Temperature ______ as the average kinetic energy of a gas decreases
decreases
increases
Answers
Answer:
decreases
Explanation:
More molecules have lower speeds and fewer molecules have higher speeds, and the distribution shifts toward lower speeds overall, that is, to the left.
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Related Questions
Which major branch of chemistry would be most concerned
with studying a series of chemical reactions in order to
measure the amount of heat being released in each one?
Answers
Physical chemistry a major branch of chemistry would be most concerned with studying a series of chemical reactions in order to measure the amount of heat being released in each one.
Understanding the physical characteristics of atoms and molecules, how chemical processes take place, and what these characteristics indicate are the main goals of physical chemists. Their findings are based on an understanding of chemical characteristics and a description of how they behave utilizing physics theories and mathematical calculations.Thermochemistry, which encompasses the study of the heat energy of chemical processes occurring during phase transitions like gas to liquid or vice versa, is one of the main examples of physical chemistry. It provides information on entropy, heat capacity, Gibbs free energy, or formation heat.For more information on chemistry kindly visit to
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In what process is carbon transformed into chemical energy?.
Answers
Answer:
Photosynthesis !
Explanation:
Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.
A reaction is monitored and the products are found to be a salt and water. The reactant(s) must have been _____. two metal-nonmetal compounds a metal-nonmetal compound a metal and a metal-nonmetal compound an acid and a base
Answers
Answer:
D.) An acid and a base
Explanation:
One part of an acid is H+ and the other part is a negatively charged ion. One part of a base is -OH and the other part is a positively charged ion. When an acid and base react, the H+ and -OH combine to form water and the ions combine to form a salt.
The others are incorrect because they do not guarantee that water (H2O) and a salt are products.
The figure shows a tank with two immiscrble liquid is andar. The vacuum gauges hown indicates a reading of 17.17KPo Determire a) Absolut pressure at point [ b) Relative pressure atpoint F, with respect to the ain in the tank; that is, if said air were the environrent of the instrument of measurerest Patm =77.17[kpa]g=81 g=9.81[m(s2] Environmental temperatice: 20[∘C] δ=0.68δ=0.8
Answers
a) The absolute pressure at point B cannot be determined based on the given information.
b) The relative pressure at point F, with respect to the air in the tank, is also indeterminable with the provided information.
a) The absolute pressure at point B cannot be determined because the information about the liquid levels or the densities of the liquids in the tank is not provided.
The absolute pressure depends on the height of the liquid column and the density of the liquid, which are missing from the given data. Without this information, it is not possible to calculate the absolute pressure at point B.
b) The relative pressure at point F, with respect to the air in the tank, is also indeterminable. To calculate the relative pressure, we need to know the absolute pressure at point F and subtract the atmospheric pressure.
However, the absolute pressure at point F is not given, so we cannot determine the relative pressure. Additionally, the value of atmospheric pressure (Patm) provided is not relevant to calculating the relative pressure at point F.
In order to determine the absolute pressure at point B or the relative pressure at point F, we would need additional information such as the liquid levels in the tank, the densities of the liquids, and possibly the atmospheric pressure at point F.
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what is the formal charge on the central atom in a molecule of o3? hint: it may be helpful to draw the lewis structure for this molecule
Answers
A molecule's formal charge is the total of the formal charges of each of the constituent atoms that make up that particular molecule.
What is the Lewis structural rule?
Hydrogen atoms can only make one bond, and they are always located at the ends of atom chains. Hydrogen is usually associated with carbon, nitrogen, or oxygen. Oxygen atoms normally do not bond to one another, with the exception of O2, O3, superoxides, and peroxides.
Describe Lewis's structure with an example.
The octet rule, which states that atoms share electrons so that each has eight in its outer shell, is the foundation of a Lewis structure. For instance, the outer shell of an oxygen atom has six electrons.
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. in the first of this reaction, the concentration of dropped from to . what is the average rate of the reaction during this time interval?(remember to normalize the rate of the reaction for all reactants and products.)
Answers
To determine the average rate of the reaction during this time interval, we need to use the formula: average rate = change in concentration of reactant or product / time interval. In this case, we are given that the concentration of one reactant, which is not specified, dropped from a certain value to another value.
Since we do not have information about the other reactants or products involved in the reaction, we cannot normalize the rate of the reaction. Therefore, we can only calculate the average rate of the specified reactant using the given values.
The average rate can be calculated by dividing the change in concentration by the time interval in which the change occurred, which will give us the rate of the reaction in units of concentration per time.
The steps to calculate the average rate using the provided terms:
1. Identify the reactant whose concentration has dropped during the reaction. In this case, the reactant's concentration dropped from an initial concentration to a final concentration.
2. Calculate the change in concentration by subtracting the final concentration from the initial concentration.
3. Identify the time interval over which the reaction occurred.
4. Normalize the rate of reaction for all reactants and products, if necessary, by dividing the change in concentration by the stoichiometric coefficients of the respective reactants and products.
5. Calculate the average rate by dividing the normalized change in concentration by the time interval.
With the provided information, apply these steps to find the average rate of the reaction during the specified time interval.
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Four scientist collected data on the blood pressure of 30 people. Which scientist most likely had a problem with the experimental design?
Answers
Answer:
Scientist 3
Explanation:
An alpha particle is composed of He2+ ions?
true or false
Answers
Answer: The given statement is False.
Explanation:
Alpha particle is a helium nuclei.
Alpha particles are produced when a larger nuclei decays into smaller nuclei in radioactive decay. Alpha particles have mass number and atomic number as 4 and 2 respectively.
General representation of alpha decay :
\(^A_Z\textrm{X}\rightarrow ^{A-4}_{Z-2}\textrm{Y}+^4_2\textrm{He}\)
Thus the given statement that alpha particle is composed of \(He^{2+}\) ions is False.
The statement of \(\rm He^2^+\) ions has formed the alpha particles is true.
Alpha particles are particles that have been similar to the He-4, with the presence of two protons and two neutrons. The alpha particles have the absence of electrons and have been formed during the alpha decay.
\(\rm He^2^+\) has been the ion of He with the positive charge indicating the loss of 2 electrons. Thus, in \(\rm He^2^+\), there has been 2 protons, 2 neutrons, and 0 electrons.
The atomic configuration of \(\rm He^2^+\)has been similar to the alpha particles. Thus, the statement stating, "the alpha particles to be composed of \(\rm He^2^+\)ions " is True.
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According to the diagram above, when the north end of the Earth’s axis is tilted toward the sun, explain the suns effect on the North America.
A. North America will experience more indirect rays and shorter days
B. North America will experience more indirect rays and longer days.
C. North America will experience more direct rays and shorter days
D. North America will experience more direct rays and longer days.
Answers
Answer:
the answer is D
Explanation:
brainliest?
Which of the following sets of quantum numbers represents the last electron added to an arsenic atom (As)? n=4, l=2,m=0n=3, l=2, m=0n=3, l=1, m=0n=4, l=1, m=2n=4, l=1, m=0
Answers
The set of quantum numbers that represents the last electron added to an arsenic atom (As) is n=4, l=1, m=2.
An electron is a negatively charged particle that orbits the atomic nucleus in the atom's outermost shell. The electron contains practically no mass but has a charge of -1.
Quantum numbers help to explain and comprehend the structure of electrons. An electron is described by four quantum numbers, which give it a unique identification in a given atom's electronic configuration.
The sets of quantum numbers are: n, l, m, and s. Where n represents the principle quantum number, l is the angular momentum quantum number, m represents the magnetic quantum number, and s is the spin quantum number.
In the case of the last electron added to an arsenic atom (As), the set of quantum numbers that represents it is n=4, l=1, m=2. This is because the last electron added will fill in the outermost shell of the atom.
Therefore, the principle quantum number (n) is equal to 4 because the valence shell is in the fourth shell. l, which is the angular momentum quantum number, is equal to 1 because it is the valence shell's subshell.
Finally, m, the magnetic quantum number, is equal to 2 because of the orientation of the orbital in which the electron is present. As a result, the answer is n=4, l=1, m=2.
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Which of the following best describes compounds?
А
They can only be separated chemically.
B
They are always liquid at room temperature.
С
They contain the atoms of just one element.
D
They have the same peperties as their elements.
Answers
research the bicarbonate buffering system found in the bloodstream. write a paragraph or two discussing this system and how your breathing rate can cause acidosis and alkalosis.
Answers
Explanation:
The bicarbonate buffering system comprises weak carbonic acid and bicarbonate ions. Its function is to regulate the pH of the blood. When any acidic substance enters the blood, hydrogen ions are neutralized by the formation of carbonic acid and water. Given that carbonic acid is already part of the buffer system, the hydrogen ions are removed without altering the pH.
A decrease in breathing rate can cause acidosis when carbon dioxide accumulates in the blood. This problem can occur in obstructive and restrictive respiratory disorders or as a result of muscle weakness and poor respiratory drive. In contrast, respiratory alkalosis happens following too fast or very deep breathing that lowers the concentration of carbon dioxide in the blood.
The bicarbonate ions acts as a buffer for blood. When the blood pH increases by some way, it releases H+ ions whereas, when the pH is lower bicarbonate ions bind to the H+ ions to the make pH balanced.
What is buffer?A buffer is a chemical substance having a constant pH. It helps to maintain the pH in a desired range without undergoing a change itself. Acidosis is a state by which the blood pH reaches acidic. This state is caused by the respiratory rate imbalance.
If the respiration process fails to remove excess carbon dioxide it leads the blood too acidic , in this situation H+ ions combines with carbon dioxide forming carbonic acid. and bicarbonate ions.
When the reverse is happening where the blood pH is higher by alkalosis, the H+ ions are removed from the bicarbonate ions causing a lowering in the pH.
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Question 9What pressure will be exerted by 15 g of carbon dioxide gas in a 20 L container at 0 °C?
Answers
In this question, we need to find the value of pressure of a 15 grams sample of CO2 gas, and in order to find this value, we will be using the Ideal gas law formula, which is the following:
PV = nRT
Where:
P = pressure in atm
V = volume in liters, 20 Liters
n = number of moles
R = gas constant, 0.082
T = temperature in kelvin, 0°C = 273 K
The number of moles we need to find based on the mass in the question and based on the molar mass of CO2, 44g/mol:
44g = 1 mol
15g = x moles
44x = 15
x = 15/44
x = 0.34 moles of CO2 in 15 grams
Now we have the values to add to the formula:
P * 20 = 0.34 * 0.082 * 273
20P = 7.61
P = 7.61/20
P = 0.38 atm of pressure
The pressure will be 0.38 atm
which of the following statements correctly describe a resonance hybrid? select all that apply.multiple select question.the true structure of the resonance hybrid is the structure of the most stable contributor.the resonance hybrid is stabilized due to delocalization of electrons.a resonance hybrid rapidly interconverts between the possible resonance forms.equivalent resonance forms contribute equally to the overall structure of the hybrid.a resonance hybrid has a single structure.
Answers
The most stable contributor's structure is the genuine structure of the resonance hybrid. The delocalization of electrons is what stabilizes the resonance hybrid. The potential resonance forms are quickly interconverted by a resonance hybrid.
Equivalent resonance types equally contribute to the hybrid's overall structure. Consider the resonance hybrid structure of a carboxylate group as an example. Different resonance contributors do not always contribute equally to the hybrid structure until they are equivalent to one another in terms of stability, as is the case for the carboxylate group, which has equivalent contributions from A and B as shown in the given figure. One resonance structure will more closely resemble the “actual” (hybrid) structure than another if it is more stable (lower in energy) than the other.
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Bari oxit có công thức hóa hóa học là BaO . vậy bari oxit được tạo nên từ các nguyên tố
Answers
Answer:
Bari oxit được tạo nên từ các nguyên tố Bari (Ba) và Oxi (O)
Explanation:
Consider the reaction C($) + CO,C) = 2008). At 1273 K, the Kp value is 167.5. What is the Peo at equilibrium if the Pro, is 0.25 atm at this temperature? O a. 9.2 atm O b.3.2 atm c. 13 atm Ô d, 0.130 atm 0.6.5 atm 27
Answers
The partial pressure of CO (P_CO) at equilibrium is approximately 6.47 atm. Hence option e) 6.5 atm is correct.
C(s) + CO₂(g) ⇌ 2CO(g)
Since C is a solid, we only consider the gaseous species for equilibrium calculations. The Kp expression for this reaction is:
Kp = (P_CO)² / (P_CO₂)
Given that Kp = 167.5 and P_CO₂ = 0.25 atm, we can now solve for P_CO:
167.5 = (P_CO)² / 0.25
Rearrange the equation and solve for P_CO:
(P_CO)² = 167.5 * 0.25
P_CO = √(41.875) ≈ 6.47 atm
Therefore, the partial pressure of CO (P_CO) at equilibrium is approximately 6.47 atm.
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predict whether the h2so4, hso4- is conjugate acid/base pair or not. group of answer choices yes no
Answers
The H₂SO₄ (sulfuric acid) and HSO₄⁻ (hydrogen sulfate or bisulfate ion) are considered a conjugate acid-base pair. The correct answer is yes.
H₂SO₄ (sulfuric acid) and HSO₄⁻ (hydrogen sulfate or bisulfate ion) form a conjugate acid-base pair. In the context of the Bronsted-Lowry theory, an acid donates a proton (H+), while a base accepts a proton. When H2SO4 donates a proton, it becomes HSO₄⁻.
Conversely, when HSO₄⁻ accepts a proton, it reforms H₂SO₄. They are interconnected through the transfer of a proton, thus qualifying as a conjugate acid-base pair. This relationship allows for the reversible conversion between the two species through proton transfer reactions. Therefore, yes, H₂SO₄ and HSO₄⁻ are considered a conjugate acid-base pair.
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a sample of 1.000 m nitric acid was added to the water sample above. what is the resulting ph?
Answers
Adding 1.000 m nitric acid to a neutral solution (pH 7.0) will result in a pH of less than 1. In order to determine the resulting pH of the water sample after the addition of 1.000 m nitric acid, we need to take into account the acid dissociation constant (Ka) of nitric acid and the initial pH of the water sample.
Nitric acid (HNO₃) is a strong acid, which means that it completely dissociates in water to form H⁺ and NO₃⁻ ions. The acid dissociation constant (Ka) of nitric acid is 24.8 x 10⁻⁵, which means that it has a very high tendency to dissociate in water.
When 1.000 m nitric acid is added to the water sample, the H⁺ ions will react with the H₂O molecules in the water to form H₃O⁺ ions. This will result in an increase in the concentration of H₃O⁺ ions in the solution, which will decrease the pH of the solution.
The exact change in pH will depend on the initial pH of the water sample and the amount of nitric acid added. Without knowing the initial pH of the water sample, it is difficult to determine the resulting pH after the addition of nitric acid.
In general, adding 1.000 m nitric acid to a neutral solution (pH 7.0) will result in a pH of less than 1. Adding 1.000 m nitric acid to a slightly acidic solution (pH 5.0) will result in a pH of around 1.5. Adding 1.000 m nitric acid to a more acidic solution (pH 3.0) will result in a pH of around 3.5.
Therefore, the resulting pH of the water sample after the addition of 1.000 m nitric acid will depend on the initial pH of the water sample. If the initial pH is known, it can be used to calculate the resulting pH using the acid dissociation constant and the concentration of the nitric acid added.
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One of the scientists interviewed for the article said, "Almost certainly this
effect has already ended." If he is correct, what evidence would you expect to
see to support his statement?
Answers
Answer:
The scientist is referring to the unusually slow growth rate of carbon dioxide occurring recently. As that slow growth rate ends, the rate of increase of carbon dioxide in the atmosphere should go up soon.
Explanation:This is the exact answer so switch it up.
to achieve full octet and atom with 7 valence electrons is most likely to
Answers
The given atom with 7 valence electrons is most likely to gain one more electron to achieve a full octet.
Given:
An atom with 7 valence electrons
To find:
Number electrons to achieve full octet by a given atom
Solution:
The number of valence electrons in a given atom is 7.The number of valence electrons is 7 which means that the given atom will be a member of the halogen family.And as we know that halogen possesses one less electron to complete their octets. They by gaining one electron they achieve full octet and stability.Similarly, the given atom with 7 valence electrons is most likely to gain one more electron to achieve a full octet.
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A pharmaceutical company states in advertisements that their new ScarX Cream is guaranteed to erase scars in one month.
The company based their claims on a study done by the company's dermatologists.
The study showed that 84 percent of users said the sizes of their scars were reduced after using the product for 50 days. Do the study results support the company's claims?
Answers
Answer:d
Explanation:
the results indicated
Answer:
No, the results indicated that the scars were reduced, not erased.
Explanation:
beacuse i got it correct
Explain why Wegner believed the plates were all connected at one point in time.
Answers
Answer:
becuase ihe ewas avery smart man and knew right for wrong and always gtooa a 100% on hes test
Explanation:
becauxse i red buk aboiut it
Briefly explain how a barometer is used to
measure atmospheric pressure?
Answers
Answer:
A mercury barometer is an instrument used to measure atmospheric pressure in a certain location and has a vertical glass tube closed at the top sitting in an open mercury-filled basin at the bottom. Mercury in the tube adjusts until the weight of it balances the atmospheric force exerted on the reservoir.
Nevada's annual precipitation averages between 21 and 24 cm. In comparison,Washington state averages between 96 and 97 cm of precipitation per year. Which of these factors has the greatest impact on the difference in precipitation between these two states?
Answers
Answer:
Mountain ranges and prevailing winds.
Explanation:
Mountain ranges and prevailing winds are the factors that is responsible for the difference in the precipitation between Nevada and Washington states. The Washington state is located along the coastal region of pacific ocean and having more mountain ranges which causes more rainfall in that region while on the other hand, Nevada state comprise of plateau, basins and far away from the ocean which is the main cause of lower rainfall as compared to Washington state.
the element antimony has two stable isotopes, antimony-121 with a mass of 120.90 u and antimony-123 with a mass of 122.90 u. from the atomic mass of sb, 121.76 u, one can conclude that:
Answers
From the atomic mass of Sb, 121.76 u, one can conclude that the element antimony has more of isotope Antimony-123.
Explanation:
Antimony is an element that has two stable isotopes:
antimony-121 and antimony-123 with masses of 120.90 u and 122.90 u, respectively. The atomic mass of Sb, 121.76 u, can be used to conclude that antimony has a greater percentage of antimony-123 than antimony-121.
Let's calculate the percentage of antimony-121 and antimony-123 in antimony as follows:
Suppose x is the percentage of antimony-121, and (100 - x) is the percentage of antimony-123 in antimony.
At this point, we can use the average atomic mass of antimony and mass of antimony-121 and antimony-123 to calculate x as follows:
x = ((121.76 u) - (122.90 u) (100 - x)) / (120.90 u - 122.90 u) = (121.76 u - 122.90 u + 122.90 x) / (-2.00 u) = (122.90 x - 1.14 u)
/-2.00 u Solving for x gives x = 42.7%
Therefore, we can conclude that antimony has more of isotope Antimony-123.
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perform the following operation and express the answer in scientific notation 5.7365 x 10^-5 / 3.4891 x 10^-8
Answers
The e answer in scientific notation 5.7365 x\(10^{-5}\)/ 3.4891 x \(10^{-8}\) is 1.64 x \(10^{3}\) .
Calculation ,
5.7365 x \(10^{-5}\) / 3.4891 x \(10^{-8}\) = 1.64 x \(10^{3}\) = 1644
Below are the five guidelines for scientific notation:
1. The base must always be 10.
2. The exponent must be an integer that is non-zero, meaning it may be positive or negative.
3. The coefficient's absolute value is more than or equal to 1, but it must be less than 10.
4. Both whole and decimal numbers, including positive and negative numbers, can be used as coefficients.
5. The remaining significant digits of the number are carried by the mantissa.
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Do I use molar mass when the problem gives me grams? (Yes or No), Right answer gets brainliest.
(Stoichiometry Review)
Answers
Answer:
yes
Explanation:
yes because the molar mass is an intensive property of the substance, that does not depend on the size of the sample. In the International System of Units (SI), the base unit of molar mass is kg/mol. However, for historical reasons, molar masses are almost always expressed in g/mol.
Answer:
Yes, if your calculating from grams to moles.
The oxidation number of Oxygen is -2, and that of chlorine is -1. Use this information to match the names of the compounds to their chemical formulas.
MnCl2 ->
MnO2 ->
Answer options:
manganese (ll) fluoride
manganese (IV) chloride
manganese (II) oxide
manganese (IV) oxide
Answers
Answer:
MnCl₂ → manganese (ll) chloride
MnO₂ → manganese (IV) oxide
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Cordell bought new tires for his bicycle. As he rode his bike on the hot street, the temperature of the air in the tires increased. If the volume of the air stayed the same, what happened to the pressure inside the tires?
A. It decreased. B. It increased. C. It stayed the same. D. It was inversely proportional to the temperature
Answers
Answer: The answer is B. The pressure inside the tires increased.
Explanation:
The relationship between the pressure, volume, and temperature of a gas is described by the ideal gas law, which is usually written as:
\($$PV = nRT$$\)
where:
- \(\(P\)\) is the pressure,
- \(\(V\)\) is the volume,
- \(\(n\)\) is the number of moles of gas,
- \(\(R\)\) is the ideal gas constant, and
- \(\(T\)\) is the temperature (in Kelvin).
In this case, the volume \(\(V\)\) and the number of moles \(\(n\)\) of air in the tires stay the same. The temperature \(\(T\)\) is increasing. Therefore, for the equation to remain balanced, the pressure \(\(P\)\) must also increase.
So, the answer is B. The pressure inside the tires increased.
what is the correct structure of the cyclic hemiacetal that forms under acidic conditions when 5-hydroxy-4-methylpentanal cyclizes?
Answers
The correct structure of the cyclic hemiacetal that forms under acidic conditions when 5-hydroxy-4-methylpentanal cyclizes is attached below.
How do compounds form under acidic conditions?In this structure, the aldehyde group (CHO) and the hydroxyl group (OH) on the same molecule have reacted to form a cyclic hemiacetal. The carbon atom in the aldehyde group has formed a bond with the oxygen atom in the hydroxyl group, resulting in a five-membered ring structure.
The hemiacetal group (-CH(OH)-) is attached to the second carbon atom in the chain, which is also methyl-substituted (H3C-) and located next to the oxygen atom in the ring.
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