the molecular geometry of a water molecule is [ select ] , including [ select ] lone pairs of electrons. this causes the overall shape of the molecule to be [ select ] . each bond in the water molecule is [ select ] and the overall molecule is [ select ] . bonds between separate water molecules are [ select ] bonds.
Answers
Water molecule has distorted tetrahedral geometry. O atom has 2 lone pairs and 2 bond pairs of electrons.
What is electrons?The electric charge of the electron, a subatomic particle, is a negative one elementary charge. Since they have no known components or substructure, electrons, which are part of the lepton particle family's first generation, are typically regarded to be elementary particles. The proton's mass is around 1836 times greater than that of the electron.
The electron's inherent angular momentum (spin), which is measured in terms of the scaled-down Planck constant,, is one of its quantum mechanical properties. The Pauli exclusion principle states that because electrons are fermions, no two of them may be in the same quantum state. Since they can collide with other particles and can be diffracted like light, electrons share characteristics with all elementary particles.
To learn more about electrons from the given link:
https://brainly.com/question/860094
#SPJ4
Related Questions
What is the charge on an electron?
Answers
Answer:
1.60217663 × 10-19 coulombs
Explanation:
The electron is the lightest known stable subatomic particle.
It has a negative charge that is equivalent to 1.602176634 coulombs, which is regarded as the fundamental unit of electric charge.
Ca(ClO4)2
Ionic compound name
Answers
Answer:
I thing Calcium Perchlorate
how to tell which planet on this chart has the most gravitational force
Answers
Answer:
yep still Jupiter I believe!! :)))
A liquid is allowed to evaporate and leaves no residue. can you determine whether it was an element, a compound, or a mixture?
Answers
A liquid is allowed to evaporate and leaves no residue. It can not be determined whether it was an element, a compound, or a mixture.
A water vapor molecule stays roughly 10 days in the atmosphere after it has evaporated. Water vapor starts to cool back down as it ascends higher in the atmosphere. The water vapor condenses when it becomes cold enough, turning it back into liquid water. Eventually, individual water droplets will condense to create clouds and precipitation.
It is not possible to determined whether it would be an element, a compound and mixture because the size of the particle will be too less.
A method for separating homogenous mixtures with one or even more dissolved salts is called evaporation. The procedure separates the liquid from the solid components. Usually, the procedure entails heating the combination until there is no more liquid is present.
Therefore, it can not be possible to determined whether it was an element, a compound, or a mixture by evaporation.
To know more about liquid
https://brainly.com/question/25579356
#SPJ4
find [oh−][oh−] in 6 m . naoh.6 m aq. naoh. [oh−]=
Answers
The concentration of NaOH is given as 6 M.
To find the [OH⁻] concentration in a 6 M NaOH solution. Here's a step-by-step explanation:
1. First, note that NaOH is a strong base, which means it dissociates completely in water. The dissociation equation is:
NaOH → Na⁺ + OH⁻
2. In a 6 M NaOH solution, the concentration of NaOH is 6 moles per liter.
3. Since the dissociation of NaOH is a 1:1 ratio, this means that for every mole of NaOH, one mole of OH⁻ is produced.
4. Therefore, the concentration of OH⁻ ions ([OH⁻]) in the 6 M NaOH solution is also 6 moles per liter, or [OH⁻] = 6 M.
So, the [OH⁻] concentration in a 6 M NaOH solution is 6 M.
To know more about the concentration, click below.
https://brainly.com/question/28971310
#SPJ11
The volume of a sample of hydrogen gas at 0. 997 atm is 5. 00 L. What will be the new volume if the pressure is decreased to 0. 977 atm? Temperature is constant
Answers
Answer: 5.10 L
Explanation:
A rock has a mass of 15 grams and a
volume of 3 cm3. What is the density of the
rock?
HINT; The formula for density is:
density =
mass (g)
volume (cm)
A А
B
5 g/cm3
18 g/cm3
45 g/cm3
Answers
Answer:
5 g/cm3
Explanation:
Density = mass/volume
density = 15g / 3 cm3 = 5g/cm3
Answer:
3.34 g/cm3
Explanation:
A buffered solution is made by adding 75.0 g of sodium acetate (NaC2H3O2) to 500.0 mL of a 0.64 M acetic acid solution. What is the pH of the final solution? Assume no volume change. For acetic acid, K_{a} = 1.8 * 10 ^ - 5
Answers
The pH of the final buffered solution is approximately 5.20.
To determine the pH of the buffered solution, we need to calculate the concentration of acetic acid (HC2H3O2) and acetate ion (C2H3O2-) in the final solution. The Ka value for acetic acid is given as 1.8 × 10^-5. Here are the step-by-step calculations:
Step 1: Calculate the moles of sodium acetate (NaC2H3O2):
Molar mass of NaC2H3O2 = 82.03 g/mol
Mass of NaC2H3O2 = 75.0 g
Number of moles of NaC2H3O2 = mass / molar mass
Number of moles of NaC2H3O2 = 75.0 g / 82.03 g/mol
Number of moles of NaC2H3O2 = 0.914 mol
Step 2: Calculate the volume of the acetic acid solution in liters:
Volume of acetic acid solution = 500.0 mL
Volume of acetic acid solution = 500.0 mL / 1000 mL/L
Volume of acetic acid solution = 0.500 L
Step 3: Calculate the concentration of acetic acid (HC2H3O2) in the final solution:
Concentration of acetic acid = 0.64 M
Since no volume change occurs upon adding sodium acetate, the final volume of the solution is still 0.500 L. Therefore, the final concentration of acetic acid remains the same: 0.64 M.
Step 4: Calculate the concentration of acetate ion (C2H3O2-) in the final solution:
Acetate ion (C2H3O2-) is provided by the dissociation of sodium acetate (NaC2H3O2) in water. Sodium acetate is a strong electrolyte and dissociates completely in water.
The number of moles of C2H3O2- is equal to the number of moles of NaC2H3O2, which is 0.914 mol.
Concentration of acetate ion = moles / volume
Concentration of acetate ion = 0.914 mol / 0.500 L
Concentration of acetate ion = 1.828 M
Step 5: Calculate the pH of the buffered solution using the Henderson-Hasselbalch equation:
pH = pKa + log([C2H3O2-] / [HC2H3O2])
pKa = -log(Ka) = -log(1.8 × 10^-5) = 4.74 (approximated to two decimal places)
pH = 4.74 + log(1.828 M / 0.64 M)
pH = 4.74 + log(2.858)
pH ≈ 4.74 + 0.456
pH ≈ 5.20
Therefore, the pH of the final buffered solution is approximately 5.20.
learn more about pH on the link:
https://brainly.com/question/12609985
#SPJ11
Which type of molecule supports a tree's tall structure?
A. Polysaccharide
B. Polypeptide
C. Monosaccharide
D. Protein
Answers
Answer: The type of molecule that supports a tree's tall structure is A. polysaccharide.
Explanation:
Polysaccharides are macromolecules consisting of many monosaccharide units. The Oxygen- hydrogen groups that make up the monomers such as glucose can form hydrogen bonds with cellulose molecules. These hydrogen bonds formed, allows for the cellulose strands to form fibres, providing trees and other plants.
Therefore, polysaccharides are molecules that supports a tree's tall structure.
IM IN A TEST PLS HELP
A solution of the acid contains hydrogen ions. Write an ionic equation for the reaction of sodium with the hydrogen ions in the acid. Include state symbols in your answer.
Answers
Answer:
The thing to recognize here is the fact that you're dealing with a neutralization reaction that features sodium hydroxide,
NaOH
, a strong base, and hydrochloric acid,
HCl
, a strong acid.
This tells you that the two reactants will dissociate completely in aqueous solution to produce cations and anions. More specifically, you will have
NaOH
(
a
q
)
→
Na
+
(
a
q
)
+
OH
−
(
a
q
)
HCl
(
a
q
)
→
H
+
(
a
q
)
+
Cl
−
(
a
q
)
Now, when these two solutions are mixed, the hydroxide anions produced by the strong base and the hydrogen ions produced by the strong acid will neutralize each other to produce water.
The sodium cations and the chloride anions act as spectator ions because they are present on both sides of the chemical equation as ions.
You can tell that this is the case because sodium chloride,
NaCl
, one of the two products of the reaction, is soluble in aqueous solution.
So, the complete ionic equation will be
H
+
(
a
q
)
+
Cl
−
(
a
q
)
+
Na
+
(
a
q
)
+
OH
−
(
a
q
)
→
Na
+
(
a
q
)
+
Cl
−
(
a
q
)
+
H
2
O
(
l
)
To get the net ionic equation, simply remove the spectator ions
H
+
(
a
q
)
+
Cl
−
(
a
q
)
+
Na
+
(
a
q
)
+
OH
−
(
a
q
)
→
Na
+
(
a
q
)
+
Cl
−
(
a
q
)
+
H
2
O
(
l
)
You will end up with
H
+
(
a
q
)
+
OH
−
(
a
q
)
→
H
2
O
(
l
)
SIDE NOTE You will sometimes see the hydrogen ion being replaced by the hydronium ion,
H
3
O
+
.
In this case, the dissociation of hydrochloric acid is represented by the chemical equation
HCl
(
a
q
)
+
H
2
O
(
l
)
→
H
3
O
+
(
a
q
)
+
Cl
−
(
a
q
)
The net ionic equation will now take the form
H
3
O
+
(
a
q
)
+
OH
−
(
a
q
)
→
2
H
2
O
(
l
)
which of the following accurately describes the ph scale? which of the following accurately describes the ph scale? the ph scale runs from 0 (neutral) to 14 (most acidic), with 7 as an average acidity level. the ph scale runs from 0 (most acidic) to 14 (neutral), with 7 as an average acidity level. the ph scale runs from 0 (most basic) to 14 (most acidic), with 7 as a neutral. the ph scale runs from 0 (most acidic) to 14 (most basic), with 7 as a neutral.
Answers
Answer:
The pH scale measures acidity of a substance. known as potential of hydrogen, it varies from 0 to 14 with 7 being the pH value of a neutral solution. Below 7 shows the substance is acidic in nature and above 7 is alkaline in nature. pH 0-3 are considered strong acids while pH 4-6 are weak acids. pH 8-10 are weak alkalines and pH 11-14 are strong alkalines. This is a general trend and there may be exeptions especially if the substance has a negative pH. However, it would not be covered likely unless you are doing university chemistry.
how much water should be added to 28 ml of 15% alcohol solution to reduce the concentration to 14%?
Answers
The amount of water that should be added to 28 ml of 15% alcohol solution to reduce the concentration to 14% is: 2 ml
To solve this problem, the formula and the procedure that we have to use is:
c1 * v1 = c2 * v2
Where:
c1= concentration of the concentrated solutionv1 = volume of the concentrated solutionc2 = concentration of the diluted solutionv2 = volume of the diluted solutionInformation about the problem:
c1 = 15%v1=28 mlc2 = 14%v2=?amount of water should be added=?Applying the dissolution of concentrations formula and clearing the volume of the diluted solution (v2) we get:
c1 * v1 = c2 * v2
v2 = (c1 * v1)/ c2
v2 = (15% * 28 ml)/ 14%
v2= 30 ml
In order to know how much water should be added we have to subtract 28 ml from the volume of the diluted solution:
amount of water should be added = v2 - v1
amount of water should be added = 30 ml - 28 ml
amount of water should be added = 2 ml
What is a solution?In chemistry a solution is known as a homogeneous mixture of two or more components called:
Solvent: it usually is in a major amount than the soluteSolute: it usually is in less amount than the solventLearn more about chemical solution at: brainly.com/question/13182946
#SPJ4
The way Earth's rotation makes winds curve.
Answers
Answer:
it is called the prevailing westerlies
Explanation:
If the North Pole is tilting away from the sun, what season is it experiencing?
Answers
Answer:
Winter
Explanation:
Answer:
winter
Explanation:
because it is away from the sun
3a. mass concentration of H 2
O in the air when mole fraction of water in the air is 2 percent. P=1 atm at 15 ∘
C (pick the most reasonable unit associated with your answer) 3b. Mass concentration of oxygen atoms in this gas in μg per cubic meter
Answers
3a. The mass concentration of H2O in the air when mole fraction of water in the air is 2 percent at P=1 atm at 15 ∘C is 13.5 g/m³.
3b. The mass concentration of oxygen atoms in this gas is 1909.85 μg/m³.
3a. Given: Mole fraction of water in the air = 2%
Pressure, P = 1 atm
Temperature, T = 15 ∘C
We can find the mass concentration of H2O using the formula:
mass concentration = (partial pressure of H2O) / (RT) x MW x 1000
Where, R = 0.0821 L atm mol-1 K-1
T = 15 + 273 = 288 KMW of H2O = 18 g/mol
The partial pressure of H2O can be calculated using Dalton's law of partial pressure:
P H2O = mole fraction of H2O x total pressure
= 0.02 x 1 atm
= 0.02 atm
Substitute the values into the mass concentration equation:
mass concentration = (0.02 atm) / (0.0821 L atm mol-1 K-1 × 288 K) × (18 g/mol) × 1000
= 13.5 g/m³
Therefore, the mass concentration of H2O in the air when mole fraction of water in the air is 2 percent at P=1 atm at 15 ∘C is 13.5 g/m³.
3b. Given:
Pressure, P = 1 atm
Temperature, T = 15 ∘C
We need to find the mass concentration of oxygen atoms in this gas. For this, we first need to find the mole fraction of oxygen. We can use the following formula:
mole fraction of oxygen = 1 - (mole fraction of water + mole fraction of other gases)
Mole fraction of water = 2/100 = 0.02
Mole fraction of other gases = 1 - mole fraction of water
= 1 - 0.02
= 0.98
At standard conditions, 1 mole of gas occupies 22.4 L.
But at given conditions (P=1 atm and T=15 ∘C),
the volume occupied by 1 mole of gas can be found using the following equation:
PV = nRTV = (nRT) / PM
where, V = volume of 1 mole of gas
n = number of moles of gas
R = universal gas constant = 0.0821 L atm mol-1 K-1
T = 15 + 273 = 288 K
Now, we can find the number of moles of oxygen atoms using the following formula:
number of moles of oxygen atoms = (mass concentration of other gases) / (MO of O2)
Where, MO of O2 = 32 g/mol
Now, we can calculate the mass concentration of oxygen atoms using the following formula:
mass concentration of oxygen atoms = (number of moles of oxygen atoms) × (MO of O2) × (1000 μg/mg) / (volume of 1 mole of gas)
Substitute the values into the above equations:
V = (1 × 0.0821 × 288) / 1
= 23.74 L/mol
Number of moles of oxygen atoms = (0.98) / (32 g/mol)
= 0.030625 mol
Mass concentration of oxygen atoms = (0.030625 mol) × (32 g/mol) × (1000 μg/mg) / (23.74 L/mol)
= 1909.85 μg/m³
Therefore, the mass concentration of oxygen atoms in this gas is 1909.85 μg/m³.
To know more about mole fraction visit:
https://brainly.com/question/30724931
#SPJ11
What are the components of the land-based carbon cycle?
Answers
Answer:
Human exhale
Explanation:
When humans exhale-carbon is that which all humans produce=18% of all carbon output
{{c1::Epimers}} are diasteromers that differ at only one carbon
Answers
that epimers are diastereomers that differ at only one carbon. An explanation for this is that diastereomers are stereoisomers that have different configurations at one or more stereocenters,
and epimers specifically refer to diastereomers that differ in configuration at only one carbon.
For example, glucose and galactose are epimers because they differ in configuration at the C-4 carbon. In conclusion, epimers are a type of diastereomer that have a specific difference in configuration at one carbon.
epimers are a specific type of diastereomers that differ in configuration at only one chiral carbon.
Diastereomers are stereoisomers that are not mirror images of each other, and they can have multiple chiral centers. Epimers are a subset of diastereomers, where they have the same molecular formula and differ in the configuration of just one chiral carbon atom.
epimers are indeed diastereomers with a difference in configuration at a single chiral carbon, making them a unique category of stereoisomers.
To know more about stereoisomers, visit
https://brainly.com/question/31147524
#SPJ11
PLEASE HELP
Which Is a result of topsoil loss A increase soil fertility B poor crop production C soften soil surface D deposition of aggregate
Answers
Answer:
B - Poor crop production
Explanation:
I just did the quiz on Edge 2021
Answer:
b
Explanation:
Describe the difference between an endothermic reaction and an exothermic reaction.
Answers
Answer:
In simple terms, the endothermic reactions absorb energy from the surrounding that is in the form of heat. On the other hand, an exothermic reaction releases energy into the surrounding of the system.
(NEED HELP ASAP) Which statement is true about the particles of a solid when the solid changes into a liquid?
-They stop vibrating.
-Their kinetic energy increases.
-They move closer to each other.
-The attractive force between them increases.
Answers
When a solid changes into a liquid, the particles of the solid move farther apart and gain kinetic energy. Therefore, the statement that is true about the particles of a solid when the solid changes into a liquid is: their kinetic energy increases.
What is Kinetic Energy?
It is a scalar quantity and is dependent on the mass and velocity of an object. The formula for kinetic energy is:
Kinetic energy = (1/2) * mass * velocity^2
In a solid, the particles are tightly packed and vibrate in a fixed position. When the solid is heated or the pressure is reduced, the kinetic energy of the particles increases and they begin to vibrate faster and move slightly away from their fixed positions. This causes the solid to start melting and the particles begin to slide over each other, forming a liquid. Therefore, the particles of the solid move apart and gain kinetic energy when the solid changes into a liquid.
Learn more about Kinetic Energy from given link
https://brainly.com/question/25959744
#SPJ1
An advantage of using renewable energies is? 1.They are harmful to the environment 2.We have a limited supply of them 3.They allow us to take energy from natural processes
Answers
Answer:
3. They allow us to take energy from natural processes
Explanation:
There are two major sources of energy namely: renewable and non-renewable. Renewable sources of energy are those natural sources that gets replenished faster than they are utilized, which is contrary to non-renewable sources. Examples of renewable sources of energy are wind energy, solar energy, hydro (water) energy.
According to the question, one advantage or merit that renewable sources have over their counterparts is that they allow us to take energy from natural processes e.g. wind, sunlight etc.
If the unknown liquid in letter e has a volume of 5.0mL and a mass of 1.95g, what is its density? Make sure to show all work, use significant figures, and include the final unit. Will the sample float or sink in water?
Answers
Answer: Density is 0.39g/ml and will float
Explanation:
Density is mass/volume : 1.95g/5.0ml = 0.39g/ml
This sample will float on water because a object with a density less than 1g/cm3 will float. 1 cubic centimeter equal 1 ml.
how could you make a powdered drink mix have a stronger flavor or make it more concentrated
Answers
Answer:
Explanation:
To make it stronger you simply need to add more powdered drink mix or add less water. Concentration is basically the amount of something in something else. In this case, the more powdered mix is in the mixture per liter of water, the higher the concentration. Therefore, increasing the amount of powder mix while maintaining the same amount of water increases the concentration, as well as maintaining the same amount of powder mix but in less water. Anything else would decrease the concentration.
In a nuclear reaction, which of the following is not conserved? (a) Energy. (b) Momentum. (c) Electric charge. (d) Nucleon number. (e) None of the above.
Answers
In a nuclear reaction, all of the following quantities are conserved: energy, momentum, electric charge, and nucleon number. Therefore, the correct answer is Option E: None of the above.
Conservation laws play a fundamental role in understanding physical phenomena. In a nuclear reaction, such as radioactive decay or nuclear fusion/fission, various particles and energy are involved. The conservation of energy ensures that the total energy before and after the reaction remains constant. The conservation of momentum ensures that the total momentum in a system remains constant, accounting for both the linear and angular momentum.
Additionally, the conservation of electric charge guarantees that the total electric charge remains unchanged during a nuclear reaction. Finally, the conservation of nucleon number (total number of protons and neutrons) ensures that the total number of nucleons is constant throughout the reaction.
These conservation laws are crucial for understanding and describing the behavior of particles and energy in nuclear reactions.
Know more about Nuclear Reactions here:
https://brainly.com/question/13315150
#SPJ11
Begin walking at a brisk pace by pushing off of your heels onto your toes. After you feel warmed up (after 1 or 2 minutes), begin jogging at a slow pace (for 2 minutes). Next, run as fast as you can for 2 minutes. Slow down to a jog for 2 minutes. Slow down to a brisk walk for 2 minutes. Describes what? Question 1 options: Progressive walk Progressive Run Running Walking
Answers
Answer:
The answer is Progressive Run
Explanation:
I took the test and got it right <3
Brisk walking is the type of exercise that includes walking 3 miles in an hour at a faster speed than strolling. The situation describes the progressive run.
What is a progressive run?A progressive run is a type of aerobic and anaerobic exercise that benefits training and race management techniques.
The progressive run technique includes the easy and relaxing jog with a gradually increased running pace. This practice is used to overcome the second-half slow run issues.
Therefore, the situation depicts option B. progressive run.
Learn more about the progressive run here:
https://brainly.com/question/18294066
Assertion (A) : The acid must always be added to water with constant stirring.Reason (R) : Mixing of an acid with water decreases the concentration of H+ ions per unit volume. *
Answers
The acid must always be added to water with constant stirring because the process is highly exothermic and it can be dangerous. Therefore, the assertion is correct but the reason is incorrect.
1.Acid is thoroughly diluted with water before being added.
2.It should be introduced very gradually while being stirred continuously.
3.Acid addition to water is a highly exothermic reaction, releasing a lot of heat in the process.
4.The heat produced by the stirring is absorbed by the water, making the situation safer.
5.The amount of ions in a given volume are more concentrated when an acid and water are combined. However, it has nothing to do with continuously swirling acid into water.
Learn more about reaction of acid with water here:
https://brainly.com/question/16642753
#SPJ9
1. How many moles are in 24.6 grams of NaCl?
If someone could give an explanation along with an answer that would be appreciated :)
Answers
22.99g + 35.45g = 58.44g
Now to find out 24.6g of Sodium Chloride you will divide the number of grams in a problem by the molar mass.
24.6 / 58.44 = 0.421 mol of NaCl
Steel is formed by Group of answer choices oxidizing some of the iron to iron oxides. combining iron, carbon and transition metals such as chromium and nickel. heating iron at high temperature for a long time. adding sand and heating to a high temperature.
Answers
Answer:
combining iron, carbon and transition metals such as chromium and nickel.
Explanation:
Steels are alloys of iron and carbon. Steel is hard, tough and strong. The amount of carbon present in varies between 0.1 and 1.5% and it determines the hardness of steel. The higher the carbon content, the harder the steel produced. Also, the amount of heat treatment as well as presence of other elements determines the properties of steel produced.
Steel can be combined with other elements such as nickel, chromium, and manganese to produce various other alloys of steel . These alloys have various desirable properties than ordinary steel such as resistance to corrosion, high tensile strength and luster.
Which of the following is True about nitrogen -14 and nitrogen -16
A, They are completely different Atoms
B, they are the exact same atom
C, they are the same except that carbon -14 has 2 extra electrons
D, they are isotopes of the same atom
Answers
When you put the groceries away, you forgot to put the celery in the refrigerator. When you found it on the counter, it was soft and limp. How would osmosis help the celery? Explain what you would do and why it would work.
Answers
My celery can be become fresh again through the process of osmosis by submerging it in cold water.
The movement of water molecules from a region of high concentration of water molecules to a region with a lower concentration of water through a selective permeable membrane is called Osmosis.
Leaving my celery on the counter caused the the plant to loose water by the process of transpiration through its guard cells making the celery become soft and limp.
To restore the celery,
I will get a bowl of water (preferably cold water ) and put the celery in it for up to 30 mins or more.After a while, the plant will take in water into its cells by the action of osmosis ie ( movement of water from a region of high concentration of water molecules to a region with a lower concentration of water with the cell wall acting as a semi permeable membrane).This will bring back the turgidity of the cell wall of the plant causing the celery to be crisp and fresh again.See more on osmosis here: https://brainly.com/question/21395644