Answers
The compound NH4Cl or ammonium chloride is composed of two ions: ammonium ion (NH4+) and chloride ion (Cl-). The ammonium ion is a polyatomic cation made up of one nitrogen atom and four hydrogen atoms, while the chloride ion is a monatomic anion made up of one chlorine atom.
Related Questions
Which of the following is TRUE if ΔEsys = -100 J?
Answers
The statement that is true if the ΔEsys = -100 J is that the system looses 100J of energy which is gained by the surroundings.
What is the energy of the system?Note that the study of energy is what we call thermodynamics. We should note that according to the laws of thermodynamics, energy can not be created nor destroyed but can be converted from one form to another.
This implies that the energy that is lost by the system must be gained by the surroundings since there can never be energy that goes to waste in the system.
Recall that the universe is composed of the system and the surroundings and the energy that is lost by the system must be gained by the surroundings and vice versa. This would now be our guide in deciding which statement is right above from what we have in the question here.
Learn more about thermodynamics: https://brainly.com/question/1368306
#SPJ1
(Note: The rate law only depends on the concentration of NO2.) Consider the reaction NO2(g) + CO(g) → NO(g) + CO2(g). The rate law is rate = k[NO2]2. This table shows the data obtained by observing the reaction. What is the value for the rate constant, k (with units)? A: 2.08 × 10-4 s-1 B: -2.08 × 10-4 M-1 s-1 C: 2.08 × 10-4 M-1 s-1 D: -2.08 × 10-4 s-1
Answers
This problem is providing us with the rate law for the reaction between nitrogen dioxide and carbon monoxide to produce nitrogen monoxide and carbon dioxide. Thus, the required rate constant turns out to be C: 2.08 × 10-4 M-1 s-1 as show below:
Chemical kineticsIn chemistry, chemical kinetics is used to study the changes in the amount of a substance that undergoes consumption or production in a chemical reaction with respect to the time.
In this case, considering the attached picture wherein the data is presented, one can write the following version of the rate law:
\(\frac{d[NO_2]}{dt}=-k[NO_2]^2\)
Which can be integrated by parts:
\(\int{\frac{1}{[NO_2]^2 } } \, d[NO_2]=-k\int{}\, dt\\\\\frac{1}{[NO_2]}=kt\)
Which resembles y=mx+b; this means we need to prepare a 1/[NO₂] vs t graph with a trendline, task that can be done on Excel as shown on the second attached file.
Hence, we see the trendline as y = 0.000208x + 1.977, where the slope, 0.000208, is equal to k (rate constant) and with the appropriate units, it will be:
C: 2.08 × 10-4 M-1 s-1
Learn more about chemical kinetics: https://brainly.com/question/26351746
With enough ____________,
_______________, and
__________, the original
sedimentary or igneous rock is
changed to ______________ rock.
Answers
Answer: with enough heat, pressure, and time, the original sedimentary or igneous rock is changed to metamorphic rock.
Explanation:
50 points, and I’ll mark as brainliest!!!
Problem 1. Sea water contains dissolved salts at a total ionic concentration of about 1.13 mol×L–1. What pressure must be applied to prevent osmotic flow of pure water into sea water through a membrane permeable only to water molecules (at 25oC)?
Problem 2. What is the osmotic pressure of a solution prepared by adding 6.65 g of glucose to enough water to make 350 mL of solution at 35°C?
Problem 3. What is the osmotic pressure of a solution prepared by adding 9.0 g of glucose to enough water to make 450 mL of solution at 35°C?
Problem 4. What is the osmotic pressure of a solution prepared by adding 11.0 g of propanol to enough water to make 850 mL of solution at 25°C?
Problem 5. What is the osmotic pressure of a solution prepared by adding 65 g of glucose to enough water to make 35000 mL of solution at 15°C?
Answers
Answer:
Problem 1:
The osmotic pressure, π, can be calculated using the formula:
π = iMRT
where i represents the van't Hoff factor (the number of particles into which a solute dissociates), M represents the molar concentration, R represents the gas constant (0.082 Latm/molK), and T is the temperature in Kelvin.
The osmotic pressure of pure water is 0. As a result, sea water's osmotic pressure must be equal to the pressure necessary to prevent osmosis.
Assuming that sea water is an ideal solution, the total dissolved ion concentration is 1.13 mol/L. Because each dissolved salt molecule dissociates into two ions, the effective particle concentration is 2.26 mol/L.
Filling in the blanks in the formula:
0.918 atm = (2)(2.26 mol/L)(0.082 Latm/molK)(298 K)
Therefore, a pressure of 0.918 atm must be applied to prevent osmotic flow of pure water into sea water.
Problem 2: Glucose has a molar mass of 180.16 g/mol. The solution contains the following number of moles of glucose:
n = 6.65 g / 180.16 g/mol = 0.0369 mol
The molarity of the solution is:
M = n / V = 0.0369 mol / 0.350 L = 0.105 M
Substituting the values into the formula:
π = iMRT = (1)(0.105 M)(0.082 L·atm/mol·K)(308 K) = 2.74 atm
As a result, the osmotic pressure of the solution is 2.74 atm.
Problem 3:
Following the same procedure as in Problem 2, the molarity of the solution is:
M = n / V = 0.02 mol / 0.450 L = 0.044 M
Substituting the values into the formula:
π = iMRT = (1)(0.044 M)(0.082 L·atm/mol·K)(308 K) = 1.14 atm
As a result, the osmotic pressure of the solution is 1.14 atm.
Problem 4:
The molar mass of propanol is 60.10 g/mol. The number of moles of propanol in the solution is:
n = 11.0 g / 60.10 g/mol = 0.183 mol
The molarity of the solution is:
M = n / V = 0.183 mol / 0.850 L = 0.215 M
Substituting the values into the formula:
π = iMRT = (1)(0.215 M)(0.082 L·atm/mol·K)(298 K) = 4.59 atm
Therefore, the osmotic pressure of the solution is 4.59 atm.
Problem 5:
Following the same procedure as in Problem 2, the molarity of the solution is:
M = n / V = 65 g / (180.16 g/mol × 35 L) = 0.104 M
Substituting the values into the formula:
π = iMRT = (1)(0.104 M)(0.082 L·atm/mol·K)(288 K) = 2.06 atm
Therefore, the osmotic pressure of the solution is 2.06 atm.
You are given 10ml (M) 20 Naoh solution in a conical flask and asked to titrate with (M) 20 Hcl and (M) 20 H2so4 separately. calculate the moles of Hcl and H2so4 required to neutralize the Naoh solution
Answers
Answer:
\(n_{HCl}=0.2molHCl\\n_{H_2SO_4}=0.1molH_2SO_4\)
Explanation:
Hello!
In this case, since the reactions between NaOH and the acids are:
\(NaOH+HCl\rightarrow NaCl+H_2O\\\\2NaOH+H_2SO_4\rightarrow Na_2SO_4+2H_2O\)
Whereas we can see the 1:1 and 2:1 mole ratios between NaOH and HCl and H2SO4 respectively. In such a way, at the equivalence point we realize that:
\(n_{HCl}=n_{NaOH}=V_{NaOH}M_{NaOH}=0.01L*20mol/L=0.2molHCl\\\\2n_{H_2SO_4}=n_{NaOH}\\\\n_{H_2SO_4}=\frac{1}{2} V_{NaOH}M_{NaOH}=\frac{0.01L*20mol/L}{2} =0.1molH_2SO_4\)
Best regards!
NEED HELP ASAP !
Which best describes an element?
A. elements are chemicals that are pure substance held together by chemical bonds
B. elements are mixtures of protons, neutrons, and electrons in different combination
C. elements are chemicals that are pure substances represented by symbols that have at least one capital letter
D. elements that are chemicals that are formed when temperature change happens or a precipitate forms
Answers
Answer:
A. Elements are pure substances.
Explanation:
Out of all four answers A would be best. Hope this helps.
Answer:
B
Explanation:
I think all options can define element in one form or another but an element is characterized by the atomic number it has i.e you will know it's Carbon due to it's number of protons, neutrons and/or electrons.
How many ways can 8642 be arranged
Answers
Answer:
In 100 ways
Explanation:
shown below is the reaction of an alkene with an electrophile. reaction for the mechanism step below, draw curved arrows to show electron reorganization. use the arrow tool to specify the origin and the destination of the reorganizing electrons. consult the arrow-pushing i
Answers
The mechanism of the reaction of an alkene with an electrophile attached below
There's 2 steps in reaction between alkene and electrophile
an electrophilic attackThe K in the KI electrophile is attacked by the two pi electrons from the double bond during the first step of the process, which is denoted by a curved arrow. The hydrogen from HBr and a carbon from the double bond combine to produce a C-H sigma bond thanks to the two pi electrons. In order to create a halide anion, the electrons from the H-X bond simultaneously transfer to the halogen. One of the carbons becomes an intermediate carbocation with an electron deficit when pi electrons from the double bond are removed. The positive charge is housed in an unhybridized p orbital on this sp2 hybridized carbon atom.
Nucleophilic attack by halide anion.In order to receive an electron pair from the nucleophilic halide anion, the generated carbocation can now function as an electrophile. The neutral alkyl halide is the end result of electrophilic addition, and the electron pair transforms into an X-C sigma bond.
The HBr, HCl, HI, and HF halides can all take part in this reaction and add on in the same way. Although various halides do react at varying rates, this is because the H-X bond weakens with increasing X due to inadequate orbital overlap.
Your question is incomplete but most probably your full question attached below
Learn more about electrophile attack at https://brainly.com/question/14704243
#SPJ4
Hayley woke up to a hot and humid day but knows it is going to cool off later. What should she expect the weather to be like tonight?
Answers
Answer:
It will most likely rain because cool air cannot hold as much moisture as warm air.
Explanation:
I did the quiz !! :)
I really hope this helps!!!!!!!!!!!! :)
if there are more products than reactants, does that mean there is an increase in the forward or backward reaction? And if there are more reactants that products, is there an increase in the forward or backward reaction?
Answers
Answer:
If there are more products than reactants, that means the reaction has shifted towards the left, which is the backward direction. If there are more reactants than products, that means the reaction has shifted towards the right, which is the forward direction.
How might a flood impact an ecosystem? Select all that apply.
(A) Polluting bodies of water as the floodwater recedes
(B) Primary Succession would begin
(C) Displacing organisms' habitats
(D) Loss of life
Answers
List the 2 pKa's for H2SO4
Answers
Calculate the energy of an electron in the n = 2 level of a hydrogen atom.
Answers
Answer: The energy of an electron in the n = 2 level of a hydrogen atom is 3.40 eV.
Explanation:
Given: n = 2
The relation between energy and \(n^{th}\) orbit of an atom is as follows.
\(E = - \frac{13.6}{n^{2}} eV\)
Substitute the values into above formula as follows.
\(E = - \frac{13.6}{n^{2}} eV\\= - \frac{13.6}{(2)^{2}}\\= - 3.40 eV\)
The negative sign indicates that energy is being released.
Thus, we can conclude that the energy of an electron in the n = 2 level of a hydrogen atom is 3.40 eV.
The bright-line spectra of four elements, G,J, L, and M, and a mixture of at
least two of these elements are given below.
Which elements are present in the mixture?
M
Mixture
750
750
G and J
G and L
M, J, and G
M, J, and L
700
700
650
650
Bright-Line Spectra
600
600
550 500
550
Wavelength (nm)
500
450
450
400
400
.
Answers
Based on the given bright-line spectra and the observed wavelengths in the mixture's spectrum, the elements G and J are the ones present in the mixture.
From the given bright-line spectra and the spectrum of the mixture, we can determine the elements present in the mixture by comparing the specific wavelengths observed. Examining the bright-line spectra, we can identify that G has a distinct wavelength at 650 nm, J at 600 nm, L at 550 nm, and M at 500 nm.
Looking at the spectrum of the mixture, we can observe two prominent wavelengths, 650 nm and 600 nm. These correspond to the wavelengths of G and J, respectively. Since the spectrum of the mixture does not exhibit the wavelengths specific to L (550 nm) or M (500 nm), we can conclude that only G and J are present in the mixture.
Therefore, based on the given bright-line spectra and the observed wavelengths in the mixture's spectrum, the elements G and J are the ones present in the mixture.
This analysis relies on the principle that each element has characteristic wavelengths at which they emit light. By comparing the observed wavelengths in the mixture's spectrum with those of the individual elements, we can determine the elements present in the mixture.
Know more about wavelengths here:
https://brainly.com/question/10750459
#SPJ8
The irreversible isomerization A
B was carried out in a batch reactor and the following concentration time data were obtained:
Time vs Concentration data in a Batch reactor
t 0 3 5 8 10 12 15 7.5
mol/h 4 2.89 2.25 1.45 1.0 0.65 0.25 0.07
Determine the reaction order,
, and the specific reaction a rate constant, k, using any method of your choice.
Answers
The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.
The term "kinetics" refers to the study of reaction rates, which are determined by measuring the concentration of reactants and products as a function of time.Kinetics experiments can be used to determine the reaction rate and order of reaction. A chemical reaction's rate is defined as the change in the concentration of a reactant or product per unit time. The order of a reaction refers to the number of molecules that must react to produce a product. The order of reaction can be determined by measuring the initial rate of the reaction as a function of concentration.Methods for determining the reaction rate order include the initial rate method, the half-life method, and the integrated rate method. The initial rate method determines the reaction order by measuring the initial rate of the reaction at different reactant concentrations. The half-life method determines the reaction order by measuring the time it takes for the reactant concentration to decrease by half.The integrated rate method determines the reaction order by measuring the concentration of the reactant or product at different times.The specific rate constant can be determined by using the Arrhenius equation, which relates the rate constant to the activation energy, temperature, and frequency factor. The frequency factor can be determined by measuring the rate constant at different temperatures.For such more question on polymerization
https://brainly.com/question/1602388
#SPJ8
What sign of chemical change occurs during chemiluminesence?
Production of heat
Production of a gas
Production of light
O Production of a solid (precipitation)
Answers
Answer:
Emission of Light
Explanation:
Chemiluminescence is the emission of light as the result of a chemical reaction, and not a property of a specific compound.
Dont know if you were asking for this but hope it helps
Give the name of HI as an acid and as a binary compound
Answers
Answer:
HI is a diatomic molecular compound known as hydrogen iodide or hydroiodic acid. It is a strong acid.
moles of each product that would form as a result of the decomposition of aspirin
Answers
The decomposition of aspirin (acetylsalicylic acid,\(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)).
The decomposition of aspirin (acetylsalicylic acid, \(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)). To determine the moles of each product formed, we need to consider the balanced chemical equation for the reaction:
\(C_{9} H_{8} O_{4} = > C_{7} H_{6}O_{3} +CH_{3} COOH\)
From the equation, we can see that for every 1 mole of aspirin, 1 mole of salicylic acid and 1 mole of acetic acid are produced.
Therefore, the moles of salicylic acid and acetic acid formed will be equal to the number of moles of aspirin that decomposes. If we know the amount of aspirin in moles, we can directly calculate the moles of each product based on stoichiometry.
For more question on aspirin
https://brainly.com/question/25794846
#SPJ8
6. How many moles are in 8.30 x 1023 molecules of CO₂?
a.
b.
C.
d.
1.37
2.8
55.5
100
Answers
98.96g/mol of CH2O what will be the chemical formula
Answers
Let's break down the molar mass of CH2O:
- Carbon (C) has a molar mass of approximately 12.01 g/mol.
- Hydrogen (H) has a molar mass of approximately 1.01 g/mol.
- Oxygen (O) has a molar mass of approximately 16.00 g/mol.
Now, let's calculate the molar mass of CH2O:
(1 x molar mass of C) + (2 x molar mass of H) + (1 x molar mass of O)
= (1 x 12.01 g/mol) + (2 x 1.01 g/mol) + (1 x 16.00 g/mol)
= 12.01 g/mol + 2.02 g/mol + 16.00 g/mol
= 30.03 g/mol
The molar mass of CH2O is approximately 30.03 g/mol, which is different from the given molar mass of 98.96 g/mol.
It seems that there might be an error or misunderstanding in the given molar mass value. The correct chemical formula for a compound with a molar mass of 98.96 g/mol cannot be determined based on the information provided.
This type of equation is a what reaction?
Answers
Answer:
Decomposition
Explanation:
H2CO3 Breaks down to H2O and CO2
In using the Haber process in the formation of ammonia, what mass of hydrogen is needed to produce 51.0 grams of ammonia? 3 H₂(g) + N2 (g) → 2 NH3(g).
Answers
The mass of hydrogen needed to produce 51.0 grams of ammonia is ≈ 9.07 grams.
To determine the mass of hydrogen required to produce 51.0 grams of ammonia (NH3) using the Haber process, we need to calculate the stoichiometric ratio between hydrogen and ammonia.
From the balanced chemical equation:
3 H₂(g) + N₂(g) → 2 NH₃(g)
We can see that for every 3 moles of hydrogen (H₂), we obtain 2 moles of ammonia (NH₃).
First, we need to convert the given mass of ammonia (51.0 grams) to moles. The molar mass of NH₃ is 17.03 g/mol.
Number of moles of NH₃ = Mass / Molar mass
= 51.0 g / 17.03 g/mol
≈ 2.995 moles
Next, using the stoichiometric ratio, we can calculate the moles of hydrogen required.
Moles of H₂ = (Moles of NH₃ × Coefficient of H₂) / Coefficient of NH₃
= (2.995 moles × 3) / 2
≈ 4.493 moles
Finally, we can convert the moles of hydrogen to mass using the molar mass of hydrogen (2.02 g/mol).
Mass of H₂ = Moles × Molar mass
= 4.493 moles × 2.02 g/mol
≈ 9.07 grams
Therefore, approximately 9.07 grams of hydrogen is needed to produce 51.0 grams of ammonia in the Haber process.
Know more about the mass of hydrogen here:
https://brainly.com/question/14083730
#SPJ8
Sodium carbonate (0.3379 g, FW: 105.99) was dissolved in deionized water to give a solution with a total volume of 250.0 mL. What was the pH of the resulting solution
Answers
Answer:
pH = 11.179
Explanation:
The sodium carbonate, Na2CO3, is in equilibrium with water as follows:
Na2CO3 + H2O ⇆ NaHCO3 + OH⁻
Where Kb is 1.786x10⁻⁴:
Kb = 1.786x10⁻⁴ = [NaHCO3] [OH-] / [Na2CO3]
Where [NaHCO3] = [OH-] = X, our incognite
And [Na2CO3] is molar concentration of sodium carbonate:
[Na2CO3] = 0.3379g * (1mol / 105.99g) = 3.188x10⁻³ moles Na2CO3
In 250.0mL = 0.2500L:
3.188x10⁻³ moles Na2CO3 / 0.2500L = 0.01275M
Replacing in Kb expression:
1.786x10⁻⁴ = [NaHCO3] [OH-] / [Na2CO3]
1.786x10⁻⁴ = [X] [X] / [0.01275]
2.278x10⁻⁶ = X²
X = [OH⁻] = 1.509x10⁻³M
As pOH = -log [OH⁻] = 2.821
And pH = 14 - pOH
pH = 11.179What can scientists learn by studying fossils? I HAVE ANSWER
It is all of them.
how the Earth's climate has changed over time
how species have changed over time
the appearance of an organism and its structures
how the Earth's surface has changed over time
Answers
Answer:
dweyflgyegfuyegfyegrygeyrgyr8ogeyurkgevyrujfryujftewy
Explanation:
jk b or e
What is photosynthesis? Answer in 2-4 sentences, including the words below:
Chemical Reaction
Energy
Answers
Photosynthesis is a chemical reaction in which energy from sunlight is used to convert carbon dioxide and water into glucose and oxygen. This process occurs in the chloroplasts of plant cells and is essential for the survival of plants, as well as for many other organisms that depend on plants for food.
If 6 moles of Al2O3 react, how many moles of O2 are produced?
Answers
Answer:
18 moles O₂
Explanation:
To convert moles of Al₂O₃ to moles O₂, you first need to determine the balanced reaction. Using the reaction coefficients, you can multiply the starting value by the mole-to-mole ratio of the desired substances.
1 Al₂O₃ ---> 3 O₂ + 2 Al
6 moles Al₂O₃ 3 moles O₂
----------------------- x ----------------------- = 18 moles O₂
1 mole Al₂O₃
Based on the diagram where are hydrogen ions found within chloroplast?
Answers
The hydrogen ions build up in high concentration in the lumen of the thylakoid. They pass through an enzyme called ATP synthase, and their movement provides the energy needed to add a third phosphate to ADP (adenosine diphosphate) to form ATP (adenosine triphosphate).
might be a b
Answer:Other dude is right I just took the quiz.
Its B
Explanation
What does (endangered wildlife) mean ?
Answers
Answer:
Hey mate....
Explanation:
This is ur answer.....
A species considered to be facing a very high risk of extinction in the wild.
Hope it helps you,
Mark me as the brainliest...
FOLLOW ME! :)
Answer:
It means when a species in the wildlife is in danger or close to being completely extinct.
Calculate ph of 1,0 mol/l of solution NH4Cl
Answers
Answer:
4.74.
Explanation:
The equilibrium equation for the hydrolysis of NH4+ is:
NH4+ + H2O ⇌ NH4OH + H+
The Cl- ion is a strong base and will not undergo hydrolysis in water. Therefore, the Cl- ion will not affect the pH of the solution.
Use the equilibrium constant for the hydrolysis of NH4+ (Kb) to calculate the pH of the solution.
The expression for the equilibrium constant for the hydrolysis of NH4+ is:
Kb = [NH4OH][H+] / [NH4+]
Given that the concentration of NH4Cl is 1.0 mol/L, the concentration of NH4+ ions is also 1.0 mol/L.
The concentration of hydroxide ions (OH-) can be calculated from the Kb expression:
Kb = [NH4OH][H+] / [NH4+]
[OH-] = Kb * [NH4+]
Knowing that the Kb for NH4+ = 1.810^-5
[OH-] = 1.810^-5 * 1.0 = 1.8*10^-5 M
The pH of the solution is the negative logarithm of the hydroxide ion concentration:
pH = -log([OH-])
pH = -log(1.8*10^-5)
pH = 4.74
Therefore, the pH of 1.0 mol/L solution of NH4Cl is 4.74.
How many atoms are in 12 g of Carbon-12 (12C)?
Answers
There are approximately 6.022 × 10^23 atoms in 12 grams of Carbon-12 (12C).
The number of atoms in a given amount of a substance can be calculated using Avogadro's number, which represents the number of atoms or molecules in one mole of a substance. Avogadro's number is approximately 6.022 × 10^23.
Carbon-12 is a specific isotope of carbon, with an atomic mass of 12 atomic mass units (amu). One mole of Carbon-12 has a mass of 12 grams. Since one mole of any substance contains Avogadro's number of particles, in the case of Carbon-12, it contains 6.022 × 10^23 atoms.
Therefore, if we have 12 grams of Carbon-12, which is equal to one mole, we can conclude that there are approximately 6.022 × 10^23 atoms in this amount of Carbon-12.
In summary, 12 grams of Carbon-12 contains approximately 6.022 × 10^23 atoms. Avogadro's number allows us to relate the mass of a substance to the number of atoms or molecules it contains, providing a fundamental concept in chemistry and enabling us to quantify and understand the microscopic world of atoms and molecules.
for such more questions on atoms
https://brainly.com/question/6258301
#SPJ8