Answer:
C: They both have 1 electron in a p orbital.
Explanation:
Find the electron configuration of B
Boron is 1s 2s2 2p1
Find the electron configuration of Al
Aluminum is 1s2 2s2 2p6 3s2 2p1
If you look at the p orbital, they both have 1 electron.
Therefore, the correct answer is C.
Hope it helped!
Aluminum metal reacts with hydrochloric acid to produce solid aluminum chloride and hydrogen gas. how many moles of aluminum are needed to produce 1.2 moles of hydrogen gas?
Moles of Aluminum needed : 0.8
Further explanationGiven
1.2 moles H₂
Required
moles of aluminum
Solution
The reaction coefficient in a chemical equation shows the mole ratio of the components of the compounds involved in the reaction (reactants and products)
Reaction(balanced equation)
2Al + 6 HCl = 2AlCl₃ + 3H₂
From the equation, mol ratio of Al : H₂ = 2 : 3, so mol Al :
= 2/3 x mol H₂
= 2/3 x 1.2
= 0.8 moles
what the answer. the correct answer
Answer:
F, Cl, Br, I because all elements found in group 7 which is halogen.
Answer:
F, Cl, Br, I
Explanation:
Because theyre all in the same family. :)
Explain Joule's law in your own words. pls help
Answer:
Joules first law is a law that expresses the relatioship between heat that is generated and the current flowing heat thats through a conductor. The second law says that internal energy is independent of volume and pressure, depending only on temperature!
Explanation:
How many formula units are in 2.5 moles of NaCl?
Answer: 1.5 x 10 24
Explanation:
One mole of NaCl contains 6.022 x 1023 NaCl formula units
In 2.5 moles of NaCl there will be basically 5 moles of ions as per the given data.
What is a compound?A material created by joining two or more distinct elements chemically in science.
A compound in chemistry is a material comprised of two or more separate chemical elements mixed together in a certain proportion.
Chemical connections that are challenging to break are created when the elements interact with one another.
2.5 mol of NaCl contains 5 moles of ions. This is due to the fact that 1 mol of NaCl contains 2 mol of ions, so you must multiply the molecular weight of the molecule by two to obtain the number of ions.
Thus, the answer is 5 moles.
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How much of earth's freshwater is in the solid state or under ground?
That would be B: 33%, but please correct me if I'm wrong ^^
Answer:
that would be b:33 i believe pls dont blame met
The total number of the elements above with 2 valence electron is ____.
Answer:
four elements
Explanation:
He = 1s²
Be = 1s² 2s²
C = 1s² 2s² 2p²
Mg = 1s² 2s² 2p⁶ 3s²
Si = 1s² 2s² 2p⁶ 3s² 3p²
Ca = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²
Valence electrons are those electrons which are present in outer most electronic shell.
He, Be, Mg, Ca these four elements have 2 valence electrons.
While Si and C have four valance electrons.
The total number of the elements above with 2 valence electron is four.
The electronic configurations of the elements are given:
He = 1s²
Be = 1s² 2s²
C = 1s² 2s² 2p²
Mg = 1s² 2s² 2p⁶ 3s²
Si = 1s² 2s² 2p⁶ 3s² 3p²
Ca = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²
Valence electrons are those electrons which are present in outer most electronic shell.
He, Be, Mg, Ca these four elements have 2 valence electrons.Learn more:
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A parent with freckles is crossed with a parent without freckles. The Punnett square shows the possible genotypes and phenotypes of the offspring. Which statement accurately describes the probability of phenotypes?
Answer: The likelihood of the offspring having freckles and not having freckles is the same.
Explanation:
Freckles are tiny brown spots on your skin, often in areas that get sun exposure. freckles are harmless. They shape as a consequence of melanin overproduction, which is responsible for skin and hair color (pigmentation). Overall, freckles derive from ultraviolet (UV) light stimulation.
Answer:
The likelihood of the offspring having freckles and not having freckles is the same.
Explanation:
just did it
does something that is hot have more thermal energy than something that’s cold?
Answer:
Yes it does because the atoms/molecules are moving faster than they are in a cold substance.
Explanation:
What element am I if I have 6 protons and
8 neutrons?
Answer:
The element you would have is Carbon-14.
Explanation:
Carbon-14 has 6 protons and 8 neutrons. To find the atomic mass, you add the protons to the neutrons, so the atomic mass of Carbon-14 is 14.
#teamtrees #WAP (Water And Plant)
An object at rest has equal forces acting on it. This can be described as a __________ force.
PLEASE ANSWER QUICK! 50 POINTS!!!!
How does the structure of amino acids allow them to form a polypeptide?
Options:
A. Each amino acid has an amino group and a carboxyl group.
B. Each amino acid has a hydrogen atom and a carboxyl group.
C. Each amino acid has a carboxyl group and an R group.
D. Each amino acid has an R group and a hydrogen atom.
Answer:
A. Each amino acid has an amino group and a carboxyl group.
Answer:a
Explanation:
Plz help me it is so confusing
Which of the following was NOT used in support of the continental drift hypothesis?
fossil evidence
fit of South America and Africa
mountain ranges across continents
differences in ocean salinity levels
Answer:
fossil evidence
fit of South America and Africa
Explanation: can i have brainlist please
A 0.200 M NaOH solution was used to titrate a 18.25 mL HE
solution. The endpoint was reached after 31.20 mL of titrant
were added. Find the molar concentration of the original HF
solution.
Answer:
M₂ = 0.34 M
Explanation:
Given data:
Molarity of NaOH =M₁ = 0.200 M
Volume of HF =V₂= 18.25 mL
Volume of NaOH added = V₁ = 31.20 mL
Molarity of HF solution = M₂ = ?
Solution:
M₁V₁ = M₂V₂
by putting values,
0.200 M × 31.20 mL = M₂ × 18.25 mL
M₂ = 0.200 M × 31.20 mL / 18.25 mL
M₂ = 6.24 M.mL / 18.25 mL
M₂ = 0.34 M
how can you tell which compound in a solution is the solvent?
(own words please)
Answer:
The way you can know which compound in a solution is a solvent is by usually just determining which substance is a solute and which is a solvent. The solute is when it is dissolved and it takes on the characteristics of the solvent.
Explanation:
Hope this helps!
17. Calculate the percent composition of B2Br6
Answer:
%composition of B₂ = 4.3%
%composition of Br₆ = 95.7%
Explanation:
Given data:
Percent composition of B₂Br₆ = ?
Solution:
Total mass of B₂Br₆ = 10.8×2 + 79.9×6 = 501 g/mol
%composition of B₂ = ( 21.6 g/ 501 g ) × 100
%composition of B₂ = 0.043 × 100
%composition of B₂ = 4.3%
%composition of Br₆ = ( 479.4 g/ 501 g ) × 100
%composition of Br₆ = 0.957 × 100
%composition of Br₆ = 95.7%
If a concentrated solution of acetic acid is 99.5 % HC 2 H 3 O 2 and has a density of 1.05 g/mL, what is the concentration of this acid in moles per litre?
The concentration of this acid in moles per litre : 17.41
Further explanationGiven
99.5% acetic acid
density=ρ=1.05 g/ml
Required
the concentration (mol/L)
Solution
99.5% dan density 1.05 g/ml (MW acetic acid = 60 g/mol)
[tex]\tt 99.5\%\times 1.05\dfrac{g}{ml}\times \dfrac{1000~ml}{L}=1044.75~g/L\\\\\dfrac{1044.75~g/L}{60~g/mol}=17.41~mol/L[/tex]
1. List the types of fronts found on this map
Answer:
Cold Front. A side view of a cold front (A, top) and how it is represented on a weather map (B, bottom). ...
Warm Front. ...
Stationary Front. ...
Occluded Front.
When can I use ideal gas law?
Calculate the maximum mass of aluminium which can be extracted from 10 kg of
aluminium oxide
2AlO3+ 3C ----->4Al + 3CO2
Answer:
Hrishikesh. bshjsjbd. jwjjja
Under which conditions will sugar most likely dissolve fastest in a cup of water?
A. A sugar cube with stirring at 5°C
B. A sugar cube without stirring at 15°C
C. Sugar crystals with stirring at 15°C
D. Sugar crystals without stirring at 5°C
Answer:
The correct answer would be C
Explanation:
Plz correct me if wrong
The condition in which sugar is most likely to dissolve fastest in a cup of water is when sugar crystals with stirring at 15°C. Therefore, option C is correct.
What conditions are required for dissolution?Dissolution is the process by which a solute dissolves in a solvent to form a homogeneous mixture called a solution. The conditions required for dissolution are:
Agitation: The solute and solvent must be mixed together so that they come into contact with each other.Temperature: Increasing the temperature of the solvent increases the kinetic energy of its molecules, making it easier for the solute to dissolve.Pressure: Increasing the pressure of a gas above a liquid solvent can force more gas molecules into the solvent, increasing its solubility.Surface area: The rate of dissolution is directly proportional to the surface area of the solute particles exposed to the solvent. Polarity: A solute will dissolve in a solvent that has similar polarity.Thus, option C is correct.
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How does Cyanoacrylate compare to the elements that make it up?
Answer: The elements of the cyanoacrylate are different as compared to the main cyanoacrylate.
Explanation:
The cyanoacrylate is a adhesive water based substance. It is used for developing fingerprints by fuming method. It is the acrylic monomer which has property to develop into a plastic form after application another of its composition is the acrylic resin which imparts adhesiveness to the cyanoacrylate.
Dry ice changes from a solid to a gas in a process known as A. Melting B. Freezing C.sublimation
Answer:
c
Explanation:
solid to gas directly
which term refers to the condition that exists when no over all change in concentration results from diffusion?
a. concentration
b. osmosis
c. equilibrium
d. randomness
Answer:
a.cocentration es la respuesta
Analyze the energy associated with a phase change and provide an example of how energy is conserved.
1:The energy involved in a phase change depends on two major factors: the number and strength of bonds or force pairs. The number of bonds is proportional to the number of molecules and thus to the mass of the sample. The strength of forces depends on the type of molecules. The heat Q required to change the phase of a sample of mass m is given by
2:According to the law of conservation of energy, energy can neither be created nor destroyed but can be transformed from one form to another. Conversion of electric energy into sound energy is an example of the conservation of energy.
Explanation:
Hope it helps UvU
Wass, volume and density are all properties of
matter
3
weight.
formula
Answer:
:)
Explanation:
They are all properties of Matter. weight and formula wouldn't make sense.
Using the expression Ka=[H+][A−][HA] , explain how to determine which solution has the lower pH , 0.10MHF(aq) or 0.10MHC2H3O2(aq) . Do not perform any numerical calculations.
Answer:
0.10MHF(aq)
Explanation:
Given that:
[tex]K_a = \dfrac{[H^+][A^-]}{HA}[/tex] , to find the solution with a lower pH between 0.10MHF(aq) or 0.10MHC2H3O2(aq).
Recall that:
The higher the Ka value, the higher the ionization, hence more formation of protons in the solution. Also, higher H⁺ in solution results in a lower pH value.
Since HF have a higher Ka value, then HF solution will have a lower pH.
The acidity and alkalinity measure of a substance based on hydroxyl or hydrogen ion released is called pH. It is measured based on the pH scale that tells about the acidity and basicity of the substance.
0.10 M [tex]\rm HF[/tex] (aq) has lower pH.
The pH can be explained as:The acid dissociation constant ([tex]\rm K_{a}[/tex]) is given by,
[tex]\rm K_{a} = \dfrac{[H^{+}][A^{-}]}{[HA]}[/tex]
The value [tex]\rm K_{a}[/tex] of can be used for determining the lower and higher pH.When the [tex]\rm K_{a}[/tex] value is high then the ionization of the substance will be higher resulting in the release of more protons in the solution.When [tex]\rm H^{+}[/tex] is high then the pH will be lower and the solution will be more acidic.The [tex]\rm K_{a}[/tex] value of [tex]\rm HF[/tex] is more compared to the [tex]\rm HC_{2}H_{3}O_{2}[/tex] resulting in lower pH and more acidity.Therefore, 0.10 M [tex]\rm HF[/tex] (aq) has lower pH.
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Describe subscripts in chemical equations.
BRAINLIEST!! PLZ HELP
Answer:
1.0 is Answer
Explanation:
May be this is helpful!
3. A 240 mL sample of argon gas at 270 K is cooled until the volume is 180 mL. What is the new temperature?
Answer:
202.5 K
Explanation: