Answer: a) +/- 0.1g
Explanation:
1s2 2s2 2p6 3s2 3p6 4s1 3d5 is the electronic configuration of
a. Cr2+
b. Cu
c. Cu2+
d. Cr
1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d⁵ is the electronic configuration of Cr. the correct answer is D.
There are 24 electrons in all, according to the electron arrangement. A neutral atom will contain 24 protons if it has 24 electrons. The element is determined by its proton count. Chromium, symbol Cr, is the 24th element.
Since Cr contains 24 protons and the +2 charge would result in the nucleus having 26 protons, Cr²⁺ is invalid. Cu is made up of 29 protons. The copper would be Cu⁵⁺ as there are only 24 electrons. Cu²⁺ was rejected for the same reason.
Therefore, 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d⁵ is the electronic configuration of Cr.
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The boiling point of methanol (CH3OH) is 64.7 °C. The boiling point of methyl mercaptan (CH3SH) is 5.96 °C. Which one of the following statements correctly explains this difference?
a) Methanol has a higher boiling point because it has ion-dipole interactions.
b) Methanol has a higher boiling point because it has stronger dispersion forces.
c) Methanol has a higher boiling point because it can form intermolecular hydrogen bonds.
d) Methyl mercaptan has a lower boiling point because it is nonpolar.
e) Methyl mercaptan has a lower boiling point because it is more polar than methanol.
CH3CH2OH has more dispersion forces than CH3OH, so it has the highest boiling point.
What is the boiling point of methanol CH3OH?The primary alcohol and the simplest aliphatic alcohol is methanol, which consists of a methyl and an alcohol group. It serves as an amphiprotic solvent, a fuel, a metabolite for humans, mice, Escherichia coli, and other organisms, as well as a metabolite for Mycoplasma genitalium.
It is a primary alcohol, a volatile organic chemical, a one-carbon compound, and an alkyl alcohol. The acid is a methoxide's conjugate. The strongest intermolecular hydrogen bonds are formed by water, giving it the highest boiling point.
Although ethanol and methanol also create powerful intermolecular hydrogen bonds, water has twice as many intermolecular hydrogen bonds per molecule as ethanol and methanol do. This is so because, whereas in water, 2 H atoms are bonded to an electronegative oxygen atom.
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Considering the following reaction
Pt²⁺(aq) + 2Br⁻(aq) ⇄ Pt(s) + Br₂(l) K=5.3 × 10³
if the concentration of Pt²⁺(aq) is 2.0 × 10⁻² M and the concentration of Br⁻(aq) is 2.0 × 10⁻² M
which of the following is true?
Question 5 options:
• Q > K reactants will form more products as the system reaches equilibrium.
• Q > K products will form more reactants as the system reaches equilibrium.
• Q < K reactants will form more products as the system reaches equilibrium.
• Q < K products will form more reactants as the system reaches equilibrium.
• Q = K the system is at equilibrium.
Q > K products will form more reactants as the system reaches equilibrium. Is true.
What is reaction quotient?The ratio of products to reactants in a process at any particular moment is measured by the reaction quotient Q.By dividing the concentrations of the reactants raised to the power of their stoichiometric coefficients by the concentrations of the products raised to the power of their stoichiometric coefficients, the reaction quotient (Q) is computed.
Q = [Pt(s)][Br₂(1)] / [Pt²+(aq)][Br¯(aq)]²
And if initial concentrations of both Pt²+(aq) and Br-(aq)
is 2.0× 10-² M,
Therefore Q = (1)(1)/(2.0×10-²)³
Since this reaction's equilibrium constant (K) is 5.3 x 103, Q > K suggests that as the system achieves equilibrium, more reactants will be formed from the products.
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Will mark brainless!! The empirical formula for a compound is CH₂O and the molecular weight 180.156 g/mol SHOW WORK!!!
The empirical formula mass of the compound CH₂O is 30g and the molecular weight is 180.156 g/mol. Then the molecular formula is C₆H₁₂O₆.
What is empirical formula ?Empirical formula of a compound is derived from the number of moles of each element in the compound. The formula mass is the sum of masses of atoms in the empirical formula.
Dividing the formula mass with the molecular mass and multiply the empirical formula with the obtained integer will give you the molecular formula of the compound.
Given that, molecular mass = 180.156 g/mol
formula mass = 12 + 2 + 16 =30 g
Then, 180.156/30 = 6
multiply CH₂O with 6 we obtain the molecular formula as C₆H₁₂O₆.
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A 5.0g sample of a hydrate of BaCl₂ was heated, and only 4.3g of the anhydrous salt remained.
What percentage of water was in the hydrate?
The percentage composition of water in a hydrate of BaCl₂ is 14 %.
What is percent composition?Percent composition is defined as a convenient way to record concentration of solution.It is a expression which relates solute to solvent as,mass of element/mass of compound ×100.
It provides quantitative information about the compound and helps in it's analysis.
Percent composition helps in elemental analysis in compound .In the given compound, mass= 5 g and mass of anhydrous salt= 4.3 g , mass of water=5-4.3=0.7 g .
Therefore, percent composition is, 0.7/5×100=14 %.
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Balance the following equation: BF3 + Li2SO3 -> B2(SO3)3 + LiF
The balance equation for the given equation is,
2BF3 + 3Li2SO3 → B2(SO3)3 + 6LiF
What coefficient of lithium fluoride in the balanced chemical reaction?Lithium fluoride is an inorganic compound with the chemical formula LiF. It is a colorless solid, that transitions to white with decreasing crystal size. Although odorless, lithium fluoride has a bitter-saline taste.
Its structure is analogous to that of sodium chloride, but it is much less soluble in water. It is mainly used as a component of molten salts.
Formation of LiF from the elements releases one of the highest energy per mass of reactants, second only to that of BeO.
Fluorine is produced by the electrolysis of molten potassium bifluoride. This electrolysis proceeds more efficiently when the electrolyte contains a few percent of LiF, possibly because it facilitates formation of an Li-C-F interface on the carbon electrodes.
A useful molten salt, FLiNaK, consists of a mixture of LiF, together with sodium fluoride and potassium fluoride.
The primary coolant for the Molten-Salt Reactor Experiment was FLiBe; LiF-BeF2 (66-33 mol%).
The given equation is:
BF3 + Li2SO3 → B2(SO3)3 + LiF
# atoms in Reactants # atoms in Products
B = 1 B = 2
F = 3 F = 1
Li = 2 Li = 1
S = 1 S = 3
O = 3 O = 9
In order to balance the unequal distribution of atoms, multiply BF3 by 2, Li2SO3 by 3 and LiF by 6 to get:
2BF3 + 3Li2SO3 → B2(SO3)3 + 6LiF
Coefficient of LiF = 6
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When water is lost, but electrolytes are retained, the first thing that happens is that
O both the ECF and the ICF become more dilute.
O there is an increase in the volume of the ECF.
O the osmolarity of the ECF falls.
O osmosis moves water from the ICF to the ECF.
O aldosterone is secreted.
When water is lost, but electrolytes are retained, the first thing that happens is that moves water from the ICF to the ECF.
About Intracellular Fluid (ICF)The fluid inside of cells, also called the cytoplasm or cytosol, makes up about 60% of the water in the human body, totaling about 7 gallons. Organelles like the nucleus, endoplasmic reticulum, mitochondria, lysosomes, and Golgi apparatus are suspended in and supported by the ICF. Also found in the ICF are cellular building blocks like sugars, proteins, carbohydrates, and lipids.
About Extracellular Fluid (ECF)ECFs are any body fluids that are not inside cells. The two main components of ECF are plasma and interstitial fluid (IF). The balance consists of cerebrospinal fluid, lymph, the synovial fluid in the joints, pleural fluid in the pleural cavities (lungs), pericardial fluid around the heart, peritoneal fluid in the peritoneal cavity (abdomen), and the aqueous humor of the eye. In mammals, milk is also considered an extracellular fluid.
The Movement of Solutes Between CompartmentsThe ICF has higher amounts of potassium, phosphate, magnesium, and protein compared to the ECF. The plasma has high concentrations of sodium, chloride, and bicarbonate, but lower levels of protein as compared to the ICF. While water moves passively via osmosis, sodium and potassium ions move in and out of cells using active transport ion pumps. The pumps are powered by adenosine triphosphate (ATP) to provide the energy to move the ions against their concentration gradients (i.e. sodium moves out of the cell and potassium is pumped in) and maintain the gradients inside and outside the cell.
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Draw the Lewis structure of CH3OH2+.Draw the Lewis dot structure of CH3OH2+.
The lone pairs or valence electrons represented by the dots. The valence electron of carbon is the first to be evaluated for each element.
What formal charge does the carbon and oxygen have in ch3oh2?The oxidation number of O in [CH3OH2]+ is determined to be -2 based on the discussion that has been provided above. O has a formal charge of 1 and a partial charge that is negative. As a result, choice E is the right response. The CH3OH2Lewis +'s process involves the following steps: H |..plus H - H - O - H | | H H
The specified molecule is CH3OH2+.
What number of valence electrons does ch2n2 have?16 valence electrons make up CH2N2. The carbon in concentration levels has 4 valence electrons, 2 nitrogen atoms offer different 5 valence shell, 2 hydrogen ions each have electron configuration, and so on.
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Use the drag and drop options to label each reaction type in the table below.
The first general equation represents a synthesis reaction and the second one is decomposition. Third equation represents a single displacement reaction and the last one is a double displacement reaction.
What is synthesis reaction?There are different types of reactions. The combination of two species A and B giving a single product is called a synthesis reaction.
Hence, A + B ⇒ C is a synthesis reaction.
In decomposition reaction, one compound breakes into its constituent groups or elements.
AB ⇒ A + B is a decomposition reaction.
In a single displacement reaction, one element or group from a reactant is displaced by the other.
AB + C ⇒ AC + B is a single displacement reaction.
In double displacement reactions, two groups or elements are displaced by other two groups.
AB + CD ⇒ AD + BC is a double displacement reaction.
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Help pleaseeee I dont really understand what it is asking me. This is study island btw
Answer:
Hydrogen can only have 1 proton, if it has a different number of protons then its not hydrogen, elements with the same number of protons but different numbers of neutrons are called isotopes
Cellulose is a polysaccharide which has O only 8-1,4-bonds between glucose units O only a-1,4-links bonds glucose units O both a-1,4-and a-1,6-bonds between glucose units O hemiacetal links joining glucose units O carbon-carbon bonds joining glucose units
In the polysaccharide cellulose, large numbers of monosaccharides are linked together through glycosidic linkages.
What is cellulose a polysaccharide of?TPolysaccharides, which are the most ubiquitous carbohydrates in nature, serve a number of functions, including energy storage and incorporation into plant cell walls.
Tens to thousands of monosaccharides are joined together via glycosidic linkages to form large polymers known as polysaccharides. The three most frequent polysaccharides are starch, glycogen, and cellulose. They are collectively referred to as homopolymers because, after complete hydrolysis, each of these three exclusively yields one type of monosaccharide (glucose).
Heteropolymers may also comprise sugar acids, amino sugars, or non-carbohydrate substances in addition to monosaccharides. Polysaccharides, a class of non-reducing carbohydrates, are not sweet and do not change.
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find the limit, if it exists. (if an answer does not exist, enter dne.) lim x→−[infinity] (x6 + 2x9)
Lim x→−[infinity] (x⁶ + 2x⁹) exists, limit exists for the function x⁶ + 2x⁹ for x tends to -[infinity], and is equal to negative infinity, that is -[infinity].
To find the limit of the function as x approaches negative infinity, we need to substitute a large negative value for x and see what the function evaluates to.
However, in this case, we can see that the function is the sum of two polynomials:
x⁶ + 2x⁹
The term x⁶ becomes insignificant as x becomes very large in magnitude, as x⁶ becomes much smaller than x⁹. Therefore, the limit as x approaches negative infinity is the same as the limit of 2x⁹ as x approaches negative infinity.
Therefore, the limit is:
lim x→−[infinity] (x⁶ + 2x⁹) = lim x→−[infinity] (2x⁹)
lim x→−[infinity] (x⁶ + 2x⁹) = -2×infinity
lim x→−[infinity] (x⁶ + 2x⁹) = -infinity
So, the limit of the function (x⁶ + 2x⁹) as x approaches negative infinity is negative infinity.
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of the compounds below, a 0.1 m aqueous solution of ________ will have the highest ph.
Of the compounds below, a 0.1 M aqueous solution of KCN, Ka of HCN = 4.0 × 10⁻¹⁰ will have the highest pH.
The pH is given as :
pH = pka + log [base] / [acid]
ka for the HCN is 4.0 × 10⁻¹⁰ , the pka = -log ka.
pka = - log (4.0 × 10⁻¹⁰)
pka = 9.30
pH = pka + log [KCN ] / [HCN]
The KCN is the salt of the strong base and the weak acid. The salt of the weak acid and the strong base will have the highest pH . so among the given option , the salt of weal acid and the strong base is the KCN, Ka of HCN = 4.0 × 10⁻¹⁰.
The question is incomplete, the complete question is :
Of the compounds below, a 0.1 m aqueous solution of ________ will have the highest ph.
NaOAc, Ka of HOAc = 1.8 × 10⁻⁵
NaClO, Ka of HClO = 3.2 × 10⁻⁸
NH₄NO₃, Kb of NH3 = 1.8 × 10⁻⁵
KCN, Ka of HCN = 4.0 × 10⁻¹⁰
NaHS, Kb of HS- = 1.8 × 10⁻⁷
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Calculate the equilibrium constant, K, for the following reaction at 25 °C.
Fe3+(aq) + B(s) + 6H2O(l) Fe(s)+ H3BO3(s) + 3H3O+(aq)
The balanced reduction half-reactions for the above equation and their respective standard reduction potential values (E degree) are as follows:
Fe3+(aq) + 3e --> Fe (s) Eo = - 0.04 V
H3BO3(s) + 3H3O+(aq) +3e --> B(s)+6H2O(I) Eo= -0.8698 V
The equilibrium constant for the given reaction is 1.05.
The formula for equilibrium constant is as follows
E° cell= E°cathode- E°anode
So we will find E°cathode as follows
E° cathode = 0.8698 V
and E°anode will be found as
E°anode= -0.04V
By putting the value of E°anode and E° cathode we will get the value of E° cell the solution is a sfollows
E°cell=0.8698 V - (-0.04V)
E°cell= 0.9098 V
E°cell= 0.0592/n logK
From the balanced redox reaction equations above,
n=3
0.9098 V= 0.0592/3 logK
By separating logk as indicated below
logK= 0.0217
Now separating the k by taking log to the RHS by making log as antilog
K= Antilog (0.0217)
So the value of k is as follows
K= 1.05
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Lewis structure, number of electron regions, hybridization, electric geometry, number of lone pairs, molecular geometry , bond angles and polar or non polar for TeO4 2-
The Lewis structure of TeO4⁻² is: [Te]=O-O-O-O.
The number of electron regions is 8 (5 from the Oxygen atoms and 1 from the tellurium atom).
The hybridization of the Te atom is sp3.
The electron geometry is tetrahedral and the molecular geometry is also tetrahedral.
The number of lone pairs is 4 and the bond angles are 109.5 degrees.
The molecule is polar due to the difference in electronegativity between Te and O atoms.
A Lewis structure, also known as a Lewis dot diagram or electron dot diagram, is a way of representing the valence electrons of an atom in a chemical compound. The structure is named after Gilbert N. Lewis, who first proposed it in 1916. Lewis structures depict the chemical symbol of the atom in the center, with dots representing the valence electrons surrounding it. The number of dots corresponds to the number of valence electrons in the element. These dots are used to show the chemical bonds between atoms in a molecule, and can be used to predict the chemical properties and reactivity of the compound.
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"Choose the correct condensed structure from the name: hexene. O CH3CHCHCHCH3 O CHCCH2CH3 O CH3CH2CH2CH2CH2CH3 O CH3CH2CHCHCH2CH3"
The correct condensed structure of hexene is CH₃CH₂CH=CHCH₂CH₃.
A condensed structural formula also termed as semi-structural formula and it is used to describe the organic compounds in a line of text. They will be illustrated in a single line of text and specifies the atoms in the order which are located in a molecule.
Hexene is a hydrocarbon having chemical formula C₆H₁₂. It s used as a comonomer in the production of the polyethylene. There are several number of isomers in hexene, depending on the geometry and position of the double bond in the chain. One of the most common useful of isomers is 1-hexene as well as an alpha-olefin.
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calculate the relative atomic mass of an element R given that the relative abundance of 63R and 65R are 68% and 32% respectively
The relative atomic mass of an element R with two isotopes 63R and 65R is 63.64.
How to calculate relative atomic mass?Relative atomic mass is the ratio of the average mass per atom of the naturally occurring form of an element to 1/12 of the mass of a carbon-12 atom.
The relative atomic mass (RAM) of an element with two isotopes can be calculated by multiplying the mass of each isotope by its respective percentage abundance as follows:
63R = 68%65R = 32%RAM = (63 × 0.68) + (65 × 0.32)
RAM = 42.84 + 20.8
RAM = 63.64
Therefore, 63.64 is the relative atomic mass of the element R.
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Using the formula ln(p1/p2)=(delta H/R)(1/T2-1/T1)
The normal boiling point of benzene is 80.1°C, and the heat of vaporization is AHvap 30.7 kJ/mol. What is the boiling point of benzene in "C on the top of Mt. Everest where P 260 mmHg?
The entropy of vaporization of benzene is 86.7 J/mol.K. where the normal boiling point of benzene is 80.1°C, and the heat of vaporization is AHvap 30.7 kJ/mol.
T(benzene - C₆H₆) = 80.1 °C = 80.1 + 273.15 = 353.25 K.
ΔHvap(C₆H₆) = 30.7 kJ/mol.
ΔSvap(C₆H₆) = ?
ΔS(C₆H₆) = ΔH ÷ T
ΔS(C₆H₆) = 30.7 kJ/mol ÷ 353.25 K
ΔS(C₆H₆) = 0.087 kJ/mol·K = 86.7 J/mol·K.
ΔS - entropy of vaporization.
Benzene is a colorless or light-yellow liquid chemical. Primarily it is used as a solvent in the chemical and pharmaceutical industries, as a starting material and an intermediate in the synthesis of numerous chemicals, and in gasoline. Benzene is produced by both natural and man-made processes.
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Students at allendale high school were tardy most often for fourth hour, right after lunch. therefore, the administration decided to close campus for lunch. as a result, the number of students tardy for fourth hour drastically decreased. when questioned, the principal could say that open campus lunch was a contributing factor to student tardiness.
a. True
b. False
True: when questioned, the principal could say that open campus lunch was a contributing factor to student tardiness.
There are various techniques for determining whether a claim is true. When questioned, the principal could confirm that the claim that open campus lunch contributed to student tardiness was accurate. This is due to the fact that when they removed the open campus for lunch, student tardiness reduced.
Children are expected to arrive at school by the scheduled start time. Children are also expected to stay until the day is over. Coming to school after the start of the school day is being tardy. There are various definitions and procedures for tardiness in schools.
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Answer:
The answer is true :)
Explanation:
List all soluble salt
Answer:
Calcium, potassium, aluminum, chlorine, bromine
Explanation:
I do not know all of them, but here are some.
Drag each process to the correct category. determine whether heating or cooling takes place during each process. evaporation condensation freezing melting sublimation deposition
Heating occurs in the following categories- Heating , Condensation and deposition.
Cooling occurs in Cooling, Freezing and sublimation
The temperature change of a given volume of water as heat is applied at a constant pace is depicted by the heating curve for water. The temperature of the water doesn't fluctuate throughout a phase shift, creating a plateau on the graph.A substance's cooling curve is a graph representing the variation in temperature over time as it is allowed to cool. The gradient of the cooling curve is influenced by the heat capacity, thermal conductivity, and ambient temperature of the material.To know more about cooling here
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The presence or absence of a solute in the filtrate depends on _______.
the pore size of the membrane
The molecular weight and size of the solute as well as the MWCO and pore size of the membrane.
the MWCO of the membrane
the size of the solute
the molecular weight of the solute
The presence or absence of a solute in the filtrate depends on The molecular weight and size of the solute as well as the MWCO and pore size of the membrane.
The presence and the absent of the solute in the filtrate will depends on the molecular weight and the size of the solute as well as the MWCO that molecular weight cut off and pore size of the membrane. The molecular weight cut - off is the lowest molecular weight of the solute from which the 90% of the it is retained by membrane . The MWCO is important in the filtration.
The MWCO describes the pore size. it will describe the rejection capability of the membrane.
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Please Help Quick ASAP Hurry Chemistry Unit 4 Review Sheet
4. If 65.8 grams of SO3 are produced in the unbalanced reaction below, how many grams of oxygen reacted?
SO2(g) + O2(g) → SO3(g)
Work:
Ans:_________
Taking into account the reaction stoichiometry, if 65.8 grams of SO₃ are produced, a mass of 13.16 grams of oxygen reacted.
Reaction stoichiometryIn first place, the balanced reaction is:
2 SO₂ + O₂ → 2 SO₃
By reaction stoichiometry, the following amounts of moles of each compound participate in the reaction:
SO₂: 2 molesO₂: 1 moleSO₃: 2 molesThe molar mass of the compounds is:
SO₂: 64 g/moleO₂: 32 g/moleSO₃: 80 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
SO₂: 2 moles× 64 g/mole= 128 gramsO₂: 1 mole× 32 g/mole= 32 gramsSO₃: 2 moles× 80 g/mole= 160 gramsMass of O₂ requiredThe following rule of three can be applied:If 160 grams of SO₃ are produced by 32 grams of O₂, 65.8 grams of SO₃ are produced by how much mass of O₂?
mass of O₂= (65.8 grams of SO₃× 32 grams of O₂)÷ 160 grams of SO₃
mass of O₂= 13.16 grams
Finally, 13.16 grams of oxygen reacted.
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A 1.00 L solution saturated at 25∘C with lead(II) iodide contains 0.54 g of PbI2.
Calculate the solubility-product constant for this salt at 25∘C.
The solubility-product constant for this salt at [tex]25^{0}[/tex] C is 6.4 × [tex]10^{-9}[/tex]
The solubility product, or Ks, of an ionic compound is the quantity of ions in a saturated solution that are in equilibrium with the solid.
The term "solubility product" refers to the ability of a substance to dissolve as a solute in a solvent to form a solution. The solubility of the ionic compounds that break down in water to form cations and anions varies significantly.
Moles of dissolved [tex]PbI_{2}[/tex] = 0.54 g /461.05 g/mol =0.00117
concentration of dissolved [tex]PbI_{2}[/tex] = 0.00117 mol / 1.0 L = 0.00117 M
Concentration [tex]Pb^{2+}[/tex] = 0.00117 M
Concentration [tex]I^{-}[/tex] = 2 x 0.00117 =0.00234 M
[tex]K_{sp}[/tex] = 0.00117[tex](0.00234)^{2}[/tex] = 6.4 x [tex]10^{-9}[/tex].
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A gas is enclosed in a cylinder fitted with a light frictionless piston and maintained at atmospheric pressure. When 254 kcal of heat is added to the gas, the volume is observed to increase slowly from 12. 0 m3 to 16. 2 m3.
This unit is explained as the work of a driving force of a newton whose point of application moves one meter in the direction of the force
1. The work done by the gas is 425,565 Joules
2. The change in internal energy of the gas is 637,171 Joules
1. W = P (V2 - V1) difference of v1 and v2.
P = 1 atm = 101325 N/m^2
V2 = 16.2 m^3
V1 = 12 m^3
W = 101325(16.2 - 12) = 101325 × 4.2 = equal to 425,565 Joules
2. ∆U = Q - W
Q = 254 kcal = 254×4184 = 1,062,736 Joules
now, Q is equal to 1,062,736 joules
∆U = 1,062,736 - 425,565 = 637,171 Joules
So, U is equal to 637,171 joules.
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How is ph important during digestion? a. digestion needs a constant ph to take place. b. different foods have different ph values. c. enzymes react best with acids. d. different enzymes work best at different ph values.
The value of pH is important during digestion because d. different enzymes work best at different pH values.
What is a protein enzyme molecule?A protein enzyme molecule is a biomolecule used during digestion to carry out the chemical reaction in order to break down foods into smaller particles, which are well known to lower the activation energy requires to produce such reactions.
Protein enzyme molecules are well known to act under certain conditions and the maximum work rate of an enzyme depends on the environment which involves the pH value associated with the presence of hydrogen protons that are able to interact with the substrates of different digestive enzymes.
Therefore, with this data, we can see that protein enzyme molecules are able to lower the activation energy of a given chemical reaction and they work under specific environmental conditions including the pH of the media.
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Which is found inside the stem of a plant?
A. epidermis
B. root hairs
C. xylem
D. leaves
how many kcal are produced when 32.0 g of ch4 react? ch4 + 2o2 → co2 + 2h2o + 218 kcal
Why are heat and alcohol used to disinfect medical equipment? 02 Why is milk given to someone who accidentally ingests a heavy metal ion such as silver or mercury?
The use of heat and alcohol to disinfect medical equipment is because both heat and alcohol are effective at killing microorganisms and bacteria.
Heat can be used to sterilize equipment by exposing it to high temperatures for a certain period of time, while alcohol, specifically ethanol and isopropyl alcohol, can be used to disinfect surfaces by denaturing the proteins and dissolving the lipid membranes of microorganisms.
Milk is not given to someone who accidentally ingests a heavy metal ion such as silver or mercury. Ingestion of heavy metal ions like silver or mercury can cause serious health problems and requires prompt medical attention. Milk is not an effective treatment for heavy metal poisoning, and chelating agents or other specific treatments are used for removing heavy metals from the body.
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London-type smog results from the burning of a. forests b. gasoline c. coal d. hydrogen please select the best answer from the choices provided a b c d
Coal burning is the result of London-type smoge (option C)
A serious case of air pollution known as the Great Smog of London, or Great Smog of 1952, struck London, England, in December 1952. The city was covered in a thick layer of smog due to an extended period of exceptionally cold weather, an anticyclone, and windless circumstances. The majority of the airborne pollutants were caused by the usage of coal. From Friday, December 5, until Tuesday, December 9, 1952, it persisted before dispersing fast as the weather altered.
Significant disruption was caused by the smog, which was far worse than past "pea-souper" pollution storms in that it reduced visibility and even entered indoor spaces. In the weeks that followed the incident, government medical studies suggested that up to 4,000 people had died directly as a result of the pollution and that 100,000 more had become ill as a result.
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