By titration, it is found that 95.3 mL of 0.194 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the concentration of the HCl solution.
Answers
The concentration of the HCl solution is 0.7484 M.
To calculate the concentration of the HCl solution, we can use the concept of stoichiometry.
According to the balanced chemical equation for the reaction between NaOH and HCl, one mole of NaOH reacts with one mole of HCl.
First, we need to determine the number of moles of NaOH used.
By multiplying the volume (95.3 mL) by the concentration (0.194 M)
We find that the moles of NaOH used are:
moles of NaOH = (0.194 M) * (0.0953 L)
= 0.01871 moles
Since the reaction is 1:1, the moles of HCl present in the 25.0 mL solution can be determined as:
moles of HCl = 0.01871 moles
Finally, we can calculate the concentration of the HCl solution by dividing the moles of HCl by the volume in liters:
concentration of HCl = (0.01871 moles) / (0.0250 L)
= 0.7484 M
Therefore, the concentration of the HCl solution is 0.7484 M.
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Related Questions
A balloon is filled to a volume of 2.00 L with 3.50 moles of gas at 25
°C. With pressure and temperature held constant, what will be the
volume of the balloon if 1.60 moles of gas are added?
Answers
ANSWER;
2.914 L
Explanation:
A balloon is filled to a volume of 2.00 L with 3.50 moles of gas at 25
°C. With pressure and temperature held constant, what will be the
volume of the balloon if 1.60 moles of gas are added?
WE HAVE INCREASED THE NUMBER OF PARTICLES THE BALLOON BY
45.7%
ALL OTHER THINGS EQUAL, WE HAVE INCREASED THE VOLUME BY
45.7%
THE NEW VOLUME SHOULD BE 2.00 X 1.457= 2.914 L
Use the References to access important values if needed for this question. Enter electrons as e-.
A voltaic cell is constructed from a standard Pb2+|Pb Half cell (E° red = -0.126V) and a standard F2|F- half cell (E° red = 2.870V). (Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.)
The anode reaction is:___________
The cathode reaction is:__________
The spontaneous cell reaction is:__________
The cell voltage is ___________V
Answers
We know the standard reduction potentials of the half-cells involved, so we can find the cell voltage and the spontaneous reaction. Thus;
The anode reaction is:
Pb(s) → Pb2+(aq) + 2e-
This is the oxidation half-reaction that occurs in the Pb half-cell.
The cathode reaction is:F2(g) + 2e- → 2F-(aq).
This is the reduction half-reaction that occurs in the F2 half-cell.
The spontaneous cell reaction is
:Pb(s) + F2(g) → Pb2+(aq) + 2F-(aq).
This is the combination of the oxidation and reduction half-reactions, with the electrons canceled out from both sides.
The cell voltage is 2.996 V The standard cell potential is calculated as follows:
standard cell potential = E°(reduction) - E°(oxidation)standard cell potential = 2.870 V - (-0.126 V)standard cell potential = 2.996 V, The cell voltage is positive, indicating that the reaction is spontaneous.
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Name 3 parts of an atom
Answers
Answer:
the three parts are protons, neutrons, and electrons
Explanation:
have a good day
a molecule in a chemical reaction that has its chemical bonds broken is called the _______ in the reaction?
Answers
Answer:
reactants
Explanation:
if 0.66 mole of a substance has a mass of 99 g, what is the molecular mass of the substance?
Answers
Molecular mass is expressed as follows: 99g / 0.66mole = 150g/mol, or 150amu 30.
the same thing as molecular mass?Moreover, the main difference between the two is that molar mass gives the mass of a mole of a certain substance. Molecular weight, on the other hand, refers to the mass of a substance's molecules. Although the definitions and measurement techniques for molar mass and molecular weight are dissimilar, their results are the same.
In grams, what is molar mass?The molar mass of a material is defined as its mass divided by its concentration, given in grams per mole (g/mol). For instance, titanium has an atomic mass of 47.88 amu, or 47.88 g/mol. One mole, or 6.022 x 1023 titanium atoms, make up 47.88 grams of titanium.
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Earth and Jupiter are shown next to each other. Earth is much smaller than Jupiter.
Why is Jupiter so much larger than Earth? Check all that apply.
Inner planets were created at higher velocities.
Outer planets have less gravity than inner ones.
Outer planets attracted helium, hydrogen, and other gasses.
Inner planets formed where temperatures were cooler.
Gases escaped from inner planets and not from outer ones.
Answers
Answer:
A, C, and E. I hope you have a good day.
Explanation:
Answer:
1, 3, and 5
Explanation:
An old refrigerator is rated at 500 W how many kilowatt hours of electric energy what does refrigerator use in 30 days assume the refrigerator is running 12 hours per day
Answers
The refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.
To calculate the kilowatt-hours (kWh) of electric energy used by the refrigerator in 30 days, we need to multiply the power rating by the total running time.
Given:
Power rating of the refrigerator = 500 W
Running time per day = 12 hours
Number of days = 30
First, we need to convert the power rating from watts to kilowatts:
Power rating = 500 W / 1000 = 0.5 kW
Next, we calculate the total energy used in kilowatt-hours (kWh) over the 30-day period:
Energy used = Power rating × Running time × Number of days
Energy used = 0.5 kW × 12 hours/day × 30 days
Energy used = 180 kWh
Therefore, the refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.
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What happens over time as sediments settle on land or water?
Answers
Deposition: Sediments can accumulate and settle on the bottom of a water body or on land, resulting in the formation of layers of sediment. This process can take thousands or even millions of years, and the resulting sedimentary layers can provide important information about the history of the area.
Compaction: As sediment accumulates, it can become compacted due to the weight of the layers above it. This can result in the compression of the sediment, causing it to become denser and harder over time.
Cementation: Sediments can also become cemented together over time, as minerals in the sediment dissolve and precipitate out, filling the spaces between the grains of sediment and binding them together. This process can result in the formation of sedimentary rocks.
Erosion: Sediments can be eroded away by the action of wind or water, or by human activities such as mining or construction. This can result in the loss of soil and changes to the landscape.
Overall, the process of sedimentation can have a significant impact on the environment over time, as sediments accumulate and are transformed into new forms.
how many different arrangements of atoms, not including resonance forms, are possible for o4
Answers
The word can include any letter of the alphabet (26 letters) and that repetition is allowed, then the number of possible arrangements of 100 letters is equal to \(26^100,\) which is a very large number (approximately\(1.43 x 10^143).\)
Assuming that by "wiord" you mean "word", there are different ways to interpret this question depending on the context.
If you are referring to the molecule O4, which is not a stable compound under standard conditions and is more commonly known as an ozone molecule, then there is only one arrangement of atoms that is possible. This is because the O4 molecule consists of four oxygen atoms that are chemically equivalent and can only form one unique structure.
If you are referring to a word made up of 100 letters, then the number of different arrangements of atoms is not applicable as atoms are not involved in the context of words.
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The word can include any letter of the alphabet (26 letters) and that repetition is allowed, then the number of possible arrangements of 100 letters is equal to 2600 which is a very large number .
If you are referring to the molecule O4, which is not a stable compound under standard conditions and is more commonly known as an ozone molecule, then there is only one arrangement of atoms that is possible. This is because the O4 molecule consists of four oxygen atoms that are chemically equivalent and can only form one unique structure.
If you are referring to a word made up of 100 letters, then the number of different arrangements of atoms is not applicable as atoms are not involved in the context of words.
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PLEASE HELP ILL GIVE U MY ARM While performing calorimetry a hot Cheeto was burned in a bomb calorimeter
and increased the temperature of the water. Which of the statements is the most
correct?
Answers
Answer:
I drew an amazing picture explaining everything....
Explanation:
Hope this helps! Please let me know if you need more help, or if you think my answer is incorrect. Brainliest would be MUCH appreciated. Have a great day!
−xXheyoXx
How many grams of calcium hydroxide will be formed in this reaction when 4.44 g of calcium oxide and 7.77 g of water are available to react? also identify the limiting an excess reactants. how much excess reactant is left over in grams?
Answers
Answer:
please provide more información or a photo
Explanation:
Of you want me to hwlp you please have more infor like a picture
Can anyone pls answerrrrt
Answers
Answer:
wdym
Explanation:
hmm
an unknown containing one or more of the ions studied in this experiment has the following properties
Answers
The unknown solution contains chloride ions and possibly molybdenum ions.
a. No effect on addition of 6 M HNO3: This suggests that the ions present in the solution are not acidic and do not react with strong nitric acid.
b. No effect on addition of 0.1 M AgNO3 to solution in Part A: This suggests that the ions present in the solution are not chloride ions, as AgCl is a white precipitate.
c. White precipitate on addition of 1 M BaCl2 to solution in Part A: This suggests that chloride ions are present in the solution.
d. Yellow precipitate on addition of (NH4)2MoO4, to solution in Part A: This suggests that ions with a molybdenum oxidation state are present in the solution.
Based on this information, it can be concluded that the unknown solution contains chloride ions and possibly molybdenum ions. The absence of other ions cannot be definitively concluded from this information alone.
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Complete question:
An unknown containing one or more of the ions studied in this experiment has the following properties:
a. No effect on addition of 6 M HNO3.
b. No effect on addition of 0.1 M AgNO3 to solution in Part A.
c. White precipitate on addition of 1 M BaCl2 to solution in Part A.
d. Yellow precipitate on addion of (NH4)2MoO4, to solution in Part A.
Thompson changed out the
metal and still consistently
observed the same cathode ray.
What did this observation mean
for atomic theory?
A. The atomic is a small hard sphere.
B. The atom is indivisible.
C. The atom contained something small and
negative.
D. The atom is mostly empty space.
Answers
Thompson's model concluded that the atom contained something small and negative. The correct option to this question is C.
What is Thompson's model?Thomson's description of the atomic model is one of many scientific models of the atom. Created by J.J. Thomson in 1904, shortly after the electron was discovered. However, the atomic nucleus had not yet been discovered at that time. So he proposed a model based on the known properties available at the time. Known properties are:
Atoms are neutrally charged
Inside an atom are negatively charged particles called electrons. According to the assumptions of Thomson's atomic model, an atom resembles a positively charged sphere with electrons (negatively charged particles) inside.
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kat is investigating a compound and sees that it has even stronger hydrogen bonds than water. what can kat conclude is most likely true about the specific heat of this compound? it is higher than the specific heat of water. it is equal to the specific heat of water. it is slightly lower than the specific heat of water. it is half as much as the specific heat of water.
Answers
Based on the information provided, if the compound has stronger hydrogen bonds than water, it suggests that the compound has a higher specific heat than water. The correct option is A.
Specific heat is a measure of how much heat energy is required to raise the temperature of a substance.
Water has a high specific heat due to its extensive hydrogen bonding, which allows it to absorb and release heat energy effectively.
If the compound being investigated has even stronger hydrogen bonds than water, it implies that it can absorb more heat energy before its temperature increases significantly.
Therefore, it can be concluded that the specific heat of this compound is higher than the specific heat of water, as it can absorb and store more heat energy per unit mass, making it more resistant to temperature changes. The correct option is A.
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Give the correct name for the structure in the image.
Answers
Answer:
2,5,6-trimethyloctane
Explanation:
1) Count the number of carbons in the longest chain. If the structure contains a functional group (e.g. double bond, -OH), they have to be part of the chain that you're counting.
• The straight chain is the longest chain, and it contains 8 carbons
• Without the additional 3 methyl (-CH₃) substituents, it would be called octane (since it is an alkane)
2) Assign location numbers for the substituents, ensuring that they are the lowest possible numbers
• From left to right, we could name it as 2,5,6-trimethyloctane
• From right to left of the parent chain, it would be called 3,4,7-trimethyloctane
• Assigning from left to right gives us the lowest location numbers as the sum of the numbers is 13 instead of 14
• Remember to add 'tri' since we have 3 methyl groups
Question 14 PM2.5 is defined as ________
- the mass concentration of particles in the air less than or equal to 2.5 micrometers in diameter. - the mass concentration of particles in the air equal to 2.5 micrometers in diameter. - the mass concentration of particles in the air greater than or equal to 2.5 micrometers in diameter. Question 15 Carbon dioxide (CO2) is a criteria air pollutant. - True - False Question 16 Roughly percent of emissions of carbon monoxide in Santa Clara County come from mobile sources (select the choice closest to the correct answer). - 50 - 75 - 25 Question 17
The term "photochemical smog" is most synonymous with which of the following criteria air pollutants? - lead (Pb) - carbon monoxide (CO) - sulfur dioxide ( SO2) - ozone (O3) Question 18 "Attainment" of ambient air quality standards requires that measured concentrations at all monitoring stations within an air district are below ambient air standards. - True - False
Answers
: PM2.5 is defined as the mass concentration of particles in the air less than or equal to 2.5 micrometers in diameter.Question 15: False, carbon dioxide (CO2) is not considered a criteria air pollutant.
Question 16: The closest answer is 50%, but the exact percentage is not provided in the question.Question 17: The term "photochemical smog" is most synonymous with ozone (O3), which is a criteria air pollutant.Question 18: True, attainment of ambient air quality standards requires that measured concentrations at all monitoring stations within an air district are below ambient air standards.
Question 14 asks about the definition of PM2.5. PM2.5 refers to particulate matter with a diameter less than or equal to 2.5 micrometers. It represents the mass concentration of particles suspended in the air, which are small enough to be inhaled into the respiratory system and can have adverse health effects.
Question 15 states whether carbon dioxide (CO2) is a criteria air pollutant. Criteria air pollutants are a set of pollutants regulated by environmental agencies due to their detrimental impact on air quality and human health. However, carbon dioxide is not considered a criteria air pollutant because it does not directly cause harm to human health or the environment in the same way as pollutants like ozone or particulate matter.
Question 16 asks about the percentage of carbon monoxide (CO) emissions from mobile sources in Santa Clara County. While the exact percentage is not provided in the question, the closest answer option is 50%. However, it is important to note that the precise percentage may vary depending on specific local conditions and emissions sources.
Question 17 inquires about the criteria air pollutant most synonymous with the term "photochemical smog." Photochemical smog is primarily associated with high levels of ground-level ozone (O3). Ozone is formed when nitrogen oxides (NOx) and volatile organic compounds (VOCs) react in the presence of sunlight, creating a hazy and polluted atmospheric condition.
Question 18 addresses the concept of "attainment" of ambient air quality standards. To achieve attainment, measured concentrations of pollutants at all monitoring stations within an air district must be below the established ambient air quality standards. This ensures that the air quality in the given area meets the required standards for protecting human health and the environment.
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draw structural formulas for an aldehyde or ketone and alkyl (or aryl) bromide that could be used in a grignard synthesis of the alcohol shown.ch2ch2oh
Answers
Grignard synthesis of the alcohol shown involves the following reaction: CH2CH2Br + Mg + 2(C2H5)2O → CH2CH2MgBr + 2C2H5OHWhen we compare the equation with the reagents available, we can see that it requires CH2CH2Br and two molecules of C2H5OH.
From these, CH2CH2OH is synthesized. As the equation suggests that CH2CH2Br is the alkyl halide used, we can add CH2CH2Br and an aldehyde or ketone as a reactant. To draw the structural formulas for the reaction, follow the below guidelines: Step 1: Add an aldehyde or ketone Aldehydes and ketones are organic compounds containing carbonyl groups. They have the following formula: RCHO (aldehyde) and R2CO (ketone), respectively. An example of an aldehyde is formaldehyde, which has a structural formula HCHO. When we add HCHO to the reaction, the structural formula for the reactant becomes: CH2O.Step 2: Add an alkyl or aryl bromide The next step is to add an alkyl or aryl bromide to the reactant. An alkyl bromide is an organic compound containing a carbon-bromine bond, while an aryl bromide contains a bromine atom attached to an aromatic ring. The simplest example of an alkyl bromide is CH3Br, while the simplest aryl bromide is bromobenzene (C6H5Br). For this reaction, we will add CH2CH2Br as the alkyl bromide. The structural formula for the reactant becomes: CH2CH2Br + CH2OHere is the required structural formula in 100 words. The Grignard synthesis of the alcohol shown in the equation CH2CH2Br + Mg + 2(C2H5)2O → CH2CH2MgBr + 2C2H5OH requires CH2CH2Br and two molecules of C2H5OH. Therefore, we can add CH2CH2Br and an aldehyde or ketone to form the desired alcohol. For this purpose, we will use HCHO as an aldehyde and CH2CH2Br as an alkyl bromide. The structural formula for the reactant will be CH2CH2Br + CH2O.
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The mass of a hydrogen atom (11H) is 1.007825 amu; that of a tritium atom (31H) is 3.01605 amu; and that of an α particle is 4.00150 amu. How much energy in kilojoules per mole of 42He produced is released by the following fusion reaction:
a.3.34x10-10J b.3.34x10-13J c.2.01x1016J d.6.71x10-21
Answers
The correct answer is option c. The energy released in fusion reaction, producing 42He, is 2.01x10^16 J. Energy released in fusion reaction: Energy released during the combining of atomic nuclei.
To determine the energy released in fusion reaction, we need to calculate the mass defect, which is the difference in mass between the reactants and the products. The mass defect can be calculated by subtracting the sum of the masses of the individual particles from the mass of the helium nucleus.
The mass defect for this reaction is calculated as follows:
Mass defect = (Mass of reactants) - (Mass of 42He)
Mass defect = (1.007825 amu + 3.01605 amu) - 4.00150 amu
Mass defect = 0.023475 amu
Next, we use Einstein's mass-energy equivalence equation (E = mc^2) to convert the mass defect to energy. Since the question asks for the energy in kilojoules per mole, we need to convert the mass defect to kilograms per mole:
Mass defect in kilograms per mole = (0.023475 amu/mol) × (1.66054 × 10^-27 kg/amu) = 3.89946 × 10^-29 kg/mol
Finally, we calculate the energy released using the equation:
Energy released = (Mass defect in kilograms per mole) × (Speed of light)^2
Energy released = (3.89946 × 10^-29 kg/mol) × (2.998 × 10^8 m/s)^2 = 2.01 × 10^16 J/mol
Thus, the energy released by the fusion reaction, producing 42He, is 2.01 × 10^16 J/mol.
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Calculate the mass of sodium tetraoxosulphate (vi) formed when 0.5 mole of sodium hydroxide react with tetraoxosulphate (vi) acid. (Na=23, O=16, S=32, H=1
Answers
35.5 grammes of sodium tetraoxosulphate (VI) were produced.
Are 0.5 M NaOH solution and 0.5 M NaOH the same thing?Solution: 0.5 m of NaOH denotes the amount of the solvent that is dissolved in 0.5 mole (20.0 g) of NaOH. 0.5 moles of NaOH (20.0 g) are dissolved in 1000 millilitres of the solution, or 0.5 M of NaOH.
Tetraoxosulphate VI acid is created in what way?Tetraoxosulphate VI acid is produced commercially using the Contact process. The Contact procedure entails the following steps. In order to purge the sulphur (IV) oxide generated of contaminants and dust that can poison the catalyst, it is combined with extra air and sent through an electric chamber.
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A radioactive sample has activity 4.20kBq and half-life 32 minutes. Measurements are taken every 5 minutes for one hour. Plot a graph of the activity against time for this sample.
Answers
Plotting the graph of activity against time for a radioactive sample with an initial activity of 4.20 kBq and a half-life of 32 minutes, with measurements taken every 5 minutes for one hour, shows a decreasing exponential curve.
The activity of a radioactive sample decreases exponentially over time according to the formula A(t) = A0 * (1/2)^(t / T), where A(t) is the activity at time t, A0 is the initial activity, t is the time elapsed, and T is the half-life.
In this case, the initial activity A0 is 4.20 kBq and the half-life T is 32 minutes. Measurements are taken every 5 minutes for one hour, which corresponds to 12 measurements in total.
To plot the graph, we calculate the activity at each time point using the given formula and plot the points on a graph. The x-axis represents the time in minutes, and the y-axis represents the activity in kBq.
Starting with t = 0 minutes, the activity is 4.20 kBq. For each subsequent measurement at intervals of 5 minutes, we calculate the activity using the formula. The resulting data points can be plotted on a graph, connecting them with a decreasing exponential curve.
Note: Since the prompt doesn't specify the unit for time, we assume minutes for consistency with the half-life given in minutes.
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what needs to occur in order for elements to form a compound?
Answers
Answer:
When two distinct elements are chemically combined.
Explanation:
Chemical bonds form between their atoms the result is called a chemical compound. Most elements on Earth bond with other elements to form chemical compounds, such as sodium (Na) and Chloride (Cl), which combine to form table salt (NaCl)
A nonpolar solvent has the highest solubility with a(n) _____ solute. A. polar B. nonpolar C. ionic D. electrically charged solute.
Answers
Answer:
nonpolar
Explanation:
A nonpolar solvent has the highest solubility with a nonpolar solute.
why is oxygen more electronegative than hydrogen
Answers
Answer:
The attraction of the Oxygen for an electron as measured by the electronegativity of Oxygen is 3.5 which is higher than the electronegativity of Hydrogen at 2.2
Explanation:
The two products that are formed when a solution of HNO3 and a solution of NaOH react are water and:
NaNO2.
NaNO3.
NaHNO.
NaHNO3.
Answers
Answer: NaNO3 (Sodium Trioxonitrate (V) )
Explanation:
The equation of the reaction is; HNO3 + NaOH -----> H2O + NaNO3
Answer: its B
Explanation:
which statement regarding the chemical grooming of pyruvate is false? which statement regarding the chemical grooming of pyruvate is false? each pyruvate molecule has a co2 added and then joins with an nadh
Answers
The statement that is false regarding the chemical grooming of pyruvate is "each pyruvate molecule has a CO2 added and then joins with an NADH.
Pyruvate is the end product of glycolysis that further undergoes chemical grooming in the presence of oxygen to produce ATP. The complete oxidation of glucose produces a total of 36-38 ATPs per molecule.
Pyruvate is oxidized to produce Acetyl-CoA. During this process, the carboxyl group of pyruvate is removed and given off as CO2. This is known as decarboxylation.
The remaining 2-carbon molecule is then oxidized by the removal of electrons by the NAD+ which is reduced to NADH. This is called oxidative decarboxylation, and its purpose is to prepare the substrate for energy production.
The correct statement regarding the chemical grooming of pyruvate is, "Each pyruvate molecule loses a CO2 molecule and then joins with a coenzyme A to form acetyl-CoA, producing an NADH molecule."
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Which choice is not true of a liquid in a glass capillary with a convex meniscus?a. The liquid has strong cohesive forces.b. The liquid level will be lower inside the capillary when a capillary is inserted into a bowl of the liquid.c. The liquid will have a convex meniscus as it moves in the capillary.d. The behavior of the liquid is driven by strong interactions with the capillary glass.
Answers
The correct answer is the liquid level will be lower inside the capillary when a capillary is inserted into a bowl of the liquid.
When a liquid is placed in a glass capillary with a convex meniscus, the behavior of the liquid is driven by strong cohesive forces between the liquid molecules and strong interactions with the capillary glass. As a result, the liquid will have a convex meniscus, meaning that the surface of the liquid will be curved outward. This is due to the forces acting on the liquid in the capillary. However, when a capillary is inserted into a bowl of the liquid, the liquid level inside the capillary will be higher than the liquid level outside the capillary. This is because the cohesive forces between the liquid molecules are stronger inside the capillary, where the liquid is in contact with the walls of the capillary, than they are outside the capillary. As a result, the liquid will be pulled up the walls of the capillary, causing the liquid level inside the capillary to be higher than the liquid level outside the capillary. This is opposite to what is stated in choice b, which is why it is the correct answer.
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Plastic is used to cover the copper wire in the power codes of appliances because plastic differs from copper in _________
Answers
Answer:
in copper from different plastics because appliances of codes to power day in wire copper the cover to use to plastic
11. In the boxes below make Bohr models for each of the elements.
a. Determine how many electrons, protons, and neutrons there are in each atom.
b. Draw a Bohr model of each element using the number of electrons, protons, and neutrons
Electrons.
Protons
Neutrons
HELIUM
Electrons
Protons
Neutrons
OXYGEN
Answers
The atomic number represents the number of protons, whereas the mass number represents the quantity of protons and neutrons. The number of protons equals the amount of electrons.
In a Bohr diagram, where do you determine the number of neutrons?The atomic number is the number of protons. The number of neutrons may be calculated by subtracting the number of protons from the atomic mass, which is then rounded to the closest whole number.
For neutrally charged species, the number of electrons in an atom equals the atomic number of an element. This signifies that the number of electrons and protons in an element are equal. As a result, the number of electrons in oxygen is eight.
The number of valence electrons in neutral atoms equals the atom's main group number. A periodic table column can be used to determine an element's main group number. Carbon, for example, belongs to group 4 and contains four valence electrons.
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which of the following are arrhenius bases? a. h3aso4 b. ba(oh)2 c. hclo d. koh
Answers
The Arrhenius bases among the given options are Ba(OH)2 and KOH. Arrhenius bases are substances that, when dissolved in water, release hydroxide ions (OH-) as the predominant species. Among the given options:
a. H3AsO4: This is not an Arrhenius base. It is a polyprotic acid, known as arsenic acid, and releases protons (H+) when dissolved in water, making it an acid.
b. Ba(OH)2: This is an Arrhenius base. When Ba(OH)2 is dissolved in water, it dissociates into Ba2+ ions and hydroxide ions (OH-). The hydroxide ions make it a base.
c. HClO: This is not an Arrhenius base. It is a weak acid, known as hypochlorous acid, and releases protons (H+) when dissolved in water.
d. KOH: This is an Arrhenius base. When KOH is dissolved in water, it dissociates into K+ ions and hydroxide ions (OH-). The presence of hydroxide ions makes it a base.
Therefore, the Arrhenius bases among the given options are Ba(OH)2 and KOH.
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