I believe it's (C). Valence electron pairs will move as far apart from each other as possible.
Explanation:
The formal definition that is the basis for VSEPR is as follows:
Pairs of electrons in the valence shell of a central atom of a molecule repel each other and take up positions as far apart as possible.
What type of wave has the SHORTEST wavelength and the highest frequency?
Answer:
The answer is gamma rays.
Explanation:
Gamma rays have the highest energies, the shortest wavelengths, and the highest frequencies on the electromagnetic spectrum.
How does natural selection, or the concept of “survival of the fittest,” affect us?
Answer:
I hope this helps you! :)
Explanation:
Survival of the fittest" is a popular term that refers to the process of natural selection, a mechanism that drives evolutionary change. Natural selection works by giving individuals who are better adapted to a given set of environmental conditions an advantage over those that are not as well adapted.
5) How many Kilograms are in 12 L of Chlorine Gas?
Answer: 0.03798 kilograms
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given volume}}{\text {Molar Volume}}=\frac{12L}{22.4L}=0.535moles[/tex]
1 mole of chlorine gas [tex](Cl_2)[/tex] weighs = 71 g
Thus 0.535 moles of chlorine gas [tex](Cl_2)[/tex] will weigh = [tex]\frac{71}{1}\times 0.535=37.98g=0.03798kg[/tex] (1kg=1000g)
Thus there are 0.03798 kilograms in 12 L of chlorine gas.
Given the [H+] = 3.89x10^-7M, what is the pOH?
Answer:
7.59
Explanation:
A lead mass is heated and placed in a foam cup caloriemeter containing 40.0mL of water at 17.0 C. The water reaches a temperature of 20.0 C. How many joules of heat were released by the lead?
the Answer is 502 Joules
when do electrons release photons
Answer:
Later when they are older
Explanation:
brainliest/
Dropping leaves in the fall is a characteristic of what type of tree?
A; deciduous
B; evergreen
C; coniferous
D; boreal
Answer:
A; deciduous
Explanation:
Trees that lose all of their leaves for part of the year are known as deciduous trees. Those that don't are called evergreen trees. Common deciduous trees in the Northern Hemisphere include several species of ash, aspen, beech, birch, cherry, elm, hickory, hornbeam, maple, oak, poplar and willow
Answer:
the answer is decidous trees
Convert 6.71 moles NH3 to number of molecules.
Answer: There are [tex]40.41 \times 10^{23}[/tex] molecules present in 6.71 moles of [tex]NH_{3}[/tex].
Explanation:
Given: Moles of [tex]NH_{3}[/tex] = 6.71 mol
According to the mole concept, 1 mole of every substance contains [tex]6.022 \times 10^{22}[/tex] molecules.
Therefore, molecules present in 6.71 moles are calculated as follows.
[tex]Molecules = moles \times 6.022 \times 10^{23}\\= 6.71 \times 6.022 \times 10^{23}\\= 40.41 \times 10^{23}[/tex]
Thus, we can conclude that there are [tex]40.41 \times 10^{23}[/tex] molecules present in 6.71 moles of [tex]NH_{3}[/tex].
What could be an electron configuration of Na in the excited state?
Answer:
The excited state electron configuration shows when an electron is excited and jumps into a higher orbital. For example, sodium in its excited state would have an electron configuration of 1s2 2s2 2p6 3p1, compared with its ground state of 1s2 2s2 2p6 3s1.
Explanation:
The balanced equation below represents a reaction between propane and oxygen. C3H8 + 5 O2 → 3 CO2 + 4 H2O According to this equation, which ratio of propane to oxygen is correct? 5 grams CO2 1 gram C3H8 3 moles CO2 1 mole C3H8 5 moles O2 1 mole C3H8 3 moles CO2 4 moles H2O
Answer:
5 moles O2 1 mole C3H8
Explanation:
In the question, it is mentioned about the ratio Propane and Oxygen. So the the ration will be 1:5 i.e, 5 moles of O2 1 mole C3H8. There is only one option which mentions both Propane and Oxygen and others doesn't.
According to Chargaff's Rule, if a segment of DNA contains 60 cytosine bases out of a total of 300 bases how many thymine bases are in the segment?
Answer:
90 Thymine bases
Explanation:
Chargaff's rules states that in the DNA of any organism, the amount of purine and pyrimidine bases must be in a 1:1 ratio. This means that the amount of Adenine and Guanine bases (purines) should be equal with their complementary pairs of Thymine and Cytosine bases respectively (pyrimidines). (A = T) + (G = C) = 100
Hence, according to this question, if there are 60 cytosine bases, this means that there will be 60 Guanine bases. 60 C + 60 G = 120 pyrimidines
300 total bases - 120 pyrimidine bases = 180 purine bases.
180/2 = 90 equal bases of Adenine and Thymine. Hence, Thymine bases will be 90.
What are carbohydrates?
A. a type of base
B. a type of glyceride
C. a type of macromolecule
D. a type of amino acid
Answer:
a
Explanation:
me say so
Answer:
C
Explanation:
The addition of 250.0 J to 30.0 g of copper initially at 22.0°C will change its temperature to what final value? (Specific heat of Cu= 0.387 J/g °C
Answer:
Final temperature = [tex]43.53^{\circ} C[/tex]
Explanation:
Given that,
Heat added, Q = 250 J
Mass, m = 30 g
Initial temperature, T₁ = 22°C
The Specific heat of Cu= 0.387 J/g °C
We know that, heat added due to the change in temperature is given by :
[tex]Q=mc\Delta T\\\\Q=mc(T_2-T_1)\\\\\dfrac{Q}{mc}=(T_2-T_1)\\\\T_2=\dfrac{Q}{mc}+T_1[/tex]
Put all the values,
[tex]T_2=\dfrac{250}{30\times 0.387}+22\\\\=43.53^{\circ} C[/tex]
So, the final temperature is equal to [tex]43.53^{\circ} C[/tex].
The enthalpy of a reaction is -1207 kJ/mol. Which of the following best
describes this reaction?
Answer:
D. Exothermic
Explanation:
The enthalpy, ΔH, of a reaction is defined as the change in heat when a reaction occurs.
A reaction with ΔH > 0 is called endothermic and requires energy to be produced
A reaction with ΔH < 0 is called exothermic and produce energy when occurs (An example is the combustion of octane that produce energy that is used in engines to produce movement)
As the enthalpy of the reaction is -1207kJ/mol (ΔH < 0) the reaction is:
D. ExothermicWhich best describes the role of the nephrons ?
Nephrons collect salts to be stored for later use by the body.
Nephrons signal the bladder to release excess urine.
O Nephrons transport urine to the bladder.
Nephrons restore the substances and water the body needs.
Answer:
c
Explanation:
edge 2021
Answer:
c
Explanation:
When a solution reaches the equivalence point in a titration, which of the following is NOT true?
A). [H+] is equal to [OH-]
B). pH is close to 7
C). The volume of the titrant will be equal to the volume of the analyte
D). The moles of H+ ions will be equal to the moles of OH- ions
Answer:
I think it's B). pH is close to 7
What is one difference between an electron and a neutron?
Answer: Neutron has no charge, electron has a charge and mass. Neutron occurs inside the nucleus where electron is seen outside the nucleus.
Explanation:
Which has a higher boiling point: CH3CH2CH3 or CH3CH2CH2OH? Explain.
Answer:
CH3CH2CH2OH
having more boiling point than CH
3
Define Acid and alkalis
Answer:
Acids have a pH less than 7. Acids contain lots of hydrogen ions
Alkalis have a pH greater than 7. Alkalis contain lots of hydroxide ions
Please mark as brainliest if answer is right
Have a great day, be safe and healthy
Thank u
XD
Answer:
ACID - A substance with particular chemical properties including turning litmus red, neutralizing alkalis, and dissolving some metals; typically, a corrosive or sour-tasting liquid of this kind. Often contrasted with alkali and base.
ALKALIS - A compound with particular chemical properties including turning litmus blue and neutralizing or effervescing with acids; typically, a caustic or corrosive substance of this kind such as lime or soda: Often contrasted with acid and base.
Hope this helps
WILL MARK BRAINLEISTTTT
HELPPPPPP
Substitute symbols and formulas for names and write balanced equations for each of the
reactions described below.
a) When copper(II) carbonate is heated, it forms copper(II) oxide and carbon dioxide gas.
b) Ammonium nitrate decomposes to water and dinitrogen monoxide.
c) Barium hydroxide reacts with carbon dioxide to form barium carbonate and water.
d) Sodium reacts with water to produce sodium hydroxide and hydrogen gas.
Answer:
jkrifhcuhixjck
gvudd
Explanation:
dugucdsorfooggigj
a CUCO3(s) + ( I don't have the symbol on my phone ) delta CUo(s) + CO2(g)
b NH4NO3➡️ HNo3 + H2O
c. Ba(OH)2+CO2 ➡️ BaCO3+H20
d Na +H20 ➡️NaOH +h2
Explanation:
I think this should be it , I think that 8s the symbol for hydrogen gas if its not correct I'm sorry
Which product is made from nonmetallic mineral resources?
a. Stainless steel
b. iron nails
c. Copper wires
d. concrete
Answer:
Concrete
Explanation:
what is the chemical name for Se8O7
Answer:
Selenium oxide
Explanation:
2. Explain how an ionic bond is formed. Use the words "metal", "transfer", "nonmetal”, “cation", "anion" and
"attraction" in your description
Forming an Ion Ionic bonds are a class of chemical bonds that result from the exchange of one or more valence electrons from one atom, typically a metal, to another, typically a nonmetal. This electron exchange results in an electrostatic attraction between the two atoms called an ionic bond.
Detergent is an example of what type of compound?
A.) synthetic organic compound
B.) organic compound
C.) chlorofluorocarbon
Answer : A
Explanation : Surface-active compounds/agents (surfactants) Substances which have the effect of reducing the surface tension of a solvent, an example being a detergent/surfactant or soap dissolved in water. ... Both synthetic detergents and soaps are surfactants. Surfactants See "Surface-active compounds/agents".
According to the context, a detergent is an example of a synthetic organic compound.
What is a detergent?They are a group of synthetic organic compounds that have the property of lowering the surface tension of the liquids in which they are dissolved.
These contain surfactant substances that help in penetration, soaking, emulsification, dispersion, solubilization.
Therefore, we can conclude that according to the context, a detergent is an example of a synthetic organic compound.
Learn more about synthetic organic compound here: https://brainly.com/question/13049450
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On the pH scale higher numbers indicate ?
Answer:
Higher numbers indicate bases- not acidic/less acidic
Explanation:
Answer:
higher the ph number means stronger base
Explanation:
2 P + 5 Cl2=2 PCl3 +886.0 kJ
How much energy will be produced when 1.382 mol P reacts with excess
Cl2?
Answer:
612.2kJ are produced
Explanation:
Based on the reaction:
2P + 5Cl₂ → 2PCl₃ + 886.0kJ
When 2 moles of P react with an excess of chlorine 886.0kJ are produced (That is 886.0kJ / 2mol P).
To solve this question we must use the last statement as follows:
1.382mol P * (886.0kJ / 2mol P) =
612.2kJ are producedWhat is the OH- ion concentration, in moles per liter, of an aqueous solution with a pH of 7?
A. 1 × 10-14
B. 1 × 10-7
C. 7
D. 14
Answer:
B
Explanation:
the pH scale is based on the function
1x10-14
So since pH is neutral the concentration of OH and H must be equal hence the only option in which the concetration would [OH]{H}= 1x10-14 would be when both are equal so it cannot be a or d and when they are expressed in concetration so the only option is B.
The pH of the solution can be used to give the relation between the pOH and the hydroxide ion concentration. The concentration of hydroxide ions is 1 ×10⁻⁷. Thus, option B is correct.
What is pOH?pOH is the measure of the hydroxide ion in the solution. The hydroxide concentration from pH is related as:
pH = - log [H⁺]
[H⁺] = 10⁻⁷
= 1 × 10⁻⁷
The hydroxide concentration from hydrogen concentration is calculated as:
[H⁺][OH⁻] = 1 × 10⁻¹⁴
[OH⁻] = (1 × 10⁻¹⁴) ÷ (1 × 10⁻⁷)
= 1 ×10⁻⁷
Therefore, option B. 1 ×10⁻⁷ is the hydroxide ion concentration.
Learn more about hydroxide concentration here:
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What is an Independent Variable (IV)? *
here's your answer dear friend❤❤
A sample of crushed rock is found to have 4.81 x10^21 atoms of gold. How many moles of gold are present in this sample?
Answer:
0.8 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
We have
[tex]n = \frac{4.81 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{4.81}{6.02} \\ = 0.799003...[/tex]
We have the final answer as
0.8 molesHope this helps you
Select the correct image.
The image shows the embryonic development of four different types of vertebrates. Which developmental path is most likely that of a lizard?
Answer:
what image?????
Explanation:
?
Answer:
2nd image/ image B