Carbonic acid and also the boric acid act as blood buffers. HCO₃ ratios in blood cell plasma are 0.024 and 0.002, resp. Plasma has a pH of 7.4, HCl weighs 0.3 grammes, and NaOH weighs 0.14 grammes.
Where is carbonic acid located?Blood as in human contains carbonic acid. It is created in the woman's skin when water and carbon dioxide dissolve. Additionally, it may be found in erythrocytes, sulphur layers, salts, caverns, calcite, fermentation, coal, freshwater, meteorites, volcanoes, amino acids, and proteins.
From the given information;
pKa1 for H₂CO₃(carbonic acid) at body temperature is 6.1
HCO3 in normal blood plasma equals 0.024 M
H₂CO₃ in normal blood plasma is 0.0012 M
Bicarbonate ions and hydronium ions are created when carbonic acid dissociates in water.
[tex]\mathrm{H}_2 \mathrm{CO}_{3(\mathrm{aq})}+\mathrm{H}_2 \mathrm{O} \rightarrow \mathrm{H}_2 \mathrm{CO}_3^{-}(\mathrm{aq})+\mathrm{H}_3 \mathrm{O}_{(\mathrm{aq})}^{+}[/tex]
By applying Henderson equation;
[tex]\begin{aligned}& \mathrm{pH}=\mathrm{pKa}_1+\log \frac{\left[\mathrm{HCO}_3^{-}\right]}{\left[\mathrm{H}_2 \mathrm{CO}_3\right]} \\& \mathrm{pH}=6.1+\log \frac{[0.024]}{[0.0012]} \\& \mathrm{pH}=6.1+1.30 \\& \mathrm{pH} \text { of blood plasma }=7.4\end{aligned}[/tex]
B). Assuming that (x) is the number of HCl that also was added based on the question, the salt interacts once more to form carbonic acid.
Using the Henderson-Hasselbalch equation as a guide:
[tex]\begin{aligned}& \mathrm{pH}=\mathrm{pK} \mathbf{a}_1+\log \frac{[\text { salt }]}{[\text { acid }]} \\& 7=6.1+\log \frac{[0.024 \times 5-\mathrm{x}]}{[0.0012 \times 5+\mathrm{x}]} \\& 0.9=\log \frac{[0.024 \times 5-\mathrm{x}]}{[0.0012 \times 5+\mathrm{x}]}\end{aligned}[/tex]
Using logarithm rules;
[tex]\begin{aligned}& 10^{0.9}=\frac{[0.024 \times 5-x]}{[0.0012 \times 5+x]} \\& 7.94=\frac{[0.024 \times 5-x]}{[0.0012 \times 5+x]} \\& 7.94=\frac{[0.12-x]}{[0.006+x]}\end{aligned}[/tex]
(0.12 - x) = 7.94(0.006 + x)
0.12 - x = 0.04764 + 7.94x
0.12 - 0.04764 = 7.94x +x
0.07236 = 8.94x
x = 0.07236/8.94
x = 0.008 moles
Recall that:
number of moles = mass/molar mass
molar mass of HCl is equal to the amount of moles of HCl.
mass of HCl = 0.008 moles × 36.5 g/mol
mass of HCl = 0.3 grams
C). Used this 5.0 L of body that a typical adult human possesses in part B, it is possible to estimate the number of milligrams of the buffer component as follows:
[tex]\begin{aligned}& \mathrm{n}_{\mathrm{HClO}_3^{-}}=5 \mathrm{~L}(0.024 \mathrm{~mol} / \mathrm{L}) \\& \mathrm{n}_{\mathrm{HClO}_3^{-}}=0.12 \mathrm{~mol} \\& \mathrm{n}_{\mathrm{H}_2 \mathrm{CO}_3}=5 \mathrm{~L}(0.0012 \mathrm{~mol} / \mathrm{L}) \\& \mathrm{n}_{\mathrm{H}_2 \mathrm{CO}_3}=0.0060 \mathrm{~mol}\end{aligned}[/tex]
Suppose, (x) moles of NaOH could be neutralized by H₂CO₃;
Then, at equilibrium:
[tex]\begin{aligned}\mathrm{n}_{\mathrm{HClO}_3^{-}} & =0.12+\mathrm{x} \\\mathrm{n}_{\mathrm{H}_2 \mathrm{CO}_3} & =0.0060-\mathrm{x}\end{aligned}[/tex]
By the application of the Henderson-Hasselbalch equation:
[tex]\begin{aligned}& \mathrm{pH}=\mathrm{pKa}_1+\log \frac{\left[\mathrm{HCO}_3^{-}\right]}{\left[\mathrm{H}_2 \mathrm{CO}_3\right]} \\& 7.4=6.1+\log \frac{0.12+\mathrm{x}}{0.0060-\mathrm{x}}\end{aligned}[/tex]
Making (x) the subject of the form
[tex]\begin{aligned}& 1.3=\log \frac{0.12+x}{0.0060-x} \\& x=0.0035 \text { moles }\end{aligned}[/tex]
Recall that:
number of moles = mass/molar mass
For NaOH,
mass = number of moles of NaOH × molar mass
mass of NaOH = (0.0035 moles × 40 g/mol )
mass of NaOH = 0.14 g
Thus, we may deduce that the blood plasma's pH is 7.4, its HCl content is 0.3 grammes, and its NaOH content is 0.14 grammes.
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Consider the following reaction:
2Ca(s)+O2(g) → 2CaO(s)
ΔH∘rxn= -1269.8 kJ; ΔS∘rxn= -364.6 J/K
Assume that all reactants and products are in their standard states.
A. Calculate the free energy change for the reaction at 35 ∘C.
Express your answer using four significant figures.
B. Is the reaction spontaneous?
The free energy change for the reaction at 35 ∘C is -1157.45 KJ
Gibbs free energy also termed as the Gibbs energy as well as free enthalpy, or Gibbs function is a quantity which is also used to measure the maximum amount of work done in thermodynamic system when the pressure and temperature are kept constant.
Formula of Gibb's free energy is as follows:
ΔG = ΔH -TΔS
ΔH =1269.8 kJ
ΔS= -364.6 J/K
T = 35ºC = 308.15
ΔS = x 0.001 = 0.3646
ΔG = 1269.8 kJ -(308.15x-0.3646)
ΔG = -1157.45 kJ
Therefore, it is a spontaneous process.
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Explain what is wrong with each of these statements
An aluminium ion looses two electron to form a negative ion.
The formula of carbonate is Co₃⁻².
What is ion ?The term ion is define as any atom or group of atoms that have one or more positive or negative electrical charges. There are two types ion cation and anion.
One lithium atom is react with two fluorine atom to formed lithium fluoride.
Ionic bonds are stronger than covalent bond.
The charge on the barium ion is +2.
When gas turns into liquid its particle get smaller.
Lithium fluoride is a mixture because it contains more than two element.
In an atom the number of electron is equal to the number of proton.
The complete shell contains eight electrons in it.
In the periodic table, elements in the same group does not have the same electron in their outermost shell.
Thus, An aluminium ion looses two electron to form a negative ion.
The formula of carbonate is Co₃⁻².
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the empirical formula of a chemical substance is ch. the molar mass of a molecule of the substance is 78.11 g/mol. what is the molecular formula of the chemical substance? c2h2 c2h4 c3h4 c6h6
[tex]C_{6} H_{6}[/tex] will be the molecular formula of the given chemical substance. The simplest whole-number ratio of the atoms in a compound is shown by empirical formulae.
the number of each type of atom in a molecule is shown by molecular formulas, and the bonds between the atoms in a molecule are shown by structural formulas.
Empirical Formula Mass = (12.01 + 1.008) u
Empirical Formula Mass = 13.018 u
Molecular formula = (Empirical Formula)ₙ
n = Molecular formula Mass/Empirical Formula Mass
n = 78.11 u/13.02 u
n = 6
Molecular formula = (CH)₆
Molecular formula = C₆H₆
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what is the percentage yield if 125.4 g c3h8 are collected from a reaction that should produce 158.4 g c3h8?
The percentage yield is 79.4%. This means that 79.4% of the expected amount of C3H8 was collected from the reaction.
What is percentage yield?Percentage yield is a measure of the efficiency of a chemical reaction. It is calculated by dividing the actual yield of a product by the theoretical yield, and then multiplying that number by 100. The theoretical yield is the amount of product that would be produced if the reaction went to completion. The actual yield is the amount of product actually obtained in a reaction.
This can be calculated by taking the actual yield of 125.4 g C3H8 and dividing it by the expected yield of 158.4 g C3H8 and multiplying it by 100.
(125.4 g C3H8 ÷ 158.4 g C3H8) × 100 = 79.4%
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(6) There are only two elements named after women. Who are the two women? What are the names and the atomic numbers of the elements named after them? What was each woman's contribution to science?
Curium (Cm) and Rhenium are the two elements with female names (Re).
How were the two elements named after women?After Marie Curie, a pioneering researcher in the realm of radioactivity, the element curium, with atomic number 96, was named. She was the first person to receive two Nobel Prizes, one each in physics and chemistry, and her work on the discovery of radium and polonium contributed to the advancement of X-ray technology and the development of cancer therapies.
Rhenium, an element with the atomic number 75, was given its name in honour of Ida Tacke-Rhenium, a German scientist who made the discovery of the substance alongside her husband in 1925. The element was found and isolated by her, and it has since been widely employed in high-temperature alloys, catalysts, and electronic parts.
What was each women's contribution to science?Both of these women made significant contributions to science, and the naming of these elements pays tribute to them. They were pioneers in a male-dominated industry, and their contributions have had a lasting influence on science and technology.
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What is the largest difference in electronegativity between two atoms that form a covalent bond?
a. o
ob. 0.4
c. 1.7
od. 2.6
Depending on the difference in electronegativity between the participating atoms, covalent bonds can either be polar or nonpolar.
The correct option C
What makes electronegativity important?The electronegativity of an atom describes its propensity to attract protons or electron density in that direction. It regulates the shared electron distribution between a number of atoms in a bond. The stronger the attraction of the electrons in an atom's bonds, the more electronegativity it possesses.
What are electronegative substances?The strength with which an element draws the shared electrons depends on the value of its electronegativity.
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hydrogen chloride gas (hcl) diffuses 1.8 times faster than an unknown gas. determine the molar mass of the unknown gas. show your work or explain your answer, giving specific values used to determine the answer.
According to the provided statement, the mystery gas has a molar mass of 118.1 g/mol.
What is the purpose of hydrogen chloride?Numerous processes and products are refined and made using hydrogen chloride, including scrubbing, pickling, depositing metals, curing leather, and sanitising. Burning various plastics can result in the formation of hydrogen chloride. In the presence of water, it produces hydrochloric acid.
Graham's Rule of Emfluence
According to Graham's law of effusion, a gas's effusion rate is inversely related to the square root of its particle mass. You may write this formula as follows:
[tex]\frac{\text { Rate }_1}{\text { Rate }_2}=\sqrt{\frac{\mathrm{M}_2}{\mathrm{M}_1}}[/tex]
Rate1 is the first gas's effusion rate.
The second gas's effusion rate is represented by Rate2.
The average concentration of gas is M1, The mole ratio of gas is 1 M2. 2.
Gases like hydrogen chloride (HCI) diffuse 1.8 times more quickly than unidentified gases.
The molar volume of halogens (HCI) is known to be 36.46 g/mol.
Unknown gas has a molar mass of =?
In the formula, let's enter the following values:
[tex]\frac{\text { Rate }_{\mathrm{H}_2}}{\text { Rate }_{\text {unknown }}}=\sqrt{\frac{\mathrm{M}_{\text {unknown }}}{\mathrm{M}_{\mathrm{H}_2}}} 1.8=\sqrt{\frac{\mathrm{M}_{\text {unknown }}}{36.46}}(1.8)^2=\frac{\mathrm{M}_{\text {unknown }}}{36.46} \mathrm{M}_{\text {unknown }}=36.46 \times(1.8)^2 \mathrm{M}_{\text {unknown }}=118.1304 \mathbf{M}_{\text {unknown }}=\mathbf{1 1 8 . 1}[/tex]
The unknown gas has a molar mass of 118.1 g/mol.
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What volume of 12.0 M HCl is required to make 75.0 mL of 3.50 M HCl?
a) 21.9 mL
b) 0.560 mL
c) 257 mL
d) 75.0 mL
To make 75.0 mL volume of 3.50 M molarity HCl, 21.9 mL of 12.0 M HCl are needed.
What is molarity?A chemical species' concentration in a solution, specifically the amount of a solute per unit volume of solution, is measured by its molar concentration. The number of moles per liter, denoted by the unit symbol mol/L or mol/dm3 in SI units, is the most widely used unit for molarity in chemistry. The number of moles of a solute per liter of a solution is known as molarity. The molar concentration of a solution is another name for molarity. The total number of moles of solute in a given solution's molarity is expressed as moles of solute per liter of solution.
Here,
M1V1=M2V2
12V=75*3.5
V=75*3.5/12
V=21.875 mL
The volume of 12.0 M molarity HCl is required to make 75.0 mL of 3.50 M HCl is 21.9 mL.
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what volume, in ml, of 2.00 m hydrobromic acid is required to react completely with 0.10 mol of solid magnesium hydrox
In order for 0.10 mol of crystalline magnesium hydroxide to completely react, 100 mL volume, in milliliter, of 2.00 mol hydrobromic acidity is needed.
What purpose does magnesium hydroxide serve?Magnesium hydroxide is just a short-term medication for adults and children who experience sporadic constipation. Saline laxatives are a group of drugs that include magnesium.
The effects of magnesium hydroxide on the body are what?Magnesium hydroxide increases gastrointestinal water and lowers stomach acid, which may promote bowel movements. A reliever used to address sporadic nausea is potassium hydroxide. Additionally employed as a neutral to relieve stomach pain, vomiting, and discomfort is potassium hydroxide.
2.00 mol H × = 100 mL
= 1.00 L
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what determines the average kinetic energy of the molecules of any gas? group of answer choices molar mass temperature pressure container volume
The kinetic energy of a gas's particles is inversely related to its temperature. As the gas warms, the particles must travel more quickly because their mass is constant.
Describe kinetic energy.A particle or an item that is in motion has a sort of energy called kinetic energy. An item accumulates kinetic energy when work, which involves the transferring of energy, is accomplished on it by exerting a net force.
How do you calculate kinetic energy?The relationship between kinetic energy and an object's mass and square of all its velocity is direct: K.E. = half m v2. if the mass is measured in kilograms, and the speed is measured in meters per second.
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Calculate the equilibrium constant for each of the reactions at 25 ∘C.
A) MnO2(s)+4H+(aq)+Cu(s)→Mn2+(aq)+2H2O(l)+Cu2+(aq)
Standard Electrode Potentials at 25 ∘C
Reduction Half-Reaction E∘(V)
Pb2+(aq)+2e− →Pb(s) -0.13
Mg2+(aq)+2e− →Mg(s) -2.37
Br2(l)+2e− →2Br−(aq) 1.09
Cl2(g)+2e− →2Cl−(aq) 1.36
MnO2(s)+4H+(aq)+2e− →Mn2+(aq)+2H2O(l) 1.21
Cu2+(aq)+2e− →Cu(s) 0.16
the equilibrium constant (Kc) for the reaction at 25 ∘C is e^(-5764.68/(8.314*298.15))
The equilibrium constant (Kc) for a reaction can be calculated using the standard Gibbs free energy of the reaction (ΔG°) at a given temperature. The Gibbs free energy for a reaction can be calculated using the standard electrode potentials (Eo) of the reduction
half-reactions involved in the reaction as: ΔG° = -nFΔE°
For the reaction : MnO2(s) + 4H+(aq) + Cu(s) → Mn2+(aq) + 2H2O(l) + Cu2+(aq)
The standard electrode potentials for the reduction half-reactions are:
MnO2(s) + 4H+(aq) + 2e- → Mn2+(aq) + 2H2O(l) Eo = 1.21 V
Cu2+(aq) + 2e- → Cu(s) Eo = 0.16 V
The change in standard electrode potential for the reaction is the sum of the electrode potentials for the half-reactions is :
ΔE° = Eo(Mn2+/MnO2) + Eo(Cu/Cu2+) = 1.21 V + 0.16 V = 1.37 VThe standard Gibbs free energy for the reaction is
ΔG° = -nFΔE° = -4 * 96485 * 1.37 = -5764.68 J/mol
The equilibrium constant (Kc) for the reaction at 25 ∘C can be calculated using Kc = e^(-ΔG°/RT) where R is the gas constant (8.314 J/mol·K) and T is the temperature in Kelvin (298.15 K).So the equilibrium constant (Kc) for the reaction at 25 ∘C is e^(-5764.68/(8.314*298.15))
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Carbonic acid (H₂CO3) forms when carbon dioxide (CO₂) dissolves in water
according to this equation:
CO2 + H2O --> H₂CO3
How many moles of CO2 must dissolve in excess water to produce 7 moles of
H₂CO3?
-8 + 3u = 3u - 8
no solution
one solution
infinitely many solutions
Answer: infinitely many solutions
Explanation: since this equation is the same on both sides, any value that is plugged in for "u" will equal the same amount on both sides.
example) -8 + 3(1) = 3(1) - 8
-8 +3 = 3 + -8
-5 = -5
Which element can combine to form ionic bonds?
a. H and CIa
b. H and N
c. S and Sr
d. Xe and F​
Among the given elements, S and Sr forms ionic compound. Sr metal donate electron to sulfur forming ionic compound.
What are ionic compounds?Ionic compounds are formed between metals and non metals. The metals are electropositive elements. They easily loss electrons in chemical bonding.
Strontium is an alkaline earth metal with two valence electrons. Strontium forms ionic compounds with non-metals by donating its two valence electrons.
Sulfur needs two more electrons to achieve octet. Hence, it easily gain two electrons from strontium metal forming the ionic compound SrS.
Hence, option c is correct.
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About how many calories are in one serving (14-17 grams) of alcohol?
A. 50
B. 100
C. 170
D. 200
According to the claim, one serving of alcohol (14–17 grams) has around 100 calories.
What do calories mean?Energy is measured in calories. Calories in nutrition relate to the energy that humans obtain from the food and liquids they consume as well as the energy they expend when engaging in physical activity. On every food package, the nutritional information includes a list of calories. Many diet plans for losing weight include cutting calories.
What do food calories mean?Calories are the units of energy used by your body during food digestion and absorption. A meal might provide your body extra energy if it has more calories. Your body stores excess calories from body fat when it eat more than you need.
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1. Shippers package in order to (fill in the blank) the material. 2. Driver placard their vehicle to (fill in the blank) the risk. 3. What three things do you need to know to decide which placards (if any) you need
1- Shipper's package in order to protect the material. 2- Drivers placard their vehicles to indicate the risk. 3- To decide which placards (if any) you need, you need to know: The particular hazardous material being transported, The quantity of the hazardous material being transported.
The classification of the hazardous material being transported (UN number)The United Nations (UN) number identifies a specific hazardous material and is used to classify and identify materials for transportation. The UN number is used to determine the appropriate placarding for a vehicle transporting hazardous materials. It should be noted that the UN number, the quantity and the classification are used to determine the proper labeling, packaging, and documentation required for transportation of hazardous materials.
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Two forces of 5 N and 7 N respectively act on an object. d)Draw a diagram to show the maximum and minimum resultant
Answer: The maximum resultant force: 12 N
The minimum resultant force: 2 N
Explanation: A force is actually a vector. And if there is no angle among these two forces (or let's say "vectors"), this is the maximum situation (not a general rule, but it is valid for this question because both vectors are positive) and we add these forces up for the solution. So, the magnitude of this resultant force would be 12 N.
Drawing one force vector which has 12 N magnitude and acts on the object would be enough for the solution.
However, the angle among them should be 180 degrees so that the minimum situation exists. So, we are actually subtracting these two forces instead of adding them here.
This means that drawing one force vector which has 2 N magnitude would be enough for the other solution.
Which of the following best describes why many interest groups form political action committees?
Political action committees that promote candidates for public office are created by numerous interest groups.
A community within a larger organisation that shares the objective of developing a certain area of learning, expertise, or technology is known as a special interest group. Members may communicate, physically meet, and organise conferences as they collaborate to influence or create solutions in their specialised fields. Three basic functions are provided by interest groups: member assistance, policy creation, and advocacy. Political parties focus on a broader variety of issues and work to win elections; interest groups, in contrast, have a more focused agenda and don't participate in politics. Political action committees that promote candidates for public office are created by numerous interest groups.
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Which pair of elements has atoms with the same number of valence electrons?
Option C: silicon (Si) and germanium (Ge) is he pair of elements that has atoms with the same number of valance electrons.
Atoms that belong to the same periodic table group will share the same number of valence electrons. Therefore, the valence electrons of Cl, and I of group 17, Na, and Ca of group 1, and C, Si, and Ge of group 14 are the same. The outermost level contains valence electrons, which are crucial in chemical bonding. Thus, option C is the right choice.
The number of valence electrons shared by elements in the same column or group of the periodic table is called the valence electron number. For instance, group 1's alkali metals all have a single valence electron. This indicates that sodium and lithium both have the same number of valence electrons. In the study of chemistry, valence, often known as valency, is the characteristic of an element that determines how many other atoms it may combine with.
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Complete question is:
Which pair of elements has atoms with the same number of valence electrons ?
a. indium (In) and lead (Pb)
b. potassium (K) and bromine (Br)
c. silicon (Si) and germanium (Ge)
d. astatine (At) and radon (Rn)
In a blast furnace, Iron (III) oxide reacts with coke (carbon) to produce molten iron and carbon monoxide. Fe2O3 + 3C = 2Fe + 3CO. How many kg of iron would be formed from 125 kg of Fe2O3?
The total 178571.42 kg of iron would be formed from 125 kg of Fe2O3 in the blast furnace.
The blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals, generally pig iron, but also others such as lead or copper. Blast refers to the combustion air being forced or supplied above atmospheric pressure. It is a block that smelts ores, raw metals and metal armor and tools twice as quickly as a furnace but cannot smelt anything else. In a blast furnace, Iron (III) oxide reacts with carbon to produce molten iron and carbon monoxide.
Fe2O3 + 3C ----> 2Fe + 3CO
Fe2O3 is unstable because the above reaction is thermodynamically favored.
1 mole Fe2O3 = 2×56+3×16 = 160g
2 mole Fe = 112g = 0.112kg
From 125 kg of Fe2O3,
= 160 × 125 /0.112
= 178571.42 kg of Iron formed.
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10 moles of hydrogen are allowed to react with 6 moles of oxygen. How much water will be obtained from reaction on complete consumption of one gas
5 moles of water will be obtained from the reaction on complete consumption of one gas.
The balanced equation for the reaction between hydrogen and oxygen to form water is:
2H2 + O2 -> 2H2O
From the given information, we know that 10 moles of hydrogen are allowed to react with 6 moles of oxygen.
In order to determine the amount of water that will be formed, we can use the stoichiometry of the reaction to calculate the number of moles of water that will be produced.
Since the coefficients in the balanced equation are the same for hydrogen and oxygen, we can use the number of moles of either gas to calculate the number of moles of water that will be formed.
In this case, we have 10 moles of hydrogen and 6 moles of oxygen.
From the balanced equation, 2 moles of H2 react with 1 mole of O2 to form 2 moles of H2O. So, 10 moles of H2 / 2 moles H2 per mole H2O = 5 moles of H2O will be formed.
So, 5 moles of water will be obtained from the reaction on complete consumption of one gas.
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How much energy is needed to break the necessary bonds in the formation of two moles of water based on the following balanced equation?
2H2 + O2—-> 2H2O
882 kJ/mol of energy will be needed to break the necessary bonds in the formation of two moles of water.
What is energy?Energy is described as the quantitative property that is transferred to a body or to a physical system, recognizable in the performance of work and in the form of heat and light.
The bond energy of H-H is 436 kJ/mol
The bond energy of O=O is 495 kJ/mol
The bond energy of H-O is 463 kJ/mol
In order to calculate the total energy needed to break the bonds in the reactants, we add up the bond energy of each bond broken.
For 2 moles of H2 we need 22436 = 1744 kJ/mol
For O2 we need 2*495 = 990 kJ/mol
In total, we need 1744 kJ/mol + 990 kJ/mol = 2734 kJ/mol
we will then add up the bond energy of each bond formed.
For 2 moles of H2O we need 22463 = 1852 kJ/mol
Therefore, the energy needed to break the necessary bonds in the formation of two moles of water is 2734 kJ/mol - 1852 kJ/mol =
882 kJ/mol
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what are multivalent elements and polyatomic ions?
Multivalent elements are metals that can form more than one stable ion charge. Polyatomic ions are ions that consist of more than one atom.
What are polyatomic ions?The primary distinction between a multivalent element and a polyatomic ion is that multivalent elements have several valencies, whereas polyatomic ions contain multiple atoms that are covalently bound to each other. The prefix "multi-" means "many".
The normal ion has only one element, chlorine. The polyatomic ion contains two elements: chlorine and oxygen.
Therefore, metals that can create more than one stable ion charge are known as multivalent elements. Polyatomic ions are ions with more than one atom.
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Find pH in the following solution if their [H^+] concentration is : a) [5x10^-9 ml/dm^3]
Answer:
pH= 8.30
Explanation:
The pH of the solution with a [H+] concentration of 5x10-9 ml/dm^3 is 8.30. This can be calculated using the pH to H⁺ formula: pH=−log([H+]). Substituting the given [H+] concentration, we get: pH = −log(5x10-9) = 8.30.
write the common and systematic (IUPAC) names of the ether that has the following structure
CH3---O---CH2CH3
Common name: ____
Systematic name: ____
An ether is methoxybutane. Alkoxy alkanes are the term for ethers. The alkoxy group includes the lower alkyl group. There are two alkyl groups in methylbutane. methyl
Is polar ch3coch2ch3?The C-H bonds in CH3CH2CH3 have a relatively modest dipole moment and weak dipole-dipole forces because hydrogen and carbon have very similar electronegativities.
In water, CH3NH3Cl + HCl will entirely dissociate to form 2 mol L-1 ions. Or less 1 mol L-1 of ions will only be partially produced by CH3NH2's reaction with water. written last: CH3NH2.
What is CH3CH2NH2's conjugate base?Sequence of acidity: CH3SH > (CH3)2PH > HCl (strongest acid) (weakest acid). In contrast to the conjugate acid of the amide, the nucleophile of CH3CH2NH2 (ethylamine) does indeed have a single resonance contributor.
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The surface of the sun has a temperature of about 5800K and consists largely of hydrogen atoms.
Find the rms speed of a hydrogen atom at this temperature.
The surface of the sun has a temperature of about 5800K and consists largely of hydrogen atoms. The rms speed of a hydrogen atom at this temperature is 11991 m/s
Given that :
Temperature = 5800 K
The rms speed expression is given as :
Vrms = √3KT / m
mass , m = 1.67 × 10⁻²⁷
The rms speed is given as :
Vrms = √ 3 × 1.38 × 10⁻²³ × 5800 / 1.67 × 10⁻²⁷
Vrms = 11991 m/s
Thus, the rms speed at temperature of the 5800 K and it consist the largely of the hydrogen atom is 11991 m/s.
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A nonvesicular rock is made entirely of green 2-millimeter-diameter crystals that have a hardness of 6.5 and show fracture, but not cleavage. The rock is most likely
answer choices
Peridotite
Dunite
Scoria
Granite
Peridotite is the most likely answer.
What is peridotite?Peridotite is a type of igneous rock composed primarily of the minerals olivine and pyroxene. It is the most common rock in the upper mantle of the Earth, and is usually found in regions known as subduction zones where tectonic plates are colliding. Peridotite is formed from the partial melting of mantle rocks, and contains high amounts of magnesium and iron. This type of rock is often mined for gemstones, as well as for its use in construction and jewelry-making.
Peridotite is a type of ultramafic rock made of olivine, pyroxene, and amphibole minerals. It is composed mostly of minerals with a hardness of 6.5 and has a greenish hue, making it consistent with the description given. Furthermore, peridotite is known to fracture, but not cleave, making it the most likely answer given the characteristics of the rock.
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How many formula units of sodium acetate are in 0.87 moles of sodium acetate
Answer:
0.87 moles of sodium acetate is equal to 5.22 formula units of sodium acetate. This is calculated by multiplying the number of moles (0.87) by the number of formula units (6) per mole
Explanation:
what is the effect on the concentrations of no2-, hno2, and oh- when hno2 is added to a solution of kno2 in water.
When HNO2 is added, concentration of HNO2 rises and the equilibrium is shifted to the left, where it favours NO2 ions and depletes OH ions.
What is the most accurate way to define equilibrium?It is a static or dynamic state of equilibrium between two opposing forces or actions. The extent of a reaction, or the level of the vanishing of the reactants, can be predicted using the equilibrium constant (Kc). A general sense of the relative amounts of the reactants and products can be obtained from the equilibrium constant's magnitude.
The equilibrium's equation is:
NO2- (aq.) + H2O (l) ⇌ HNO2 (aq.) + OH− (aq.)
Le Chatelier's Principle will be applied to ascertain how the addition of the specified chemicals would affect the equilibrium mixture.
The equilibrium is shifted to the left by the addition of HNO2, which raises the concentration of HNO2.
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On periodic tables, does the atomic number go on top of the symbol or does the mass number go on top?
Answer: yes the atomic number goes on top of the symbol or does the mass number go on top
Explanation: yes the atomic number goes on top of the symbol or does the mass number go on top
