O₂…..16CO2+18H2O
How many moles of CO₂ are emitted into the atmosphere when 16.6 g C8H18 is burned?
CO₂ emitted:
Answer:
1.16 moles CO₂
Explanation:
To find the moles of CO₂, you need to (1) convert grams C₈H₁₈ to moles (via the molar mass) and then (2) convert moles C₈H₁₈ to moles CO₂ (via the mole-to-mole ratio from equation coefficients). It is important that the conversions/ratios are arranged in a way that allows for the cancellation of units. The final answer should have 3 significant figures like the given value.
Molar Mass (C₈H₁₈): 8(12.011 g/mol) + 18(1.008 g/mol)
Molar Mass (C₈H₁₈): 114.232 g/mol
2 C₈H₁₈ + 25 O₂ -----> 16 CO₂ + 18 H₂O
^ ^
16.6 g C₈H₁₈ 1 mole 16 moles CO₂
-------------------- x ----------------- x ------------------------- = 1.16 moles CO₂
114.232 g 2 moles C₈H₁₈
Look at the two question marks between zinc (zn) and arsenic (as). at the time, no elements were known with atomic weights between 65.2 and 75. but mendeleev predicted that two elements must exist with atomic weights in this range. what led mendeleev to predict that two undiscovered elements existed in that range?
Mendeleev positioned elements in the periodic table in increasing order of their atomic numbers, such that elements having identical chemical properties and characteristics plunge into the same group.
What is Mendeleev's periodic table called?
In order to represent similarities and patterns in the behavior of elements, Mendeleev created the periodic table, which is an arrangement of elements in an increasing atomic mass order in tablet form.Mendeleev stated that "Element characteristics are a periodic function of their atomic weight" in his renowned periodic law.The Periodic Table of Mendeleev is a table that Mendeleev created to list elements in the order of their atomic weights.Mendeleev discovered that there were two elements with atomic weights between 65.2 and 75 because he found it very satisfying that the properties of the elements were more similar and closer to this level.He also imagined having other elements with possessions similar to those of these other elements.In the periodic table, he left a blank for these two elements until they were finally discovered in their true existence.Learn more about Mendeleev's periodic table
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In a solution, when the concentrations of a weak acid and its conjugate base are equal, ________.
I don't know the answer
In a solution, when the concentrations of a weak acid and its conjugate base are equal, the -log of the concentration of H+ and the -log of the Ka are equal.
What is Henderson-Hasselbalch equation ?This formula is frequently used to determine the pH of buffer solutions. A weak acid and its conjugate base make up buffer solutions.To find the pH of the buffer solution, we obtain the pKa of the weak acid and add it to the log of the concentration of the conjugate base divided by the concentration of weak acid. So whenever the concentration of the weak acid is equal to the concentration of the conjugate base, the pH of the buffer solution is equal to the pKa of the weak acid.To know more about buffer solutions you can refer to the link below:
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What characteristic of skeletal muscle cells enables them to efficiently extract oxygen from the blood?
Myoglobin in red slow twitch muscle pulls the O2 off the blood. Your striated muscles, which include your cardiac muscles and skeletal muscles, contain the protein known as myoglobin. Its primary job is to give your muscles' cells oxygen (myocytes). Your body's cells require oxygen to function.
Myoglobin is harmful to the kidneys in large doses. Myoglobin can be released in large volumes into the blood stream in response to severe trauma or muscle injuries, which can harm the kidneys and eventually lead to renal failure. A globin and heme molecule combine to form the dark red protein known as myoglobin.
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At 2000 K the partial pressures of an equilibrium mixture of H2S, H2, and S are 0.0151 , 0.0472 , and 0.0352 atm, respectively. Calculate the value of the equilibrium constant Kp at 2000 K.
At 2000 K, if the partial pressures of an equilibrium mixture of H2S, H2, and S are 0.0151 , 0.0472 , and 0.0352 atm, respectively, then the value of the equilibrium constant Kp at 2000 K is 9.089.
What is partial pressure?The pressure that is exerted by one among the mixture of gases if it occupies the same volume on its own is known as Partial pressure.
As we know that,
Kp is the constant of a certain reaction at equilibrium.
For the given chemical reaction:
H2 +S -------H2S
The expression of Kp for above equation follows:
Kp = p(H2S) /{p(H2) ×p(S)}
where,
p(H2S) is the partial pressure of H2S = 0.0151atm
p(H2) is the partial pressure of H2 = 0.0472atm
p(S) is the partial pressure of S = 0.0352 atm
Kp can be calculated as:Kp = 0.0151/(0.0472 × 0.0352)
Kp = 0.0151/0.00166144
Kp = 9.089
Thus, we find that the value of equilibrium constant Kp at 2000K is 9.089.
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Which of the following has the greatest
mass?
pls look at options
Answer:
C.) One mole of mercury
Explanation:
You can determine which has the greatest mass by identifying each of their atomic masses. The atomic mass represents the mass of an element per 1 mole.
Gold (Au): 196.97 g/mol
Mercury (Hg): 200.59 g/mol
Barium (Ba): 137.33 g/mol
In this case, one mole of mercury has the greatest mass.
Which pair of aqueous solutions can create a buffer solution if present in the appropriate concentrations?.
HF and NaF - If the right concentrations of aqueous solutions are present, they can produce a buffer solution.
What are buffer solutions and how do they differ?The two main categories of buffers are acidic buffer solutions and alkaline buffer solutions. Acidic buffers are solutions that contain a weak acid and one of its salts and have a pH below 7. For instance, a buffer solution with a pH of roughly 4.75 is made of acetic acid and sodium acetate.Describe buffer solution via an example.When a weak acid or a weak base is applied in modest amounts, buffer solutions withstand the pH shift. A buffer made of a weak acid and its salt is an example. It is a solution of acetic acid and sodium acetate CH3COOH + CH3COONa.learn more about buffer solutions here
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halogens are active nonmetals why
Answer:
Halogens are among the most active nonmetals due to their electron configuration and number of valence electrons.
For a typical titration, 0. 010 m naoh is the titrant (in the buret). if the initial buret reading is 2. 45 ml, and the final buret reading is 18. 70 ml, how much naoh was used for the titration?
16.25 ml NaOH was used for the titration.
Titration:"The process of calculating the quantity of a material A by adding measured increments of substance B, the titrant, with which it reacts until exact chemical equivalency is obtained (the equivalence point)" is the definition of titration.
A titration is a method for figuring out the concentration of an unknown solution by using a solution with a known concentration. Until the reaction is finished, the titrant (the known solution) is typically added from a buret to a known volume of the analyte (the unknown solution).
0. 010 m NaOH is the titrant (in the buret).
The initial buret reading is 2. 45 ml
The final buret reading is 18. 70 ml
The volume of NaOH = 18.70ml - 2.45 ml
= 16.25 ml
Therefore, 16.25 ml NaOH was used for the titration.
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If ionizing radiation interacts with a human cell, causing it to die after one or more divisions, it is classified as:____.
If ionizing radiation interacts with a human cell, causing it to die after one or more divisions, it is classified as mitotic death.
Hence, Option C is correct answer.
What is Ionizing radiation ?Ionizing radiation is a form of energy which is released by atoms that travels in the form of electromagnetic waves.
Examples: Heat or light from the Sun.
What is Mitotic Death ?Radiation damage to the cell death occurs when cells to attempt to divide with the damaged DNA.
Thus from the above conclusion we can say that If ionizing radiation interacts with a human cell, causing it to die after one or more divisions, it is classified as mitotic death.
Hence, Option C is correct answer.
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Disclaimer: The question was given incomplete on the portal. Here is the complete question.
Question: If ionizing radiation interacts with a human cell, causing it to die after one or more divisions, it is classified as
(A) interference of function
(B) mitotic delay
(C) mitotic death
(D) reproductive death
1) A certain compound has an empirical formula of CH_6O_ 2. Its molar mass is between 285 and 315 g/mol. What is its molecular formula?
CH_6O_2
C_4H_24O_8
C_6H_36O_12
C_5H_30O_10
2) certain compound has an empirical formula of NH_2O. Its molar mass is between 55 and 65 g/mol. What is its molecular formula?
NH_2O
N_2H_2O_2
N_2H_4O_2
N_4H_8O_4
3) A certain compound is found to have the percent composition (by mass) of 88.9 percent C and 11.1 percent H. The molar mass of the compound was found to be 54.0 g/mol. Calculate the empirical formula and the molecular formula.
C_2H_3 and C_4H_6
C_2H_6 and C_3H_9
CH_2 and C_3H_6
CH_3 and C_2H_6
4) The characteristic odor of pineapple is due to ethyl butyrate. It contains 62.07 percent carbon, 10.34 percent hydrogen, and 27.59 percent oxygen. Determine the empirical formula.
C_6H_6O_2
C_6H_12O_2
C_3H_3O
C_3H_6O
5) Zircon is a diamond-like material that has the composition 49.76 percent Zr, 15.32 percent Si, and 34.91 percent O. What is the empirical formula of zircon?
ZrSiO
ZrSiO_2
ZrSiO_3
ZrSiO_4
1. The molecular formula of the compound is C₆H₃₆O₁₂
2. The molecular formula of the compound is N₂H₄O₂
3 The empirical formula and molecular formula of the compound are: C₂H₃ and C₄H₆
4. The empirical formula of the compound is C₃H₆O
5. The empirical formula of the compound is ZrSiO₄
1. How to determine the molecular formula Empirical formula = CH₆O₂Molar mass = (285 + 315) / 2 = 600 / 2 = 300 g/moleMolecular formula =?Molecular formula = empirical × n = molar mass
[CH₆O₂]ₙ = 300
[12 + (6×1) + (16×2)]ₙ = 300
50n = 300
Divide both side by 74
n = 300 / 50
n = 6
Molecular formula = [CH₆O₂]ₙ
Molecular formula = [CH₆O₂]₆
Molecular formula = C₆H₃₆O₁₂
2. How to determine the molecular formula Empirical formula = NH₂OMolar mass = (55 + 65) / 2 = 120 / 2 = 60 g/moleMolecular formula =?Molecular formula = empirical × n = molar mass
[NH₂O]ₙ = 60
[14 + (2×1) + 16]ₙ = 60
32n = 60
Divide both side by 32
n = 60 / 32
n = 2
Molecular formula = [NH₂O]ₙ
Molecular formula = [NH₂O]₂
Molecular formula = N₂H₄O₂
3. How to determine the empirical formula and molecular formulaWe'll begin by obtaining the empirical formula. This is illustrated below:
Carbon (C) = 88.9%Hydrogen (H) = 11.1%Empirical formula =?Divide by their molar mass
C = 88.9 / 12 = 7.4
H = 11.1 / 1 = 11.1
Divide by the smallest
C = 7.4 / 7.4 = 1
H = 11.1 / 7.4 = 3/2
Multiply by 2 to express in whole number
C = 1 × 2 = 2
H = 3/2 × 2 = 3
Thus, the empirical formula of the compound is C₂H₃
Finally, we shall determine the molecular formula of the compound. This is illustrated below:
Molar mass of compound = 54 g/molEmpirical formula = C₂H₃Molecular formula =?Molecular formula = empirical × n = molar mass
[C₂H₃]ₙ = 75.16
[(12×2) + (3×1)]ₙ = 54
27n = 54
Divide both side by 27
n = 54 / 27
n = 2
Molecular formula = [C₂H₃]ₙ
Molecular formula = [C₂H₃]₂
Molecular formula = C₄H₆
4. How to determine the empirical formulaCarbon (C) = 62.07%Hydrogen (H) = 10.34%Oxygen (O) = 27.59%Empirical formula =?Divide by their molar mass
C = 62.07 / 12 = 5.1725
H = 10.34 / 1 = 10.34
O = 27.59 / 16 = 1.724
Divide by the smallest
C = 5.1725 / 1.724 = 3
H = 10.34 / 1.724 = 6
O = 1.724 / 1.724 = 1
Thus, the empirical formula of the compound is C₃H₆O
5. How to determine the empirical formulaZr = 49.76%Si = 15.32%O = 34.91%Empirical formula =?Divide by their molar mass
Zr = 49.76 / 91 = 0.547
Si = 15.32 / 28 = 0.547
O = 34.91 / 16 = 2.182
Divide by the smallest
Zr = 0.547 / 0.547 = 1
Si = 0.547 / 0.547 = 1
O = 2.182 / 0.547 = 4
Thus, the empirical formula of the compound is ZrSiO₄
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If 5. 20 g of HCl is added to enough distilled water to form 3. 00 l of solution. What is the molarity of the solution?
The molarity of the solution is 0.43 M
What is molar concentration or molarity?
A solute's concentration in a solution, specifically the quantity of it per unit volume of solution, is measured by its molar concentration, which is a chemical word. The amount of moles per litre, denoted by the unit sign mol/L or mol/dm3 in SI units, is the most often used unit denoting molarity in chemistry.Calculation of molarity:
Initially, we must change grams of hydrogen chloride into moles.
Moles of solute per L of solution are known as molarity.
M = n/v
where, M=molar concentration,
n = moles of solute,
v= litres of solution
We must divide by the molecular mass to go from grams to moles.
5.20 g of HCl * (1 mole/36.46 g of HCl) = 1.14 moles of HCl
3.0 L x 0.143 moles = 0.429 M HCl ≈ 0.43 M HCl
Therefore it is concluded from the above solution that the molarity of the solution is 0.43 M HCl.
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The chemical process of food breakdown is called ________.
a) absorption
b) ingestion
c) digestion
d) secretion
The chemical process of food breakdown is called digestion.
Based about how food is digested, mechanical digestion versus chemical digestion is the two main types of catabolism. The digestive system's four important processes are motility, digesting, absorption, as well as secretion.
Digestion enzymes break down food as it moves from the mouth through our digestive system, transforming it into more easily absorbed nutrients. Chemical digestion would be the term for this disintegration. Amino acids as well as reducing sugars undergo a chemical reaction when food is processed and cooked at a high temperature, creating various flavors and brown colors.
Therefore, the chemical process of food breakdown is called digestion.
Hence, the correct answer will be option (c).
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Write the empirical formula for at least four ionic compounds that could be formed from the following ions
Answer:
NH₄CN, NH₄IO₃, Fe(CN)₃, Fe(IO₃)₃
Explanation:
Cations (positively charged ions) can only form ionic bonds with anions (negatively charged ions). However, you can't just simply put one cation and one anion together to form a compound. Each compound needs to been neutral, or have an overall charge of 0. When cations and anions do not have charges that perfectly cancel, you need to modify the amount of each ion in the compound.
1.) NH₄CN
-----> NH₄⁺ and CN⁻
-----> +1 + (-1) = 0
2.) NH₄IO₃
-----> NH₄⁺ and IO₃⁻
-----> +1 + (-1) = 0
3.) Fe(CN)₃
-----> Fe³⁺ and CN⁻
-----> +3 + (-1) + (-1) + (-1) = 0
4.) Fe(IO₃)₃
-----> Fe³⁺ and IO₃⁻
-----> +3 + (-1) + (-1) + (-1) = 0
