Answer: iodine is oxidised and Chlorine is reduced
Explanation: iodine is oxidised, in I2 oxidation number sim 0,
in HIO oxidation number is +I.
Chlorine is reduced, oxidation number changes from 0 to -I
How many electrons can a 5d sublevel hold?
Answer:
I think it's 10 electrons
Answer:
10 electrons I believe
Explanation:
5 atomic orbitals in 5d sublevel x 2 electrons/orbital = 10 electrons can reside in the 3d sublevel.
How many atoms would fit across a human hair? *
The amount of atoms one million carbon atoms or so make up an average human hair.
What are atoms?The smallest unit of matter that may be divided without ejecting electrically charged particles is called an atom. It is also the smallest material with properties resembling chemical elements. As a result, the atom serves as the fundamental unit of chemistry. In a chemical reaction, atoms cannot be formed or destroyed since they are indivisible units.
One inch has 25,400,000 nanometers. The width of a human hair ranges between 80,000 and 100,000 nanometers. The thickest human hair is a million times smaller than an atom. An atom's diameter spans from 0.1 to 0.5 nanometers. The volume of the cells is typically 0.009 cubic microns. More than 150,000 of these germs could fit on the tip of a human hair, and about 150 of them could fit within one Escherichia coli cell.
Thus, the amount of atoms one million carbon atoms or so make up an average human hair.
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In the solution containing both 0.10 M acetic acid and 0.10 M sodium acetate, the acetic acid undergoes ionization. The chemical equation for this ionization reaction is the same as for a solution containing acetic acid alone. The difference is that the initial concentration of acetate ion (before any ionization reaction occurs) for the solution containing acetic acid alone is zero, whereas the initial concentration of acetate ion is 0.10 M in your solution containing both acetic acid and sodium acetate. Calculate the percent ionization and the expected initial pH for the solution that contained both 0.10 M acetic acid and 0.10 M sodium acetate. (Hint: Again, you will need to use Ka for acetic acid.)
Answer:
percent ionization = 50.01%; pH = 4.75
Explanation:
To solve this question we must write the acetic acid equilibrium (Where HX will be acetic acid and X⁻ the sodium acetate):
HX(aq) ⇄ H⁺(aq) + X⁻(aq)
Where equilibrium constant, Ka, is defined as:
Ka = 1.76x10⁻⁵ = [H⁺] [X⁻] / [HX]
Where the concentration of each ion is:
[H⁺] = X
[X⁻] = 0.10M + X
[HX] = 0.10M - X
Replacing in Ka expression:
1.76x10⁻⁵ = [X] [0.10-X] / [0.10+X]
1.76x10⁻⁶ + 1.76x10⁻⁵X = 0.10X - X²
X² - 0.0999824 X + 1.76×10⁻⁶ = 0
X ≈ 0.1M → False solution. Decreases a lot the concentration of HX
X = 0.0000176M → Right solution.
The concentration of each ion is:
[H⁺] = 0.0000176062M
[X⁻] = 0.10M + 0.0000176M = 0.1000176M
[HX] = 0.10M - 0.0000176M = 0.0999824M
Percent ionization:
[X-] / [X-] + [HX] * 100 =
0.1000176M / 0.2M =
50.01%And pH = -log [H+]
pH = 4.75As you can see, [H+]≈ Ka
The acetoacetic ester synthesis is a method for preparing methyl ketones from alkyl halides.
a. True
b. False
सच्याउंन आधानिक परियोडिक तालिका सफल भयो वा भएन, मूल्याङ्कन गनुहोस्
List out two demerits of Mendeleev's period table. Analyses modern penodic
table is able to overcome these dements or not.
दिदाको तालिका अध्ययन गरी सोधिएका प्रश्नहरुका उत्तर लेख्नुहोस्
Answer:llllIIII
Explanation:
Will give Brainliest!!! Will award answer! The following reaction shows the products when sulfuric acid and aluminum hydroxide react.
2Al(OH)3 + 3H2SO4 → Al2(SO4)3 + 6H2O
The table shows the calculated amounts of reactants and products when the reaction was conducted in a laboratory.
Initial Mass and Yield
Sulfuric Acid Aluminum Hydroxide
Initial Amount of Reactant 40 g 45 g
Theoretical Yield of Water from Reactant 14.69 g 31.15 g
Thank you for helping me learn about chemistry and apply skills.
What is the approximate amount of the leftover reactant? (4 points)
20.89 g of sulfuric acid
22.44 g of sulfuric acid
21.22 g of aluminum hydroxide
23.78 g of aluminum hydroxide
Answer:
23.78 Grams of Aluminum Hydroxide
Explanation:
The table show the amount of reactants and products. The approximate amount of the leftover reactant is 23.78 g of aluminum hydroxide.
What is aluminum hydroxide?Aluminum hydroxide is present in nature as a gibbet. It has many side effects on humans, like nausea, vomiting, etc.
The reaction is [tex]\rm 2Al(OH)_3 + 3H_2SO_4 → Al_2(SO_4)_3 + 6H_2O[/tex]
Thus, the correct option is D, 23.78 g of aluminum hydroxide.
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What is intermolecular forces of attraction
Answer:
Explanation:
Intermolecular forces are the forces of attraction or repulsion which act between neighboring particles (atoms, molecules, or ions ). These forces are weak compared to the intramolecular forces, such as the covalent or ionic bonds between atoms in a molecule
Answer:
Intermolecular forces are the forces which mediate interaction between molecules, including forces of attraction or repulsion which act between atoms and other types of neighboring particles, e.g. atoms or ions.
Explanation:
Hope this helped Mark BRAINLIEST!!!
What is the oxidation state of the underlined atom in the reaction: NaHCO3 + HCl = NaCl + CO2 + H2O
underlined is the Na in NaHCO3
Answer:
+1
Explanation:
Let's consider the following equation.
NaHCO₃ + HCl ⇒ NaCl + CO₂ + H₂O
To determine the oxidation number of Na in NaHCO₃ we will use the following rule: the sum of the oxidation number of the elements present in a compound is equal to this charge. For this compound we know:
The oxidation number of H is +1.The oxidation number of C is +4.The oxidation number of O is -2.The charge of the compound is zero (neutral compound)Na + H + C + 3 O = 0
Na + (+1) + (+4) + 3 (-2) = 0
Na = +1
A common ancestor is an organism that is the
O direct ancestor of two or more different organisms
O direct ancestor of one organism.
O indirect ancestor of two or more different organisms.
O indirect ancestor of one organism.
A common ancestor is an organism that is the direct ancestor of two or more different organisms.
A common ancestor refers to an organism that is shared by multiple organisms, serving as the direct predecessor to those organisms. It is the point in evolutionary history where two or more distinct lineages diverged from a single ancestral lineage. This means that the common ancestor is the starting point from which different species or groups of organisms evolved over time.
In the context of evolution, organisms share common ancestry due to the process of descent with modification. Through genetic inheritance and gradual changes in traits over generations, new species arise from a common ancestor. As these species undergo divergent evolution, they develop distinct characteristics and adaptations, eventually becoming separate lineages.
Hence, the correct option is the direct ancestor of two or more different organisms.
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What is the total number of electrons in the valence shell of an atom of aluminum in the ground
state?
1)8 2)2 3)3 4)10
Answer:
This is a total of ten electrons in filled shells
Explanation:
a. Identify which sets of quantum numbers are valid for an electron. Each set is ordered (n,ℓ,mℓ,ms).
Check all that apply.
3,1,-1,1/2
1,1,0,1/2
1,-1,-1,-1/2
2,1,-1,-1/2
3,0,0,1/2
0,2,1,-1/2
3,2,1,-1
4,3,3,-1/2
3,2,2,1/2
3,3,-1,1/2
4,3,-4,1/2
2,2,1,1/2
b. Consider the addition of an electron to the following atoms from the fifth period. Rank the atoms in order from the most negative to the least negative electron affinity values based on their electron configurations.
Atom or ion Electron configuration
I [Kr]4d105s25p5
Sn [Kr]4d105s25p2
Xe [Kr]4d105s25p6
Required:
Rank the electron affinity from most negative to least negative. To rank items as equivalent, overlap them.
Answer:
a. Values are - (1) 3,1,-1,1/2 (2) 2,1,-1,-1/2 (3) 3,0,0,1/2 (4) 4,3,3,-1/2
(5) 3,2,2,1/2
b. Order be- I > Sn > Xe
Explanation:
a.
Valid quantum numbers are -
'l' value should be less than 'n' value and 'ml' value should be '-l' to 'l'
'ml' value should not more than 'l' or 'n'.
Values are -
3,1,-1,1/2
2,1,-1,-1/2
3,0,0,1/2
4,3,3,-1/2
3,2,2,1/2
b.
Given that-
I [Kr]4d¹⁰5s²5p⁵
Sn [Kr]4d¹⁰5s²5p²
Xe [Kr]4d¹⁰5s²5p⁶
Order be-
I > Sn > Xe
Xe is least because it is completely filled outer shell (5s²5p⁶
X^2/3-5X^1/3+6=0
find x
Answer:
[tex]x=27,8[/tex]
Explanation:
The equation is
[tex]x^{\dfrac{2}{3}}-5x^{\dfrac{1}{3}}+6=0[/tex]
Let,
[tex]x^{\dfrac{1}{3}}=y[/tex]
So,
[tex]y^2-5y+6=0\\\Rightarrow y=\dfrac{-\left(-5\right)\pm \sqrt{\left(-5\right)^2-4\times 1\times 6}}{2\times 1}\\\Rightarrow y=3,2[/tex]
[tex]x^{\dfrac{1}{3}}=y\\\Rightarrow y^3=x\\\Rightarrow x=3^3\\\Rightarrow x=27[/tex]
[tex]x=2^3\\\Rightarrow x=8[/tex]
Hence, [tex]x=27,8[/tex].
What is the IUPAC name Of
CH3-CH2-CH2-CH=O
I
COOH
Answer:
Explanation:
It is Butanoic Acid
Which of the following is a large glycoprotein?
A. Antidiuretic hormone
B. Oxytocin
C. Follicle-stimulating hormone
D. Epinephrine
Answer:
B. Oxytocin
I think this is correct answer...
NH4OH+HCLO4
Total ionic
Answer:
[tex]OH^-(aq)+H^+(aq)\rightarrow H_2O(l)[/tex]
Explanation:
Hello there!
In this case, according to the given reactants, it is firstly necessary to set up the complete molecular reaction:
[tex]NH_4OH(aq)+HClO_4(aq)\rightarrow NH_4ClO_4(aq)+H_2O(l)[/tex]
Now, by knowing that ionic species are able to ionize, we are able to write the complete ionic equation:
[tex]NH_4^++OH^-+H^++ClO_4^-\rightarrow NH_4^++ClO_4^-+H_2O(l)[/tex]
Whereas ammonium and chlorate ions are spectator ions because they remain the same on both sides of the equation. Therefore the total or net ionic equation would be:
[tex]OH^-(aq)+H^+(aq)\rightarrow H_2O(l)[/tex]
Best regards!
How can catastrophic events impact ecosystems? Give at least 4 examples. Use complete sentences.
The loss of plants caused by a tornado can allow new species of plants to grow in the cleared area. Plants that survive can grow more abundantly then other species. This loss of vegetation could also lead to soil erosion.
Negative impacts of catastrophic events on ecosystem are damage to habitats, loss of biodiversity, erosion of soil and an increased risk from wildfires.
What are catatrophic events?Catastrophic events are situations where destruction occur in an environment. It can be man made or natural. Due to catastrophic events, the Earth is maintaining equilibrium.
So we can conclude that damage to habitats, loss of biodiversity, erosion of soil and an increased risk from wildfires are the negative impacts of catatrophic events.
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Sally has constructed a concentration cell to measure Ksp for MCln. She constructs the cell by adding 2 mL of 0.05 M M(NO3)n to one compartment of the microwell plate. She then makes a solution of MCln by adding KCl to M(NO3)n. She adds 6.380 mL of the resulting mixture to a second compartment of the microwell plate.
Sally knows n (the charge on the metal ion) = +2
She has already calculated [Mn+] in the prepared MCln solution using the Nernst equation. [Mn+] = 8.279 M
Required:
How many moles of [Cl-] must be dissolved in that compartment?
Answer:
0.1056 mole
Explanation:
As Sally knows that the charge on the metal ion is n = +2
[tex]$MCl_n=MCl_2$[/tex]
In that compartment [tex]$[M^{n+}]=[m^{2+}]=8.279 \ M$[/tex]
The volume of the [tex]$MCl_n$[/tex] taken in that compartment = 6.380 mL
So, the number of moles of [tex]$M^{2+} = 8.279 \times 6.380$[/tex]
= 52.82 m mol
= 0.05280 mol
[tex]$MCl_n \rightarrow M^{n+}+nCl^-$[/tex]
But n = 2
Therefore, moles of [tex]$Cl^-$[/tex] = 2 x moles of [tex]$M^{n+}$[/tex]
= 2 x 0.05282
= 0.1056 mole
Identify the products formed in this Brønsted-Lowry reaction. HCO−3+HBrO↽−−⇀acid+base
Answer:
[tex]HCO^-_3+HBrO\rightleftharpoons H_2CO_3+BrO^-[/tex]
Explanation:
Hello there!
In this case, according to the Brønsted-Lowry theory of acids, it is possible to realize that HBrO acts as the Brønsted-Lowry acid as it has a free hydrogen to give away to HCO₃⁻ which acts as the Brønsted-Lowry base able to accept the incoming hydrogen; therefore, the Brønsted-Lowry reaction is:
[tex]HCO^-_3+HBrO\rightleftharpoons H_2CO_3+BrO^-[/tex]
Best regards!
In the Brønsted-Lowry reaction between HCO⁻₃ and HBrO, the formed acid is H₂CO₃ and the formed base is BrO⁻.
According to Brønsted-Lowry acid-base theory:
An acid is a substance that donates H⁺.A base is a substance that accepts H⁺.Let's consider the following Brønsted-Lowry reaction.
HCO⁻₃ + HBrO ⇄ acid + base
HBrO can only donate H⁺, so it is an acid.HCO⁻₃ can accept or donate H⁺. Here, it will accept the H⁺ donated by HBrO and behave as a base.The resulting reaction is:
HCO⁻₃ + HBrO ⇄ H₂CO₃ + BrO⁻
H₂CO₃ can donate H⁺ so it is an acid.BrO⁻ can accept H⁺ so it is a base.In the Brønsted-Lowry reaction between HCO⁻₃ and HBrO, the formed acid is H₂CO₃ and the formed base is BrO⁻.
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Which of the following is an base?
OK₂CO₃
ОНЕ
NaCl
NaOH
Answer:
NaOH
Explanation:
NaOH is called base because it dissociates completely in aqueous solution to form hydroxide ion(OH-) and sodium cation (Na+). When it react with an acid , it produce sodium salt and water. It is a strong base because it dissociates completely.
A hammer can be used to see how a mineral breaks. If you observe square chunks of the mineral when broken, what can you conclude?
a
The mineral is soft.
b
The mineral is hard.
c
The mineral has cleavage.
d
The mineral does not have cleavage.
Answer:
a
Explanation:
it can not break that easily
The mineral has given square chunks when breaked with a hammer. This indicates that the mineral has a cleavage. Thus, option c is correct.
What is mineral?Minerals are naturally formed inorganic substances which are having a definite chemical composition and highly ordered crystalline structures. Minerals are deposited in many organic and inorganic matters.
Minerals have some peculiarities such as hardness, cleavage, color etc. Cleavage of a mineral is its tendency to break along crystallographic planes thereby the structural locations of ions and atoms in the crystal creates planes of relative weakness.
Cleavage of crystal results in pieces of square, cubic or other geometrical shapes. in The mineral here, broken into square pieces indicating that the mineral have some weaker crystallographic planes in comparison to other and they cleave. Thus, c is correct.
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Food Energy Math
For this assignment you will have to calculate the food energy required to power various devices. You will be required to select 5 foods you have at your home and calculate how many of each item will be required to perform each mechanical or electrical process. Remember to calculate the per item calories; a serving of 2 chocolate sandwich cookies is 80 calories, one sandwich cookie is 40 calories.
For example, a coffee maker will require about 400 Watts of energy to run for an hour. 1 Kilocalorie is equal to 1.163 Watts, so the coffeemaker will require 343.9 Kilocalories to run for this length of time. If it could be converted to electricity how many fastfood cheeseburgers, (417 calories) would that require? Only 1 cheeseburger
Conversions:
1 Kcal- 1.163 Watts per hour
31,500 Kcal – 1 Gallon of gasoline
Answer:
https://courses.lumenlearning.com/cheminter/chapter/energy-in-food-and-nutrition/
Explanation:
what part of of the universe is less than 1 km in diameter
Answer:
Meteoroids
Explanation:
Meteoroids are the elements of the universe that have the smallest diameter among all elements, reaching less than 1 km in diameter. They are any rocky or metallic body, which exists in space and does not reach more than 100 meters. It is common for meteoroids to fall to earth, but their impact is not as destructive as the impact of other space bodies, due to their tiny size.
A car accelerates away from the starting line at 3.6 m/s2 and has the mass of 2400 kg. What is the net force acting on the vehicle?
Answer:
F = m x a
F = 2400 kg x 3.6 m/s2
F = 8,640 N
Explanation:
What is the pH of 0.42M aniline?
Answer:
Kb=x^2/0.42-x (eqn to calculate)
basicity (pkb) 9.3
Explanation:
What can you tell about a solution by using a phenolphthalein solution?
Answer:
Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions. ... It is a weak acid, which can lose H+ ions in solution.
Chemical formula: C20H14O4
GHS precautionary statements: P201, P281
Explanation:
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There are about 26 deuterium atoms for every million hydrogen atoms across the universe, but it is six times as prevalent in the water on Earth and in other solar system bodies. Deuterium has one more ———— than hydrogen.
A. Ionic pair
B. Hydrogen bond
C. Proton
D. Electron
E. Neutron
Answer:
Option E
Deuterium has one more neutron than hydrogen
Explanation:
Deuterium is an isotope of Hydrogen and hence there will variation in the number of neutron
Hydrogen has 0 neutron
Deuterium has 1 neutron and
Tritium has 2 neutron
Thus option E is correct
In the universe, there are approximately 26 deuterium atoms for every million hydrogen atoms. Deuterium has one more neutron than hydrogen.
The correct option is E.
What is deuterium?Deuterium is a stable isotope of hydrogen, whose atomic weight is 2.014.
It is also called heavy hydrogen, and it contains one neutron and one proton.
In nuclear fusion reactors, deuterium is employed as a tracer, while in heavy water moderated fission reactors, it is utilized to slow down neutrons.
Thus, the correct option is E.
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If 10.00 moles of copper are reacted with 6.00 moles of sulfur according to the following balanced equation, which reactant is the limiter and how many moles of excess reactant would remain after the reaction is completed? 2 Cu + S --> Cu2S
Cu is limiting and 1.00 mole of excess S remain
S is limiting and 1.00 moles of excess Cu remain
S is limiting and 4.00 moles of excess Cu remain
Cu is limiting and 4.00 moles of excess S remain
Answer: Cu is limiting and 1.00 mole of excess S remain
Explanation:
The chemical balanced reaction is:
[tex]2Cu+S\rightarrow Cu_2S[/tex]
According to stoichiometry :
2 moles of [tex]Cu[/tex] require 1 mole of [tex]S[/tex]
Thus 10.00 moles of [tex]Cu[/tex] will require=[tex]\frac{1}{2}\times 10.00=5.00moles[/tex] of [tex]S[/tex]
Thus [tex]Cu[/tex] is the limiting reagent as it limits the formation of product and [tex]S[/tex] is the excess reagent.
Moles of S left = (6.00-5.00) moles = 1.00 mole
Thus Cu is limiting and 1.00 mole of excess S remain.
What is the molarity of a 5 L solution that contains 7.5 moles of NaOH?
A. O 1500 M
В.
1.5 M
C
0.017M
D. O 0.015 M
The molarity of the solution will be:
B. 1.5 M, this can be calculated on adding the values of V and n in molarity formula.
What is Molarity?It is defined as the ratio of number of moles of solute by the Volume of the solution in liters.
It is given by:
Molarity = n/ V
What information do we have?
Volume = 5L
Moles of NaOH = 7.5 moles
On substituting the values
M= n/V
M= 7.5 moles / 5L
M= 1.5 M
Thus, the molarity of the solution is 1.5 M.
Hence, option B is correct.
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The weather on Earth is influenced by the oceans, which store, release, and redistribute energy through evaporation. The source of this energy is–
A. solar radiation
B. gravitational attraction
C. density differences
D.chemical reactions
A rectangular block has dimension 20m x10mx5m and mass of 400kg calculate the density of the rectangular block
Answer:
0.4 kg/m^3
Explanation:
v (volume) = 20m x 10m x 5m = 1000 m^3
w (weight) = 400 kg
d (density) = w / v
d = 400 / 1000 = 0.4 kg per cubic meter (kg/m^3)
I apologize if this is a little complex, however all of the math is there, if you're interested then look it over. Otherwise I've provided the answer in the units used for the dimensions and weight provided.