[ OH−] of a solution that is 0.300 M in HCO3− is 3.24×10^-8 Molarity. and the oh of the solution is 7 .49
Part A: We know that HCO3- is a weak base, so it can be converted to H2CO3 (carbonic acid) through the following equilibrium:
HCO3- + H2O <=> H2CO3 + OH-
The Ka1 for H2CO3 is 4.3×10^-7, so we can use the following expression to find the [OH-]:
[H2CO3][OH-] = Ka1 * [HCO3-]
[OH-] = Ka1 * [HCO3-] / [H2CO3]
Since [H2CO3] is equal to [HCO3-], we can simplify this to: [OH-] = Ka1 * [HCO3-]^2
[OH-] = (4.3×10^-7) * (0.300)^2[OH-] = Ka1 * [HCO3-]^2 [OH-] = (4.3×10^-7) * (0.300)^2
[OH-] = 3.24×10^-8 M. So the [OH-] of the solution is 3.24×10^-8 Molarity.
Part B: To find the pH of the solution, we need to find the negative log of the [OH-].
pH = -log([OH-])
pH = -log(3.24×10^-8)
pH = 7.49
So the pH of the solution is 7.49.
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can bond polarity and electronegativity of the nonhydrogen atom explain the trend in acid strength shown in model 3? use complete sentences to explain why or why not.
Yes, higher the polarity and electronegativity of the nonhydrogen atom explain the trend in acid strength shown in model 3. It shows more attraction towards the H⁺ ions and lesser is the acidity.
Why is electronegativity significant? What is it?An atom's propensity to draw electrons (or electron density) in its direction is measured by its electronegativity. It controls how the shared electrons between the two atoms in a bond are distributed. The greater an atom's electronegativity, the more strongly the electrons in its bonds are drawn to it.
The capacity of an atom in a covalent bond to draw shared electrons is known as electronegativity. The degree to which an element draws in the shared electrons is influenced by the level of its electronegativity.
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Arrange the steps of glycogen degradation in their proper order. Hormonal signals trigger glycogen breakdown. --------------------------------------------------------------Glucose 6-phosphate undergoes further metabolic processing.Which enzymes are required for glycogen degradation? O phosphoglucomutase O transferase O glycogen phosphorylase O phosphoglycerate mutase O a-1,6-glucosidase
Glycogen → G6P → enetr glycolysis. In Liver: glycogen → G6P → G → released into blood. G1P from glycogen by phosphorylase, G6P from G1P, catalyzed by phosphoglucomutase, and then glycosidase.
What is glycogen?Our cells primarily use glucose as fuel. The liver and muscles store the glucose when the body doesn't need to use it for energy. Glycogen is the name given to this form of glucose that is stored and is composed of several linked glucose molecules.
What is glycogen's primary purpose?Your body primarily uses the glycogen reserve in your liver to support blood glucose (sugar) level regulation. With the help of the hormones glucagon and insulin, your body typically carefully controls your blood glucose levels. Your pancreas releases more glucagon when you have hypoglycemia, a condition where your blood sugar levels are too low.
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list (7) seven importance of chemistry in our everyday life
Answer:
meeting our basic needs of food, clothing, shelter, health, energy, and clean air, water, and soil.
Explanation:
hope this helps
calculate the molar mass of tetraphosphorus decaoxide, p4o10, a corrosive substance which can be used as a drying agent.
As a result, the molecular mass of P₄O₁₀, or tetraphosphorus decaoxide, is 284 g/mol.
What is molecular mass?The molecular mass is the mass of all the atoms present in the molecule. The molecular mass of the compound is calculated using the steps:
Determine the atomic number of each element in the compound.
Each element's atomic mass is multiplied by the number of atoms in that element in the compound.
The mass of all the atoms are added up.
Here,
The given compound is:
P₄O₁₀
The atomic mass of P=31 u
The atomic mass of O=16 u
The molecular mass of P₄O₁₀,
=31*4+16*10
=124+160
=284 g/mol
Hence, the molecular mass of P₄O₁₀ that is tetra phosphorus decaoxide is 284 g/mol .
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Maddie and Juan's were given to task of trying to cook a s'more using the Sun! They built this oven using a box and aluminum foil. After setting up the device, they put four s'mores in the box. Ten minutes later the s'mores were hot and ready to eat. Describe the energy transformation that took place in the students' oven
The conversion that take place is solar energy to heat energy.
The energy conversion that occurred in the classroom oven was from solar energy to heat energy. Radiant energy, also known as solar energy, is the heat from the sun that heats the oven. The hotdog becomes hot and ready to eat when the internal temperature of the oven rises with the help of aluminium foil because the absorbing heat energy accumulates inside the oven more quickly than it is lost. Light energy to heat energy conversion: Solar cookers aim sunlight at a target, like a cooking pan. Conduction is the process by which light energy is transformed into heat by interacting with the receiver material. Utilizing materials that conduct and hold heat improves conversion.
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Complete and balance the following equation: BrO3^-(aq)+N2H4(aq) -> Br2(l)+N2(g) (acidic solution) And identify the oxidizing and reducing agents from the resulting balanced equation. (Identify all of the phases in the answer)
The balanced equation for the reaction in an acidic solution is:
BrO₃ -(aq) + 6 N₂H₄(aq) + 6 H+ (aq) → 3 Br₂(l) + 2 N₂(g) + 6 H₂O(l)
What are oxidizing agents?A chemical compound that facilitates the transfer of oxygen atoms during a redox reaction is referred to as an oxidizing agent, also known as an oxidizer or oxidant. Essentially, it aids in oxidation while reducing by acquiring hydrogen and oxygen or electrons from other reactants.
The oxidizing agent in this reaction is BrO₃ - (bromine trioxide anion), which is reduced to Br₂(bromine) and gains electrons.
The reducing agent in this reaction is N₂H₄ (hydrazine), which is oxidized to N₂(nitrogen gas) and loses electrons.
The phase of reactant and products are in aqueous (aq) and liquid(l) and gas(g) phase.
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when a molecule absorbs ir electromagnetic energy, what are the vibrational modes affected? electron spin ionization proton spin stretching bending
According to the given question the both options c) and d) are correct .If a molecule absorbs Infrared electromagnetic energy, it stretches and bends.
What is electromagnetic energy, for instance?TV and radio waves, radios, infrared rays, photons, exposure to ultraviolet, X-rays, and cosmic rays are all examples of electric waves that propagate across space independently of matter.
A molecule vibrates when it takes in IR electromagnetic energy.
This causes the atoms of the molecule to collide elastically.
Vibration modes
This include the following:
Stretching ,Bending
This is the reason why both C and D have been the most popular choices.
appropriate.
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The Complete question :
when a molecule absorbs ir electromagnetic energy, what are the vibrational modes affected?
a) electron spin ionization
b) proton spin
c) stretching
d) bending
Which of the following greenhouse gases is entirely the result of human activity Mcq? 1. Methane
2. Carbon dioxide
3. Nitrous oxide
4. Chlorofluorocarbons
The greenhouse gases which entirely the result of human activity is Chlorofluorocarbons.
Methane, Carbon dioxide, Nitrous oxide, and Chlorofluorocarbon all are greenhouse gases. But only Chlorofluorocarbon (CFC) is a greenhouse gas which is entirely produced by human activities.
What is Chlorofluorocarbon?Chlorofluorocarbons (CFCs) are nontoxic, nonflammable chemicals consisting atoms of carbon, chlorine, and fluorine. They are used in the production of aerosol sprays, blowing agents for foams and packing materials, as solvents, and as refrigerants.
Research found that Chlorofluorocarbon could deplete Earth's atmospheric ozone layer, that blocks the sun's damaging ultraviolet rays. When the scientists reported their research results in 1974, CFCs were widely used as refrigerant gases and as propellants in aerosol sprays.
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A certain line in the Balmer emission series of this cation has a wavelength of 27.15 nm. Determine the principal quantum number of the original level of the electron. Which line is it
The principal quantum number of the original number is 4 and original level of electron is 2.
The Balmer series refers to to a series of spectral emission lines of the hydrogen atom that occurs when an electron moves from higher energy levels to the energy level of n= 2.
Hence;
λ = 486.3 * 10^-9 m
RH = 1.097 * 10^7 m-1
nf = 2
ni = ?
Using the formula;
1/λ = RH (1/nf^2 - 1/ni^2)
1/486.3 * 10^-9 = 1.097 * 10^7 (1/4 - 1/ni^2)
2.06 * 10^6/1.097 * 10^7 = (1/4 - 1/ni^2)
0.188 = 1/4 - 1/ni^2
1/ni^2 = 1/4 - 0.188
1/ni^2 = 0.25 - 0.188
1/ni^2 = 0.062
ni^2 = 16
ni = 4
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which of the following will affect the total amount of solute that can dissolve in a given amount of solvent? a. the solution is stirred. b. the solute is ground to fine particles before dissolving. c. the temperature changes.
The greatest amount of a solute that may dissolve in a specific amount of solvent is known as a substance's solubility; this quantity depends on the chemical makeup of both the solute and the solvent as well as on
What elements influence the solubility of a Class 6 solute?Temperature and pressure are the two direct variables that impact solubility. Pressure solely influences the solubility of gases, but temperature affects the solubility of both solids and gases.
What are the four determinants of solubility?The four main elements that influence a gas' solubility in a liquid are listed below. Size, chemical reactivity, pressure, and temperature between the liquid and gas. Typically, as the pressure rises, the gas becomes more soluble.
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A substance's solubility is the maximum amount of that substance that may dissolved in a given amount of solvent; this amount relies on the chemical composition of both the solvent and solute as well as on
What factors affect a Class 6 solute's solubility?Temperature and pressure are the two direct variables that impact solubility. Temperature has an impact here on soluble including both solids and gases, but pressure only affects the gas's solubility.
Which of the four elements that determine solubility?The below is a list of the four primary factors that affect a gas' soluble in a liquid. Temperature, pressure, size, and chemical reactivity here between liquid and gas Usually, the gas gets more soluble as the pressure increases.
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which of the following is not a property of an ionic compound? a. hardness b. molten compound conducts electricity c. low boiling point d. brittleness
The following which is not a property of an ionic compound is low boiling point and is therefore denoted as option C.
What is an Ionic compound?This is referred to as a type of chemical compound where the oppositely-charged ions of a metal and a nonmetal are attracted to each other to form an ionic bond.
Ionic compounds usually have high melting and boiling point due to the strong electrostatic forces between the atoms. It is also usually very hard and brittle in nature and the molten compound conducts electricity and heat very well which is therefore why option C was chosen as the correct choice.
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Which best describes a scenario of seafloor destruction?
A) Seafloor is lifted to form mountains.
B) Oceanic plate is driven upward at a boundary.
C) Oceanic plate is driven downward at a boundary.
D) Hot spot consumes vast amounts of old seafloor.
Oceanic plate is driven downward at a boundary. Option C is the right answer.
What is oceanic plate?Oceanic plates are tectonic plates that make up the Earth's ocean floor. They are denser and thinner than continental plates and underlie the world's ocean basins. The movement of oceanic plates is responsible for the creation of mid-ocean ridges and subduction zones, which are key features of plate tectonics.
Tectonic plates are large pieces of Earth's lithosphere that move and interact, causing earthquakes, volcanic eruptions, and the creation of mountains. There are seven major and several minor plates on Earth. The movement and collision of these plates create plate boundaries such as divergent, convergent, and transform.
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Balance the following redox reaction in acidic solution: Cu(s)+NO3−(aq)→Cu2+(aq)+NO2(g) Express your answer as a chemical equation including phases.
The balanced redox reaction in acidic solution is:
Cu(s) + 4H+(aq) + 2NO3-(aq) → Cu2+(aq) + 2NO2(g) + 2H2O(l)
The reaction given is a redox reaction and it needs to be balanced. The reactants and products should have the same number of atoms of each element on both sides of the equation. In the given equation, the number of Copper atoms and Nitrate ions are not balanced on both sides of the equation. In acidic solution, the hydrogen ions (H+) are also present and they also need to be added to the equation. In this case, 4 hydrogen ions and 2 water molecules have been added to the balanced equation to balance the equation.
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at what point in processing do you apply photometric calibration or spectrometric color calibration in pixinsight?
The camera incorporates all of the light which each filters transmits when we measure colour using photometric methods.
What is the purpose of photometry?
In chemistry, photometry is frequently used to study solutions and liquids. Masses of synthetic or natural components in a mixture or liquid can be measured with the aid of photometers. Applying filters to limit some wavelengths while allowing another desired wavelength to pass allows for the use of photometry in astronomy.
What is the photometric principle?
Photometry is the measuring of light absorption in the UV, VIS, and IR wavelength ranges. To calculate the concentration of analyte in a solutions or liquid, utilise this measurement.
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how many grams of aluminum bromide are formed from the reaction of aluminum and hydrogen bromide if you have excess al and 121 g of hbr
The reaction of aluminum and hydrogen bromide will form 212.44 grams of aluminum bromide.
The chemical equation for the reaction between aluminum and hydrogen bromide is:
[tex]2 Al + 3 HBr[/tex] →[tex]Al_2Br_6[/tex]
From this equation, we can see that the reaction is a stoichiometric reaction, which means that the ratio of the reactants and products is fixed and is determined by the coefficients in the balanced equation.
If we have 121 grams of hydrogen bromide, the number of moles of hydrogen bromide can be calculated using the molar mass of hydrogen bromide ([tex]HBr[/tex]) which is approximately 80.9 g/mol. So:
121 g [tex]HBr[/tex] / 80.9 g/mol = 1.49 mol [tex]HBr[/tex]
Since the coefficient of hydrogen bromide in the balanced equation is 3, we know that for every one mole of aluminum, we need 3 moles of HBr. So, in this case, we have excess [tex]Al[/tex], which means the limiting reactant is [tex]HBr[/tex], and we have 1.49 moles of [tex]HBr[/tex].
The number of moles of aluminum bromide ([tex]Al_2Br_6[/tex]) formed can be calculated by dividing the number of moles of [tex]HBr[/tex] by the coefficient of [tex]HBr[/tex] in the balanced equation, which is 3
1.49 moles [tex]HBr[/tex] / 3 = 0.497 moles [tex]Al_2Br_6[/tex]
We can calculate the number of grams of aluminum bromide by multiplying the number of moles by the molar mass of aluminum bromide, which is approximately 427.3 g/mol
0.497 moles [tex]Al_2Br_6[/tex] * 427.3 g/mol = 212.44 g [tex]Al_2Br_6[/tex]
So, the reaction of aluminum and hydrogen bromide will form 212.44 grams of aluminum bromide.
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3 mL has 8 mg in it how many milligrams are in 10 mL
Answer:
there are about 26.67 milligrams in 10 mL.
Explanation:
To find the number of milligrams in 10 mL, you can use the proportion:
(8 mg) / (3 mL) = (x mg) / (10 mL)
Where x is the number of milligrams in 10 mL. To solve for x, you can cross-multiply and divide:
(8 mg) * (10 mL) = (3 mL) * (x mg)
x = (8 mg) * (10 mL) / (3 mL)
x = 26.666.. mg
0.50 moles of gas take up 10.5 L
of space under constant pressure
and temperature conditions.
What volume is required to hold
2.0 moles of the gas?
Answer:
Explanation:as V is proportional to n(mole),you can easily calculate using V1/n1=V2/
The volume required to hold 2 moles of the gas is 42 L
Explanation:
(2.0 x 10.5)/0.50
= 21/0.50
= 42 L
Which metal can be oxidized with an Sn2+ solution but not with a Fe2+ solution?
a. Only Aluminum
b. Only Cadmium
c. Nickel and Cadmium
d. Aluminum and Nickel
This lists the metals magnesium, Iron can be oxidized with an Sn2+ solution but not with an Fe2+ solution.
The correct answer is C -Nickel and cadmium
What types of metal have oxidized?Everyone has seen the red iron oxide (rust) that develops on steel products that haven't been adequately safeguarded. The red rust that forms is typically loose and scaly, and it peels off readily, exposing a greater portion of the underlying material to the atmosphere. Metals like stainless steel, which is steel with nickel and chromium added, oxidize as well, though.
What effects does metal oxidation have?The electrons that the metals loses during the oxidation process can also be a hydrogen bond.
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This diagram of the first right-hand rule relates which two quantities?
A. current (thumb) to magnetic field (fingers)
B. magnetic field (thumb) to current (fingers)
C. current (thumb) to force (fingers)
D. force (thumb) to current (fingers)
The first right-hand rule relates two quantities that are current (thumb) to magnetic field (fingers).
What is first right-hand rule?The right hand rule states that you should point your right thumb in the direction of the velocity (v), your index finger in the direction of the magnetic field (B), and your middle finger will point in the direction of the resulting magnetic force to find the direction of the magnetic force on a positive moving charge.
Rule of the Right Thumb:The direction of the wrapped fingers will indicate the direction of magnetic field lines if a current-carrying conductor is thought to be held in your right hand with the thumb pointing in the direction of the current.
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Which of these compounds will form a precipitate when mixed with an aqueous solution of sodium sulfate (Na2SO4)?
A. LiNO3
B. KNO3
C. Mg(NO3)2
D. Ba(NO3)2
Ba(NO3)2 will form a precipitate when mixed with an aqueous solution of sodium sulfate (Na2SO4)
What is the name for BA NO3 2?Barium Nitrate Crystals, When each of these is combined with sodium sulfate, one of the results is sodium nitrate, and the other is the positive/metal ion with sulfate. To make a precipitate (solid/insoluble), we need to look for the positive ion that goes with sulfate. The Solubility Rules may be found on page 6 of the Reference Tables.
Calcium sulfate, strontium sulfate, barium sulfate, mercury sulfate, lead (II) sulfate, and silver sulfate are the only insoluble sulfates. Because its positive ion is barium, the answer must be , Barium nitrate is the inorganic compound with the chemical formula Ba(NO3)2. It, like most barium salts, is colorless, toxic, and water-soluble.
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50 Points
What mass of H2O is produced by the combustion of 2.00 mol of CH4?
50 Points And will award brainiest if correct
CH4 + 2O2 → CO2 + 2H2O
36.01 g
42.63 g
18.02 g
6.00 g
Answer:The moles of carbon dioxide produced from 100 g methane is 6 moles.
Explanation: Balanced Equation. CH4+2O2 → CO2+2H2O.
The combustion of 2.00 mol of [tex]CH_4[/tex] produces approximately 72.08 grams of [tex]H_2O.[/tex] All the options given are incorrect.
Combustion is a chemical reaction that occurs between a fuel and an oxidizing agent basically in presence of oxygen, typically producing heat and light.
To determine the mass of [tex]H_2O[/tex] produced by the combustion of 2.00 mol of [tex]CH_4[/tex], we need to use the stoichiometric ratio between [tex]CH_4[/tex]and [tex]H_2O[/tex] in the balanced chemical equation.
From the balanced equation: [tex]CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O[/tex]
We can see that for every 1 mole of [tex]CH_4[/tex], 2 moles of [tex]H_2O[/tex]are produced. We can see that for every 1 mole of [tex]CH_4[/tex], 2 moles of [tex]H_2O[/tex]are produced.
Given that we have 2.00 mol of [tex]CH_4[/tex], we can calculate the moles of [tex]H_2O[/tex]produced:
2.00 mol [tex]CH_4[/tex] × (2 mol [tex]H_2O[/tex]/ 1 mol [tex]CH_4[/tex]) = 4.00 mol [tex]H_2O[/tex]
Now, we can calculate the mass of [tex]H_2O[/tex]produced using the molar mass of water ([tex]H_2O[/tex]), which is approximately 18.02 g/mol:
Mass of [tex]H_2O[/tex] = Number of moles of [tex]H_2O[/tex]× Molar mass of [tex]H_2O[/tex]
Mass of [tex]H_2O[/tex] = 4.00 mol × 18.02 g/mol = 72.08 g
Therefore, the mass of [tex]H_2O[/tex] produced by the combustion of 2.00 mol of [tex]CH_4[/tex] is approximately 72.08 grams.
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What reagent (or compound) causes the observed visual change in a positive Lucas test? A. Cr(VI) is reduced to Cr(ll) B. The alkyl halide product is insoluble in water C. The product hydrazone is insoluble. D. Ag() is reduced to Ag(0)
Hydrogen bonds cannot be broken by the energy released during the dissolution of solid alkyl halides with water. Because of their inability to dissolve the hydrogen atoms between water molecules, alkyl halides cannot withstand their attraction to one another. Insoluble in water, it continues to be.
Is hydrogen produced by any plants?In the process of photosynthesis, plants split water into nitrogen and oxygen with the help of sunlight, and then mix the generated hydrogen with atmospheric carbon dioxide to produce carbohydrates.
Do bodies benefit from hydrogen?Many of the factors implicated in the pathophysiology and etiology of the metabolic syndrome and the diseases it is associated with have been linked to molecular hydrogen's ability to attenuate peroxidation, enhance cellular function, and decrease chronic inflammation5.
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What is the molar mass of magnesium nitrate? Round to the nearest 0.01, and include correct units AND substance formula.
148.3 g/mol
148.3 mol
148.3 g
were wrong I think
Does any solid Cu(OH)2 form when 0.075 g of KOH is dissolved in 1.0 L of 1.0 X 10-3 M Cu(NO3)2?
Yes, precipitation of Cu(OH)₂ solid will form when 0.075 g of KOH is dissolved in 1.0 L of 1.0 X 10⁻³ M Cu(NO₃)₂.
What exactly are products and reactants?Chemical reactions begin with reactants, and the products of a reaction are the substances that were produced. The common chemical formula can be used to represent a chemical reaction: Reaction products. During chemical reactions, bonds shatter and reform. Also, the opposite outcome of the reaction happens.
[OH⁻]₀ = 0.075g/56.105g/mol(1.01) = 1.34×10⁻³
Cu(OH)₂ (s) ⇄ Cu²⁺ (aq) + 2OH⁻(aq)
? 0.0010 1.34×10⁻³
Q = [Cu²⁺][OH⁻]² = 0.0010 ×(1.34×10⁻³)² = 1.8×10⁻⁹ > Ksp 2.2×10⁻²⁰
This means equilibrium will shift to the left, i.e., to reactants in which in turn implies that solid Cu(OH)₂ will form.
moles Cu²⁺= 1.L x 1 x 10⁻³ M= 10⁻³
moles KOH = 0.075 g/ 56.107 g/mol=0.00133
[Cu²⁺]= 10⁻³ / 1. L= 10⁻³ M
[OH⁻]=0.00133 / 1.L= 0.00133 M
Qsp= 10⁻³ (0.00133)² =1.786 x 10⁻⁹ >> Ksp ( = 2.2 x 10⁻²⁰)
precipitation should occur.
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an ionic compound forms when calcium reacts with iodine . if a sample of the compound contains calcium ions, how many iodide ions does it contain? round your answer to significant digits.
If a sample of the compound contains calcium ions, then iodide ions that it contains is 14.8 x 10^21.
What are the ionic compounds?Ionic compounds are those that have ionic bonding between elements with significant differences in their electronegativity.
The stronger the attraction between the cation and anion, the bigger the difference. Due to strength and the amount of energy required to break them, they have high melting and boiling points.
These substances crystallize into brittle, easily breakable tiny bits. Generally speaking, electrovalent substances dissolve in water but are insoluble in solvents like oil, gasoline, kerosene, etc.
Given 7.4 x 10^21 calcium ions.
Hence, the number of iodide ions is 2 * 7.4 x 10^21 = 14.8 x 10^21.
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Note: The question given on the portal is not complete. Here is the complete question.
Question: An ionic compound forms when calcium reacts with iodine. If a sample of the compound contains 7.4 x 10^21 calcium ions, how many iodide ions does it contain
naming ionic compounds what are the structural units that make up ionic compounds and how are they named?
The naming ionic compounds the structural units that make up ionic compounds are cations as positively charged specie and the anions , negatively charged species.
The the structural units that make up ionic compounds are cations as positively charged specie and the anions , negatively charged species. There are some rules given below :
1) The name of the cation is by the name of the anion.
2) If cation has fixed charge then the name is same as element.
3) For naming the anion the name of the element is used with the suffix ide.
The some examples are :
CaO = calcium oxide
AlN = aluminum nitride
Fe²⁺ = ferrous
Fe³⁺ = ferric
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Salicylic acid (C7H6O3) reacts with acetic anhydride (C4H6O3) to form acetylsalicylic acid (C9H8O4). 2C7H6O3(aq) C4H6O3(aq) Right arrow. 2C9H8O4(aq) H2O(l) What is the limiting reactant if 70.0 g of C7H6O3 and 80.0 g of C4H6O3 react
We have only 0.5 mol of C₇H₆O₃, so we don't have enough amount of salicylic acid, therefore, salicylic acid acts as limiting reactant.
What are reactants that are limiting?In a chemical reaction, the amount of product that can be formed is limited by the limiting reactant, also known as the limiting reagent, which is the reactant that is consumed first.
It is helpful to convert the masses of reactants into moles in order to comprehend what the limiting reactant is. These are the molecular masses:
C₇H₆O₃ = 138g/mol
C₄H₆O₃ = 100g/mol
Making moles out of masses:
70g C₇H₆O₃ 1mol/138g = 0.5 mol C₇H₆O₃
80g C₄H₆O₃ 1mol/100g = 0.8 mol C₄H₆O₃
In the reaction, 2 moles of C₇H₆O₃ are necessary to react with 1 mol of
C₄H₆O₃ Following this ratio:
0.8 mol C₄H₆O₃ . 2 moles of C₇H₆O₃/ 1 mol of C₄H₆O₃ = 1.6mole C₇H₆O₃
We have only 0.5 mol of C₇H₆O₃ i.e, we don't have enough amount of salicylic acid, therefore, this is the limiting reactant.
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how does weathering and erosion turn igneous rock into sediment
Erosion and weathering convert boulders and mountains into sediments, such as sand or mud.This method uses slightly acidic water to gradually wear away stone.
What is erosion ?The term erosion is defined as when small pieces of the Earth's surface are moved from one place to another. Boulders and mountains become sediments, such as sand or mud, as a result of erosion and weathering.
Chemical weathering, or dissolution, is one type of weathering.The starting materials for new, sedimentary rocks are produced by these three processes.
Thus, Erosion and weathering convert boulders and mountains into sediments, such as sand or mud.
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Biannaca Whiteside
Ms. Stephens
Advanced Adult Health
24 February 2022
Case Study 11
J. is a 50-year-old married woman with a genetic autoimmune deficiency; she has had recurrent infective endocarditis. The most recent episodes were a Staphylococcus aureus infection of the mitral valve 16 months ago and a Streptococcus viridans infection of the aortic valve 1 month ago. During the latter hospitalization, an echocardiogram showed moderate aortic stenosis, moderate aortic insufficiency, chronic valvular vegetations, and moderate left atrial enlargement. Two years ago, J. received an 18-month course of total parenteral nutrition (TPN) for malnutrition caused by idiopathic, relentless nausea and vomiting (N/V). She has had coronary artery disease for several years and, 2 years ago had an acute anterior wall myocardial infarction (MI). In addition, she has a history of chronic joint pain. Now, after having been home for only a week, J. has been readmitted to your floor with endocarditis, N/V, and renal failure. Since yesterday, she has been vomiting and retching constantly; she also has had chills, fever, fatigue, joint pain, and headache. As you go through the admission process with her, you note that she wears glasses and has a dental bridge. Intravenous (IV) access is obtained with a double lumen peripherally inserted central catheter (PICC) line. Other orders and your assessment are shown in the box.
Chart View
Admission Orders
STAT blood cultures (aerobic and anaerobic) × 2, 30 minutes apart STAT CMP & CBC Begin PN at 85 mL/hr Piperacillin sodium/tazobactam sodium (Zosyn) 2 g q6h Vancomycin (Vancocin), renal dosing per pharmacy, IVPB q12h Furosemide (Lasix) 80 mg PO daily Amlodipine (Norvasc) 5 mg PO daily Potassium chloride (K-Dur) 40 mEq PO daily Metoprolol (Lopressor) 25 mg PO bid Ondansetron 4 mg IV every 6 hours PRN Transesophageal echocardiogram ASAP
Admission Assessment
Blood pressure 152/48 (supine) and 100/40 (sitting) Pulse rate 116 beats/min
Respiratory rate 22 breaths/min
Temperature 100°F (37°C) Oriented × 3 to person, place and time, but drowsy Grade II/VI holosystolic murmur and a grade III/VI diastolic murmur Lungs clear bilaterally Abdomen soft with slight left upper quadrant tenderness Multiple petechiae on skin of arms, legs, and chest; splinter hemorrhages under the fingernails; hematuria noted in voided urine
1. Which of these statements about IE are true? Select all apply.
a. IE may affect the heart valves. b. IE is an inflammation of the pericardial sac. c. IE is an infection of the innermost layer of the heart. d. Cardiac tamponade is a common complication of IE. e. Heart failure, sepsis, and dysrhythmias may occur with IE
Cardiac tamponade is a common complication of IE, which can affect the heart valves and is an infection of the heart's innermost layer. It is true that heart failure, sepsis, and dysrhythmias can develop with IE.
When blood or fluid accumulates between the heart muscle and the outer covering sac (pericardium), it puts pressure on the heart and causes cardiac tamponade. Cardiac tamponade may happen because of: cutting open an aortic aneurysm (thoracic) terminal lung cancer. chest pain (acute MI). An abnormal or irregular heartbeat is known as a cardiac dysrhythmia (arrhythmia). A dysrhythmia can cause your heart to beat too quickly or too slowly. Another possibility is that your heart's rhythm is disturbed, giving you the impression that a beat has skipped. Your heart may beat excessively rapidly, or too slowly, or with an uneven pattern (tachycardia).
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Identify substituents on product E q11 A. 2 x -CO2H group and 1 x -SO3H group B. no substituent, only H C. 2 x -SO3H group and 1 x -CO2H group D. 2 x -SO3H group E. 2 x - CH2CH3 group and 1 x -SO3H group
Everything is predicated on benzenation, and the replacement location depends on when benzene is in an electron-rich or electron-deficient position.
Who or what is an electron?A opposite charges new particle known as an electron can either be free or attached to an atom (not bound). Each of the three main types of elements within an element is an electrode that is bonded to it; its other pair are protons plus neutrons.
Where can you find electrons?Electrons are present outside the atom's nucleus, in contrast to protons and neutrons which are contained from the inside of the nucleus at its center. Negative electrons are drawn to the positively charged nucleus because the electric charges of opposite polarity attract one another.
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