Atomic elements with the same proton number are called isotopes. Ru will have an atomic number of 44 and a mass of 100.9 according to the periodic table.
What are atomic weight and number?The number of protons in an atom's nucleus is indicated by its atomic number. The total number of protons and neutrons in an atom makes up the atomic mass.
The atomic number, which is the total amount of protons for a certain element throughout all locations or planets, is constant. Ruthenium will therefore have an atomic number of 44.
The relative abundance determines the atomic mass, which is determined as follows:
Atomic mass = [tex]\sum[/tex] (relative abundance × atomic mass) of each isotope
Atomic mass = (96% × 100.91) +(4% × 101.90)
Atomic mass = 100.9%
Ru's atomic mass is therefore 100.9 and its atomic number is 44.
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What happens to the volume of the gas being measured (o2 consumption or co2 production) when the temperature or pressure changes during the experiment?.
Volume rises when temperature rises and pressure decreases, and vice versa. A gas's volume is inversely correlated with its temperature and inversely correlated with its volume.
Why not explain the gas law?Regulations governing how a gas's volume, pressure, and temperature are related Robert Boyle's law, which asserts that a gas's pressure P changes inversely with its volume V at constant temperature, or PV = k, where k is a constant, is known as the Boyle law.
A fixed temperature prevents any change in the internal energy of an ideal gas since the internal energy is proportional to temperature. As a result, the first law, which deals with variations in internal energy, becomes 0 = Q - W, resulting in Q = W.
When a gas is held at a constant temperature, its volume is inversely proportional to the pressure at which it is measured.
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Which of the following can contain more than two valence electrons in its outer most shell?
O Helium
O Hydrogen
O Zinc
O Oxygen
the ionization energy of o2 is 1205 kj/mol. what is the maximum wavelength of light capale of causing the ionization of o2?
O2 can only be ionized by light with a maximum wavelength of 99.39 nm.
What is ionization energy?The ionization energy measures an element's ability to participate in chemical processes that call for the creation of ions or the donation of electrons.
ionization energy of O2 = 1205 kJ
energy = hv
= h × wavelength/speed of light
wavelength = 1205000× 3 ×10⁸ /6.626 ×10³⁴
wavelength = 99.39 nm.
He is symbolized by the highest ionization energy. The outermost shell has a high ionization energy, is stable, and does not frequently become unstable due to electron loss. Ionization can be induced by waves with energies greater than 134 nm. 225nm light lacks the energy to ionize gold because it is greater than 134nm.
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Help me out asp please
Predict the products of the reaction below. That is, complete the right-hand side of the chemical equation. Be sure your equation is balanced. HI+NaOH => ________
Decide what the reaction's byproducts will be. In other words, finish the right hand side of a chemical formula. A balanced equation is a must NaOH + HI = H2O + NaI.
What does it mean by reaction?Resistance in resistance to a power, influence, or movement is a reactionary act, process, or occurrence. especially: a reaction to a particular treatment, circumstance, or stimulus; leaning toward a past and typically antiquated political or social system or policy.
What is a physical reaction?A physical response is a reaction that modifies the physical characteristics of an item or material Physical characteristics include things like mass, volume, and density. The definition of a physical reaction is a response in which molecules rearrange one another but do not undergo chemical change.
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Match these items.
1. splitting/dividing
radioactive
2. joining together
beta rays
3. release of atomic particles
fusion
4. high-energy light
plasma
5. helium nuclei
fission
6. electrons
alpha rays
7. ions and free electrons
gamma rays
Answer:
1- fission
2- fusion
3- radioactive decay
4- gamma
5- alpha particle
6(high speed electron)- beta rays
7-plasma
The field of chemistry had incredible advancements in a very short time period, from the mid-1800s to the early 1900s. It was during this time period that the scientific community saw the need for the regulation of the growing number of chemical discoveries. What were the early committees trying to regulate?.
Earlier the committees were trying to regulate the naming of the discovered elements.
The elements, their properties, and other information relating to them were so chaotic prior to the regulations being applied to the area of chemistry that it was slowing down advancement.
Therefore, in order to be used more effectively, the committees decided to govern things like the names of any newly found elements and whatever attributes they may have.
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Which isotopic ration needs to be determined when the age of ancient wooden objects is investigated?.
When the age of ancient wooden objects is investigated then the ratio of U-238/PB-206 isotopic ratio needs to be investigated.
What is isotopic ratio and which of the same needs to be determined when the age of ancient wooden objects is investigated?Isotopic ratio refers to the atomic abundancies of two isotopes of same element of any nature.Here the question is asked of the isotopic ratio needs to be determined when the age of ancient wooden object is investigated.The correct answer would be the ratio of U-238/PB-206 needs to be investigated of wooden objects.Isotopic ratios are so important in laboratories and other chemical phenomena to differentiate between samples which otherwise share same chemical formula.Isotopic ratio finds to be essential in chemistry life and also provides information on origin of humic substances.To know more about ratio visit:
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which of the following compounds do you anticipate would have the longest bond? a) h-f b) h-cl c) h-br d) h-i
The following compounds do anticipate would have the longest bond is H - I.
The given compounds are the halogen halides. if we move down the group the electronegativity decreases and the bond becomes weaker. H - F is the strongest in all the given hydrogen halides. If the bond length is shorter the bond is much much stronger. The bond length is longest this means the bond is weaker.
bond length ∝ 1 / bond order
bond length ∝ stable
so, the weaker the bond , the longest the bond length.
Thus, The following compounds do anticipate would have the longest bond is H - I.
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Identify
the property of the components that makes it possible to use distillation to
separate the 2-propanol from water.
Distillation is a method of separating mixtures, which is based on difference in the volatility of a boiling liquid mixture. The property of a component which separates the 2-propanol from the water is a boiling point.
In the distillation method, the two components are separated based on their different boiling points. For example, in the mixture of 2-propanol and water, propanol has less boiling point than the water, which is 82.5°C. So when we apply heat to the mixture, 2-propanol is separated in the form of vapour and it is immediately cooled by the action of cold water in a condenser. The another examples of distillation method is purification of alcohol, separation of gasoline from crude oil etc.
Therefore, the property of the components that makes it possible to use distillation to separate the 2-propanol from water is boiling point.
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The element Chromium has 4 naturally occurring isotopes. Use the relative abundance of each to calculate the average atomic mass of chromium. (Must show work!)
Cr-50 = 4.34%, Cr-52 = 83.79%, Cr-53 = 9.50%, Cr-54 = 2.37%
According to the given statement The average Cr atomic mass unit is 51.9963 amu.
What defines the atomic mass?A single atom's atomic mass is only its total mass, and it is usually given in atomic mass units, or amu. A carbon atom with six neutrons, or helping students learn, has an atomic mass of Twelve amu by definition.
Do elements have atomic mass?The entire weight of one atom in an element is referred to as its atomic mass. The atomic mass is its average atomic mass given in atomic mass units (amu, also known as daltons, D). Atomic weight is another name for the atomic number.
Briefing:Chromium exists in four isotopes that are naturally occurring: 50Cr (atomic mass: 49.9460 amu), 52Cr (atomic mass: 51.9405 amu), 53Cr (atomic mass: 52.9407 amu), and 54Cr (atomic mass: 2.37% amu).
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a solution of enzyme a has a ph of 888. based on the graph, which ph change would result in higher enzyme activity?
A solution of enzyme a has a pH of 8. based on the graph, pH change would result in higher enzyme activity is by decreasing the pH value to 6.
The enzymes are also called as protein. the very low pH and the very high pH lead to decrease the enzyme activity. At optimal pH value the enzyme activity is at higher. The optimal temperature reference range id from 4 to 6 called as optimal pH at the optimal pH enzyme would result in higher activity.
Thus, A solution of enzyme a has a pH of 8. based on the graph, pH change would result in higher enzyme activity is by decreasing the pH value to 6.
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the largest magnetic quantum number (m or ml) of an atom in the ground state is found to be 6. what must be the largest principal quantum number (n)?
The magnetic quantum number (m or ml) of an atom in the ground state is found to be 6. The largest principal quantum number of that atom is 4.
The magnetic quantum number(ml) of an atom determines the number of orbitals and the orientation present in the atom. To find out principal quantum number, first we need to find out the angular quantum number, which is l. It is calculated by the formula
m or ml=(2l+1)
The value of ml is 6. Plug the value in the formula
6=(2l+1)
2l=6-1
2l=5
l=5/2
If we round off this value to the nearest integer, then the value is 6/2 which is equal to 3.
When l=3, then the value of principal quantum number is calculated using the formula
l=n-1
Rearrange the formula for n and solve for n
n=l+1
n=3+1
n=4
Hence, the value of n is 4.
Therefore, the largest principal quantum number of the atom is 4.
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Which of the following factors affect the magnitude of the lattice energy for an ionic compound? Select all that apply.
a. The charges of the ions
b. The arrangement of the ions in the crystal
c. The size of the ions
The charges and size of the ions affect the magnitude of the lattice energy for an ionic compound. Therefore, option (a) and (c) is correct.
What is the lattice energy?Lattice energy can be described as the heat of formation when 1 mole of a crystalline ionic compound is produced from its constituent ions in their gaseous state.
For example, the lattice energy of a NaCl compound is the energy change of reaction when Na⁺ ions and Cl⁻ ions react to generate a NaCl crystal, which is -786 kJ/mol.
At constant pressure, the relation between lattice energy and lattice enthalpy is given by:
ΔU (lattice) = ΔH (lattice)- PΔV
Lattice energy for an ionic compound is directly proportional to the charge on ions and inversely proportional to the interionic distance between ions or the size of the ions.
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What is the estimated effective nuclear charge, zeff, experienced by an electron in a 3p orbital of a chlorine atom?.
The estimated effective nuclear charge experienced by a 3 p electron of chlorine is 6.1.
It is the charge felt by any many-electron atom's outermost valence electrons. This is accomplished by taking into account the quantity of shielding electrons surrounding the nucleus.
It is used to assess the actual nuclear charge that an electron in a multi-electron atom experiences. This rule states that an electron's actual nuclear charge is less than its actual nuclear charge because of screening by other electrons in the atom.
The arrangement of an atom's electrons in its atomic orbitals is known as its electronic configuration. J. J. Thompson made the discovery of the electron. J. J. Thompson made the electron discovery in 1887. Every atom consists of a hefty nucleus that is encircled by electrons.
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The trend towards smaller atomic radii as one moves to the right in a period is _____.
The periodic table has a variety of different elements. Some substances are radioactive, some are dangerous, and some are noble gases.
what is the periodic table?The term "periodic table" refers to a table where elements having characteristics such as metals, non-metals, metalloids, and radioactive elements are arranged in increasing atomic number.
Atomic radii drop as we move from left to right in the periodic table due to an increase in effective nuclear charge. Only the number of electrons grows, increasing the number of protons in the nucleus and, consequently, the effective nuclear charge of the atom, which causes the size of the atom to decrease. There is no increase in the number of shells.
Consequently, there is a tendency for atomic radii to decrease as one proceeds to the right is caused by the effective nuclear charge growing over time.
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a balloon is filled with co2 at 1.0 atm. if the balloon is placed at the bottom of the pool of water where the pressure is 2.0 atm, what will happen to the volume?
If the balloon is placed at the bottom of pool of water where pressure is 2.0 atmospheres, the volume of carbon dioxide in balloon will decrease as pressure and volume are inversely proportional.
What is pressure?Pressure is defined as the force applied on an object perpendicular to it's surface per unit area over which it is distributed.Gauge pressure is a pressure which is related with the ambient pressure.
There are various units by which pressure is expressed most of which are derived units which are obtained from unit of force divided by unit of area . The SI unit of pressure is pascal .
It is a scalar quantity which is related to the vector area element with a normal force acting on it.It is distributed over solid boundaries and across arbitary sections of fluid normal to the boundaries at every point.
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Calcium phosphate is widely found in nature in the form of natural minerals. It is also found in bones and some kidney stones. In one case a sample is found to contain 0.256 moles of phosphorus. How many moles of Ca3(PO4)2 are in that sample?
Answer:
There are 1.024 moles of Ca3(PO4)2 in the sample.
Explanation:
Based on the parameters set forth in your lab procedure, what is the ph you should observe when you added the hcl to water?.
The pH of acid is less than 7 and that of water is 7. HCl is a strong acid and it have a pH of about 3. If we add HCl into water, the acidity of water increases and its pH becomes less in arrange of 4-5.
What is pH?pH of a substance is the measure of its acidity of basicity. It is the measure of H+ concentration in the solution. Mathematically it is equal to negative logarithm of H+ ions concentration.
If a solution has a pH below 7 it is acidic and if it is more than 7 the solution is basic. Acids are having more H+ ions and thus having lower pH. Hydrochloric acid is a strong acid and have a pH in range of 2-3.
Water is neutral. If any acid is added to water it turns to acidic pH. Hence if HCl is added to water, then the pH of water turn to 3-5 based on the concentration of acid.
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what a substance was dissolved in water, the temperature of the water increases. this process is described as
This process is described as exothermic, with the release of energy.
Temperature is a bodily amount that expresses quantitatively the perceptions of hotness and coldness. Temperature is measured with a thermometer. Thermometers are calibrated in various temperature scales that historically have trusted diverse reference points and thermometric substances for definition.
Temperature performs a essential function in hospital treatment (each human beings and animals), meals, liquids, and agriculture. Our common health is frequently reliant upon temperature in many approaches as nicely. Retaining right temperature levels in clinical bloodless garage areas is vital.
Air temperature is measured by thermometers. Not unusual thermometers encompass a pitcher rod with a completely skinny tube in it. The tube contains a liquid this is furnished from a reservoir, or "bulb," at the base of the thermometer.
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in a solution that is 90% ethyl alcohol and 10% water, the solute is and the solvent is . g
In a solution that is 90% ethyl alcohol and 10% water, the solute is 10 g and the solvent is 90 g.
given that :
The solute in the solution by mass percent = 10 %
mass percent = ( mass of solute / mass of solution ) × 100%
mass of solute in the solution is = 10 g
The solvent present in solution by mass percent = 90 %
the mass of solvent in the solution is is 90 g
Thus, In a solution that is 90% ethyl alcohol and 10% water, the solute is 10 g and the solvent is 90 g.
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Draw the lewis structure (including resonance structures) for methyl azide (ch3n3).
While the N atom coupled to just one (1) Nitrogen atom has a - formal charge, the N atom bound to two (2) Nitrogen atoms has a + formal charge.
How is a Lewis structure composed?Determine the total number of valence electrons in step 1. Write down the molecule's skeleton in step two. In the third step, each bond in the skeleton structure is formed using two valence electrons. Step 4: Make an effort to fill the atoms' octets by assigning the leftover valence electrons to nonbonding positions.
CH₃N₃ typically has two resonance configurations.
The N atom has a + formal charge when it is bound to two Nitrogen atoms, whereas it has a - formal charge when it is connected to only one Nitrogen atom in both forms.
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Write the balanced ka and kb reactions for hso−3 in water. Include physical states for each species.
HSO⁻³ is an amphoteric substance (in this reactions is ion that can react both as an acid and as a base).
What is dissociation constant?The law of mass action, which defines equilibria in a more comprehensive fashion, has an immediate consequence called the dissociation constant. When speaking of salts, the ionization constant is another name for the dissociation constant. The term "association constant" refers to the inverse of the dissociation constant.
Kb is short for base dissociation constant. It is explained as the degree of base dissociation in solution.
Acid dissociation constant is referred to as Ka. It displays the degree of dissociation of an acid in a solution.
When HSO₃⁻ acts as acid, it gives protons to water:
HSO₃⁻(aq) + H₂O(l) ⇄SO₄²⁻(aq) + H₃O⁺(aq).
Ka = [SO₄²⁻] · [H₃O⁺] / [HSO₃⁻].
When HSO₃⁻ acts as base, it accepts protons from water:
HSO₃⁻(aq) + H₂O(l) ⇄ H₂SO₄(aq) + OH⁻(aq).
Kb = [H₂SO₄] · [OH⁻] / [HSO₃⁻].
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a 25.0 ml aliquot of an aqueous quinine solution was diluted to 50.0 ml and found to have an absorbance of 0.528 at 348 nm when measured in a 1.00 cm cell. a second 25.0 ml aliquot was spiked with 10.00 ml of a 23.4 ppm quinine standard. after dilution to 50.0 ml, this solution had an absorbance of 0.610 at 348 nm in the same 1.00 cm cell. calculate the concentration of quinine in the sample in ppm.
The concentration of quinine in the sample is 60.26 ppm.
This problem can be calculated as:
The volume of aqueous quinine solution: V1 = 25 ml
Volume of this sol. after dilution: V2 = 50 ml
Absorbance of this solution: A1: .528
The volume of another quinine solution: V2: 25 ml
Volume of this solution mixed: V3: 10 ml
Concentration of quinine in this sample: C2 : 23.4 ppm
volume of this solution after dilution: 50 ml =Vd
absorbance of this solution: A2: .610
Using formula:
C = (A1* C2*V3)/(A2-A1)*V2
C = 60.26 ppm
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the molar solubility of manganese(ii) carbonate is 4.2 x 10-6 mol/l. what is the solubility product constant, ksp for manganese(ii) carbonate?
The molar solubility of manganese(ii) carbonate is 4.2 x 10-6 mol/l. what is the solubility product constant, ksp for manganese(ii) carbonate is 17.64 × 10⁻¹².
What is molar solubility?Molar solubility (M) is a unit of measurement for a compound's capacity to dissolve in a particular liquid, also known as a solvent. Molar solubility is measured in terms of moles/L since it is the most moles of a solute that can dissolve in one liter of solvent. The solution is said to be saturated when it can no longer dissolve any more solute and the number of moles dissolved in a liter of solvent equals the molar solubility.
The ionization equation for MNCO₃ is given as:
MnCO₃ → Mn²⁺ + CO₃²⁻
Ksp=[Mn²⁺][CO₃²⁻]
From chemical reaction 1 moles of manganese and carbon reacts
than, molar solubility of MnCO₃ = 4.2 × 10⁻⁶ M
4.2 × 10⁻⁶moles of [Mn²⁺] reacts,
than it also reacts with 4.2 × 10⁻⁶ M of CO₃
Thus,
Ksp = (4.2 × 10⁻⁶) x (4.2 × 10⁻⁶)
Ksp = 17.64 × 10⁽⁻⁶⁺⁽⁻⁶⁾⁾
Ksp = 17.64 × 10⁻¹²
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Which clue can be used to identify a chemical reaction as a combustion reaction oxygen is a product?.
According to the claim, the reactant oxygen can be utilized to determine if a chemical reaction is a combustion reaction.
What else do you call a speedy reaction?Appropriate, speedy, and prepared are some typical synonyms for timely. All of these phrases refer to being "able to reply without delay without hesitation or suggestive of such capacity," but prompt is so much more likely to imply that one has had the necessary training and discipline to be able to respond immediately.
A physical reaction is what?A physical response is a reaction that modifies the physical characteristics of an item or material Physical characteristics include things like mass, volume, and density.
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why are the bakelite phenol molecules substitutes only at the ortho and para positions and the meta positions
The bakelite phenol molecules substitute only at the ortho and para positions because the substituents are ortho para direction.
Bakelite is formed from the response of phenol and formaldehyde. essentially, it's far shaped in two steps. within the first step, formaldehyde reacts with phenol and produces o-Hydroxymethyl phenol. Then o-Hydroxy methyl phenol and phenol come collectively and shape Bakelite.
Polyoxybenzylmethylenglycolanhydride, higher known as Bakelite is a thermosetting phenol formaldehyde resin, fashioned from a condensation response of phenol with formaldehyde.
Bakelite is obtained by the condensation reaction of phenol and formaldehyde. it's miles utilized in making electrical switches and switchboards. it is a thermosetting polymer due to the fact on heating it undergoes full-size cross-linking inside the mold.
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g 10. based on the reaction in question 9, write the expression for the equilibrium constant (ka) of acetic acid.
the expression for the equilibrium constant (ka) of acetic acid is :
CH₃COOH + H₂O ⇄ CH₃COO⁻ + H₃O⁺
Ka = [CH₃COO⁻ ][H₃O⁺] / [ CH₃COOH ] [ H₂O ]
The acetic acid is the weak acid . it forms a homogeneous mixture with water and form H₃O⁺. The acetic acid equilibrium is given as :
CH₃COOH + H₂O ⇄ CH₃COO⁻ + H₃O⁺
The equilibrium constant ca be written as :
Ka = [CH₃COO⁻ ][H₃O⁺] / [ CH₃COOH ] [ H₂O ]
Thus, the expression for the equilibrium constant (ka) of acetic acid is :
CH₃COOH + H₂O ⇄ CH₃COO⁻ + H₃O⁺
Ka = [CH₃COO⁻ ][H₃O⁺] / [ CH₃COOH ] [ H₂O ]
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How many o2 molecules are required for two glucose molecules to undergo cellular respiration.
Two glucose molecules would require 12O₂ molecules to go through cellular respiration.
What is cellular respiration?Through a sequence of chemical processes called cellular respiration, glucose is broken down to create ATP, which may then be used as an energy source for a variety of bodily functions. The citric acid cycle, oxidative phosphorylation, and glycolysis are the three primary phases of cellular respiration.
Let's first examine the respiration equation in
C₆H₁₂O₆+6O₂ → 6CO₂+ 6H₂O
According to the equation, the reaction requires 6 moles of oxygen for every mole of glucose.
6 x 2 = 12 moles of oxygen will be needed to provide 2 glucose molecules.
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Describe how a chemical change follows the law of conservation of matter.
