Calcium hydroxide reacts with carbon dioxide gives water and calcium carbonate. The balanced equation for the reaction is written as:
[tex]\rm Ca(OH)_{2} + CO_{2} \rightarrow CaCO_{3} + H_{2}O[/tex]
What is calcium carbonate?Calcium carbonate is commonly called limestone. Limestone is mineral deposit found in many living and nonliving things. Rocks and shells of some organisms are major sources of calcium carbonate.
Calcium carbonate can be prepared by passing carbon dioxide through quicklime or calcium oxide CaO. Calcium carbonate will precipitate in a milky solution.
Limestone can also be prepared by the reaction of calcium hydroxide or soda lime with carbon dioxide. Each reacts in one mole and gives one mole of each product as written in the balanced reaction.
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Your question is incomplete. But your complete question probably was:
Calcium hydroxide solution and carbon dioxide gas yields solid calcium carbonate and liquid water. Write the balanced equation for this reaction.
Gifblaar is a small south african shrub and one of the most poisonous plants known because it contains fluoroacetic acid (fch2cooh), which has a pkaof 2. 59.
The concentration of fluoroacetic acid in a solution is [tex]5.69*10^-^3M .[/tex]
What is dissociation of acids?
In an aqueous solution, an acid dissociates into hydrogen ions (H+) and anions. The molecules of a strong acid dissociate, resulting in a high concentration of H+.
It is calculated by:
Ka = [tex]\frac{[A^-][H^+]}{[H^+]}[/tex]
The dissociation of HCl is given as follows:
HCl ⇄ [tex]H^+[/tex] + [tex]Cl^-[/tex]
The concentration of H+ ion = 0.00275 M.
So,
pH = -log[tex][H^+][/tex]
pH = -log[tex][0.00275M][/tex]
pH = 2.56
According to question
pH of HCl = pH of fluoroacetic acid
The dissociation of fluoroacetic acid is given as follows:
[tex]FCH^2COOH[/tex] ⇄ [tex]FCH_2COO^-[/tex] + [tex]H^+[/tex]
Ka = [tex]\frac{[FCH^2COO^-][H^+]}{FCH^2COOH}[/tex]
pKa = -log [Ka]
2.59 = -log [Ka]
Ka = [tex]2.57*10^-^3[/tex]
According to ICE table:
[tex]FCH^2COOH[/tex] ⇄ [tex]FCH_2COO^-[/tex] + [tex]H^+[/tex]
I C 0 0
C -x +x +x
E C-x x x
According to the equation:
Ka = [tex]\frac{[FCH^2COO^-][H^+]}{FCH^2COOH}[/tex]
[tex]2.57*10^-^3[/tex] = [tex]\frac{x.x}{C-x}[/tex]
[tex]2.57*10^-^3[/tex] = [tex]\frac{x^2}{C-x}[/tex]
x = 0.00275M
[tex]2.57*10^-^3[/tex] = [tex]\frac{0.00275^2}{C-0.00275}[/tex]
Solving for C,
C = 0.00569M or [tex]5.69*10^-^3M .[/tex]
The concentration of fluoroacetic acid in a solution is [tex]5.69*10^-^3M .[/tex]
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identify the high-temperature molar specific heat at constant volume for a triatomic ideal gas of the linear molecules.
The two specific temperatures of gas CPCV have a ratio of 1.66 to 1.40 in a gas containing triatomic molecules.
Which of the following is true for a monatomic ideal gas's molar specific heat when the volume is constant?The amount of energy needed to raise the temperature of one mole of a gas by one degree Celsius at a fixed volume is known as the molar specific heat capacity (Cv) of a gas. It has a value of 3R/2 for monatomic ideal gas and 5R/2 for diatomic ideal gas.
What one of the following describes an ideal gas?The molecules of a perfect gas are always moving at random. Before colliding with another molecule or the surface, they go straight ahead.
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How has the discovery of DNA affected the classification of protists?
Why is it important to conduct multiple trials of an investigation to determine the melting point of ice?.
Answer:
A
Explanation:
# of protons , number of neutrons and # of electrons
Answer:
Explanation:
Nitrogen-15: 7electrons, 7protons, 8neutrons.
Nitrogen-20: 7electrons, 7protons, 13neutrons.
Sulphur-23: 16electrons, 16protons, 7neutrons.
Sulphur-25: 16electrons, 16protons, 9neutrons.
If the half-life of a radioactive element is 18 days, what percentage of the original sample would be left after 108 days?.
1.56% would be the percentage of the original sample would be left after 108 days.
What is a radioactive element?
Radioactive elements are composed of atoms with unstable nuclei and emit atomic radiation as part of the stabilization process. Emission of radiation transforms radioactive atoms into different chemical elements. This chemical element is either stable or highly radioactive, so it decays further. Since some elements in nuclei are unstable due to the presence of excess nuclear charge, these nuclei undergo radioactive decay to form stable nuclei. These elements are called radioactive elements.
The nuclear stability of the elements can be calculated from the n/p (neutron-proton ratio). Elements with atomic numbers up to Z=20 are stable and contain the same number of protons and neutrons. As the atomic number increases, the repulsion between protons increases, requiring more protons and neutrons. Therefore, the neutron-to-proton ratio of stable nuclei increases with increasing atomic number.
Therefore, 1.56% would be the percentage of the original sample would be left after 108 days.
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calculate the gibbs energy of mixing (in j) when 0.50 mol c6h14 (hexane) is mixed with 2.00 mol c7h16 (heptane) at 298 k. treat the solution as ideal.
And at the end we will calculate enthalpy by expressing it from the following equation:ΔmixH=ΔmixG+TΔmixS=−3.43⋅103J+(298K)(11.5JK−1)=−3.43⋅103J+3.43⋅103J=0J/mol ΔmixH=ΔmixG+TΔmix S=−3.43⋅103J+(298K)(11.5JK−1)=−3.43⋅103J+3.43⋅103J=0J/mol
What is Delta G of mixing?ΔG is Gibbs free energy change. For an ideal solution. ΔHmix=0. ΔG<0 i.e., negative. ΔG=ΔH−TΔS.
How do you calculate enthalpy of mix?The molar enthalpy HA+ B of a mixture of A + B can be obtained by combining the molar excess enthalpy H E with the molar enthalpies H A and HB of its pure components: HA + B = XA HA + XB HB + H E, (1) where x denotes mole fraction.
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Drag the tiles to the correct locations. each tile can be used more than once, but not all tiles will be used. some locations will remain empty. chloramine has the chemical formula nh2cl. nitrogen has five valence electrons, each hydrogen has one valence electron, and chlorine has seven valence electrons. complete the lewis structure for this covalent compound. an uppercase n indicates the symbol of the nitrogen atom. an uppercase h indicates the symbol of the hydrogen atom. a dash indicates a single bond. a vertical line. parallel double dashes indicate a double bond. three parallel dashes indicate a triple bond. two solid dots represent a lone pair of electrons. two solid vertical dots represent a lone pair of electrons. one solid dot represents an electron.
The Lewis structure for chloramine is N-H-H | | Cl.
What is chloramine?
Chloramines are ammonia and organic amine derivatives in which one or even more N-H bonds have been changed to N-Cl bonds. The classes of compounds that are taken into consideration are organic and inorganic chloramines. The three substances that make up inorganic chloramines are monochloramine (NH2Cl), dichloramine (NHCl2), as well as nitrogen trichloride (NCl3). The importance of monochloramine as a water disinfectant is considerable. The NCl functional group is joined to the an organic substituent in organic chloramines. N-Chloromorpholine, N-Chloropiperidine, as well as N-Chloroquinuclidinium Chloride are a few examples.
The nitrogen atom has 5 valence electrons and is represented by an uppercase N. The two hydrogen atoms each have 1 valence electron and are represented by an uppercase H. The chlorine atom has 7 valence electrons and is represented by a lowercase Cl. The nitrogen atom is connected to the two hydrogen atoms by single bonds (represented by a dash). The chlorine atom is connected to the nitrogen atom by a single bond (represented by a dash). There are two lone pairs of electrons (represented by two solid dots) around the nitrogen atom.
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(Atomic mae ued are C = 12. 0 g mol–1, O = 16. 0 g mol–1, H = 1. 01 g mol–1, Cu = 63. 5 g mol–1,)
1. How many mole are there in 5. 0 g of methanol (CH3OH)?
2. How many molecule of CuCO3 would weigh 9. 0 g?
3. How many mole would 3. 0 g of cyclohexane (C6H12) contain?
4. How much would 4. 00 mole of benzene weigh?
5. What i the ma of 1000 atom of calcium?
1) Mole are there in 5. 0 g of methanol is 0.147 mol.
2) molecule of CuCO₃ would weigh 9. 0 g
3) mole would 3. 0 g of cyclohexane is 0.035 mol
4) 4. 00 mole of benzene weigh is 312.44 g
5) mass of 1000 atom of calcium is 40000 u.
1) Moles are there in 5. 0 g of methanol is CH₃OH :
molar mass of CH₃OH = 34 g / mol
moles of CH₃OH = mass / molar mass
= 5 / 34
= 0.147 mol
2) moles of CuCO₃ = mass / molar mass
= 9 / 123.55
= 0.0728 mol
molecules of CuCO₃ = 6.022 × 10²³ × 0.0728
= 0.438 × 10²³ molecules
3) Mole would 3. 0 g of cyclohexane (C₆H₁₂) :
moles of C₆H₁₂ = mass / molar mass
= 3 / 84.16
= 0.035 mol
4) 4. 00 mole of benzene weigh :
moles = mass / molar mass
mass = moles × molar mass
mass = 4 × 78.11
mass = 312.44 g
5) mass of 1000 atom of calcium :
mass of 1 calcium atom = 40 u
maa of 1000 atom = 40000 u.
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a current of 0.450 a passed for 20.0 min through a cuso4 solution. calculate the amount of copper deposited.
The amount of copper deposited is 0.1778 grams.
The electrolysis reaction for CuSO₄ solution
Cathode : Cu⁺² + 2e → CuAnode : 2H₂O → 4H⁺ + 4e + O₂Copper deposits will occur at the cathode. According to Faraday's law the number of moles of an electron
ne = It ÷ 96,500
I = the magnitude of the current (Ampere)t = the interval time (s) t = 20 min = 20 × 60 = 1,200 sne = the number of moles for electronne = (0.450 × 1,200) ÷ 96,500
ne = 540 ÷ 96,500
ne = 5.6 × 10⁻³ mol
The ratio of the coefficients of each element is equal to the ratio of the number of moles.
ne : n Cu = 2 : 1
n Cu = ne ÷ 2
n Cu = (5.6 × 10⁻³) ÷ 2
n Cu = 2.8 × 10⁻³ mol
Calculate the amount of copper
The molar mass for copper = 63.5
m = n × molar mass
m = 2.8 × 10⁻³ × 63.5
m = 0.1778 grams
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the highest value in the blosum62 matrix is 11 for (w, w). what does this tell us about the amino acid represented by w (tryptophan)?
The highest value of the blosum62 matrix for Tryptophan amino acids depicts that this amino acid is conserved when two proteins are aligned.
What is the Blosum62 scoring matrix?For BLASTP, the default scoring matrix is the BLOSUM62 matrix. By examining the rates of amino acid alterations in collections of related proteins, the BLOSUM62 matrix was created. When two proteins were aligned, the amino acid sequences inside each cluster, or block, were at least 62% identical. Researchers computed the rates of all amino acid changes that have taken place in these conserved protein building blocks. The BLOSUM62 score matrix for amino acid substitutions was subsequently created using this data. Cysteine, tryptophan, and histidine, which have the highest scores, are the amino acids that are most highly conserved.
What is Amino acid?The building components of protein are amino acids. A hydrogen atom, a basic amino group, a carboxylic acid group, a side-chain group, and an R-group are all connected to the core carbon atom of each molecule. The R-group distinguishes amino acids from one another.
Hence, the highest value of the blosum62 matrix for Tryptophan amino acids depicts that this amino acid is conserved when two proteins are aligned.
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The distance to the moon is 238,855 miles. How many meters is this? Record your answer in scientific notation.
Answer:
384399861 meters
Explanation:
substituting residues in a peptide with which amino acid will most likely result in a peptide with an increased pi?
It has been established that a similar substitution, in which glutamate is switched out for lysine, can lead to mutant proteins that are less stable as dimers or less capable of binding DNA.
What happens if valine is used instead of glutamic acid?A nucleotide error that results in the synthesis of aberrant beta-chains in hemoglobin S, the single amino acid substitution of valine for glutamic acid in the beta-chain that causes sickle cell anemia.
Which four substituents are present on all amino acids?In amino acids, the four valency positions of the core carbon atom are occupied by four substituent groups (alpha carbon). These include the following: hydrogen, carboxyl group, amino group, and a variable group known as the R group. As a result of the substituent, amino acids are also known as substituted methanes.
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write both a ablacnced molecular eation and a net ionic equation for each precipitation reaction observed in this experiment
Balanced molecular equation and a net ionic equation for precipitation reaction with example is as follows:
Molecular equation
Hg₂(NO₃)₂ (aq) + KI(aq) ⇒Hg₂I₂(s) + 2KNO₃(aq)
Total Ionic equation
Hg²⁺(aq) + 2NO³⁻(aq) + 2K⁺aq) ⇒Hg₂I₂(s) + 2K⁺(aq) + NO³⁻ (aq)
Net Ionic equation
Hg²⁺(aq) + 2I⁻(aq) ⇒ Hg₂I₂(s)
The only reference to a chemical equation is a balanced equation. Any ionic substances or acids are represented in a molecular equation as neutral compounds using their chemical formulae. The state of each substance is listed in parenthesis after the formula. In contrast to a net ionic equation, which only shows the chemical species participating in a reaction, a complete ionic equation also includes the spectator ions.
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What would happen to the concentrations of pyruvate, nadh and intermembrane h+ if glycolysis stopped working?.
The concentrations of pyruvate, NADH and intermembrane H⁺ if glycolysis stopped working is the pyruvate will decreases , the NADH will decreases and the intermembrane H⁺ will also decreases.
The glycolysis is the ,metabolic process steps in the cellular respiration. the glucose will convert to the pyruvate molecules in the presence of the oxygen and will convert in to the lactate in the absence of the oxygen. The production of the pyruvate , NADH and the intermembrane depends on the glycolysis . so when the glycolysis will stopped working all the three will decrease.
Thus, the pyruvate, NADH and intermembrane H⁺ decrease when the glycolysis stop working.
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how do intermolecular and intramolecular forces interact when dissolving solutes in water
Answer:
Intramolecular forces are the forces that hold atoms together within a molecule. Intermolecular forces are forces that exist between molecules.The stronger the intermolecular forces between solute molecule and solvent molecule, the greater the solubility of the solute in the solvent.
Intermolecular and intramolecular forces determine the solubility of solutes in water. As the polar solute dissolves in a polar solvent and nonpolar dissolves in nonpolar.
What are intermolecular forces?Intermolecular forces can be defined as the attractive forces and repulsive forces that develop between the molecules of a substance. These forces decide most of the chemical properties and physical properties of matter. The intermolecular forces between the molecules are known as Vander Waals forces.
Forces between the molecules themselves are known as intermolecular forces. The particles are held together by intermolecular forces while forces present within one molecule are known as intramolecular forces.
The intermolecular forces can be described as Dipole-Dipole Interactions, Ion-Dipole, Ion-Induced Dipole, Dipole-Induced Dipole Interactions, and Dispersion Forces.
Polar solute shows attractive intermolecular forces for polar solvents while nonpolar solute dissolves in nonpolar solvents. Intermolecular forces help dissolving solutes in water.
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A student performs four trials of an investigation to determine the boiling point of water. How should the student handle the results?(1 point).
The student should take the average of the results from all four trials to obtain the highest level of accuracy.
What is precision?Chemistry's definition of accuracy is how closely a measurement resembles the actual value.
Three categories of accuracy exist:
1) Point accuracy signifies that accuracy is present only at that scale point.
It provides no details regarding the instrument's accuracy.
2)Percentage of true value - The accuracy is assessed by identifying the instrument's accuracy and contrasting it with the true value that was measured.
3)Percentage of scale range – The accuracy is what determines the measurement's accuracy.
Up to 0.5 percent of instrument accuracy is disregarded. By taking multiple measurements and accounting for human error, measurement accuracy can be improved.
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Write the balanced NET ionic
equation for the reaction when
aqueous Cs3PO4 and aqueous
AgNO3 are mixed in solution to
form solid Ag3PO4 and aqueous
CsNO3 Be sure to include the
proper phases for all species
within the reaction.
The balanced NET ionic equation for the reaction when aqueous Cs₃PO₄ and aqueous AgNO₃ are mixed in solution to form solid Ag₃PO₄ and aqueous CsNO₃ is: PO₄³⁻(aq.) + 3Ag⁺(aq.) → Ag₃PO₄ (s)
What is ionic equation?If the electrolytes in an aqueous solution are stated as dissociated ions in a chemical equation, the equation is known as an ionic equation.
In this case, since the net ionic equation of a chemical reaction shows up the ionic species that result from the simplification of the spectator ions, which are those at both reactants and products sides, we take into account that aqueous species ionize into ions whereas liquid, solid and gas species remain unionized. In such a way, for the reaction of cesium phosphate and silver nitrate. The equation becomes:
Cs₃PO₄ (aq.) + 3AgNO₃ (aq.) → Ag₃PO₄ (s) + 3CsNO₃ (aq.)
Whereas the three aqueous salts are ionized in order to write the following complete ionic equation:
3Cs⁺(aq.) + PO₄³⁻(aq.) + 3Ag⁺(aq.) + 3NO₃⁻(aq.) → Ag₃PO₄(s) + 3Cs⁺(aq.) + 3NO₃⁻(aq.)
In such a way, since the cesium and nitrate ions are the spectator ions because of the aforementioned, the net ionic equation turns out:
PO₄³⁻(aq.) + 3Ag⁺(aq.) → Ag₃PO₄ (s)
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Which is least likely to get reduced
URGENT
Cu2+
Zn2+
Fe3+
Fe2+
The electropositive ion that is least likely to get reduced is Zn²⁺ (option B).
What is electropositivity?Electropositivity in chemistry is tendency of an element to release electrons to form a chemical bond or positively charged cations.
Electropositivity is primarily exhibited by metallic elements, especially the alkali metals and the alkaline earth metals.
Electropositivity is the opposite of electronegativity, which is a measure of the tendency of an atom to gain electrons and form negatively charged anions. Therefore, highly electropositive elements have very low electronegativities and vice versa.
Based on the cations given in this question, zinc (Zn²⁺) is the most electropositive, hence, has the least tendency to be reduced i.e. gain electrons.
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What coefficients of fe, o2 and fe2o3 will show that matter is conserved in this chemical reaction?.
Tally the number of atoms based on subscript. Fe + O2 → Fe2O3. In this scenario, since there are now 6O atoms on the left, there must also be 6O atoms on the right. Step 2: Begin balancing the simple molecules first.
Is the equation 4 Fe 3 O2 2 fe2o3 balanced or not?The number of Fe is actually equal on both sides, and the same is true for O2, so the equation is balanced.
What happens when steam and iron oxide interact?We can also see that the ratio of hydrogen to oxygen is off. Let's add four oxygen atoms in front of the H2O molecule on the reactant side since iron oxide contains four oxygen atoms. Iron reacts with steam to produce hydrogen gas and iron oxide. Note: When steam is applied to a red-hot iron, iron oxide and hydrogen gas are produced.
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Barium metal crystallizes in a body-centered cubic lattice (the Ba atoms are at the lattice points only). The unit cell edge length is 502 pm, and the density of the metal is 3. 50 g/cm3. Using this information, calculate Avogadro's number. [Hint: First calculate the volume (in cm3) occupied by 1 mole of Ba atoms in the unit cells. Next calculate the volume (in cm3) occupied by one Ba atom in the unit cell. Assume that 68% of the unit cell is occupied by Ba atoms. ]
The Avogadro' s number is 6.022×10²³
What is body centered cubic lattice?
The Bravis lattice of the same name serves as the basis for the BCC crystal structure, which has one atom per lattice point at each of the cube's four corners and in its centre. BCC's high proportion of nearest and next-nearest neighbours contributes to its tight proximity and excellent stability.
atomic mass of Ba = 137.327u
No. of atoms of Ba in a BCC unit cell = 2
Edge length of unit cell= 502pm =502ₓ10⁻¹⁰ cm
density =3.50g/cm³
ρ=ZM/N₀ₓV
3.50=2ₓ137.327/N₀ₓ(502ₓ10⁻¹⁰)³
=78.47257/1.265ₓ10⁻²²
N₀=6.02ₓ10²³
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What happens to the other ions that are not attracted to the electrodes?
Ions can be made by single element or covalently bonded group of elements. The covalently bonded group of elements is called polyatomic ions or polyatomic atoms. Therefore, the other ions that are not attracted to the electrodes form salt.
What is Ions?Any species that contain charge whether it is positive charge or negative charge is called ions. The example of polyatomic ions are sulfate, phosphate, nitrate etc.
Cation is the species that loose electron and attain positive charge while anion is a species which gain electron and attains negative charge so when anion and cation combine in fixed ration the the overall charge of the molecule is zero that is molecule is neutral, the charge over cation and anion is also called oxidation state.
Positive ions are attracted towards negative electrode and negative ions are attracted toward positive electrodes. the ions which are not attracted to either of the electrode, these form salt with the other ion remaining in the electrolyte.
Therefore, the other ions that are not attracted to the electrodes form salt.
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What is the pressure of a gas in torr if its pressure is 305 kPa?
Answer:
the pressure of the gas in torr is 2280 torr
Explanation:
The pressure of a gas in torr can be calculated by converting its pressure in kPa to atmospheres and then converting the atmospheric pressure to torr.
One atmosphere is equal to 101.325 kPa. Therefore, the pressure of the gas in atmospheres is 305 kPa / 101.325 kPa/atm = 3.00 atm.
One torr is equal to 1/760 of an atmosphere. Therefore, the pressure of the gas in torr is 3.00 atm * 760 torr/atm = 2280 torr.
Therefore, the pressure of the gas in torr is 2280 torr
calculate the phph of a solution in which one normal adult dose of aspirin (640 mgmg ) is dissolved in 6.0 ounces of water.
The pH of the solution in which one normal adult dose aspirin is dissolved is 2.6 .
Given,
mass of aspirin = 640 mg = 0.640 g
volume of water = 6 ounces = 6 × 0.0295735 L = 0.177441 L
molar mass of aspirin = 180.16 g/mol
moles of aspirin = mass / molar mass = 0.00355 mol
The pH of the solution is as follows,
concentration of aspirin = moles of Aspirin / volume of water
= 0.00355 / 0.177441
= 0.021 M
Given that pKa of Aspirin = 3.5
pKa = -logKa
Therefore, Ka = 3.162 × 10⁻⁴
From the Ice table
3.162 × 10⁻⁴ = [x + H⁺]/[aspirin] = [x²]/[0.021 - x]
Given that the value of Ka is small so we will ignore -x
x² = 3.162 × 10⁻⁴ × 0.021
x = 2.576 × 10⁻³
Therefore,
[ H⁺ ] = 2.576 × 10⁻³
given that
pH = - Log [ H⁺ ]
= - ( -3 + log 2.576 )
= 2.58 ≈ 2.6
Hence we can conclude that The pH of the solution in which one normal adult dose aspirin is dissolved is 2.6 .
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joe is getting his energy expenditure measured by direct calorimetry. the 1 liter of water surrounding the chamber has an initial reading of 15 degrees celsius. the final reading is 2015 degrees celsius. how many calories did he expend?
Joe is getting his energy expenditure measured by direct calorimetry, and 1 liter of water surrounding chamber has an initial reading of 15 degrees Celsius. Final reading is 2015 degrees Celsius. Calories that he expend is 2,000 degree Celsius.
What is direct calorimetry?Direct calorimetry obtains direct measurement of the amount of heat generated by body within a structure large enough to permit moderate amounts of activity. These structures are known as whole-room calorimeters. Direct calorimetry gives a measure of energy expended in the form of heat.
Direct calorimetry provides the user with unique capacity to quantify the heat produced from aerobic and anaerobic metabolism by measuring heat exchange between body and the environment.
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How many isomers have a dichlorocyclobutane ?
Answer:
The three isomers of trans-1, 2-dichlorocyclobutane are as follows: The stereoisomers are those compound which differs in configuration. The stereoisomer of trans-1, 2-dichlorocyclobutane is cis-1, 2-dichlorocyclobutane.
Facilitated diffusion is used to transport
sugars and amino acids.
H2O and O2.
CO2 and O2.
CO2 and H2O.
sugars and H2O.
Water(h2o), carbon dioxide(co2), and oxygen(o2) can move through a plasma membrane by simple diffusion.
What is simple diffusion in plasma membrane?Na+ is the substance which would have the most trouble crossing a biological membrane through diffusion.Consider substances like carbon dioxide and oxygen (O2) that can easily travel through the lipid bilayer of a cell membrane (CO2). These minute, lipid-soluble gas molecules and other small particles can diffuse in the membrane and migrate along a gradient of concentration to enter or exit the cell.Simple diffusion is a type of passive transport where molecules move across a cell membrane from This is the movement of a substance from a region of higher concentration to that of a lower concentration.Polar and charged substances typically have most difficulty passing through a lipid bilayer due to repulsive actions thereby making option D the most appropriate choice.one side where they are more concentrated to the other. O2 often diffuses into cells because it is more concentrated outside of them, and CO2 usually diffuses out of cells because it is more concentrated inside.Facilitated diffusion therefore allows polar and charged molecules, such as carbohydrates, amino acids, nucleosides, and ions, to cross the plasma membrane. Two classes of proteins that mediate facilitated diffusion are generally distinguished: carrier proteins and channel proteins.To learn more about amino acids refer to:
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Q.8
Which of the following would increase the amount of H₃O⁺¹ ions in a solution?
A. increasing the concentration of the base in the solution
B. increasing the strength of the base in the solution
C. increasing the strength of the acid in the solution
D. decreasing the concentration of the acid in the solution
Q.9
Which of the following would decrease the amount of H₃O⁺¹ ions in a solution?
A. increasing the concentration of the base in the solution
B. decreasing the strength of the base in the solution
C. increasing the strength of the acid in the solution
D. increasing the concentration of the acid in the solution
Q.10
Which of the following would lower the pH a solution?
A. increasing the concentration of the base in the solution
B. increasing the strength of the base in the solution
C. decreasing the strength of the acid in the solution
D. increasing the concentration of the acid in the solution
what is the mass of 0.257 mol of calcium nitrate?
Answer: 42.14 g
Explanation: calcium nitrate - [tex]Ca(NO_{3} )_{2}[/tex]
, the molar mass of calcium nitrate = 164 g
formula used = [tex]given mass/molar mass[/tex]= no of molesmass required =[tex]0.257*164[/tex]
=[tex]42.14[/tex] g
can i get help with this question please
D. Scrubbing
Explanation:In this process, the emissions pass through a scrubber, which uses a chemical reagent to bind to and remove the pollutants from the exhaust gases. This reduces the amount of sulfur dioxide present in the exhaust gases before they are released into the atmosphere.
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