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?
Answers
Related Questions
What orbitals are used to form each bond in methanol, CH3OH? Be sure to answer all parts. All C-H bonds are formed from C ... sp 3 -H ... sp The C-O is formed from C ... 3sp O ... 3sp The O-H bond is formed from O ... 3sp -H ...sp
Answers
sp³ hybridized orbitals form the CH, CO and OH bonds in methanol.
What is hybridization?Hybridization is the process by which the energy of individual atom orbitals is redistributed to create new orbitals with equivalent energy. The hybrid orbitals are the new orbitals that emerge during this process.
All C-H bonds in methanol are formed from the overlapping of the carbon atom's hybridized sp³ orbital with the hydrogen atoms 1s orbital.
The C-O bond in methanol is formed from the overlapping of the carbon atom's hybridized sp³ orbital with the oxygen atom's hybridized sp³ orbital.
The O-H bond in methanol is formed from the overlapping of the oxygen atom's hybridized sp³orbital with the hydrogen atoms 1s orbital.
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Place the steps in order from beginning to end to show how to determine the percent composition of a compound from its chemical formula.
Answers
Mass percentage is a term that represents the concentration, basically mass by mass percentage. It tells about the percentage of a component in a whole component. Therefore, in the below given ways we can find the percent composition.
What is percentage by mass?Mass percentage represents the the percentage of each element that is making a particular compound. Mass percentage does not have any unit as numerator and denominator contains the same unit.
Mathematically,
Percentage of mass = (component’s mass ÷ total mass) x 100%
Therefore, in the above given ways we can find the percent composition.
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Calculate E∘cell for the balanced redox reaction.
PbO2(s)+4H+(aq)+Sn(s)→Pb2+(aq)+2H2O(l)+Sn2+(aq)
Answers
E°cell for the balanced redox reaction is -0.531 V.A redox reaction can be defined as a chemical reaction in which electrons are transferred between two reactants participating in it.
How is an EO cell calculated?Calculating E° cells given K either K provided Eo cell can both be done using this equation. The following formula can be utilized if the RT is constant and the temperature is 298 K: Find the empirical formula (K) for the reaction using F o (0.025693V/n) and K is -0.34V.
PbO2 (s) + 4 H+ (aq) + Sn (s) --> Pb2+ (aq) + 2 H2O (l) + Sn2+ (aq) AI Recommended
How can E° cell be calculated using common reduction potentials?Using E° cell table, calculate the E° readings using the conventional reduction potentials. Identify E°cell as E°cathode - E°anode in step 4. Step 5: We can use G = -nFE°cell after calculating E° cell and determining the amount of moles of electrons.
To know more about A redox reaction can be defined as a chemical reaction in which electrons are transferred between two reactants participating in it.
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Use the molar solubility 3.27 * 10-11 M in pure water to calculate Ksp for NiS
Answers
This value indicates that NiS is very slightly soluble in water and thus will not readily dissolve in it.
What is soluble?Soluble describes substances that can be dissolved in a liquid. When a substance is soluble, it is able to form a homogenous solution with the liquid, meaning that the substance will spread out evenly throughout the liquid. Common examples of soluble substances include sugar and salt, which can be dissolved in water. Other substances, such as oil, are insoluble and will not dissolve in a liquid.
The Ksp of NiS is equal to the molar solubility of NiS in pure water raised to the power of two. This is because NiS dissociates into two ions in water (Ni2+ and S2-). Therefore, the Ksp of NiS can be calculated as follows:
Ksp = (3.27 x 10-11 M)2 = 1.06 x 10-21
This means that the solubility product constant (Ksp) of NiS is equal to 1.06 x 10-21. This value indicates that NiS is very slightly soluble in water and thus will not readily dissolve in it.
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The level of water in an olympic size swimming pool (50.0 meters long, 25.0 meters wide, and about 2.00 meters deep) needs to be
lowered 1.50 cm. if water is pumped out at a rate of 4.60 liters per second, how long will it take to lower the water level 1.50 cm?
Answers
Olympic size: At a rate of 4.60 liters per second, it would take 543,478.2608 seconds (or about 6.5 days) to remove 2.50 m^3 of water.
What is Olympic?The Olympic Games are a major international multi-sport event featuring both summer and winter sports, held every four years. The modern Olympic Games were first held in Athens, Greece in 1896. The International Olympic Committee (IOC) organizes the Games and oversees the host cities. As the premier global sporting event, the Olympics feature more than 200 nations participating in a wide variety of sports
The volume of an Olympic size swimming pool is 50.0 m x 25.0 m x 2.00 m = 2500 m^3. To lower the water level by 1.50 cm, we need to remove a volume of 2.50 m^3 (1.50 cm/100 cm x 2500 m^3).
At a rate of 4.60 liters per second, it would take 543,478.2608 seconds (or about 6.5 days) to remove 2.50 m^3 of water.
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The enthalpy of FeBr3 (s) is -269 kj/mol and the enthalpy of the reaction 2Fe(s) +3Br2(g) ->2FeBr3 (s) is -631 kj/mol. Calculate the enthalpy of evaporation of Br2 (l) which is liquid at 25C.
Answers
The reaction 2Fe(s) +3Br2(g) ->2FeBr3 (s) has an enthalpy of -631 kj/mol and has an enthalpy of -269 kj/mol. the enthalpy of evaporation of Br2 (l) which is liquid at 25C is 142.7KJ/mol
The enthalpy of evaporation of a substance is the heat absorbed when one mole of the substance is converted from a liquid at its boiling point to a gas at the same pressure. To calculate the enthalpy of evaporation of Br2, we need to use the enthalpy of formation of FeBr3 and the balanced equation for the reaction.
The enthalpy of formation of a substance is the heat absorbed or released when one mole of the substance is formed from its elements at standard conditions.
ΔHf(FeBr3) = -269 kJ/mol
ΔHrxn = -631 kJ/mol2Fe(s) + 3Br2(g) -> 2FeBr3(s)
ΔHrxn = 2(ΔHf(Fe(s)) + 3(ΔHf(Br2(l)) - ΔHf(FeBr3(s)) -631 = 2(0) + 3(ΔHf(Br2(l)) -(-269)
3(ΔHf(Br2(l)) = -631 + 2(0) + 269
ΔHf(Br2(l)) = -631 + 2(0) + 269 / 3
ΔHf(Br2(l)) = -142.7 kJ/mol
The enthalpy of evaporation of Br2 is -142.7 kJ/mol
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PLEASE ANSWER ASAP- ANSWER ANY OF THE THREE OR ALL
1. For the following reaction, if 17. 8 g of Na2S, is reacted with excess AgNO3 in the laboratory, and 31 g of NaNO3 is produced, what is the percentage yield of NaNO3? Round your answer to the nearest whole percent.
Na2S + 2 AgNO3 → Ag2S + 2 NaNO3
2. For the following reaction, if 19. 7 g of H2, is reacted with excess CO in the laboratory, and 144. 5 g of CH3OH is produced, what is the percentage yield of CH3OH? Round your answer to the nearest whole percent.
CO + 2 H2 → CH3OH
3. For the following reaction, if 9. 7 g of AgNO3, is reacted with excess BaCl2, what is the theoretical yield of Ba(NO3)2 for this reaction? Round your answer to the nearest gram.
BaCl2 + 2 AgNO3 → 2 AgCl + Ba(NO3)2
Answers
The answer is 39.1 grammes if 9.7 g of AgNO3 reacts with extra BaCl2 in this process.
What is a reaction in science?In a chemical reaction, one or more substances—also known as reactants—are changed into one or more additional substances—also known as products. Chemical elements or chemical compounds make up substances. A response is a movement, propensity, or action that is taken in the opposite direction from what is intended. Reactions are made on the spur of the moment, without much thought or consideration of the potential outcome. Response: Saying something in response to another person's action or comment.
What are reactions examples?In daily life, there are several examples of chemical processes, such as photosynthesis, rust, baking, digesting, combustion, chemicals batteries, fermentation, and cleaning with soap and water. Not only in the chemistry lab, but all over the place, there are chemical reactions going on.
We have:
Na2S weight: 17.8 grammes
NaNO3 was actually created in 31 grammes.
The theoretical yield of NaNO3 that would result from 17.8 grammes of Na2S must now be determined.
We may calculate the number of moles using the molar mass of Na2S, which is 78.04g/mol:
78.04 grams = 1 mol
17.8 grams = x moles
78.04x = 17.8
x = 17.8/78.04
x = 0.23 moles of Na2S in 17.8 grams
Since the molar ratio of Na2S to NaNO3 is 1:2, we will make twice as much NaNO3 as Na2S.
0.23 * 2 = 0.46 moles of NaNO3 will be produced
We may determine the mass using the molar mass of NaNO3, 85g/mol:
85 grams = 1 mol
x grams = 0.46 moles
x = 0.46 * 85
x = 39.1 grams
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What is the Lewis symbol for Be2+? Select the correct answer below: :Be2+ :Be2+ Be2+ Be2+
Answers
The Lewis symbol for Be2+ is Be2+.
Beryllium is a neutral element that means the no. of electron sand no. of protons they are same. It has two valence electrons. Be lost two negative charges. They will lose two electrons. Be having most stable electronic configuration.
Beryllium is a steel gray metal which is quite brittle at a room temperature, and its chemical properties somewhat resemble with aluminum. They do not occur in a free nature. Be are used in many industries like; Ceramic manufacturing, automotive as well as areospace. Be is a group 1 carcinogen. It is a divalent element which occurs naturally only in combination with the other elements to form a mineral.
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Explain why the Vmax of the reaction is much lower with non-competitive inhibitor than reaction without inhibitor or with competitive inhibitor at high substrate concentrations.
Answers
The Vmax of the reaction is much lower with non-competitive inhibitor than reaction without inhibitor or with competitive inhibitor at high substrate concentrations because of noncompetitive inhibitor can only bind to an enzyme with or without a substrate at several places at a particular point in time
The substrate still binds to the enzyme in the presence of noncompetitive inhibitors. In fact, the binding of the substrate and inhibitor to the enzyme is completely unaffected by one another. The enzyme, however, is unable to catalyze the reaction to produce a product when the inhibitor is attached. Noncompetitive inhibition works by lowering the quantity of active enzyme molecules available to carry out a process.
In non-competitive inhibition, a different site on the enzyme is the spot where the inhibitor molecules interact with the substrate molecules rather than the active sites on the enzyme surface. As a result, there are less enzyme molecules available to catalyze the reaction. Thus, V m an x is decreased. Because of this, extra substrate cannot entirely overcome the non-competitive inhibitors. As a result, the reaction's V max decreases.
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When heated strongly, solid calcium carbonate decomposes to produce solid calcium oxide and carbon dioxide gas, as represented by the equation above. A sample of CaCO3 is placed in a rigid 35L reaction vessel from which all the air has been evacuated. The vessel is heated to 437°C at which time the pressure of CO2 in the vessel is constant at 1.00atm. Calculate the number of grams of CO2 gas that are present after the reaction completes.
Answers
The mass of the carbon dioxide gas is 26.4 g.
What is the mass of the carbon dioxide?We know that the mass of the carbon dioxide can be gotten from the number of moles of the compound that we have in the compound and we can be able to get it from the ideal gas equation.
Temperature = 437°C + 273
Volume = 35L
Pressure = 1.00atm
Number of moles = ?
Given that;
PV = nRT
n = PV/RT
n = 1.00atm * 35L/0.082 atm LK-1mol-1 * 710
n = 35/58.22
n = 0.60 moles
Mass = Number of moles * Molar mass
= 0.60 moles * 44 g/mol
=26.4 g
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At 850 K the equilibrium constant for the following reaction is Kc = 15 M-1.
2SO₂(g)+O₂(g)⇌ 2SO₃(g)
If we mix the following concentrations of the three gases, predict in which direction the net reaction will proceed toward equilibrium.
Left
No Change
Right
(SO₂)=0.20 M
O₂ = 0.60 M
(SO₃)=0.60 M
(SO₂)=0.18 M
O₂ = 0.10 M
(SO₃)=0.50 M
(SO₂)=0.70 M
O₂ = 0.80 M
(SO₃)=0.13 M
Chemical Equilibrium:
A chemical equilibrium is the reversible state of a chemical reaction system in which the concentrations of reactants and products do not change significantly with time. This state has a constant "K" dependent on temperature and the concentrations present at equilibrium. The reaction quotient "Q" is determined the same way but is for concentrations away from equilibrium. The relation between "K" and "Q" is an indicator in which way the reaction will proceed towards equilibrium.
Answers
When the reaction moves to the right to reach the chemical equilibrium, which is represented by the equation 2 SO2(g) + O2(g) 2 SO3(g) Kc=15, O2 = 0.80 M will be present.
What is an illustration of chemical equilibrium?is a condition in which the forward reaction rate is equal to the backward reaction rate. "A state where the concentration of reactant and product remains constant" is another definition of OR. For instance, H2(g)+I2(g)HI (g).
What does GCSE chemical equilibrium entail?When anything is said to be in equilibrium, it refers to a balanced state. It describes a state in chemistry when the concentrations of the reactants and products are stable. Equilibria, the plural form of the word, is used to describe the study of concentrations in chemical reactions.
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Calculate the pH of a 0.20 M solution of KCN at 25.0 ∘C.
Express the pH numerically using two decimal places.
ph =
Answers
The pH of the solution can be defined as the negative logarithm of the concentration of hydrogen ions or H+. In the equation form it is, pH = -log[H+]. These are the important equations to formulate when it comes to equilibrium pH problems.
KCN is actually a basic salt coming from the reaction of a weak acid, HCN, and a strong base, KOH. We know that HCN is the weak acid, the SCB is CN-. The reaction would be written as:
CN- + H2O ⇔ HCN + OH-
The important data that is the equilibrium constant of acidity of the weak acid is : Ka for HCN is 6.2×10^-10. Then, let's do the ICE(Initial-Change-Equilibrium) analysis.
CN- + H2O ⇔ HCN + OH-
I 0.2 m ∞ 0 0
C -x ∞ +x +x
-----------------------------------------------------------
E 0.2-x +x +x
The value x actually denotes the number of moles that CN- reacted. There is no value for H2O because the solution is dilute which means that water is added to the solution such that H2O>>>CN-.
Since the value of OH- is also calculated to be x, then OH-=0.001788 m. Consequently,
pOH = -log(0.001788) = 2.75
Calculation is pH = 14 - pOH = 14 - 2.75
pH = 11.25
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the radioactive isotope 32p decays by first-order kinetics and has a half-life of 14.3 days. how long does it take for 95.0% of a sample of 32p to decay?
Answers
Since 32p has first-order kinetics and a half-life of 14.3 days, it will take 62 days for 95.0% of a sample to degrade. The half-life of a chemical reaction is the time interval during which the concentration.
Of a particular reactant reaches 50% of its initial concentration (i.e. the time taken for the reactant concentration to reach half of chemical reaction and its initial value). The sign "t1/2" is used to denote it and is frequently expressed in seconds. Isotopes are two or more atom types that share the same atomic number (number of protons in their nuclei) and position in the periodic table. 0.693/14.3 = 2.303/t *(log(100/5))
t = 61.82 days
t = 62days
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predict whether the following reactions are possible. Explain
your answers.
a. Ni(s) + MgSO4(aq) →→→→ NiSO4(aq) + Mg(s)
b. 3Mg(s) + Al₂(SO4)3(aq) →→→→ 3MgSO4(aq) + 2Al(s)
c. Pb(s) + 2H₂O(1)→→→→ Pb(OH)₂(aq) + H₂(g)
Help please!!!!
Answers
Answer:
A - not possible, B - possible, C- possible
Explanation:
You need to consider the reactivity series table. Check the attachment below.
A. If you see in the table, nickel is way below magnesium, meaning less reactive, and hence will not be able to snatch SO4 away from magnesium because it is not reactive enough so A is wrong.
B. Magnesium is more reactive than aluminium as mag appears right above alum, so yes possible.
C. Pb is lead which is more reactive than hydrogen so C is also possible.
Are the bonds in each of the following substances ionic, nonpolar covalent, or polar covalent?
(a) KCl
ionic
nonpolar covalent
polar covalent
(b) P4
ionic
nonpolar covalent
polar covalent
(c) BF3
ionic
nonpolar covalent
polar covalent
(d) SO2
ionic
nonpolar covalent
polar covalent
(e) Br2
ionic
nonpolar covalent
polar covalent
(f) NO2
ionic
nonpolar covalent
polar covalent
Arrange the substances with polar covalent bonds in order of increasing bond polarity. (Use the appropriate <, =, or > symbol to separate substances in the list.)
Answers
KCl has ionic bond, P4 has nonpolar covalent bond, BF3 has polar covalent bond SO2 has polar covalent bond, Br2 has nonpolar covalent, NO2 has polar covalent bond.
An ionic bond is what?Ionic bonds, also known as electrovalent bonds, are a type of linkage created in a chemical molecule by the electrostatic attraction of ions with opposing charges. Whenever the valence (outer portion) electron of one atom are permanently transferred to another atom, a bond of this kind is created.
What distinguishes an ionic link from a covalent bond?Ionic bonds are produced among atoms of metals & non-metals in which the metal loses the electron to complete the octet and such non-metal acquires the electron to complete the octet. Covalent bond, when two atoms share electrons to complete their octets.
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Click Pause ( ). Elements can be classified as metals and nonmetals. Metals do not hold on to their valence electrons very tightly, while nonmetals hold their electrons tightly. Electron affinity is a measure of how tightly the valence electrons are held.
A. Try pulling an electron away from each atom. Based on this experiment, which atom is a metal?
Sodium Which is a nonmetal? Chlorine
B. Try moving an electron from the metal to the nonmetal. What happens?
Sodium lets go of its one electron.
Answers
A. The alkali metal family of the periodic table includes sodium, a soft, silvery metal. Additionally, it reacts quickly.
B. Ionic bonds between sodium and chlorine form. Each one takes electrons. An electron can accept sodium.
Why does sodium's electron come to chlorine?The other atom's electrons are drawn to the protons of the other two atoms. Chlorine has a stronger attraction for electrons than sodium, as evidenced by the thicker arrow. The electron from the sodium atom's outer energy level is transferred to the chlorine atom's outer energy level during the interactions between the atoms.
To achieve its octet configuration and produce a negatively charged anion, this chlorine atom accepts one electron.
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Which of the following could be the identity of a white crystalline solid that exhibits the following properties?-It melts at 320°C.-It does not conduct electricity as a solid.-It conducts electricity in an aqueous solution.C6H12O6(s)NaOH(s)SiO2(s)Cu(s)
Answers
The white crystalline solid which exhibits a melting point at -320°C and will not conduct electricity is NaOH
Manufacturers can use sodium hydroxide to make soap, rayon, paper, explosive products, dyes, and petroleum products. Other jobs where sodium hydroxide can be used include processing cotton cloth, cleaning and processing metals, oxide plating, electroplating, and electrowinning. Many metal hydroxides such as LiOH, NaOH, KOH, and Ca(OH)2 are bases. Non-metallic hydroxides like hypochlorous acid (HOCl) are acids.
Properties of sodium hydroxide
Sodium hydroxide in its pure form is a white crystalline solid. Odorless.Soluble in water, glycerol, and ethanol. ...It has a higher viscosity than water, about 78 mPas.Multiple hydrates can be formed.Learn more about the crystalline solid in
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a mixture of coarse sand and sugar is 45.0 percent sand by mass. 120.0 grams (g) of the mixture is placed in a fine-mesh cloth bag and dunked repeatedly in lake michigan. after drying, the mass of the contents of the bag equals:
Answers
After drying, the mass of the contents of the bag equals is X=54g if 45.0 percent sand by mass. 120.0 grams of the mixture is placed in a fine .
Why does mass mean?6vmass, the central act of worship of the Roman Catholic Church, which culminates in celebration of the sacrament of the Eucharist. The term mass is derived from the ecclesiastical Latin formula for the dismissal of the congregation .
What's mass in physics?mass, in physics, quantitative measure of inertia, a fundamental property of all matter. It is, in effect, the resistance that a body of matter offers to a change in its speed or position upon the application of a force. The greater the mass of a body .
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The element that corresponds to the electron configuration 1s22s22p63s23p64s13d5 is Cr. For the three ions formed by this element, 2+, 3+ and 6+ charged respectively, write the electron configuration and explain the property of paramagnetism or diamagnetism for each species.
Answers
Due to the unpaired electrons, it is paramagnetic. Because it has 3 unpaired electrons (4-152 252 2pt 332 3p 3d), it is paramagnetic. For G2+, all electrons are coupled (132 257 24us$ 752 3p 30).
What does chemistry mean by paramagnetic?The presence of a dipole moment magnetic in an unpaired electron causes paramagnetism. According to QED, an electron's magnetic moment results from its orbital motion and spin characteristics, giving it quantum-style angular momentum.
Why are bonds paramagnetic?The majority of atoms with partially filled orbitals are paramagnetic due to the existence of unpaired electrons within the material, while there are some outliers like copper. Unpaired electrons have such a magnetic magnetic dipole because of their spin, which makes them behave like small magnets.
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What is an atom,alloy and element?
Answers
Alloy = A metal alloy is a substance that combines more than one metal or mixes a metal with other non-metallic elements.
Element = A chemical element is a species of atoms that have a given number of protons in their nuclei, including the pure substance consisting only of that species. Unlike chemical compounds, chemical elements cannot be broken down into simpler substances by any chemical reaction.
Alloy is a metal made by combining two or more metallic elements, especially to give greater strength or resistance to corrosio
a 10.0 gram sample of impure silicon is 99.44% silicon by mass and the rest is carbon. the mass of carbon present in the sample is:
Answers
(E) 0.056 g weight of carbon in the sample is the answer that is correct.
Is silicon a type of metal or not?Silicon is really a metalloid, a material that falls somewhere between the two categories of metals and non-metals. There is no clear definition of what falls under the category of metalloid, although in general, metalloids exhibit characteristics from both metallic and non-metals.
Given mass percent of silicon = 99.44 %
So, mass percent of carbon = (100-99.44) %
= 0.56 %
Hence, mass of carbon = 0.56 % of 10 g
= (0.56/100)×10 g
= 0.056 g
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The Complete Question is :
a 10.0 gram sample of impure silicon is 99.44% silicon by mass and the rest is carbon. The mass of carbon present in the sample is: Select one: OA. 9.944 grams OB. 99.44 grams OC. 0.56 grams O D. 5.6 x 10³ grams O E 0.056 grams
beryllium fluoride is an ionic compound with the following formula: bef2 what are the charges of beryllium (be) and fluorine (f) ions in this compound?
Answers
The beryllium ion has a charge of +2 and the fluorine ion has a charge of -1.
What is fluorine?Fluorine is a chemical element on the periodic table with an atomic number of nine and a symbol of F. It is the most reactive of all elements, and is the only element that forms compounds with all other elements. It is a pale yellow gas with a pungent odor. It readily forms compounds with most metals and nonmetals, and is found in many minerals. Fluorine is used in industries such as glass, ceramics, and aluminum production. It is also used to produce uranium fuel for nuclear power plants. Fluorine is widely used in toothpaste, mouthwash, and other dental products to prevent tooth decay.
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copper(I) ions in aqueous solution react with NH3(aq) according toCu^+(aq) + 2NH3(aq) yields Cu(NH3)2^+(aq), Kf=6.3*10^10 M^-2calculate the solubility (in g . L^-1) of CuBr(s) in 0.23 M NH3(aq)answer must be in g/L
Answers
The copper(I) ions in aqueous solution react with NH₃ (aq). The solubility of the CuBr in 0.23 M NH₃ is 57.24 g/L.
The solubility equilibrium of the CuBr :
CuBr(s) ⇄ Cu⁺(aq) + Br⁻(aq)
Ksp = [Cu⁺] [ Br⁻] = 6.3 × 10⁻⁹
[Cu(NH₃)₂]⁺ , Kf = 6.3 × 10¹⁰
Kf = [Cu(NH₃)₂]⁺ / [Cu⁺] [NH₃]²
= 6.3 × 10¹⁰
K = [Cu(NH₃)₂]⁺ [Br⁻] / [NH₃]²
= ([Cu(NH₃)₂]⁺) / [Cu⁺] [NH₃]² ([Cu⁺] [ Br⁻] )
K = Kf ×Ksp
K = 4 × 10²
CuBr + 2NH₃ ⇄ [Cu(NH₃)]⁺ + Br⁻
K = [Cu(NH₃)]⁺ [ Br⁻] / [NH₃]²
4 × 10² = x × x / ( 0.23 - 2x)²
x = 0.39
The solubility of CuBr = 0.399 × 143.5
= 57.24 g/L
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Physical properties can be used to compare and classify substances. The process below demonstrates a physical property of sugar
Answers
1. Place a spoonful of sugar in a bowl. 2. Observe the shape and color of the sugar. 3. Note the texture of the sugar. The process below demonstrates a physical property of sugar.
What is physical property?
A physical property is a characteristic of a material or substance that can be observed and measured without changing the material's chemical composition. Examples of physical properties include color, shape, density, melting point, boiling point, electrical conductivity, and solubility.
A physical property is a characteristic of matter that can be observed and measured without changing the chemical identity of a substance. Examples of physical properties include color, density, hardness, melting point, boiling point, and thermal conductivity.
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12
(e) Ethane-1. 2-diol has two alcohol functional groups.
H H
H-0-C-C-0-H
Η Η
One molecule of ethane-1,2-diol will react with two molecules of ethanoic acid to form
molecule X
X has two ester functional groups and a molecular formula of CHO
(i) State the empirical formula of X.
[1]
Answers
The stated assertion implies that X has the empirical formula C₃H₅O₂ since ethane-1, 2-diol has eight drinking functional groups.
How is a molecule created?When five or more atoms come together and establish bonds with one another, a molecule is created. When two atoms link together, they share a single electron. A molecule is created as a result of a covalent connection.
What makes water a molecule?Because it has molecular bonds, water is a molecule. Water is a compound as well since it contains several different types of elements (oxygen and hydrogen). You might claim that water is really a type of molecule if you want.
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Which is the simplest form of a crystalline solid?
lonic compounds
Non-Metals
Halogens
Metals
Answers
The most basic type of solid crystalline lonic compounds. Ions form the bulk of an ionic composition.
The correct statememnt is A.
Is water ionic or covalent?Ionic in nature, the covalent connection between the two hydrogen atoms in a water molecule is created when they deposit their positive charges on opposing sides of the oxygen atom, which has a negative charge.
What makes ionic bonding so durable?Ionic radius affects how strong an ionic bond is. The ionic lattice can accommodate smaller ions by allowing for closer packing. The electrostatic forces between oppositely charged ions become greater the closer they are to one another, and this increases the strength of the ionic bond.
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You have samples of 3 different dandelion poisons. They cost $10 a gallon, $20 a gallon and $30 a gallon respectively. You would like to determine which one is the most effective. State your hypothesis, design an experiment, and state a result that would support your hypothesis quiz
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The toxin that costs $30 per gallon is the most potent. We can draw the conclusion that the dandelion poison that costs $30 per gallon is the most potent.
What poison has the highest potency?Toxin from botulinum. Although scientists have different opinions on the relative toxicity of various compounds, most appear to concur that the anaerobic bacteria-produced botulinum toxin is the most toxic substance ever discovered. At most 1 nanogram per kilogram of its LD50 can kill a human.
What three sorts of poison are there?In terms of poisoning, chemicals can be broken down into three major categories: biological poisons, or substances derived from plants and animals, pharmaceuticals, and health care goods. The following discussion covers these three categories as well as a fourth one called radiation.
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Fill in the blank with the correct term. The part of one type of amino acid that makes it different from another type is the .______
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The part of one type of amino acid that makes it different from another type is the side chain (or R group).
A side chain is a group of atoms that are attached to the alpha carbon atom of the amino acid and is composed of either a hydrogen atom, an alkyl group (a carbon atom with several hydrogen atoms attached), an aryl group (a carbon atom with several hydrogen atoms and a benzene ring attached), an acidic group (a carboxyl group or a sulfhydryl group), or a basic group (an amine group, a guanidinium group, or an imidazole group).
Each amino acid has a unique side chain, which is what gives it its unique chemical and physical properties and distinguishes it from other amino acids. The side chain is also what determines the amino acid's behavior in different environments, such as its solubility, reactivity, and charge.
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The part of amino acids that makes them different from one another is R- Group.
Amino acids are organic compounds. Its molecules combine to form proteins and proteins are called the building blocks of life. Every amino acid has a hydrogen atom present in them along with a carboxyl group, an alpha-amino group, and also the R-group.
R -Group makes the side chain. The side chain present in each Amino acid is the only unique feature that differentiates them. The R groups have a variety of sizes, shapes, charges, and reactivities. Thus, allowing them to be grouped according to the chemical properties of their side chains.
Therefore, the only main factor that makes every amino acid different is the presence of the R-group.
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Give the full electron configuration for nitrogen. electron configuration: || 1s2s2p
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1s can only accommodate two electrons. For N, the next two electrons enter the 2s orbital. The 2p orbital will house the final three electrons. A 1s22s22p3 electron configuration will therefore be present in the N.
How do you determine the configuration of an electron?The shell number (n) is the first symbol used to represent an electron configuration, followed by the kind of orbital and the superscript number of electrons in the orbital. Consider this: The periodic table shows that oxygen has eight electrons.
What three principles govern electron configuration?In other words, we abide by the Aufbau Principle, Electron - electron Concept, and Hund's Rule.
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if your water heater can supply 40 kbtu/h (thats kilo-btu/h), how long will it take to heat this water?
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If a water heater can supply 40 KBTU/h then it will take 35.64 second to heat the water. This is calculated using the specific heat of water and the power concept.
The electrical energy is used totally depends on the total power used by all the electrical devices and the total time they are used. One kilowatt hour is equal to 1000 watts of power used for one hour of time.
time taken= energy required/ power delivered
System is used to define the measurement of a physical quantity. It is termed as the unit. Different types of unit measurement systems used are the SI unit system, MKS unit system, Imperial unit system, British unit system, etc.
1 BTU = 1055.6 J
Specific heat of water Cw. = 4186 J/Kg.
Time taken = energy required / power
= 100 . Cw. / 1055.6 * 40*
= 100 * 4186 / 1055.6 * 40 .
= 9.9 * hours
= 35.64 sec
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