Answer:
This is a total of ten electrons in filled shells
Explanation:
What are characteristics of absorption spectra? Check all that apply.
Light is absorbed, which produces characteristic lines.
| Light is emitted, which produces characteristic lines.
Lines are dark on a visible light background.
Lines are brightly colored on a black background.
Lines are produced by electrons being excited.
Lines are produced from electrons returning to a lower energy level.
Answer:
Light is absorbed, which produces characteristic lines.
Lines are dark on a visible light background.
Lines are produced by electrons being excited.
Explanation:
Edg
The characteristics of absorption spectra light is absorbed, which produces characteristic lines, lines are dark on a visible light background and Lines are produced by electrons being excited.
What is absorption spectra?The term "absorption spectroscopy" applies to spectroscopic methods that assess how much radiation interacts with a sample and is absorbed as a proportion of frequency or wavelength. The sample takes in photons, meaning energy, from the emitting field.
What are electrons?The electron would be a subatomic particle with a negative one fundamental charge electric charge. Due to their lack of components or substructure, electrons, which have become part of the lepton particle family's first generation, could be typically regarded to be elementary particles.
The percentage of incoming electromagnetic energy that a material absorbs across a variety of frequencies is displayed in the material's absorption spectrum. In a way, an emission spectrum would be the converse of an absorption spectrum.
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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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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].
22 Which of the following statements is true for all loving organisms? A. All living organisms are made of one or more cells with a cellular membrane and have a cell wall. B. All living organisms are made of one or more cells with a cellular membrane and have a nucleus. C. All living organisms are made of one ore more cells with a cellular membrane and genetic material. D. All living organisms are made of one or more cells with a cellular membrane and have chloroplast
Answer:
C
Explanation:
Ape-x
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.
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 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:
5. What is the pH of a solution with p0H= 8.5? Is this an acid, base, or neutral?
Answer:
pH = 5.5 and it is an acid
Explanation:
Fr the question given above, the following data were obtained:
poH = 8.5
pH =?
pH + pOH = 14
pH + 8.5 = 14
Collect like terms
pH = 14 – 8.5
pH = 5.5
pH scale reads as follow:
0 to 6 => Acidic
7 => Neutral
8 to 14 => Basic
With the above pH scale, we can conclude that the solution with pH 5.5 is acidic.
What is the pH of 0.42M aniline?
Answer:
Kb=x^2/0.42-x (eqn to calculate)
basicity (pkb) 9.3
Explanation:
Is anyone good at chemistry if so can someone help me please ?
(NO LINKS)
Since pH + pOH = 14, given a pOH of 4.53, our pH would be 14 - 4.53 = 9.47. And since the pH is greater than 7, this solution is basic. So, the correct answer choice would be D.
List three aids with example that are useful for people who are optically impaired
please answer then I will mark you as brainliest
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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2. Seed color--- a. Yellow is dominant (Y) b. Green is recessive (y) c. A yy father and a yy mother d. What color(s) are the parents? e. What color(s) are the children?
Answer:
The parents are green and the children are green.
Explanation:
They all have the green recessive (y). So, the parents are green and the children are green.
Please disregard this
well i need points
Explanation:
thanks
Please help
I need to turn in in 5 min
<3
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.
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!
5.50 L of a 0.190 M CaCl2M CaCl2 solution
How do you find Grams?
Answer:
115.891
Explanation:
Molarity is equal to moles/liters so to get moles we multiply molarity by liters, after this we multiply the moles by the total atomic weight of the compound to get grams
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
If 75 g. of Potassium Chloride (ionic compound) is dissolved in 250 grams of
water, what will be the freezing point of the solution? Kf = 1.86
Answer:
[tex]T_{f,sol}=-15.0\°C[/tex]
Explanation:
Hello there!
In this case, for these problem about the colligative property of freezing point depression, it is possible set up the following equation:
[tex]T_{f,sol}-T_{f,water}=-i*m*Kf[/tex]
Whereas the van't Hoff's factor, i, is 2 since KCl is ionized in two ions (K+ and Cl-); and the molality (m) of the solution is computed by:
[tex]m=\frac{75g*\frac{1mol}{74.55g} }{250g*\frac{1kg}{1000g} } \\\\m=4.02mol/kg[/tex]
Thus, since the freezing point of water (ice) is 0°C, we obtain the following freezing point of the solution by plugging in:
[tex]T_{f,sol}=-(2)(4.02mol/kg)(1.86\°C/mol*kg)\\\\T_{f,sol}=-15.0\°C[/tex]
Best regards!
Why is there not a constant molar volume for solids and
liquids?
a Solid and liquid particles are packed close together,
b The densities of solids and liquids are variable.
с
The volume of a solid or a liquid has very little
empty space.
d All of the above
Answer:
all of the above
Explanation:
i got the answer right on cK-12
what is the speed of the electromagnetic waves please solve using correct units ill give brainliest.
Answer:
3 m
Explanation:
We'll begin by converting 99.9 MHz to Hz. This can be obtained as follow:
1 MHz = 10⁶ Hz
Therefore,
99.9 MHz = 99.9 MHz × 10⁶ Hz / 1 MHz
99.9 MHz = 99.9×10⁶ Hz
Finally, we shall determine the wavelength. This can be obtained as follow:
Frequency (f) = 99.9×10⁶ Hz
Velocity (v) = 3×10⁸ m/s
Wavelength (λ) =?
Velocity = wavelength × frequency
v = λf
3×10⁸ = λ × 99.9×10⁶
Divide both side by 99.9×10⁶
λ = 3×10⁸ / 99.9×10⁶
λ = 3 m
Thus, the wavelength of the electromagnetic wave is 3 m.
How much energy is needed to evaporate 100g of water
Answer: you would have to remove 80 calories from 1 g of pure water at the freezing point, 0˚ C, to convert it to 1 g of ice at 0˚ C. Explanation:However, 540 calories of energy are required to convert that 1 g of water at 100˚ C to 1 g of water vapor at 100˚ C. This is called the latent heat of vaporization. On the other hand, you would have to remove 80 calories from 1 g of pure water at the freezing point, 0˚ C, to convert it to 1 g of ice at 0˚ C.
Please answer this question correctly
Answer:
a d c a b b
Explanation:
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:
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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Graphite, an allotrope of carbon, is converted into cubic diamond through a process that may take a billion years or longer. As illustrated above, scientists can make synthetic diamonds using a certain process in about one week. However, these synthetic diamonds have carbon atoms in a hexagonal lattice. Diamonds with a carbon atoms in a cubic lattice are not produced even though they are thermodynamically more stable than hexagonal diamond. Which of the following best justifies why the synthetic process produces hexagonal diamond and not the more thermodynamically stable cubic diamond?
a. The amount of energy required to create new bonds between carbon atoms in cubic diamond is much greater than the amount of energy required to create hexagonal diamond.
b. The amount of energy required to create new bonds between carbon atoms in cubic diamond is much smaller than the amount of energy required to create hexagonal diamond.
c. The activation energy needed to form cubic diamond is much less than the activation energy needed to form hexagonal diamond.
d. The activation energy needed to form cubic diamond is much greater than the activation energy needed to form hexagonal diamond.
Answer:
The activation energy needed to form cubic diamond is much greater than the activation energy needed to form hexagonal diamond.
Explanation:
The activation energy refers to the minimum energy that reacting species must possess before they can undergo a particular chemical reaction.
This implies that if species do not possess the activation energy, they hardly undergo a given reaction. The activation energy is the barrier between reactants and products.
Hence, a reaction that has a very high activation energy occurs slowly or may not even occur. The activation energy needed to form cubic diamond is much greater than the activation energy needed to form hexagonal diamond hence the synthetic process produces hexagonal diamond and not the more thermodynamically stable cubic diamond.
what is the formula for fluoride?
Answer:Chemical formula F −
Molar mass 18.998403163 g·mol−1
Conjugate acid Hydrogen fluoride
Explanation:
Which product forms from the synthesis reaction between lithium (Li) and oxygen (O)?
A. Li2O
B. LiO
C. LiO2
D. Li2O2
Answer:
A Li2O
Explanation:
Li has a 1+ charge and O has a 2- charge so to balance the charges there needs to be 2 Li for every 1 O
The product forms from the synthesis reaction between lithium (Li)and oxygen (O) is Li₂O. The correct option is A.
What is synthesis reaction?
Synthesis reaction is the reaction when two or more products combine to form a single product.
An example of a synthesis reaction is the combination of sodium (Na) and chlorine (Cl) to produce sodium chloride (NaCl).
Thus, the correct option is A. Li2O.
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(d) Other
sugar molecules become
_____ and are carried away from the crystal.
the force of attraction is
Answer:
liquid
Explanation:
defiantly