Nitrogen has five electrons in its valence shell. An atom of nitrogen contains seven electrons, and it is located in group 15 of the periodic table. The valence shell of nitrogen is the outermost shell that contains the electrons that are involved in chemical bonding.
The valence electrons are the electrons in the outermost shell of an atom. They are the electrons that are involved in chemical bonding. These electrons participate in forming covalent bonds with other atoms. When nitrogen forms a covalent bond, it shares one of its valence electrons with another atom.
Nitrogen has a valence electron configuration of 2s²2p³. This means that it has two electrons in the 2s subshell and three electrons in the 2p subshell. The valence electrons are the three electrons in the 2p subshell. Nitrogen can form up to three covalent bonds with other atoms because it has three valence electrons.
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a tomato plant cell has 24 chromosomes how many chromosomes will each daughter cell have after the cell undergoes a mitotic division
Answer: 12
Explanation:
How is an empirical formula calculation related to a percent composition calculation?
Take the percentages divide them by the atomic relative mass of the atoms. After dividing you will get the values. Divide all the values with the smallest value which you get and by doing this you will get a ratio and this will be the empirical formula.
What is meant by smallest value?The smallest value in a list of numbers is referred to as the minimum (the greatest value is called the maximum).
The lowest point on a vertex is the minimal value of a function. Your quadratic equation will have a minimal value if it contains a positive term.
By graphing the function or by applying one of the two equations, you can determine this minimum value.
The lowest point on a vertex is the minimal value of a function. Your quadratic equation will have a minimal value if it contains a positive term.
By graphing the function or by using one of the two equations, you can determine this minimum value.
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Carbon-14 is radioactive, and has a half-life of 5,730 years. It’s used for dating archaeological artifacts. Suppose one starts with 264 carbon-14 atoms. After 5,730 years, how many of these atoms will still be carbon-14 atoms? Write this number in standard scientific notation here. (Hint: remember that 264/2 isn’t 232, it’s 263.)
Mt. McKinley in Alaska has an altitude of 20,320 ft. Water (AH/ap
40.7 kJ/mol) boils in 77°C atop Mt. McKinley. What is the normal atmospheric pressure at the summit?
1156 ± 474
Explanation:
Which is not a form of potential energy?
gravitational
chemical
elastic
thermal
Answer:Thermal Energy is not a form of potential energy
Explanation:
\(\red{➤}\:\)\(\sf ({\frac{3}{2}})^{-1}÷ ({\frac{-2}{5}})^{-1}\)
\(\\\)
Solution:-Since the power is in negetive,we write the reciprocal of the number and then solve it like positive exponents-
\(\begin{gathered}\\\quad\longrightarrow\quad\sf( {\dfrac{3}{2}})^{-1}÷ ({\frac{-2}{5}})^{-1}\\\end{gathered} \)
\(\begin{gathered}\\\quad\longrightarrow\quad\sf ({\dfrac{2}{3}})^{1}÷ ({\dfrac{5}{-2}})^{1}\quad (a^1=a)\\\end{gathered} \)
\(\begin{gathered}\\\quad\longrightarrow\quad\sf \dfrac{2}{3}÷ \dfrac{5}{(-2)}\\\end{gathered} \)
\(\begin{gathered}\\\quad\longrightarrow\quad\sf \dfrac{2}{3}×\dfrac{(-2)}{5}\\\end{gathered} \)
\(\begin{gathered}\\\quad\longrightarrow\quad\sf \dfrac{2×(-2)}{3×5}\\\end{gathered} \)
\(\begin{gathered}\\\quad\longrightarrow\quad\boxed{\sf{ \dfrac{-4}{15}}}\\\end{gathered} \)
Know More-Laws of Exponents-
\( \sf a^m×a^n = a^{m+n} \\
\sf a^m/a^n = a^{m-n} \\
\sf{(a^m)}^n = a^{mn} \\
\sf a^n/b^n = (a/b)^n \\
\sf a^0 = 1 \\
\sf a^{-m }= 1/a^m
\)
A solution of benzene is prepared by dissolving 0.32 mg of benzene to volume of 100 dm3 calculat molarity
Answer:
4.10 x 10⁻⁸ M
Explanation:
The molarity (M) of a solution is defined as the number of moles of solute per liter of solution. We have to first calculate the number of moles of solute (benzene) from the mass and the molecular weight:
Benzene has the chemical formula C₆H₆. So, its molecular weight (MW) is calculated from the molar mass of C (12 g/mol) and H (1 g/mol):
MW(C₆H₆)= (12 g/mol x 6 C) + (1 g/mol x 6 H) = 78 g/mol
Then we convert the mass of benzene (0.32 mg) from mg to grams and divide the mass into the MW:
mass = 0.32 mg x 1 g/1000 mg = 3.2 x 10⁻⁴ g
moles of benzene = mass/MW = 3.2 x 10⁻⁴ g/(78 g/mol) = 4.10 x 10⁻⁶ mol
Now, we convert the volume of solution from dm³ to L:
liters of solution = 100 dm³ x 1 L/1 dm³ = 100 L
Finally, we divide the moles of benzene into the volume of solution in liters:
M = moles of benzene/liters of solution = 4.10 x 10⁻⁶ mol/100 L = 4.10 x 10⁻⁸ mol/L = 4.10 x 10⁻⁸ M
plants get energy from the
Answer:
Plants need energy from the sun, water from the soil, and carbon from the air to grow. Air is mostly made of nitrogen, oxygen, and carbon dioxide. So how do plants get the carbon they need to grow? They absorb carbon dioxide from the air.
please make most brainlyest
An aspirator uses the laminar flow of water through a tube to pull air outside the tube into the tube. Use Bemoulli's principle to explain how an aspirator works.
Answer:
as water moves into a more narrow space and accelerates causing air to speed up with the tube.
hope this helps ;)
7. How does Doppler radar help to predict tornadoes earlier
Answer:
It can help in predicting when a storm is being formed in a nearby area.
The half-life of Radon-222 is 3.8 days. If a 10 gram sample is present, how many days will it take to have less than one gram remaining?
(alt + F4) might be the answer you are looking
Explanation:
I'm not exactly sure how I came up with this answer but it is for sure the answer
According to the definition of enthalpy, H= E+PVE + PV According to the definition of enthalpy, H =blank, so \Delta H =blank. For an ideal gas at constant temperature and volume, \Delta (PV) = V \Delta P =blank. For this reaction, \Delta n is blank. Thus V \Delta P or \Delta (PV) is blank. Because \Delta H =blank, the blank\Delta (PV) term means that \Delta E is larger than \Delta H. , so ΔH= According to the definition of enthalpy, H =blank, so \Delta H =blank. For an ideal gas at constant temperature and volume, \Delta (PV) = V \Delta P =blank. For this reaction, \Delta n is blank. Thus V \Delta P or \Delta (PV) is blank. Because \Delta H =blank, the blank\Delta (PV) term means that \Delta E is larger than \Delta H. For an ideal gas at constant temperature and volume, Δ(PV)=VΔP= According to the definition of enthalpy, H =blank, so \Delta H =blank. For an ideal gas at constant temperature and volume, \Delta (PV) = V \Delta P =blank. For this reaction, \Delta n is blank. Thus V \Delta P or \Delta (PV) is blank. Because \Delta H =blank, the blank\Delta (PV) term means that \Delta E is larger than \Delta H. For this reaction, Δn is According to the definition of enthalpy, H =blank, so \Delta H =blank. For an ideal gas at constant temperature and volume, \Delta (PV) = V \Delta P =blank. For this reaction, \Delta n is blank. Thus V \Delta P or \Delta (PV) is blank. Because \Delta H =blank, the blank\Delta (PV) term means that \Delta E is larger than \Delta H. Thus VΔP or Δ(PV) is According to the definition of enthalpy, H =blank, so \Delta H =blank. For an ideal gas at constant temperature and volume, \Delta (PV) = V \Delta P =blank. For this reaction, \Delta n is blank. Thus V \Delta P or \Delta (PV) is blank. Because \Delta H =blank, the blank\Delta (PV) term means that \Delta E is larger than \Delta H. Because ΔH= According to the definition of enthalpy, H =blank, so \Delta H =blank. For an ideal gas at constant temperature and volume, \Delta (PV) = V \Delta P =blank. For this reaction, \Delta n is blank. Thus V \Delta P or \Delta (PV) is blank. Because \Delta H =blank, the blank\Delta (PV) term means that \Delta E is larger than \Delta H. , the According to the definition of enthalpy, H =blank, so \Delta H =blank. For an ideal gas at constant temperature and volume, \Delta (PV) = V \Delta P =blank. For this reaction, \Delta n is blank. Thus V \Delta P or \Delta (PV) is blank. Because \Delta H =blank, the blank\Delta (PV) term means that \Delta E is larger than \Delta H. Δ(PV) term means that ΔE is larger than ΔH
The term Δ(PV) being blank suggests that there is no change in pressure or volume in the reaction because ΔH = 0 and Δ(PV) = 0, it indicates that the change.
According to the definition of enthalpy, H = E + PV, where E represents the internal energy of the system, P is the pressure, and V is the volume. Therefore, ΔH represents the change in enthalpy.
For an ideal gas at constant temperature and volume, Δ(PV) = VΔP, as the change in pressure (ΔP) is directly proportional to the change in volume (V).
The symbol Δn represents the change in the number of moles of gas involved in the reaction.
Thus, VΔP or Δ(PV) is related to the change in pressure and volume of the gas in the reaction.
If ΔH = 0, it means that there is no change in enthalpy.
The term Δ(PV) being blank suggests that there is no change in pressure or volume in the reaction.
Therefore, because ΔH = 0 and Δ(PV) = 0, it indicates that the change.
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what is the ph of a buffer solution that is 0.28 m and 0.28 m ? for is . ph = 9.255272505 b. what is the ph if 23 ml of 0.19 m hydrochloric acid is added to 595 ml of this buffer?
the ph of a buffer solution that is 0.28 m and 0.28 m is 9.255. and the ph if 23 ml of 0.19 m hydrochloric acid is added to 595 ml of this buffer is roughly 9.135.
The Henderson-Hasselbalch equation, which links the pH of a buffer solution to the pKa of the weak acid in the buffer solution and the ratio of the concentrations of the weak acid and its conjugate base, must be used to find the answer to this query.
pH = pKa + log([base]/[acid]).
where [base] is the concentration of the conjugate base, [acid] is the concentration of the weak acid, and [pKa] is the weak acid's dissociation constant.
Given that the weak acid and its conjugate base are present in equal amounts in the buffer solution in this instance, [base] = [acid] = 0.28 M. We also know that the buffer has a pH of 9.255. We may rewrite the equation as: to find the pKa.
pKa Log ([base]/[acid]) of pH
9.255 - log(0.28/0.28)pKa
pKa = 9.255
Hence, the buffer's weak acid has a pKa of 9.255.
We must now figure out the new concentrations of the weak acid and its conjugate base in the buffer in order to compute the pH after adding 23 mL of 0.19 M hydrochloric acid to 595 mL of the buffer.
We must first determine how many moles of HCl were added:
concentration times volume equals 0.00437 moles of HCl, or 0.19 M times 0.023 L.
We can suppose that the buffer contains 0.28 moles of each weak acid and its corresponding base at the beginning because their concentrations are equal. The weak acid will have the following concentration once the HCl has been added:
Acid is equal to (0.28 moles - 0.00437 moles) / (0.595). L + 0.023 L) = 0.458 M
The conjugate base's concentration will be:
[base] = (0.335 M + 0.28 M + 0.00437 M) / (0.595 L + 0.023 L)
The Henderson-Hasselbalch equation can now be used to determine the new pH:
pH = 9.255 - log(0.335/0.458)
pH = 9.255 - 0.12
pH = 9.135
As a result, after adding 23 mL of 0.19 M hydrochloric acid, the buffer solution's pH is roughly 9.135.
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The picture is a waning gibbous. What phase will the moon be two weeks later?
A. 1st Quarter
B. 3rd Quarter
C. Waxing Crescent
D. New Moon
Answer:
d
Explanation:
Answer:
D
Explanation:
Because it is l o l
11. A solution is made that is 3.7 m. If 211.0 grams of water were used, how many moles of
the solute were used?
The 7 moles of solute were used for a solution is made that is 3.7 m.
What is moles ?
Chemists use the mole as a key unit of measurement. In the same way that having a dozen eggs means you have twelve eggs, having a mole of anything means you have 602,214,076,000,000,000,000,000 of that specific object. Mole units are used by chemists to quantify extremely small substances, such as atoms, molecules, or other particles.
What is solution ?
A solution is a homogeneous mixture of two or more substances in their relative amounts in chemistry. A solution can be continuously changed up to what is known as the limit of solubility. Despite the fact that the term "solution" is commonly used to describe the liquid state of matter, solutions of gases and solids are also possible.
Therefore, 7 moles of solute were used for a solution is made that is 3.7 m.
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Complete the balanced chemical equation for the following reaction between a weak acid and a strong base. H 2S(aq)+KOH(aq)→
The balanced chemical equation for the reaction between a weak acid (H2S) and a strong base (KOH) can be represented as follows:
H2S(aq) + 2KOH(aq) → K2S(aq) + 2H2O(l)
The balanced chemical equation for the reaction between a weak acid (H2S) and a strong base (KOH) can be represented as follows:
H2S(aq) + 2KOH(aq) → K2S(aq) + 2H2O(l)
In this reaction, the weak acid H2S reacts with the strong base KOH to form the salt K2S and water. The equation is balanced with two moles of KOH and two moles of water produced for every mole of H2S reacted. The coefficients in the balanced equation indicate the stoichiometric ratio of the reactants and products.
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Explain which has a greater impact on the kinetic energy of an object - the
object's mass or the object's speed?
Answer:
it is the objects mass, I learned this last semester
The object's mass has a greater impact on the kinetic energy of an object as it is the mass the mass on which force is exerted and in which energy is stored to be transformed in to kinetic energy.
What is force?Force is defined as a cause which is capable of changing the motion of an object. It can cause an object which has mass to change it's velocity. It is also simply a push or a pull . It has both magnitude as well as direction.Hence, it is a vector quantity.
It has SI units of Newton and is represented by'F'.Newton's second law states that force which acts on an object is equal to momentum which changes with time. If mass of object is constant, acceleration is directly proportional to net force acting on an object.
The concepts which related to force are thrust and torque .Thrust increases the velocity of an object and torque produces change in rotational speed of an object.
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Hydrogen atoms are excited by a laser to the =4 state and then allowed to emit.
What is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? Calculate the wavelength of the 4⟶3 transition.
Answer:
1875 nm
Explanation:
Given the Rydberg formula for hydrogen: 1/λ = R(1/n₁² - 1/n₂²)
where R ≈ 1.097* 10^7 /m
Hence;
1/λ = 1.097* 107/m * (1/3² - 1/4²) = 5.3 * 10^5/m
λ = 1.875 * 10-6 m = 1875 nm
Determine mass contribution for the following isotopes of the same element.
At the end, tell me the atomic mass of the element using the mass contributions.
Do not forget your units or the question will be marked incorrect.
Isotope 2 amu: 186.956
percent abundance: 62.6%
Atomic Mass of the element ?
Answer: Not possible to find average amu with only the information provided.
Explanation:
Is there more information about the other isotopes? I don't see how one could calculate an overall atomic mass with only one isotope is known. An isotope of 186.956 with abundance of 62.6% isn't enough information. We're not told anything about the other isotopes: are they larger, smaller, and at what percentage. If one has an amu of 204.956 at 37.4%, the overall atomic mass would be quite different than if it had an atomic mass of 182.956 at 37.4%. More infornmation is required.
Potassium nitrate is a component of black powder and a fertilizer. Its chemical formula is KNO3. Potassium nitrate is obtained by neutralizing which acid and alkali?
Answer:
Synthesis of Potassium Nitrate (KNO3)
When potassium hydroxide neutralizes nitric acid potassium nitrate is formed.
Answer:
Below.
Explanation:
Nitric acid and potassium hydroxide:
HNO3 + KOH ---> KNO3 + H2O.
1/ Hydra, a type of cnidarian, have equal survival rates through life because they are equally fit at all stages. Hydra are an example of an organism with a type ______ survivorship curve. Select one: a. 0 b. I c. II d. III e. IV 2/ What is different about how energy moves through an ecosystem compared to how chemicals move through the ecosystem? 3/ Tropical rain forest soils are usually Select one: a. nutrient-rich. b. low in organic matter. c. nutrient-poor and low in organic matter. d. nutrient-rich and low in organic matter. e. nutrient-poor.
Hydra, a type of cnidarian, have equal survival rates through life because they are equally fit at all stages. Hydra are an example of an organism with a type I survivorship curve. Thus, the correct option is b. II.
Differences between how energy moves through an ecosystem compared to how chemicals move through the ecosystem. The fundamental difference between how energy moves through an ecosystem compared to how chemicals move through the ecosystem is that energy can not be recycled. Energy is obtained from the sun and is stored in organic molecules, and it flows through an ecosystem through metabolic processes. However, the number of chemicals like carbon, oxygen, nitrogen, water, and phosphorus remains constant in an ecosystem.
Tropical rainforest soils are usually nutrient-poor and low in organic matter. Therefore, option c. nutrient-poor and low in organic matter is the correct answer. The soil in the tropical rainforest is nutrient-poor because heavy rainfall washes away the nutrients, and the soil contains a high level of aluminum and iron, which are toxic to plants. Due to these reasons, there is slow decomposition of organic matter that makes the soil low in organic matter.
Thus, the correct option is b.
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Why would writing the chemical formula only in its simplest form (empirical formula)
cause confusion when discussing a chemical molecule?
Writing the chemical formula only in its simplest form (empirical formula) helps to represent the relative proportions of atoms in a compound. It is useful for identifying the identity of an unknown compound and for predicting its properties.
How does the empirical formula differ from the molecular formula?The empirical formula represents the simplest whole-number ratio of atoms in a compound, whereas the molecular formula specifies the actual number of each type of atom in a molecule.
The empirical formula is useful for identifying the identity of an unknown compound and for predicting its properties.
Can the empirical formula be used to determine the molecular formula of a compound?Yes, the empirical formula can be used to determine the molecular formula of a compound, but additional information is needed, such as the molar mass of the compound.
Once the molar mass is known, the empirical formula can be used to calculate the molecular formula by determining the number of empirical formula units that would be needed to reach the molar mass.
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To describe the relative proportions of atoms in a compound, the chemical formula should only be written in its simplest form (empirical formula). It is helpful for figuring out a compound's identification and foretelling its properties.
What distinguishes the molecular formula from the empirical formula?The empirical formula defines the precise number of each type of atom in a molecule, whereas the empirical formula represents the simplest whole-number ratio of atoms in a compound.
The empirical formula can be used to determine a compound's identity and forecast its properties.
Can the molecular formula of a substance be determined using the empirical formula?The empirical formula can be used to ascertain the molecular formula of a combination, but other details, such as the compound's molar mass, are required.
The empirical formula can be used to determine the molecular formula once the molar mass is known by counting the number of empirical formula units required to get there.
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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
: 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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Discuss why Feldman and Frydman consider molecular chaperones critical for protein folding. Use at least two specific examples in detail
Feldman and Frydman consider molecular chaperones critical for protein folding because they play crucial roles in ensuring proper folding and preventing protein misfolding and aggregation.
One specific example is the chaperone Hsp70. Hsp70 binds to hydrophobic regions of unfolded or misfolded proteins, preventing their aggregation and assisting in their correct folding. Hsp70 accomplishes this by utilizing ATP hydrolysis to undergo conformational changes that allow it to bind to client proteins and facilitate their folding. Without Hsp70, misfolded proteins could aggregate and form toxic species associated with various diseases, such as neurodegenerative disorders.
Another example is the chaperonin GroEL/GroES system. GroEL is a large, multi-subunit complex that provides a confined environment for the folding of newly synthesized or stress-denatured proteins. GroES acts as a lid, enclosing the substrate protein within the GroEL cavity. The GroEL/GroES system facilitates protein folding by preventing misfolding and promoting proper folding through cycles of substrate binding and release. This chaperonin system is essential for the folding of many proteins, including enzymes involved in critical cellular processes.
Overall, molecular chaperones like Hsp70 and the GroEL/GroES system are crucial for protein folding because they help prevent protein misfolding, promote correct folding, and protect against protein aggregation, ensuring proper protein function and maintaining cellular homeostasis.
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An open flask sitting in a lab refrigerator looks empty, but it is actually filled with a mixture of gases called air. If the flask volume is 4.00 L, and the air is at standard temperature and pressure, how many gaseous molecules does the flask contain
Answer: \(1.07\times 10^{23}\) molecules
Explanation:
According to the ideal gas equation:
PV=nRT
P = Pressure of the gas = 1 atm ( at STP)
V= Volume of the gas = 4.00 L
T= Temperature of the gas in kelvin = 273 K ( at STP)
R= Gas constant = 0.0821Latm/kmol
n= moles of gas= ?
Putting in the values we get:
\(1atm\times 4.00L=n\times 0.0821Latm/Kmol\times 273K\)
\(n=0.178mol\)
Now 1 mole of any substance contains \(6.023\times 10^{23}\) molecules at STP
Thus 0.178 mole of any substance contains = \(\frac{6.023\times 10^{23}}{1}\times 0.178=1.07\times 10^{23}\) molecules at STP
Thus there are \(1.07\times 10^{23}\) gaseous molecules in the flask.
Question 28 (4 points)
Complete the following table:
Substance
pH
POH
[H] M
A
3.45
B
0.26
For the concentration fill in the blank, I used a decimal with a leading zero and two sig figs.
Answer:
Pls type your question in another manner cos I really cant decipher what you wrote the way you typed this pls
Which type of wave interaction is shown in the photo?
A. Absorption
B. Reflection
C. Refraction
We can see here that type of wave interaction is shown in the photo is: B. Reflection.
What is wave interaction?Wave interaction refers to the phenomena that occur when two or more waves come into contact with each other. When waves interact, they can produce various effects, such as interference, diffraction, reflection, refraction, and resonance. These interactions can significantly influence the behavior and properties of waves.
Reflection happens when waves encounter a boundary or surface and bounce back. The angle of incidence (the angle at which the wave strikes the surface) is equal to the angle of reflection (the angle at which the wave reflects off the surface), according to the law of reflection.
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For each of the following cases, decide whether the pH is less than 7, equal to 7, or greater than 7. a. Equal volumes of 0.15 M acetic acid, CH3 CO2H, and 0.15 M KOH are mixed The pH is
a. Equal volumes of 0.15 M acetic acid, CH3 CO2H, and 0.15 M KOH are mixed the pH is greater than 7.
When equal volumes of 0.15 M acetic acid, CH3CO2H, and 0.15 M KOH are mixed, they react to form a salt, potassium acetate, and water. The equation for this reaction is: CH3CO2H + KOH → CH3CO2K + H2O
Potassium acetate, CH3CO2K, is a salt of a weak acid (acetic acid) and a strong base (potassium hydroxide), which means that the resulting solution will be slightly basic (pH greater than 7). The reason for this is that the strong base will react completely with the weak acid, leaving behind some of the conjugate base, acetate ion, CH3CO2-. This acetate ion can then react with water to produce hydroxide ion, OH-. Therefore, the resulting solution will have more OH- ions than H+ ions, resulting in a pH greater than 7. In summary, when equal volumes of 0.15 M acetic acid and 0.15 M KOH are mixed, the pH will be greater than 7.
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The process of burning a fossil fuel to release energy is called
Answer:combustion
Explanation:
If you were to travel from the surface to the center of Earth, the temperature would
increase minimally(not too much).
O stay the same.
increase dramatically(a lot).
decrease dramatically.
Answer:
increase dramatically(a lot).
Explanation:
The core of the earth is way way way hotter than the surface.
when an acid such as hcl reacts with a metal, such as zinc (shown here) the gas produced is
When an acid such as hydrochloric acid (HCl) reacts with a metal like zinc (Zn), the gas produced is hydrogen gas (H₂).
When hydrochloric acid (HCl) reacts with zinc (Zn), something interesting happens. The acid gives away its hydrogen atoms (H⁺) to the zinc. At the same time, the zinc gives away some of its electrons. As a result, hydrogen gas (H₂) is produced. The gas forms little bubbles that you might see during the reaction. The remaining zinc combines with the chlorine atoms (Cl⁻) from the acid to form zinc chloride (ZnCl₂). So, to sum it up, when acid (like HCl) and metal (like zinc) react, they create hydrogen gas and a compound called zinc chloride. The hydrogen gas bubbles out, and the zinc chloride dissolves in the remaining acid.
A single displacement reaction, also known as a metal-acid reaction, occurs when hydrochloric acid (HCl) and zinc (Zn) are in contact. This reaction results in the creation of zinc chloride (ZnCl₂) and hydrogen gas (H₂) as the zinc metal displaces the hydrogen in the hydrochloric acid. While the acid's hydrogen ions lose electrons and undergo oxidation, the zinc atoms acquire electrons and undergo reduction. It is a redox (reduction-oxidation) reaction because it includes both oxidation and reduction reactions.
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