Answer:
In chemistry, orbital hybridisation (or hybridization) is the concept of mixing atomic orbitals into new hybrid orbitals (with different energies, shapes, etc., than the component atomic orbitals) suitable for the pairing of electrons to form chemical bonds in valence bond theory. Hybrid orbitals are very useful in the explanation of molecular geometry and atomic bonding properties and are symmetrically disposed in space. Although sometimes taught together with the valence shell electron-pair repulsion (VSEPR) theory, valence bond and hybridisation are in fact not related to the VSEPR model.
Pls help !
What happens to the speed of a tsunami wave as it approaches the shore?
It increases and then decreases.
It increases.
It remains at a constant speed.
It decreases.
Which term represents when a tsunami wave slows down as it reaches shore?
surfing
waving
sinking
shoaling
Answer: It decreases.
Explanation:
A constant volume of oxygen is heated from 100oC to 185 oC. The initial pressure is 4.1 atm. What is the final pressure?
Therefore, the final pressure of the oxygen is 5.51 atm.
How is the ideal petrol rule applied in real-world situations?Let's say an engineer wants to keep 500 g of oxygen at 1 atm and 125 degrees Fahrenheit in a container. The Ideal Gas Law is used to calculate the required capacity of a container before construction can begin.
Assuming that the oxygen behaves as an ideal gas and the volume is constant, we can use the ideal gas law to solve for the final pressure.
The ideal gas law states that:
PV = nRT
where:
P = pressure
V = volume
n = number of moles
R = gas constant
T = temperature
Since the volume is constant, we can rewrite the ideal gas law as:
P1/T1 = P2/T2
where:
P1 = initial pressure
T1 = initial temperature
P2 = final pressure
T2 = final temperature
We can plug in the given values and solve for the final pressure:
P1/T1 = P2/T2
4.1 atm / (100 + 273) K = P2 / (185 + 273) K
P2 = (4.1 atm / 373 K) * (185 + 273) K
P2 = 5.51 atm
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A molecule has two bonded atoms around the central atom. The central atom does not have any lone pairs. What is the geometry of the molecule?
Bent
Linear
Trigonal planar
Tetrahedral
Answer:
I think Tetrahedral
Explanation: HaHa I D K
Answer:
Linear
Explanation:
Because it has zero lone pairs and only two atoms.
1. A weather balloon with a volume of 2000L at a pressure of 96.3 kPa rises and the pressure
decreases to 60.8kPa. Assuming there is no change in the temperature or the amount of gas,
calculate the weather balloon's final volume.
Answer:
3167 .8 liters
Explanation:
P1 V1 = P2 V2
96.3 * 2000 = 60.8 * V2 solve for V2 =3167.8 l
Which pair of formulas represents two compounds that are electrolytes?
C5H12 and CH3OH
HCl and NaOH
HCl and CH3OH
C5H12 and NaOH
The pair of formulas represents two compounds that are electrolytes are HCl & NaOH.
What are electrolytes?Electrolytes are the solutions which contains positive or negative ions in it as a result of which it conducts electricity.
C₅H₁₂ & CH₃OH are not electrolytes as they will not dissociate into their respective ions.HCl & NaOH both are electrolytes as they dissociate into their ions in the solution form.Among HCl & CH₃OH, only HCl is a electrolyte and methanol is a non electrolyte.Among C₅H₁₂ & NaOH, NaOH is a electrolyte and C₅H₁₂ is a non electrolyte.Hence pair of electrolytes are HCl & NaOH.
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What type of charge do electrons have?
negative charge
positive charge
no charge
atomic charge
Answer:
negative charge
Explanation:
Neutrons have no charge, protons have positive charge, and electrons have a negative charge
Understanding the theory of plate tectonics can help people better understand Earth
movements. How can knowledge of plate tectonics help people living in areas prone to
earthquakes and volcanic eruptions?
Understanding the theory of plate tectonics can make people more prepared if a natural disaster occurs. By understanding the theory of tectonic plates, you can possibly predict when the next tectonic-plate related natural disaster will occur.
Is Fe^+2 the same ion as Fe^2+?
Yes, it doesn't matter if you put the number first or the sign first therefore... +2 = 2+
No, Fe^+2 is a cation and Fe^2+ is an anion
Answer:
It doesn't matter because either or it's still a cation because its positive
Which of the following ions is least likely to form colored compounds?
A) V^(4+)
B) La^(3+)
C) Ti^(2+)
D) Mn^(3+)
E) Cr^(3+)
Answer:
i think d maybe correct me if im wrong
Explanation:
La³⁺ ions are colorless compounds because they have a 4f⁰ electronic configuration. Therefore, option (B) is correct.
What are lanthanoids?The lanthanide series comprises 15 metallic chemical elements with atomic numbers 57 to 71, from lanthanum through the lutetium. These elements have chemically similar elements scandium and yttrium, which are often collectively called rare-earth elements.
The chemical symbol Ln can be used to refer to any lanthanide. They are f-block elements, corresponding to the filling of the 4f-shell. All lanthanoids form trivalent cations, Ln³⁺ are determined by the ionic radius, which decreases from lanthanum to lutetium.
The valence orbitals in lanthanides have f → f transitions that are much weaker and narrower than d → d transitions. In general, the colors of lanthanide complexes are far fainter than transition metal complexes.
The electronic configuration of the lantanum is [Rn]5d¹6s². In the +3 oxidation state, it has all shells fully filled therefore, no electron transitions are possible. Therefore, La³⁺ form colorless compounds.
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Calculate the root mean square velocity, in m/s, of carbon dioxide molecules at 100.0
Answer:
459.8m/s
Explanation:
T=Temperature in Kelvin
M=molar mass in kg/mol
Molar mass of CO2,
mm=44.01g/mol
=0.04401kg/mol
T =100.0C
= (100.0 +273) K
=373K
So,
vrms= sqrt(3×R×T/M)
vrms=sqrt(3×8.314×373.0/0.04401)
=459.8m/s
difference between saturated unsaturted and supersaturatted
Explanation:
Unsaturated solution: A solution with less solute that completely dissolves without leaving any remaining substance
Saturated solution: A solution with solute that dissolves until it can't dissolve anymore, leaving some of the remaining substance left.
Supersaturated solution: A solution that has more remaining substance left than a saturated solution and tends to crystallize more than a saturated solution.
compare the boiling point of water at sea leavel to the boiling point in denver (altitude = 1 mile) Explain
Answer:
boiling point decreases in denver
Explanation:
in higher places
theres less atmospheric pressure
it takes less energy to bring water to the boiling point.
Less energy means less heat
which means water will boil at a lower temperature
wonderopolisorg
Which scenario would adhere to the law of conservation of energy?
Examples of scenarios that would adhere to the law of conservation of energy are as follows:
In a loudspeaker, electrical energy is converted into sound energy.In a microphone, sound energy is converted into electrical energy.In a generator, mechanical energy is converted into electrical energyWhat is law is conservation of energy?The law of conservation of energy states that energy cannot be created nor destroyed but is conserved when it is transferred from one form to another.
The law of conservation of energy is obeyed by majority of natural and artificial systems. For example;
In a loudspeaker, electrical energy is converted into sound energy.In a microphone, sound energy is converted into electrical energy.In a generator, mechanical energy is converted into electrical energyLearn more about law of conservation of energy at: https://brainly.com/question/20971995
Answer:
Answer is D on edge 2022
Explanation:
pls help mee with this
Answer:
C. Shield Volcano
Explanation:
Flow after flow pours out in all directions from a central summit vent, or group of vents, building a broad, gently sloping cone of flat, domical shape, with a profile much like that of a warrior's shield.
Bonding with intermolecular forces:
1.) is CH3I a hydrogen bonding? yes or no?
2.) is CH3I dipole-dipole interactions? Yes or no?
3.) is CH3I a london dispersion forces? Yes or no?
Answer:
1. yes
2. yes
3. no
hope this helps
sorry if I am wrong
The question is in the attached screenshot. Thanks a lot
Answer:
your welcome
Explanation:
Describe How did the sun form?
The Sun formed about 4.6 billion years ago in a giant, spinning cloud of gas and dust called the solar nebula. As the nebula collapsed under its own gravity, it spun faster and flattened into a disk.
Answer:
in space billons of year ago dust particles together to create solar nebula also the sun made with helium and hydrogen the sun will run out of energyhope it's helpful thanks
Convert the following 59m to nm
Explanation:
[tex]1m = {10}^{ 9} nm[/tex]
[tex]59m = 59 \times {10}^{9} nm[/tex]
I hope it helped you
5.9 × 10⁹
Explanation:
1m = 10^-9 nm
=5.9 × 10⁹
=5.9 × 1 000 000 000
=5 900 000 000 nm
=5.9 ×10⁹
Which is a property of acids in aqueous solutions?
O They feel soapy.
O They taste bitter.
They increase the concentration of H* ions.
O They decrease the concentration of H* ions.
Answer:
2 and 3
Explanation:
acids are known for being H+ donors so they increase concentration of h+ ions
What volume of it must be diluted with water to obtain 500cm 3 of 0.01 molar solution. If the stock solution is 1.0 M?
Answer:
5 cc
Explanation:
.01 M * 500/1000 = .005 M needed
1.0 M * x .005 M
x =.005 liter 5 cc
5cc of 1M dilute to 500 cc
The concentration or volume of a solution can be determined from the molarity and volume of the second solution. The volume the solution of 1 M to prepare 500cm³ of 0.01 molar solution is 5 molar.
What is molarity?Molarity of a solution is its concentration in terms of number of moles per unit volume. Molarity depends on the temperature and amount of solute and solvent as well.
If a solution have M1 molarity and V1 volume and a second solution have M2 volume and V2 volume then the relation between these quantities is written as follows:
M1V1 = M2V2
Given that solution to be prepared has the concentration of 0.01 M and volume of 500 cm³. Then the volume of stock solution with 1.0 M concentration is calculated as follows:
500cm³ × 0.01 M = 1.0 M × V2
V2 = (500cm3 × 0.01 M )/1.0 M
= 5 cm³
Hence, the volume of stock solution is 5 cm³ required for the preparation of 500cm³ of 0.01 molar solution.
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is KNO a strong acid?
Answer:
First of all, it's KNO₃ not KNO.
Second, KNO₃ is neither an acid nor it is a base, infact, it is a salt and therefore it's neutral.
hope that helps...
N₂O(g) + 3 H₂(g) N₂H4(1) + H₂O(1) AH = -317 kJ/mol
and standard heats of formation:
N₂O(g) +82.1 kJ/mol
H₂O(1) 285.8 kJ/mol.
What is the standard heat of formation of hydrazine (N₂H4(1)) ?
Select one:
O a. 50.9 kJ/mol
O b. - 520.7 kJ/mol
O c. 113.3 kJ/mol
O d. - 50.9 kJ/mol
e. 113.3 kJ/mol
Answer:
A
Explanation:
Recall that ΔH is the sum of the heats of formation of the products minus the heat of formation of the reactants multiplied by their respective coefficients. That is:
[tex]\displaystyle \Delta H^\circ_{rxn} = \sum \Delta H^\circ_{f} \left(\text{Products}\right) - \sum \Delta H^\circ_{f} \left(\text{Reactants}\right)[/tex]
Therefore, from the chemical equation, we have that:
[tex]\displaystyle \begin{aligned} (-317\text{ kJ/mol}) = \left[\Delta H^\circ_f \text{ N$_2$H$_4$} + \Delta H^\circ_f \text{ H$_2$O} \right] -\left[3 \Delta H^\circ_f \text{ H$_2$}+\Delta H^\circ_f \text{ N$_2$O}\right] \end{aligned}[/tex]
Remember that the heat of formation of pure elements (e.g. H₂) are zero. Substitute in known values and solve for hydrazine:
[tex]\displaystyle \begin{aligned} (-317\text{ kJ/mol}) & = \left[ \Delta H^\circ _f \text{ N$_2$H$_4$} + (-285.8\text{ kJ/mol})\right] -\left[ 3(0) + (82.1\text{ kJ/mol})\right] \\ \\ \Delta H^\circ _f \text{ N$_2$H$_4$} & = (-317 + 285.8 + 82.1)\text{ kJ/mol} \\ \\ & = 50.9\text{ kJ/mol} \end{aligned}[/tex]
In conclusion, our answer is A.
Which type of science is the study of living things and living systems?
A. Life science
B. Physical science
C. Earth science
D. Space science
Where is the friction that allows the skater to complete the move that is occurring in this image?
a girl ice skating
© Wildcow / iStock 2018
The movement of her skirt through the air
The movement of her body through the air
The point of contact between the skates and the ice
The point of contact between the skates and her foot
Answer:
The point of contact between the skates and the ice.
Explanation:
It's obvious because friction is the contact between two surfaces.
I really need an answer by tonight!
Water circulation created by prevailing wind systems. The Gulf Stream is an example.
The length of open sea over which wind can blow steadily to create waves.
The amount of dissolved salt in a liquid.
The distance from the crest of one wave to the crest of another.
Water circulation created by differences in density.
This is what moves forward and through a wave.
The cyclical process of the changing state and movement of water around the Earth through evaporation, condensation, and precipitation.
As the amount of salt in water increases, the density of the water _________.
The type of energy possessed by moving water.
The rising of ocean water bringing nutrients up from the deep
1.
The water cycle
2.
vapor transport
3.
salinity
4.
increases
5.
decreases
6.
surface currents
7.
Coriolis Effect
8.
deepwater currents
9.
trough
10.
wave period
11.
wavelength
12.
water molecules
13.
energy
14.
crest
15.
fetch
16.
electrical
17.
kinetic
18.
downwelling
19.
upwelling
The water cycle iss a process which helps to circulate and replenish water on earth.
What is hydrology?Hydrology is the scientific study of water bodies , the changes that occur in them as well as the various features and behavior of water bodies such as oceans and rivers.
Water circulation created by prevailing wind systems. The Gulf Stream is an example up of the Coriolis effect.
The length of open sea over which wind can blow steadily to create waves is called fetch.
Salinity is the amount of dissolved salt in a liquid
The distance from the crest of one wave to the crest of another is called wavelength
Water circulation created by differences in density deepwater currents
Energy is what moves forward and through a wave.
The cyclical process of the changing state and movement of water around the Earth through evaporation, condensation, and precipitation is called water cycle.
As the amount of salt in water increases, the density of the water increases.
The type of energy possessed by moving water is called kinetic energy.
The rising of ocean water bringing nutrients up from the deep us called upwelling.
Therefore, the water cycle helps to circulate and replenish water on earth.
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How much more would a 20.0 gallon tank for propane
(C3H3) weigh if it was originally empty, 1 gallon = 3.8 L, but now has a
pressure of 2.4atm at a temperature of 27 Celsius?
Give your answer in grams.
Answer: 20 + 1 + 3.8 + 2.4 +27 = 54.2
Explanation: 20 gallons plus 1 gallon plus 3.8 plus 2.4 plus 27 equals to a total number of 54.2 gallons for the propane.
Direct ethanol fuel cells (DEFCs) have shown some promise as a viable option for providing "green" energy to small electrical devices. Calculate E° for the reaction that takes place in DEFCs:
C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(l)
Use the following values.
∆G°H2O(l) = -237 kJ/mol
∆G°O2(g) = 0 kJ/mol
∆G°CO2(g) = -394 kJ/mol
∆G°C2H5OH(l) = -175 kJ/mol.
Eo = ? V
The emf of the cell from the reactions and the change in free energy is 2.8 V.
What is the Eocell?The Eocell refer to the emf of the cell under standard conditions. In this case, it can be obtained from the free energy of the values of the reactants and products.
Now, given; C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(l)
ΔG°rxn = [2(-394) + 2( -237)] - [( -175 ) + 0 ]
= [(-788) + (-474)] + 175
= -1087 kJ/mol
Also;
ΔG° = -nFEocell
Eocell = ΔG° /-nF
Eocell = -1087 * 10^3/-(4 * 96500)
Eocell =-1087 * 10^3/386000
= 2.8 V
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Which of the following compounds' solubility will not be affected by a low pH in solution?
O AgBr
O NICO3
O CO(OH)2
O PbF2
O Cus
The compound solubility which will not be affected by a low pH in solution is AgBr.
What is pH?pH is a measure of the acidity or basicity of any solution and according to the pH scale 0 to 6.9 shows the acidity, 7 is neutral and 7.1 to 14 shows the basicity of any solution.
AgBr is sparingly soluble in water and not soluble in acids, so if we low the pH of the solution towards the acidity its solubility not affected.NiCO₃ is a basic salt and and shows solubility in the acidic medium so change in pH will affect its solubility.Co(OH)₂ it is also a basic compound and shows its solubility in the acidic medium and get affected when change in pH takes place.PbF₂ is a strong base and also shows solubility in the acidic medium easily, so get affected when change in pH takes place.In CuS, sulphide is basic ion and whole compound shows solubility in the acidic medium and get affected when low pH of solution takes place.AgBr is not affected by a low pH in solution.
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What is the total energy required to break all the bonds in 1 mol hexane, c6h14
The enthalpy of formation or the total energy required to break all the bonds in 1 mol hexane and has a value of -198.67 kJ.
What is the energy of bond breaking?The energy of bond breaking is the energy required to break all the bonds in 1 mole of a substance.
This energy is also the energy required to form the bonds known as enthalpy of formation of that substance.
Therefore, the total energy required to break all the bonds in 1 mol hexane is known as it enthalpy of formation and has a value of -198.67 kJ.
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How many grams of KBr are dissolved in 92.7 mL of a 0.955 M solution? Show your work.
Answer:
10.5g of KBr
Explanation:
molarity = moles of solute / litres of solution
we are given the volume of the solution in milliliters but the formula uses litres so we have to convert
to convert to liters we divide the number of milliliters by 1000 ( because 1 liter has 1000 milliliters. )
so liters of solution = 92.7/1000 = 0.0927 L
we can now plug in what we are given and solve for moles of solute
recall molarity = moles of solute / litres of solution
molarity = 0.955M and liters of solution = 0.0927L
so [tex]0.955M=\frac{moles.of.solute}{0.0927L}[/tex]
multiply both sides by 0.0927
we're left with moles of solute = 0.0885285 moles
Finally we must convert moles to grams
Molar mass of KBr = 39.0983 + 79.904 = g/mol
Using dimensional analysis we get [tex]\frac{0.0885285molKBr}{} *\frac{119.002g}{1molKBr}[/tex]
the mol KBr cancel out on both sides and we get [tex]0.0885285 *119.002g[/tex] which is equal to 10.5g (rounded)
So we can conclude that 10.5g of KBr is dissolved in 92.7mL of a 0.955M solution.