Answers
Answer
False
Explanation:
Related Questions
Stephan’s mother cuts a twig from a rose bush and plants it in the soil. After a few days, Stephan observes a new plant growing. Which characteristic does the growth of the new plant depict?
Answers
The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.
Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.
The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.
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for the reaction below identify the structure of the product with appropriate formal charges and the appropriate number of hydrogens on the nitrogen atom
Answers
The given question is incomplete, hence, can not be answered. Still, adding some relevant information for your reference.
What are formal charges?
Formal charge (FC) is the charge associated with the atoms in a molecule, assuming that the electrons of all chemical bonds are shared equally between atoms, regardless of their relative electronegativities. In determining the optimal Lewis structure (or dominant resonance structure) of a molecule, structures are chosen such that the formal charge of each atom is as close to zero as possible.
In chemistry, the formal charge in the covalent view of a chemical bond is assigned to the atoms in a molecule assuming that all chemical bond electrons are equally shared between atoms, regardless of their relative electronegativities. is the virtual charge that Simply put, the formal charge is the difference between the number of valence electrons of an atom in the neutral free state and the number assigned to that atom in the Lewis structure. In determining the optimal Lewis structure (or dominant resonance structure) of a molecule, structures are chosen such that the formal charge of each atom is as close to zero as possible.
The given question is incomplete, hence, can not be answered. Still, adding some relevant information for your reference.
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The diagrams to the right show the distribution and arrangement of gas particles in two different containers. According to kinetic-molecular theory, which of the following statements is true? Check all that apply. If the temperatures of both containers are equal, container A has greater pressure than container B. If the volume of container A decreased, its pressure would decrease. If the pressure in both containers is equal, container A has a lower temperature than container B. Two containers are shown. Container A is square, and Container B is the same height, but is about twice as wide. Each container holds 6 gas particles distributed randomly.
Answers
The kinetic-molecular theory's true assertions are as follows:
If both containers' temperatures are the same, container A will have a higher pressure than container B.
Container A has a lower temperature than container B if the pressure in both containers is equal.
What is the kinetic theory of molecules?The molecules that make up a gas are always moving randomly, colliding with one another and the container walls, according to the kinetic molecular hypothesis. Remember that high temperature and low pressure are the only conditions in which perfect gases can exist.
The kinetic-molecular theory's true assertions are as follows:
If both containers' temperatures are the same, container A will have a higher pressure than container B.
If both are under pressure
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How many moles are in 3.46 g of chromium?
Answers
Answer:
0.06654345229738384 moles of chromium.
Calculate the hydrogen ion concentration of a Sulfuric acid solution with a pH of 3.21.
[H+] = _______ M (round to 3 sig figs)
(40 points)
Answers
The hydrogen ion concentration of the Sulfuric acid solution is 6.53 x \(10^{-4}\) M.
What is concentration of [H+] ?
The pH is defined as the negative logarithm of the hydrogen ion concentration:
pH = -log[H+]
Rearranging this equation, we get:
[H+] = \(10^{(-pH)}\)
Substituting the given pH of 3.21 into this equation, we get:
[H+] = \(10^{(-3.21)}\)
Using a calculator, we find that:
[H+] = 6.53 x \(10^{-4}\) M
Therefore, the hydrogen ion concentration of the Sulfuric acid solution is 6.53 x \(10^{-4}\) M.
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Complete question is: The hydrogen ion concentration of a Sulfuric acid solution with a pH of 3.21. [H+] = 6.53 x \(10^{-4}\) M.
The air particles in the jar become smaller.
Answers
How does a Sulfur 2 ion differ from a neutral Sulfur atom?
O
Mass number
Atomic number
Number of electrons
Proton number
Answers
Answer:
o
Mass number
Atomic number
Number of electrons
Proton number
Explanation:
Michelle is trying to find the average atomic mass of a sample of an unknown
element. She finds that her sample contains 59.34% of an isotope with a mass of
113.6459, while the rest of the sample is an isotope with a mass of 115.8488. What
is the average atomic mass of her sample? Please round your answer to 0.01 amu.
Answers
The average atomic mass of her sample is 114.54 amu
Let the 1st isotope be A
Let the 2nd isotope be B
From the question given above, the following data were obtained:
Abundance of isotope A (A%) = 59.34% Mass of isotope A = 113.6459 amuMass of isotope B = 115.8488 amuAbundance of isotope B (B%) = 100 – 59.34 = 40.66%Average atomic mass =?The average atomic mass of the sample can be obtained as follow:
\(Average \: atomic \: mass \: = \frac{mass \: of \: A \times A\%}{100} + \frac{mass \: of \: B \times B\%}{100} \\ \\ Average \: atomic \: mass \: = \frac{113.6459\times 59.34}{100} + \frac{115.8488\times 40.66}{100} \\ \\ Average \: atomic \: mass \: = 114.54 \: amu \\ \\ \)
Thus, the average atomic mass of the sample is 114.54 amu
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Calculate the N/Z ratio for elements with atomic numbers 104 through 109. Are they in the belt of stability? Are they stable? How do you know?
Answers
The ratio of neutrons to protons, or the N/Z ratio, plays a crucial role in determining a nucleus' stability. The range of N/Z ratios in which nuclei are stable is generally referred to as the belt of stability.
How can you tell whether a substance is stable or unstable?If the forces between the constituents of the nucleus are equal, an atom is stable. If these forces are out of balance or if the nucleus has an excessive amount of internal energy, an atom is unstable (radioactive).
Z = 104 for Rutherfordium, element 104. The isotopes 261Rf and 262Rf, having masses of 261 and 262, respectively, have the longest half-lives. Accordingly, N/Z ratios are:
261Rf: N/Z = (261-104)/157 = 1.08
262Rf: N/Z = (262-104)/158 = 1.09
These N/Z ratios are a little bit higher than the average belt of stability values, which are about 1.0 for heavy nuclei. These isotopes are thought to be reasonably stable because they are close enough.
Z = 109 for Meitnerium, element 109. The isotopes 278Mt and 282Mt, with masses of 278 and 282, respectively, have the longest half-lives. Accordingly, N/Z ratios are:
278Mt: N/Z
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Compare chemical equations to math equations.
Answers
Answer:
They both have letters and different formulas to find the answer.
Explanation:
What is the frequency of a photon that has 3.82 x 10^-20 J of energy?
Answers
Answer:
5.73498*10^13
Explanation:
............
"At constant pressure, the volume of a fixed amount of gas is directly proportional to its absolute temperature." This is -
Answers
Answer: B
Explanation:
According to Charle's law, at constant pressure the volume of a fixed mass of a ga is directly proportional to its absolute temperature.
At constant pressure, V∝T.
I will give 15 points
Answers
Answer:
the question is not visible clearly....
Answer:
a and d
Explanation:
I believe this is it
What type of reaction will occur if AH is negative and entropy increases?
O spontaneous reaction
O Gibbs free reaction
O exothermic reaction
endothermic reaction
Answers
The type of reaction that will occur if AH is negative and entropy increases is option A which is a spontaneous reaction .
Spontaneous reaction explained.The spontaneity of any chemical reaction depends on the Gibbs free reaction which is related to entropy change and enthalpy change.ΔG= ΔH-TΔS
Where T is temperature change in kelvin.If AH is negative, entropy will increases which is ΔS. Then the ΔG will depend on the temperature change.
If TΔS is larger than ΔH, the reaction will be spontaneous and ΔG will be negative which means the reaction will move forward without any external input.
When a change in entropy increases with the temperature in the system, the reaction will be spontaneous and this will make the Gibbs free energy to be negative.
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Science has had no negative impacts on society. Please select the best answer from the choices provided T F
Answers
Answer:
false
Explanation:
not all science is good, or has good effects
False.
Science can possibly be dangerous when used by the wrong people. It can be used to create bombs, bioweapons, and much more.
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How do particles tend to move in solids?
They vibrate about fixed points.
They move randomly through the solid while remaining in close contact with other particles.
They move in orbits around a center.
They move randomly through the solid and separately from other particles.
Answers
A student wants to know which part of his local beach contains the most turtle nests during nesting season. He researches turtle nesting, makes a prediction to investigate based on his research and observations, and plans his experiment. He performs the experiment, and once his experiment is completed, he writes down his data and ends his study.
What part of the scientific method is he missing from this investigation?
A). Analyze data and conclusion.
B). Construct a hypothesis.
C). Do background research.
D). Test with an experiment.
Answers
Answer: A
Explanation:
the human population grew form 1 billion in the year 1800to blank billion in the year 200
Answers
The human population grew from 1 billion in the year 1800 to approximately 7.8 billion in the year 2021.
In the year 1800, the estimated global human population was around 1 billion. Over the next two centuries, significant advancements in technology, medicine, agriculture, and improved living conditions contributed to a rapid increase in population.
The growth rate of the human population began to accelerate in the 20th century. By the year 1927, the global population reached 2 billion. It took just 33 years for the population to double, reaching 4 billion in 1960. The population continued to grow at an unprecedented rate, with 6 billion people on Earth by the year 1999. As of 2021, the estimated global population stands at approximately 7.8 billion.
This remarkable growth in population can be attributed to several factors, including advancements in healthcare leading to reduced infant mortality rates, improved access to education and contraception, increased agricultural productivity, and overall socio-economic development.
It's important to note that population growth has not been uniform across all regions. Different countries and regions have experienced varying rates of population growth due to factors such as fertility rates, mortality rates, migration patterns, and government policies.
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H₂PO4 + 3 KOH --- ----> K₂PO4 + 3 H₂O
2. If 49.0 g of H3PO4 is reacted with excess KOH, determine the percent yield of K,PO, if
you isolate 49.0 g of K3PO4.
Answers
The percentage of yield of K₂PO₄ obtained from the reaction of 49.0 g of H₃PO₄ is 46.2%
How do i determine the percentage yield of K₂PO₄?We'll begin by obtaining the theoretical yield of K₂PO₄. Details below:
H₃PO₄ + 3KOH -> K₃PO₄ + 3H₂O
Molar mass of H₃PO₄ = 98 g/molMass of H₃PO₄ from the balanced equation = 1 × 98 = 98 gMolar mass of K₃PO₄ = 212 g/mol Mass of K₃PO₄ from the balanced equation = 1 × 212 = 212 gFrom the balanced equation above,
98 g of H₃PO₄ reacted to produce 212 g of K₃PO₄
Therefore,
49 g of H₃PO₄ will react to produce = (49 × 212) / 98 = 106 g of K₃PO₄
Thus, the theoretical yield of K₃PO₄ obtained is 106 g
Now, we shall determine the percentage yield of K₃PO₄. Details below:
Actual yield of K₃PO₄ = 49 gTheoretical yield of K₃PO₄ = 106 gPercentage yield of K₃PO₄ =?Percentage yield = (Actual /Theoretical) × 100
Percentage yield of K₃PO₄ = (49 / 106) × 100
Percentage yield of K₃PO₄ = 46.2%
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Using Boyle's Law solve the following: An unknown gas has a volume of 200.0 mL and a pressure of 350.0 torr, pressure were increased to 700.0 torr, what is the resulting volume?
Answers
Answer:
400 mL
Explanation:
Boyle's Law: \(P_1*V_1 = P_2*V_2\)
Let x = the resulting volume
350 (200) = 700 (x)
x = 400 mL
Calculate the pH of a solution prepared by dissolving 1.60 g of sodium acetate, CH3COONa, in 50.0 mL of 0.10 M acetic acid, CH3COOH(aq). Assume the volume change upon dissolving the sodium acetate is negligible. Ka of CH3COOH is 1.75 x 10^-5.
Answers
Answer:
pH = 5.35
Explanation:
Given 1.60 grams sodium acetate (NaOAc(aq))*** added to 50ml of 0.10M acetic acid (HOAc(aq)) solution.
Applying common ion effect keeping in mind that the addition of NaOAc provides the common-ion (OAc⁻).
HOAc(aq) ⇄ H⁺(aq) + OAc⁻(aq)
I 0.10m 1.32 x 10⁻³M ≈ ∅M* (1.6g/82.03g/mol) / 0.050L = 0.39M
C -x +x 0.39M + x ≈ 0.39M**
E 0.10M - x x 0.39M
≈ 0.10M
Ka = [H⁺][OAC⁻]/[HOAC] => [H⁺] = Ka·[HOAc] / [OAc⁻]
[H⁺] = (1.75 X 10⁻⁵)(0.10) / (0.39) = 4.5 x 10⁻⁶M
∴ pH = -log[H⁺] = -log(4.5 x 10⁻⁶) = -(-5.35) = 5.35
_______________________________________________
* [H⁺] before adding NaOAc = SqrRt(Ka · [HOAc]) = SqrRt(1.75 x 10⁻⁵· 0.10) = 1.32 x 10⁻³M. Since this concentration value is so small, the initial [H⁺] is assumed to be zero molar (∅M).
** The added [H⁺] is negligible and dropped in the ICE table. That is, adding ~[H⁺] in the order of 10⁻³M does not change the H⁺ ion concentration sufficiently to affect problem outcome and is therefore dropped in the ICE table.
*** Acetic Acid and Sodium Acetate are frequently written HOAc and NaOAc where the OAc⁻ anion is the acetate ion (CH₃COO⁻) for brevity.
The pH of the solution measures the acid of the liquid throughout the molar concentration of hydrogen ions in a solution.
\(\bold{CH_3COONa \ mass = 1.60\ g}\\\\\)
Solution Volume (V) \(=50.0\ mL =0.05\ L\\\\\)
\(\bold{CH3COONa \ molarity =0.10\ M }\)
\(\bold{\text{Calculating the CH3COONa moles} =\frac{mass}{molar\ mass}}\)
\(= \frac{1.60\ g}{82.03\frac{g}{mol}} \\\\=0.0195\ mol\\\\\)
\(\bold{M = \frac{ \text{amount of solute moles} } { \text{solution volume in L} }}\)
\(= \frac{0.0195\ mol}{0.05\ L}\\\\ =0.39\ M\)
Using Henderson Hasselbach equation:
\(\bold{pH = -\log K_{a} + \log{[salt]}{[acid]}}\\\\\)
\(=\bold{ -\log (1.75\times 10^{-5}) + \log ( \frac{0.39}{0.10}) }\\\\=\bold{ 4.757 + \log (3.9)}\\\\=\bold{ 4.757 + 0.5910}\\\\=\bold{ 5.348}\\\\=\bold{ 5.35}\\\)
So, the final answer is "5.35".
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What is the product of the first beta decay in this series?
A)
AC-227
B)
Ac 228
Ra-227
D
Rn 224
Answers
Answer:
B)
Explanation:
In beta decay the nucleus loses a neutron and gains a proton. The mass therefore remains constant but the atomic number increases by one.
For the given reaction, if we have 4 moles of C3H8 and 10 moles of O2, which is the limiting reactant?C3H8 + 5 O2 → 4 H2O + 3 CO2Select one:a.H2Ob.O2c. C3H8d.CO2Can you show steps to figure this out
Answers
To find the limiting reactant we have to divide each amount of moles by the stoichiometric coefficient of the corresponding substance.
It means that we have to divide the number of moles of C3H8 by 1 and the number of moles of O2 by 5.
\(\begin{gathered} \frac{4molC_3H_8}{1molC_3H_8}=4 \\ \frac{10molO_2}{5molO_2}=2 \end{gathered}\)The least quotient will indicate that that substance is the limiting reactant.
It means that the limiting reactant is O2.
What is the main disadvantage of parallel circuits?
Any break in the circuit stops the flow of charges.
There are multiple paths for charges to flow.
If one bulb goes out, the other bulbs will go out.
They are complicated to design and build.
Answers
Answer:
Hi there!!!! The answer is D. Have a good day
Explanation:
The parallel circuit is the most common type of electrical circuit used in houses and equipment. It generates more stable and efficient power system. They are complicated to design and build is the main disadvantage of parallel circuits. The correct option is D.
What are parallel circuits?A circuit is said to be in parallel in connection when the electric current has multiple paths to flow through. The components which are a part of the parallel circuits will have a constant voltage across all ends.
The major disadvantages of parallel circuits are, it requires the use of a lot of wires, it is not possible to increase or multiply the voltage in a parallel circuit. The parallel connection also fails at the time when it is needed to pass same quantity of current through the units.
Thus the correct option is D.
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Which of the following is true for polar jet streams?
They bring cool air.
They bring warm air.
They blow at the equator.
They blow from north to south.
Answers
Answer:
A: They bring cool air.
Explanation:
Took the test and got it correct. :)
Jet streams are fast flowing meandering air currents. Polar jet streams bring cool air through the atmosphere. Polar jets meet subtropical jets at some regions.
What are polar jet streams ?The polar jet stream, which travels through the lower layers of the atmosphere in the Northern Hemisphere, is a swiftly moving band of westerly winds.
The confluence of warm air ascending from the tropics and cold air masses descending from the arctic produces the jet. The denser cold air lowers and deflects the warmer air areas north, creating deep troughs and steep ridges that give the jet stream its wavy appearance.
As pockets of cold air intermittently sneak down from the Arctic, this pattern spreads across the mid-latitudes of North America, Europe, and Asia, producing opposing waves and flows that speed eastward due to the earth's rotation.
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The single strand of nucleic acid shown is representative of
A). RNA
B). DNA
C). both RNA and DNA
D). protein
Answers
i will mark u as branliest
Answers
Answer:
a
Explanation:
2,3,7,9-tetramethyl-5-(1-metilbutil)decano
Answers
The IUPAC name for 2,3,7,9-tetramethyl-5-(1-methylbutyl)decanoic acid is 2,3,7,9-tetramethyl-5-(1-methylbutyl)decanoic acid. It is a carboxylic acid with a molecular formula of C20H40O2 and a molecular mass of 312.54 g/mol. The compound has a melting point range of 70-75°C.
2,3,7,9-tetramethyl-5-(1-methylbutyl)decanoic acid contains a carboxyl group (-COOH), which is the functional group responsible for its acidic properties and solubility in water. The presence of the carboxyl group makes the compound more polar than similar molecules, enhancing its water solubility. Carboxylic acids are also known for their reactivity with bases and ability to undergo esterification reactions.
In summary, 2,3,7,9-tetramethyl-5-(1-methylbutyl)decanoic acid is a carboxylic acid with a unique molecular structure. Its IUPAC name describes the positions and nature of the substituent groups. The presence of the carboxyl group contributes to its polarity, water solubility, acidity, and reactivity with bases and esterification reactions. The compound's characteristics are significant in understanding its properties and potential applications in various chemical reactions and processes.
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Transverse waves move the medium perpendicular
true or false
Answers
Answer:
True
Explanation:
Example of change in substance
Answers
The original substance has undergone a transformation into a new substance with different properties, indicating a change in the chemical composition of the material.
An example of a change in substance is the process of combustion. When a substance, such as wood, is burned, it undergoes a chemical reaction with oxygen in the air, which produces a new substance: carbon dioxide gas, water vapor, and ash. This change in the chemical composition of the wood means that it has transformed into a completely new substance with different physical and chemical properties.
Another example is the process of electrolysis, where an electric current is passed through a solution containing ions. This can cause a chemical reaction to occur, resulting in the breakdown of the original substance into its component parts or the formation of a new substance.
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