The numerical value of the Ksp of [tex]BaSO_{4}[/tex] is 1.69 * 10^-20.
What is the Ksp?The Ksp is an equilibrium constant that shows the extent to which a substance is soluble in water. Now consider the fact that [tex]BaSO_{4}[/tex] is almost insoluble in water.
i) The Ksp of the [tex]BaSO_{4}[/tex] solution can be obtained from the relation;
Ksp = [[tex]Ba^{2+}[/tex]] [[tex]SO_{4}^{2-}[/tex]]
ii) The numerical value of the Ksp is obtained from; [1.30 × 10–10]^2 = 1.69 * 10^-20
iii) The reason for the toxicity of [tex]BaCO_{3}[/tex] even though it is not more soluble that barium sulfate is that [tex]BaCO_{3}[/tex] can dissolve in the gastrointestinal tract which is acidic leading to barium poisoning.
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Suppose a graduated cylinder were not correctly calibrated. how would this affect the results of a measurement? how would it affect the results of a calculation using this measurement?
The volume measurements won't be accurate and will be either less than or more than the anticipated figure if the graduated cylinder is accurately calibrated (depending on if the error in calibration is higher or lower). Depending on the calibration error, the calculated value may be higher or lower than the real value.
What is calibration?
Setting up an instrument so that it can generate findings for samples that fall within a tolerable range is part of the calibration process. A key component of instrumentation design is eliminating or reducing conditions that lead to faulty measurements.
Calibration attempts to reduce any measurement uncertainty by confirming the precision of test apparatus. In measuring procedures, calibration quantifies and reduces mistakes or uncertainties to a manageable level.
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Write down the names of the new substances formed when each of the following substances reacts with dilute hydrochloric acid: (i) ammonia (ii) sodium hydroxide (iii) calcium carbonate
The names of the new substances formed are:
1) ammonium chloride (NH₄Cl)
2) Sodium chloride (NaCl)
3) Calcium chloride (CaCl₂) and carbon(IV) dioxide (CO₂)
1) Balanced chemical equation for reaction of ammonia (NH₃) and dilute hydrochloric acid (HCl):
HCl + NH₃ → NH₄Cl
2) Balanced chemical equation for reaction of sodium hydroxide (NaOH) and dilute hydrochloric acid:
HCl + NaOH → NaCl + H₂O
3) Balanced chemical equation for reaction of calcium carbonate (CaCO₃) and dilute hydrochloric acid:
CaCO₃ + 2HCl → CaCl₂ + CO₂ + H₂O
These chemical reactions are double displacement reactions, cations and anions of the two reactants switch places and form two new compounds.
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Determine the limiting reactant and calculate the number of grams of sulfur dioxide, so2, that can be formed when 27.3 g of methane thiol, ch3sh, reacts with 38.6 g of oxygen, o2.
When Methane thiol, CH₃SH, reacts with O₂, 25.8 grams of Sulfur dioxide, SO₂ is formed and limiting reactant is Oxygen, O₂.
The balanced chemical reaction is:
CH₃SH(g) + 3 O₂(g) → 2 H₂O(g) + CO₂(g) + SO₂(g)
Molecular weights: Actual/given mass:
CH₃SH = 48.11 g/mol 27.3 g
O₂ = 32.01 g/mol 38.6 g
H₂O = 18.01 g/mol
CO₂ = 44.01 g/mol
SO₂ = 64.06 g/mol
Number of moles = Given mass
Molecular mass
So,
moles of methane thiol = 27.3 ÷ 48.11= 0.56 moles
moles of oxygen = 32.01÷38.6 = 0.82 moles
From the reaction,
1 mole of CH₃SH reacts with 3 moles of O₂ to give 1 mole of SO₂
Thus, 0.56 moles of CH₃SH reacts to form 1 × 0.56 = 0.56 moles of SO₂
Mass of SO₂ produced is 0.56 × 64.06 g = 35.86 g
moles of SO₂ = 35.86 ÷ 64.06 = 0.55 moles
So,
A 2.00-mol sample of a diatomic ideal gas expands slowly and adiabatically from a pressure of 5.01 atm and a volume of 12.5 l to a final volume of 29.3 l. (a) what is the final pressure of the gas?
By ideal gas approximation, the final pressure is 2.14 atm.
We need to know about the ideal gas theory to solve this problem. The ideal gas is assumed that there is no interaction between particles in a gas. It can be determined by the equation
P . V = n . R . T
where P is pressure, V is volume, n is the number of moles gas, R is the ideal gas constant (8.31 J/mol.K) and T is temperature.
From the question above, we know that
V1 = 12.5 L
V2 = 29.3 L
P1 = 5.01 atm
When the initial and final temperature is the same, we can use the ratio of pressure and volume as
P1 . V1 = P2 . V2
5.01 . 12.5 = P2 . 29.3
P2 = 2.14 atm
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A molecule has an empirical formula of ch, and its molar mass is known to be 26 g/mol. What is its molecular formula?.
The molecular formula of a molecule that has an empirical formula of ch and its molar mass is known to be 26 g/mol is C₂H₂
What is the molecular formula?The molecular formula of a compound is the total number of atoms present in a molecule of the compound.
The empirical formula of the molecule is the simplest whole number of atoms of a compound.
The empirical formula of the molecule is ch
The molar mass is 26 g/mol
So, the molecular formula will be C₂H₂ and the compound is acetylene. It is a hydrocarbon.
Thus, the molecular formula of the molecule is C₂H₂.
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Describe the energy inputs and outputs of a bonfire.
Answer:
The logs are the input and the flames are the output
Explanation
How many ml of a 5m solution of sodium borate must be added to a 200 ml solution of 50mm boric acid in order for the ph to be 9.6?
19 ml of a 5m solution of sodium borate must be added to a 200 ml solution of 50mm boric acid in order for the ph to be 9.6
Here pH=Pka-log[A]/[B]
= 9.6=9.24-log[A]/[B]
= log[A]/[B]=-0.36
Here for ml molarity formula is used
Molarity=mass/volume here mass of sodium borate is 381g/mol and volume of solution is 200ml
mass/volume=381/200=1.905/5.0×50=19ml
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46. how many moles are there in each sample!
a. 55.0 g ti
b. 16.9 mg na
c. 7.95 x 1024 ne atoms
d. 25 xe atoms
a. 55.0 g of ti = 0.02 moles
b. 16.9 mg of na = 0.62 moles
c. 7.95 x 1024 ne atoms = 0.4 moles
d. 25 xe atoms = 0.0037 moles
What is mole?In chemistry, the term "mole" (sometimes written "mole") refers to a standard scientific unit for measuring vast amounts of extremely small objects like atoms, molecules, or other specific particles.
The mole represents 6.02214076 × 10^23 units, an astronomically huge number. With effect from May 20, 2019, the International System of Units (SI) adopted this number as the mole definition by the General Conference on Weights and Measures.
The number of atoms found in 12 grams of carbon-12, as established scientifically, made up the definition of the mole in the past. The quantity of units in a mole is also known as Avogadro's number or Avogadro's constant in honor of the Italian physicist Amedeo Avogadro (1776–1856).
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Determine the number of m in 1600 mm.
Answer:
1600 mm to m = 1.6 meters
Explanation:
How does the electron configuration of ions derived from representative elements give them stability?
The electron configuration of ions derived by stable arrangement.
What is electron configuration of ions?Their valence shell contains two or eight electrons. They don't acquire, shed, or distribute electrons.
An atom with a full outermost (valence) shell has a stable electrical configuration. The quantity of electrons that leave or enter an atom's outer shell is known as its valency.
A noble gas configuration is a stable electron configuration for representative or main group elements. By acquiring or losing electrons and forming ions, or by sharing electrons with other atoms, the representative elements' atoms can adopt a noble gas structure.
The stability of an electron arrangement can be predicted. When all of an atom's orbitals are filled, it is at its most stable and unreactive. The combinations with full energy levels are the most stable.
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Write a balanced chemical equation for the standard formation reaction of solid calcium hydroxide caoh2
The balanced chemical equation for the standard formation reaction of solid calcium hydroxide CaOH2 is:
Ca + O2 + H2 → Ca(OH)2
The reactant components that are required in the standard states are calcium(Ca), Oxygen(O2), and hydrogen(H2). Oxygen and hydrogen are in their gaseous form and calcium is in solid state.
All of these reactants react to form Ca(OH)2 which is also known as slaked lime.
Ca + O2 + H2 → Ca(OH)2
This chemical equation is balanced because there are 1 Ca, 2 Oxygen atoms and 2 Hydrogen atoms on either sides.
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Which transition metals usually form only one monatomic cation? select all that apply.
Zn, Cd, and Ag are transition metals that usually form only one monoatomic cation.
A monatomic cation is a cation made of only one atom.
Cations are positively charged ions, in this example Ag⁺, Cd²⁺ and Zn²⁺.
These cations form only one type of ion, while iron and copper form more than one type of cations.
Iron and copper form cations with different charges (Fe²⁺, Fe³⁺, Cu⁺, Cu²⁺).
It depends on electron configuration which type would be formed.
Electron configuration of zinc atom: ₃₀Zn 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s²
Transition metals are elements in the d-block of the Periodic table.
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After teaching a group of students about fats and biotransformation, the instructor determines that the teaching was successful when the students identify what as the storage location of bile acids?
The storage location of bile acids is the gall bladder.
Bile acids are made from cholesterol in the liver. Cholic acid and chenodeoxycholic acid are the major bile acids.
These acids are very crucial for the digestion of dietary fats and fat-soluble vitamins(A, D, E, and K).
The bile that is secreted by the liver passes through the hepatic ducts and is stored and concentrated in a thin muscular sac called the gall bladder. The bile then reaches the small intestine where it acts upon the food and helps in its digestion.
Therefore, the instructor determines that the teaching was successful when the students identify the gall bladder as the storage location of bile acids.
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A sample of nitrogen gas is contained in a piston with a freely moving cylinder. At 0°c, the volume of the gas is 371 ml. To what temperature must the gas be heated to occupy a volume of 557 ml? report your answer in degrees celcius to the nearest whole number.
The gas must be heated to a final temperature of 137°C in order to fill a volume of 557 ml.
Given,V₁= 371mlV₂ = 557 mlT₁ = 0°C or 273 K
The final gas temperature that has to be heated must be determined.
As long as the cylinder is free to move, the pressure is always 1 atm, or equal to the external pressure.
Consequently, by using Charles Law, we obtain
V₁ / T₁ = V₂ / T₂
where starting and ultimate volumes V1 and V2, respectively T1 and T2 are beginning and ultimate temperatures, respectively (in Kelvin).
The ultimate temperature is as a result
T₂ = V₂ × T₁ / V₁Or, T₂ = 557 x (0+273) / 371Or, T₂ = 410 KOr, T₂ = 137°C.
As a result, the temperature is 137°C at the end.
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What is the mass percent of an ammonium carbonate solution prepared by dissolving of solid into of water?
the mass percent is 45.67%
The mass percentage of a solution is calculated as the solute concentration in grams per 100 g of the solution.
Given that 39.5 g of water dissolves 33.2 g of ammonium carbonate.
∴
Mass of the solution is (33.2+39.5) g = 72.7 g
So, the solution of 72.7 g includes 33.2 g of ammonium carbonate.
So 100 g solution contains
33.2/72.7×100≈45.67 g ammonium carbonate
Thus the mass percentage of the solution is 45.67%
One approach to show the concentration of an element in a compound or component in a combination is as a mass percentage. The mass percentage is computed by dividing the total mass of the combination by the mass of each component and multiplying the result by 100%.
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When two protons are extremely close to each other there is a strong __________ between them.
When two protons are extremely close to each other, there is a strong nuclear force between them.
The force between a proton and neutron is same as the force between two proton, which the nuclear force. Nuclear forces can also be called as the nuclear interactions. Nuclear forces affects the neutrons and protons, both nucleons in identical or similar way.
Strong nuclear force is one of the fundamental forces of the nature and it is strongest among the four. Four fundamental forces are -Gravitation, strong nuclear force, weak nuclear force, and electromagnetism.
The energy that is used in nuclear power and nuclear weapons, the nuclear force has an important role in storing it. To bring the charged protons together against their electric repulsion, energy is required. When the protons and neutrons are bound together by the nuclear force they form a nucleus, this energy is in stored form.
So, the strong forces holding two protons extremely close is strong nuclear forces.
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When placed inside of a magnetic field, nmr active nuclei act in what way? (1 pt)
When placed inside of a magnetic field, the magnetic field that electrons generate aligns in the opposite direction of the applied magnetic field.
Magnetic fields are used in all modern technology, especially in electrical engineering and electromechanics. Rotating magnetic fields are used in both electric motors and generators. Magnetic field interactions in electrical devices such as transformers are conceptualized and studied as magnetic circuits. Magnetic forces use the Hall effect to provide information about charge carriers within a material.
The Earth creates its own magnetic field, which protects the Earth's ozone layer from the solar wind and is important for navigating with a compass. Magnetism is a class of physical properties imparted by magnetic fields and refers to the ability to induce attractive and repulsive phenomena in other entities.
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John needs 6 m of wood to build a diving board. The wood comes in different size packages. Select all the packages John could buy that would meet his needs?
3 pieces at 2000 mm each
4 pieces at 1.5 cm each
6 pieces at 100 mm each
6 pieces at 100 cm each
8 pieces at 200 mm each
On calculating using conversions, John can select either the package of wood with (a) 3 pieces of 2000mm each or the one with (d) 6 pieces of 100cm each.
On conversion of units from mm and cm to m:
1m = 100cm
1m = 1000mm
Therefore,
Since John requires 6m of wood to build a diving board, using unit conversions:
3 pieces of 2000mm each:
2000mm = 2m = 2m x 3 = 6m
4 pieces of 1.5 cm each:
1.5cm = 0.015m x 4 = 0.06m
6 pieces of 100 mm each:
100mm = 0.1m x 6 = 0.6m
6 pieces of 100 cm each:
100cm = 1m x 6 = 6m
8 pieces of 200 mm each:
200mm = 0.2m x 8 = 1.6m
Result:
The package with 3 pieces wood of 2000mm each equals to 6m of wood.
Similarly, the package with 6 pieces wood of 100cm each equals to 6m of wood.
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HELP, as much as i try to understand i cant
The table is based on the periodic table and is to be filled by finding out various elements of periodic table
Disclaimer:
The table given below is not clear and hence only general idea can be provided
The table is based on the idea of periodic table where various constituents such as mass number, overall charge , total particles, number of protons have been asked to be labelled.
Sodium has been solved as an example and various postulates of Cu is being provided to solve accordingly
In the constituents of element Cu
Name- Cuprous and Cupric
Atomic number-29
Mass number-63
overall charge-+2 for Cuprous and +3 for Cupric
Total particles in nucleus-63
number of protons -29
number of neutrons-34
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If you separated a gypsum stone cast from an alginate impression beyond the optimum time interval, you could expect the cast to be?
The 12-hour time of contact between alginate and therefore the plaster cast is not recommended because it influences the quality of the plaster cast
What is gypsum cast?Gypsum may be a resource that is found by doing a variety of activities. Gypsum are often crafted into Gypsum Orbs, which may then be turned into special caches is called Gypsum Casts. Gypsum Casts are gear type specific, and when opened, guarantee an Expertise bump for that sort of gear as well as an item of that type.
Is gypsum utilized in cast?Gypsum products are one among the most broadly utilized dental materials for fabrication of dental casts and dies which are used as for further construction of indirect dental restorations
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The density of benzene at 15 °c is 0. 8787 g/ml. Calculate the mass of 0. 1500 l of benzene at this temperature. Enter your answer in terms of grams, but do not include units in the blank.
Using benzene density, the mass of benzene is 131.805 grams.
We need to know about the density to solve this problem. Density is a unit that measures how dense an object is. Density can be measured by dividing mass by volume. It can be written as
ρ = m / V
where ρ is density, m is mass and V is volume
From the question above, we know that
ρ = 0.8787 g/mL
V = 0.15 L = 150 mL
By substituting the following parameters, we get
ρ = m / V
0.8787 = m / 150
m = 0.8787 . 150
m = 131.805 grams
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The anaerobic process of splitting glucose and forming two molecules of pyruvic acid.
The anaerobic process of splitting glucose and forming two molecules of pyruvic acid is called 'glycolysis.'
The word glycolysis means 'glucose splitting' and this is what happens throughout the process.
During glycolysis, enzymes are used to split one molecule of glucose into two molecules of pyruvate (pyruvic acid).
This process produces end products which include two molecules of ATP and two molecules of NADPH as well as water.
As this is an 'anaerobic process' which means it doesn't need oxygen for the process.
The process of glycolysis also takes place inside the cytoplasm and occurs in both aerobic and non-aerobic organisms.
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The main function of a(n)______ is to help an interaction between two chemicals to occur, changing both chemicals.
The main function of a vitamin is to help interaction between two chemicals to occur, changing both chemicals.
In toxicology, synergism refers to the effect caused when exposure to two or more chemicals at one time results in health effects that are greater than the sum of the effects of the individual chemicals.
What are vitamins?
nutrients may be described as a special elegance of micronutrients that must be received from the food regimen for you to maintain frame homeostasis, which can be liposoluble or hydro soluble.nutrients are natural molecules which can be required for the proper functioning of the frame and the development of organisms.There are thirteen vitamins in people, of which 9 are water soluble and four (A, D, E, okay) are fats soluble.Therefore, the main function of a vitamin is to help interaction between two chemicals to occur, changing both chemicals.
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The molecules in a sample of solid so2 are attracted to each other by a combination of?
The molecules in a sample of solid so2 are attracted to each other by a combination of London forces and dipole-dipole interactions.
What are London forces?Other names for London dispersion forces include dispersion forces, London forces, fluctuation induced dipole bonds, instantaneous dipole-induced dipole forces, and weakly van der Waals forces. Since the electrons are often arranged symmetrically with regard to the nucleus, they serve as a form of electrically symmetric force between atoms and molecules.
What are dipole dipole interactions?Dipole-dipole interactions, which result from the close association of induced or permanent dipoles, are weak interactions. Van der Waals interactions are the name given to these forces taken as a whole. These interactions are widespread in proteins and range widely in strength.
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You are heating a piece of glass and now want to pick it up. you should?
Answer:
pick it up with tongs
Explanation:
Has two naturally occurring isotopes, and , with masses of 68.9257 u and 70.9249 u, respectively. calculate the percent abundances of these isotopes of gallium.
The percentage abundance of isotopes of gallium is 61.56% is Ga-70.92 & 38.44% is Ga-68.93.
What do you mean by gallium?Gallium (31Ga) is composed of two stable isotopes: gallium-69 and gallium-71. Gallium-67 and gallium-68 are the most commercially important radioisotopes.
Gallium-67 (half-life: 3.3 days) is a gamma-emitting isotope (the gamma ray emitted immediately after electron capture) that is used in standard nuclear medical imaging procedures known as gallium scans. It is most commonly used as the free ion, Ga3+. It is the gallium radioisotope with the longest half-life.
Are gallium isotopes naturally occurring?Gallium has two naturally occurring isotopes: Ga-69 (mass 68.9256 amu, natural abundance 60.11%), and Ga-71 (mass 70.9247 amu, natural abundance 39.89%).
Calculate the percent abundances of these isotopes of gallium.Gallium's average atomic mass =[tex]\frac{68.9257 +70.9249}{2}[/tex]
=69.9253
Let x equal the percentage abundance of the first isotope.
by utilizing
AAM=[tex]\frac{W_{1}X_{1} * W_{2} X_{2} }{100}[/tex]
[tex]69.70 = \frac{70.925 *X +68.926 * (1-X)}{100}[/tex]
[tex]69.70 = 70.925X + 68.926 - 68.926 X[/tex]
x = 61.56%
61.56% is Ga-70.92. (100-61.56)
& 38.44% is Ga-68.93.
The percentage abundance of isotopes of gallium is 61.56% is Ga-70.92 & 38.44% is Ga-68.93.
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Benny pushes a 20 kg crate from rest. If the crate accelerates at a rate of 3 m/s2, what is the amount of force applied for it to move?
Answer:
60 N.
Explanation:
The force formula of acting on an object is F=ma.
This means that...
F= force
M - mass
A = acceleration
So to solve this you have to solve for F.
F=ma
F=(20kg)(3m/s^2)
F= 60 N.
I hope this helps, have a good day! :D
1. How much NaCl can you get from 20g of NaOH?
NaOH + HCl →→ NaCl + H₂O
Answer:
29.25g
Explanation:
Number of moles = Mass / Molar mass
Number of moles of NaOH = 20g/(23 + 16 + 1)
= 0.5mol
1 mol of NaOH = 1 mol of NaCl
Therefore, 0.5mol of NaOH = 0.5mol of NaCl
0.5mol = Mass of NaCl / (23 + 35.5)
Mass = 0.5 × 58.5
= 29.25g
I hope this helps! ^^
Hydrolysis of which covalent bonds in atp releases a considerable amount of energy?
There is a significant quantity of energy released during the hydrolysis of the covalent bonds in ATP.
Phosphate-phosphate bond hydrolysis occurs during the breakdown of an ATP molecule, which releases a significant amount of energy.
How is ATP hydrolysis defined?
Adenosine triphosphate (ATP) contains highly energetic phosphoanhydride bonds that, when broken, such as occurs in muscles, release chemical energy through a catabolic reaction process called ATP hydrolysis.Nitrogen-carbon double bonds, phosphate-phosphate bonds, carbon-hydrogen bonds, and hydrogen bonds are all found in an ATP molecule.
Phosphate-phosphate bond hydrolysis occurs during the breakdown of an ATP molecule, which releases a significant amount of energy.
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A molecule with a trigonal bipyramidal electron geometry must have a central atom with how many bonding and nonbonding electron groups around it?
A molecule with a trigonal bipyramidal electron geometry must have a central atom with how many bonding and nonbonding electron groups around it Equatorial.
An atom is a single neutral particle. A molecule is a neutral particle with two or more atoms bonded together. Water is a simple molecule consisting of one oxygen atom bonded to two different hydrogen atoms. The bond is a polar covalent bond (polar bond) due to the high electronegativity of the oxygen atom.
About 99% of the body consists of atoms of hydrogen, carbon, nitrogen, and oxygen. It also contains much smaller amounts of other elements necessary for life. Something like table salt (NaCl) is a compound because it is made up of multiple elements (sodium and chlorine), but it is not a molecule because the bonds that hold NaCl together are ionic bonds.
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