As (arsenic) has the electrical configuration shown below.
This suggests that option b) is the appropriate response.
How can people consume arsenic?
Drinking water is most likely how people get exposed to inorganic arsenic. This is especially true in regions where inorganic arsenic levels in water sources are greater by nature. Inorganic arsenic can also be ingested through some meals, like rice and some fruit juices.
What is the purpose of arsenic?
Currently, gallium arsenide and arsine gas are two common forms of arsenic employed in the electronics industry as semiconductor device components. More than 90% of domestic arsenic trioxide use in 2003 was attributed to the production of wood preservatives, particularly copper chromated arsenate (CCA).
Is arsenic a poison or a drug?
Arsenic (As) is frequently referred to as a poison. Few individuals are aware that As has also been utilized extensively in medicine. For the treatment of conditions like diabetes, psoriasis, syphilis, skin ulcers, and joint problems, As and its compounds have been utilized as medication in the past.
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how many σ and π bonds are present in a molecule of cumulene? (figure 1)
Three double bonds and four single bonds, or 3(+)+4=7+3, are present in cumulene.
Sigma bond between the hydrogen and carbon on the end-side of the cumulene is visible. Carbon and hydrogen are linked by a total of four sigma bonds. Carbon is joined to carbon in the center by 3 sigma bonds and 3 pi bonds. Cumulene now has a total of 7 sigma bonds and 3 pi bonds. A cumulene is a molecule in organic chemistry that has three or more cumulative (consecutive) double bonds. sp2 hybrid orbital of C overlapping with 2p orbital of O and one bond make up the bond.
In the case of compounds with two bonds, one bond is a sigma bond and the other is a pi bond. A triple bond indicates that the chemicals.
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9 The correct name for the compound Pb3(PO4)4 is (abzi 2) Lead (IV) phosphide Lead phosphide lead monophosphours lead (IV) phosphate
The correct name for the compound Pb3(PO4)4 is lead (IV) phosphate. Chemical substances known as compounds are made up of two or more elements that are chemically bonded together in a certain proportion.
A compound is created when two or more components join chemically in a predetermined mass ratio. A compound is a substance made up of two or more different types of elements together in a specific proportion of their atoms. Some of the particular qualities of the constituent parts are lost during fusion, while the newly created molecule acquires new characteristics. Chemical Formula: The chemical formula identifies a compound. The ratios of atoms that make up a certain chemical molecule are symbolically represented in a chemical formula. Water's chemical formula, H2O, indicates that one molecule of water is made up of two hydrogen atoms and one oxygen atom. One sodium atom and one chlorine atom unite to make a single molecule of common salt, as shown by its chemical formula, NaCl. Salts and molecular compounds are the two categories into which compounds can be divided. Covalent bonds hold the atoms together in molecular molecules. Ionic bonds hold it together in salts.
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True or False: Polypeptides inside the ER are usually smaller than polypeptides synthesized from the same mRNA that have not entered the ER.
True. For these before leaving the ER undergo a process called N-terminal signal peptide cleavage. During this process, the signal peptide, which is an amino acid sequence that helps guide the protein into the ER, is cleaved, resulting in a smaller polypeptide.
What are Polypeptides?Polypeptides are composed of a variety of different amino acids that are linked together in a sequence. This sequence of amino acids determines the structure and function of the protein that they make up. Polypeptides are essential components of cells, playing a role in many essential processes, including:
MetabolismSignalingGene expressionThey are found in the cytoplasm and nucleus of cells, as well as in extracellular fluid. Polypeptides are also important components of:
HormonesEnzymesAntibodiesLearn more about The Polypeptides:
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Which component is not directly involved in the process known as translation?
(a)Ribosomes
(b)tRNA
(c)DNA
(d)mRNA
Option (c) DNA is not directly involved in the process known as translation.
The process translation is the process of polymerization of amino acids to form a polypeptide. The order and sequence of amino acids are defined by the sequence of bases in the mRNA. The amino acids are joined by a bond which is known as a peptide bond. Formation of a peptide bond requires energy. Therefore, in the first phase itself, amino acids are activated in the presence of ATP and linked to their cognate tRNA- a process commonly called as charging of tRNA or aminoacylation of tRNA to be more specific. Translation begins when small subunit encounters an mRNA.
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calculate the concentration of an h3po4 solution if 25.00 ml is converted to na2hpo4 by 39.13 ml of 2.000 m naoh solution.
The concentration of an H₃PO₄ solution if 25.00 ml is converted to Na₂HPO₄ by 39.13 ml of 2.000 m NaOH solution is 3.12 M.
given that :
Concentration M1 = 2.00 M
volume V1 = 39.13 mL
Volume V2 = 25 mL
Concentration M2 = ?
concentration = moles / volume in L
moles = concentration × volume in L
moles = 2 × 0.03913
moles = 0.0782 mol
Concentration of H₃PO₄ = moles / volume in L
Concentration of H₃PO = 0.0782 / 0.025
Concentration of H₃PO₄ = 3.12 M
Thus, the concentration of an H₃PO₄ solution is 3.12 M
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which of the following statements correctly describe bonding and intermolecular forces? select all that apply.
Intermolecular forces involve partial or small charges that are far apart and are relatively weak.
Bonding forces occur within the nucleus of the atom and are therefore strong
Covalent bonds are a type of intermolecular force since they are found in molecules.
Bonding forces are generally much stronger than intermolecular forces.
For a molecular substance, the strength of the intermolecular forces determines the physical properties of its phases.
Bonding forces are stronger than intermolecular forces, for molecular substance, strength of the intermolecular forces determines physical properties of phases, Intermolecular forces involve partial or small charges that are far apart and are relatively weak.
What can be said about the bonding and intermolecular forces?Intermolecular force is the force that mediates interaction between molecules including electromagnetic forces of attraction or repulsion which acts between atoms and neighboring particles (atoms or ions).
Bonding forces are the forces of attraction or repulsion which acts between neighboring particles like atoms, molecules or ions. Bonding force determines the elastic modulus (Young's modulus) of a material.
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Balance the following redox reaction under acidic aqueous conditions using the smallest whole-number coefficients possible. On which side does H (aq) appear, and what is its coefficient? 79. MnO4(aq)+(aą) 1(aq) +Mn2 (aq) a. left, 16 b. right, 16 c. left, 8 d. right, 8 e. right, 4
H+ appear on left hand side and the coefficient is 16 in the balanced redox reaction under acidic aqueous conditions.
What is redox reaction?
Redox reactions, also referred to as oxidation-reduction processes, are reactions in which electrons are transferred from one species to another. An oxidized species is one that has lost electrons, whereas a reduced species has gained electrons.
The balanced redox reaction under acidic aqueous conditions using the smallest whole-number coefficients is written as
[tex]2MnO+16H^{+} +10I^{-}[/tex] → [tex]2Mn2^{+} + 8H_{2} O + 5I^{2}[/tex]
Therefore, the H+ is present on left side with a coefficient of 16 in the balanced redox reaction under acidic aqueous conditions.
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how would you make 1 liter of an aqueous solution with a 0.50 m concentration of a compound that has a molecular weight of 200 grams? explanation
Hence 3.011*10²³ molecules are present in 1 liter of solution .
Molecular weight of compound = 200 grams
molecular weight of compound is weight of 1 M concentration of compound .
1M conc of compound has = 200 grams
molecular weight .
0.5 conc of compound has molecular weight = 200gram/2 = 100 gram
Hence 0.5 conc of compound means 100 gram of compound
As it is an aquous solution , thus means in order to make 1 liter 100gm of compound has to be added to 1000 ml of water to make 1 liter.
This means 100 gram of compound and add water until volume is 1 liter
In order to calculate number of molecules
No of molecules = Number of moles * avogardo constant
Avogardo constent = 6.022*10²³
as concentration of solution is 0.5 M
No of molecles = 0.5*6.022*10²³
= 3.011*10²³
Hence 3.011*10²³ molecules are present in 1 liter of solution .
A molecule is a group of two or more atoms held together by attractive forces known as chemical bonds. Depending on the context, the term may or may not include ions that meet this criterion.[4][5][6][7][8] In quantum physics, organic chemistry and biochemistry, ions The distinction between is removed and molecule is often used when referring to polyatomic ions.
Molecules can be isonuclear. H. Consists of atoms of chemical elements. Two atoms in the oxygen molecule (O2). Or it may be heteronuclear, which is a compound composed of multiple elements. Water (2 hydrogen atoms and 1 oxygen atom; H2O). In gas dynamics theory, the term molecule is often used for gas particles, regardless of their composition. This relaxes the requirement that molecules contain more than one atom, since noble gases are single atoms . Atoms and complexes held together by non-covalent interactions, such as hydrogen bonds and ionic bonds, are generally not considered single molecules.
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Elements from a family share similar properties. According to this, Beryllium and Magnesium:
a) are from different families.
b) don’t have similar characteristics.
c) have similar characteristics.
d) are from the same period.
e) One is a nonmetal and the other is an alkaline earth metal.
The elements of a family have the same characteristics. Based on this, Beryllium and Magnesium: have similar characteristics. Option c
What are the Characteristics of Beryllium and Magnesium?Three of the six elements that make up this group are beryllium, calcium, and magnesium. All of these elements share comparable exterior electronic structures, which accounts for their shared chemical and physical characteristics. Although they are all quite soft and glossy, they are nonetheless tougher than alkali metals.
Magnesium and beryllium are similar to aluminum in many ways. In the periodic table, this kind of diagonal resemblance is frequently referred to as a diagonal connection.
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What volume of carbon dioxide, measured at 25 °C and 741 torr, can be obtained by the reaction of 50.0 g of CaCO3 with 750 mL of 2.00M HCl solution?CaCO3(s) + HCl(aq) => CaCl2(aq) + CO2(g) + H2O(l) (unbalanced)
a.
11.2 L
b.
12.5 L
c.
18.8 L
d.
9.4 L
e.
6.25 L
The volume of carbon dioxide measured at 25 °C and 741 torr is 12.5L.
How is volume related to temperature?
The Charles' law concept was later updated by Joseph Gay-Lussac and generalized in 1802. At extremely high temperatures and low pressures, gases adhere to Charles' law. It can be obtained from the kinetic theory of gases under the assumption of an ideal gas and is a specific case of the general gas law.
The volume of a fixed mass of gas is linearly proportional to temperature at constant pressure.
"The volume of a fixed mass of a gas reduces when it is cooled and rises when the temperature is raised. The volume of the gas rises by 1/273 of its initial volume at 0 °C for every degree of temperature rise. Let Vo and Vt represent the gas's volumes at 0 C and t C, respectively.
The balanced equation is :
CaCO3(s) + 2HCl(aq) => CaCl2(aq) + CO2(g) + H2O(l)
50 g of CaCO3 × 1mole/100.1 g × 1 mol CO2 / 1 mol CaCO3 = 0.50 mol CO2
2.00 M HCl × 0.750 L/ 1mol × 1 mol CO2 / 2 mol HCl = 0.75 mol CO2
CaCO3 is the limiting reagent.
So, 0.50 mol CO2 will be produced.
V = 0.50 × 0.0821 L atm mol -1 K -1 ×(25+273) / 741 torr ×{ 1 atm /760 torr}
Volume = 12.5 L
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nuclear decay occurs according to first-order kinetics. a nuclide decays in 3.40 days from 45.0 g to 12.1 g. what is the rate constant for the nuclide?
Its rate constant again for nuclide is 0.388 days per one. First-order kinetics governs how nuclear decay happens. At 45.0 g down 12.1 g, a nuclide degrades every 3.40 days.
How do you define a nuclide?Nuclide, also known as nuclear species, is an atom species that is identified by the amount of protons, neutrons, and the energetic state of the nucleus. As a result, a nuclide is identified by its quantity (A) and atomic number (Z).
What is an example of a nuclide?A similar options is a type of atom that has a certain ratio of protons to neutrons in its nucleus, such as carbon-13's 6 protons to 7 neutrons.
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Silk is a natural fiber produced by the silkworm. How is silk produced by the body of the silkworm?
The cocoon that the Bombyx mori caterpillar spins yields silk. The thread fibers are secreted from the caterpillar's mouth, where they are spun into a cocoon.
Silk strands are used in the creation of cocoons by silkworms.
Proteins called sericin and fibroin, which are synthesized in the silk gland and released through a spinneret at the larvae's head, make up these threads.
To produce silk fiber, one thread is chosen from the cocoon and unraveled.
Mulberry leaves are used to feed the silkworm larvae during this phase, and following their fourth moult, they climb a nearby twig to spin their silken cocoons.
After treating the cocoon with boiling water, the silk is tenderly unraveled from the cocoon. 10 kilogram or so of cocoon produces 1 kg of silk.
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which of the following is true about the total entropy of the universe? a) it is always increasing b) it is always decreasing c) it remains constant at a given t d) it always remains constant
The total amount of entropy in the universe is constantly increasing because energy never flows in the opposite direction. So, option A is correct .
Entropy is a measure of a system's unpredictability or disorder, according to its definition.
Entropy rises as a result of the constant downward flow of energy. Energy spreads as widely as it can, and entropy is the dispersion of energy. It moves independently from a hot (highly energetic) location to a chilly (lowly energetic).
As a result, energy is distributed equally across the two locations, and temperatures are the same in both. The identical procedure takes place on a much larger scale. Energy is released into the universe by all stars, including the Sun.
There won't be any warmer or cooler objects because the heat will have dispersed to the point where the stars eventually cool down. It will continue to be the extremely cold.
The overall entropy of the system rises. The total amount of entropy in the universe is constantly rising because energy never flows in the opposite direction.
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c. at what pressure is the breakdown voltage a minimum? d. what air gap spacing d at 1 atm gives the minimum breakdown voltage? e. what would be the reasons for preferring gaseous insulation over liquid or solid insulation?
a. The breakdown voltage of air is a function of pressure and air gap spacing.
b. The minimum breakdown voltage occurs when the applied voltage reaches a critical value, which depends on the pressure and air gap spacing.
c. The minimum breakdown voltage occurs at atmospheric pressure (1 atm).
d. The minimum breakdown voltage occurs when the air gap spacing is 1 mm.
e. Gaseous insulation is preferred over liquid or solid insulation because it is more reliable, has higher dielectric strength, and is less likely to become contaminated or corroded. Additionally, gaseous insulation can be used in a wider range of operating temperatures.
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if 70% of a radioactive element remains radioactive after 900 years, then what percent remains radioactive after 2000 years?
If 70% of a radioactive element remains radioactive after 900 years, then 28 percent remains radioactive after 2000 years.
Formula for exponential decay, which describes the percentage of a radioactive element that remains after a given time period. The formula is:
= P = P0 x e^(-lambda t)
where P is the percentage of the radioactive element that remains after a time period t, P0 is the initial percentage of the radioactive element, lambda is the decay constant for the element, and e is the base of the natural logarithm (approximately 2.718).
In this problem, you are given that P0 = 70% and t = 900 years. You want to solve for P at t = 2000 years.
Values into the formula and solving for P, we get:
= P = 70% x e^(-lambda x 2000 years)
= 70% x e^(-lambda x 900 years)
= 70% x 0.4
= 28%
Therefore, if 70% of a radioactive element remains radioactive after 900 years, then 28% remains radioactive after 2000 years.
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Fill in the blanks to match the appropriate phrases.
WORDS
K+ permeability
Membrane potential of -90 and mV
Membrane potential of -70mV
Na+ permeability
PHRASES
The point at which there is no net movement of K+ into or out of the cell
Since there are several open channels, the membrane is permeable to K+ when at rest. The equilibrium potentials for sodium (ENa) and potassium (ENa) are +60 mV and 90 mV, respectively.
The main determinant of the resting membrane potential is K+ permeability. The permeability of Na+ Although it contributes, the resting membrane potential is not primarily determined by this factor.-70 mV membrane potential: The cell's resting membrane potential-90 mV membrane potential: the time when neither a net inflow nor an outflow of K + occurs in the cell.The membrane is more permeable to potassium than sodium while it is at rest because significantly more potassium channels are open than sodium channels.
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What reaction does a vitamin KH2-dependent enzyme catalyze? View Available Hint(s) O It decarboxylates the y-carbon of a glutamate side chain. O It carboxylates the y-carbon of an aspartate side chain. O It carboxylates the ycarbon of a glutamate side chain. O It carboxylates the ycarbon of a glutamine side chain. O It carboxylates the P-carbon of a glutamate side chain. Submit PartQ CoASH is used to activate carboxylic acids. What type of compound is formed between CoASH and a carboxylic acid? View Available Hint(s) O anhydride O thioether O amide O thioester O mixed anhydride with phosphate Submit ▼ Part H What role does ATP play in biotin-dependent enzymes? O It puts a good leaving group on bicarbonate. O It provides a strong base. O It provides a strong nucleophile. It delocalizes electrons It reduces bicarbonate. Submit Request Answer Part F TPP is the coenzyme required by pyruvate decarboxylase. What product is formed in that reaction? View Avallable Hint(s) O acetaldehyde O butanal O formaldehyde O acetone O propanal Submit
Part Q: The compound formed when CoASH is used to activate a carboxylic acid is a thioester.
Thioesters are formed when the carboxyl group of the carboxylic acid reacts with the sulfhydryl group of CoASH. The reaction results in the formation of a thioester, a compound containing a carbon-sulfur bond.
Part H: ATP plays an important role in biotin-dependent enzymes. It provides the energy necessary to drive the reaction of biotin-dependent enzymes by donating a high-energy phosphate group to the substrate. This energy transfer results in the formation of a new product, as well as the release of the phosphate group, which serves as a good leaving group.
Part F: The product formed when pyruvate decarboxylase is activated by TPP is acetaldehyde. Pyruvate decarboxylase catalyzes the decarboxylation of pyruvate to form acetaldehyde. TPP serves as a coenzyme, allowing the reaction to occur by providing a strong nucleophile. This nucleophile is then able to attack the pyruvate molecule and facilitate its decarboxylation to form acetaldehyde.
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what is the total volume of gaseous products formed when 38.4 liters of butane () react completely according to the following reaction? (all gases are at the same temperature and pressure.)
The total volume of gaseous products formed is 799.68 L.
The reaction is given as :
2C₄H₁₀(g) + 13O₂(g) ----> 8CO₂(g) + 10H₂O(g)
22.4 L volume is occupied = 1 mol
38.4 L volume is occupied = (1 / 22.4 ) × 38.4
= 1.7 mol
2 moles of C₄H₁₀ = 8 moles CO₂
1.7 mol of C₄H₁₀ = (8 / 2) 1.7
= 27.2 mol CO₂
volume of CO₂ at STP = 27.2 × 22.4
= 609.28 L
2 moles of C₄H₁₀ = 10 moles of H₂O
1.7 mol of C₄H₁₀ = ( 10 / 2) 1.7
= 8.5 mol of H₂O
volume of H₂O = 8.5 × 22.4
= 190.4 L
total volume of gaseous product = 609.28 + 190.4 = 799.68 L
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what is the molarity of the resulting sodium nitrate solution that forms when 50.0 ml of a 0.010m mercury(ii) nitrate solution reacts with a certain volume of a 0.10m sodium sulfide solution?
The molarity of the resulting solution formed by reaction of mercuric nitrate and sodium sulfide will be 0.002M.
We know that,
Molarity= Number of moles of solute/ Volume of solution in Liter
Calculating number of moles of mercury nitrate,
Firstly we calculate the no of moles of mercury nitrate -
Concentration of mercury nitrate given = 0.010 M
Volume of mercury nitrate given = 50 ml = 0.050 L.
moles = Concentration × Volume
moles of mercury nitrate = (0.010 M ) ×( 0.050 L) = 0.0005 moles
Now that,
Hg(NO₃)₂ + Na₂S ------> 2 NaNO₃ + HgS.
from the balanced chemical reaction-
1 mole of mercy nitrate gives 2 moles of the NaNO₃
moles of NaNO₃ produce = 2 × moles of the mercury nitrate.
moles of NaNO₃ produce = 2 × (0.00005 moles ) = 0.0001 moles.
Total volume of solution = 50 ml = 0.050 L
So, the Concentration of NaNO₃ = moles of NaNO₃ / Volume of NaNO₃ in litres.
Concentration of NaNO₃ = 0.0001 moles / 0.050 L = 0.002 M.
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for the chemical structure given below, identify the group of protons that is:
For the given chemical structure, the group of protons that is the most shielded is A, the least shielded is D, the most downfield is D, and the most upfield is A.
The shielding effect refers to reduction in the effective nuclear charge on the electron cloud, which results in a difference in the attraction forces on the electrons in the atom. The electron density is said to shield the proton in the nucleus from the external magnetic field by decreasing the net magnetic field that is experiences. Hence, a shielded proton has circulating electron density that creates a magnetic field that opposes the applied magnetic field. In the given structure, the groups of protons that are most shielded is A as it experiences weaker magnetic field and the least shielded is D as it experiences stronger magnetic field. The group of protons that is most downfield is D and the most upfield is A as upfield and downfield refer to the low and high energy.
Note: The question is incomplete. The complete question probably is: For the chemical structure given below, identify the group of protons that is: a) the most shielded b) the least shielded c) the most downfield d) the most upfield.
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how high must a column of water be to exert a pressure equal to that of a 760.0 mm column of mercury? (the density of water is 1.00 g/ml, whereas that of mercury is 13.6 g/ml). group of answer choices 29.92 inches 10.3 meters 760 mm 1.00 atm
To impose pressure equivalent to that of a 760.0 mm column of mercury, a column of water must be 10336mm tall, or 10.3m. Per unit area, pressure is the force exerted perpendicularly to an object's surface.
That force is dispersed across. The gauge pressure, also known as gauge pressure, is the pressure in relation to the surrounding air pressure. To express pressure, a variety of units are employed. Mercury is the smallest and sun-closest planet in the solar system. The quickest of all the planets that orbit the Sun, its orbit lasts 87.97 Earth days.
76*13.6*g = h*1*g
h = 76*13.6 = 10.3m
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A coin collector has a bag of 50
pennies. What is weighted average
of a penny in the sample according
to the data?
Sample
Pre-1982
Post-1982
Abundance
(%)
36
64
Mass (g)
3.1
2.5
Weighted
Average (g)
[?]
The weighted average mass of the pennies is 2.716 g.
What is the average mass of a substance?The average mass of a substance is the average of the sum of the masses of all the substances.
Average mass = sum of all the masses / number of masses
The average mass is also known as the weighted average of the mass of a substance.
The average mass of a substance is used to express the average of al ]l the masses of a substance that occur in nature.
The average mass of the given pennies is calculated below as follows:
Sample A:
mass of sample = 3.1 g
percentage abundance = 36 %
Sample B:
mass of sample = 2.5 g
percentage abundance = 6 36 %
Weighted average mass = mass of A * % abundance + mass of B * % abundanceWeighted average mass = 3.1 g * 36% + 2.5 * 64%
Weighted average mass = 2.716 g
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Predict the charge that a strontium ion would have.O 2- O 1+O 2+ O 4- O 6-
The charge that are Strontium ion would have is +2.
The atomic number of Strontium atom is 38. Strontium is a metal that burns in air and reacts with water.
The electronic configuration of the Strontium atom is [Kr]2s².
The Strontium atom has two electrons in the outermost 5s orbital.
Show the electronic configuration of the strontium ion will be Sr(+2).
When is Strontium acquires and ionic state the two electrons from the outermost 5S orbital jump out.
Because this outermost orbital has the highest potential energy.
So, where we can say that the charge on the Strontium ion will be 2+.
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draw the carboxylic acid product of the acid hydrolysis of methanamide, shown here.
The hydrolysis of the amide will give carboxylic acid and amine.
the reaction will occur in presence of acid
A carboxyl functional group is found in an organic molecule known as a carboxylic acid. Both in nature and man-made synthetically, they are extensively present. Deprotonation of carboxylic acids results in the formation of a carboxylate anion with the general formula R-COO-, which can result in a number of useful salts, including soaps.
A carboxylic acid is an organic acid in organic chemistry that has a carboxyl group joined to an R-group. An alkyl, alkenyl, aryl, or other group is denoted by the prefix R in the usual formula of a carboxylic acid, which is RCOOH or RCO2H. There are numerous carboxylic acids.
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what is the apparent weight of a 1.2 g drop of water?
The answer to the question is 4.62 N, which is the actual weight of the a 1.2 g bit of water.
What sorts of water are there in chemistry?Water has two isomers, or forms, at this molecular level. In one isomer compared to the other, the two atoms atoms that comprise freshwater spin in a distinct relative position. The spins are now either referred to as ortho- or para-water, depending on their orientation.
Briefing:N = 1250 revolutions per minute
45 cm in diameter, D
r = Radius = d/2 = 45/2 = 22.5 cm
M = Mass of drop = 1.2 g
Angular speed of the water
ω = 2*π*N/60
ω = 2*π*1250/60
ω = 130.89 rad/s
Apparent weight is given by
[tex]W_{a}[/tex] = Mω²R
[tex]W_{a}[/tex] = 1.2*10⁻³*130.89²*0.225
[tex]W_{a}[/tex] = 4.62 N
A 1.2 g single drop appears to weigh 4.62 N.
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The complete question is-
The spin cycle of a clothes washer extracts the water in clothing by greatly increasing the water's apparent weight so that it is efficiently squeezed through the clothes and out the holes in the drum. In a top loader's spin cycle, the 45-cm-diameter drum spins at 1250 rpm around a vertical axis.
What is the apparent weight of a 1.2 g drop of water?
the electron-group arrangement around a central atom is defined by the number of –electron groups. the molecular shape is defined by the relative positions of the around the central atom. two species may have the same electron-group arrangement but have different molecular shapes.
The electron-group arrangement of two species could be identical. Valence Atoms can take on several molecular forms.
Why does an atom have a valence?The electrons located in an atom's outermost shell, or energy level, are known as valence electrons. For instance, oxygen contains two valence electrons in the 2s subshell and four in the 2p subshell, for a total of six valence electrons. The oxygen's valence electron configuration is 2s22p4.
What is the best way to determine an atom's valence?The quantity of valence electrons for neutral atoms is equal to the number of the primary group of the atom. From an element's column on the periodic table, one can determine the major group number. In group 4 and with 4 valence electrons, for instance, is carbon.
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a solution is prepared by dissolving 0.23 mol of hypochlorous acid and 0.27 mol of sodium hypochlorite in water sufficient to yield 1.00 l of solution. the addition of 0.05 mol of hcl to this buffer solution causes the ph to drop slightly. the ph does not decrease drastically because the hcl reacts with the present in the buffer solution. the ka of hypochlorous acid is 1.36 x 10-3. group of answer choices hydronium ion water hypochlorite ion this is a buffer solution: the ph does not change upon addition of acid or base. hypochlorous acid
The pH does not decrease drastically because the HCl reacts with the hypochlorite ion present in the buffer solution.
The hypochlorous acid , HClO is the weak acid . the ka of the HClO is 1.36 × 10⁻³. the conjugate base is ClO⁻ form the sodium hypochlorite , NaClO, this solution is called as the buffer solution . when we add the HCl which is a strong acid , the reaction which occurs is given as follows :
HCl + ClO⁻ ----> HClO + Cl⁻
so, it is clear from the above equation that if we add the HCl in to the solution then the HCl react with the hypochlorite ion that is present in the solution. the pH does not decreases drastically.
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Identifying hydrogen-bonding interactions between molecules For each compound in the table below decide whether there would be any hydrogen-bonding of the compound and molecules of water compound hydrogen-bonding force Betwcen Between molecules of the compound and molecules of water? name formula or Lewis structure molecules of the compound? ves yes fluoromethane CH,F yes ves methanimine H _ =it yes hydrogen fluoride
For a hydrogen bond to develop, both a hydrogen donor and acceptor must be present.
Lewis dot structures, Lewis dot formulas, Lewis electron dot structures, or any other variation (LEDS)
What is Lewis structure for NH3?The nitrogen atom at the center of the Lewis structure of ammonia, NH3, would be surrounded by three hydrogen bonds and have a single pair of electrons on top. Here is Ammonia's ability to give those electrons is the reason why it functions as a Lewis base.
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what effect do you expect to see when you increase the concentration of substrate in an enzyme-catalyzed reaction while holding the amount of enzyme constant?
No effect on the rate of reaction, as the available enzymes will be saturated and working at their maximum rate.
What is Enzyme ?
Compounds are proteins that assist with accelerating substance responses in our bodies. Catalysts are fundamental for processing, liver capability and considerably more. To an extreme or excessively tad of a specific chemical can cause medical conditions. Catalysts in our blood can likewise assist medical services suppliers with checking for wounds and illnesses.
Compounds are proteins that assist with accelerating digestion, or the substance responses in our bodies. They fabricate a few substances and separate others. All living things have compounds.
Our bodies normally produce catalysts. Be that as it may, proteins are additionally in made items and food.
One of the main jobs of catalysts is to support processing. Assimilation is the most common way of transforming the food we eat into energy. For instance, there are catalysts in our spit, pancreas, digestive organs and stomach. They separate fats, proteins and carbs. Proteins utilize these supplements for development and cell fix.
Substrate focus: Expanding substrate fixation likewise builds the pace of response somewhat. When every one of the chemicals have bound, any substrate increment will affect the pace of response, as the accessible proteins will be immersed and working at their most extreme rate.
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classify each of the following diatomic species as ionic, polar covalent or nonpolar covalent.
Answer:
1. O2
The oxygen molecule is a non-polar covalent molecule. It is formed by sharing of electrons. As the molecule is symmetric, the electrons are pulled by both the atoms in an equal amount.
2. CaO:
The association of two ions forms calcium oxide. The ions are calcium ion and oxide ion. Such a compound is called an ionic compound.
3. Br2:
Bromine molecule contains a non-polar covalent bond because both the atoms share an equal number of electrons, and it is symmetric.
4. HBr:
Hydrogen bromide is a polar covalent compound. It is an asymmetric charge between hydrogen and bromine. Bromine being more electronegative, tends to pull the electron itself.
