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What is the molarity of 2.00L of a solution containing 1.00 mole of KCl?
0.500M 1.00M 2.00M .100M
Answers
Answer:
Explanation:
Molarity = mols/volume
M = 1/2
M = 0.500 M
Related Questions
for the dyes synthesized from a naphthol starting material, did the position of the hydroxyl group an effect on the wavelength of light that was absorbed by the dyes? explain g
Answers
Yes, the position of the hydroxyl group does have an effect on the wavelength of light absorbed by the dyes synthesized from a naphthol starting material.
This is because the position of the hydroxyl group determines the electronic properties of the molecule, which in turn affects the energy levels and transitions that occur when the molecule absorbs light. In general, molecules with hydroxyl groups attached to positions closer to the aromatic ring will absorb light at shorter wavelengths (higher energy), while those with hydroxyl groups attached to positions farther from the ring will absorb light at longer wavelengths (lower energy).
This phenomenon is known as the bathochromic or hypsochromic effect, depending on whether the shift is toward longer or shorter wavelengths, respectively.
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how is the rate of reaction related to the rate of consumption of a reactant and its stoichiometric coefficient? provide your answer using a grammatically correct sentence.
Answers
The rate of reaction is directly proportional to the rate of consumption of a reactant and its stoichiometric coefficient.
The rate of reaction refers to the change in the concentration of a reactant or product over time, and it is directly proportional to the stoichiometric coefficient of the reactant. For example, if a reactant has a stoichiometric coefficient of 2 in a reaction, it will be consumed twice as fast as a reactant with a coefficient of 1. The rate of reaction can be determined by measuring the change in concentration of the reactant over time and using the stoichiometry of the reaction to calculate the rate. This relationship is crucial in understanding how reactions proceed and how to control their speed by manipulating the concentration of reactants and products.
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What is the symbol of the element for 38 protons, 36 electrons, and 40 neutrons?
Answers
The element with 38 protons, 36 electrons, and 40 neutrons is Strontium (Sr).
Strontium (Sr) is the element with 38 protons, 36 electrons, and 40 neutrons. It belongs to the alkaline earth metal group on the periodic table. The atomic number of an element corresponds to the number of protons in its nucleus, so in this case, the atomic number is 38. Since atoms are electrically neutral, the number of electrons in an atom is also equal to the number of protons. Therefore, there are 36 electrons surrounding the nucleus of the strontium atom.
The total number of protons and neutrons in an atom is known as the mass number. In this case, the mass number is 38 (protons) + 40 (neutrons) = 78. Strontium has various isotopes, which are atoms with the same number of protons but different numbers of neutrons. The most common isotope of strontium, with a mass number of 88, has 50 neutrons. However, the specific isotope mentioned in the question has a mass number of 78 and 40 neutrons.
Strontium is a soft, silvery-white metallic element that is highly reactive with water and air. It is commonly used in pyrotechnics to produce red-colored flames. Strontium compounds are also utilized in the manufacturing of ceramics, glass, and fireworks. Its radioactive isotope, strontium-90, has been used in medical imaging and cancer treatments.
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What volume of SO2, at room temperature and pressure is produced on heating 9.7g
of Zinc Sulphide (ZnS) if reaction takes place as follows
2ZnS()+ 302(g)
→2ZnO(+2SO2(g)
(A) 2.4 dm³
(B) 4.8 dm³
(C) none of these
Answers
Answer:
C. None of these
2 volumes of zinc sulphide produces two volumes of Sulphur dioxide. So, 9.7g of ZnS will produce nothing less than 9.7g of SO2.
Question
Drag each label to the correct location in the table
Match each career to the correct career pathway.
Science and Mathematics
Engineering and Technology
anthropologist
fuel ce technician
Civil drafter
computer programmer
meteorologs
electrice
Submit
Answers
Answer: Science and Mathematics- Anthropologist, Meteorologist
Engineering and technology- Fuel Cell Technician, Computer programmer, electrical Drafter, Civil Drafter
Answer:
i have the same question
Explanation:math and science is the meteorologs and the anthropologist
What are the 4 steps of the enzymatic cycle?
Answers
The enzymatic cycle has four steps, and they include the following;
1. The reaction between the Enzyme and Substrate
2. The substrate/enzyme complex formation
3. Catalysis
4. Enzyme releases a product
A small molecule will attach to the enzyme's active site and stop the action. The plants adapt by changing amino acid(s) in the enzyme. They adjust the structure and are continuously active; the small molecule cannot limit this enzyme.
The four steps in an enzyme cycle are;
1. The substrate and enzyme are found in one region. There are times when there is more than one substrate molecule and the enzyme changes.
2. The enzyme will then be trapped on the substrate in the special region called the active site. The combination is called substrate/enzyme complex. The active site will be in a shaped special region for the enzyme, which fits around a substrate.
3. Catalysis will happen when the Substrate changes. It can be broken down or combined with other molecules forming something new. It will break and form chemical bonds; afterward, a product/enzyme complex will occur.
4. The enzyme will release a product. When the enzyme is relaxed, it will return to its original shape and be ready to work on the other substrate molecule.
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What is the mass of a bar of zinc measuring 2.5 cm by 4.0cm by 6.0cm if the density of zinc is 7.62cm
D=
M=
V=
Answers
The mass of the sample is the product of its volume and density. The mass of the zinc sample is 457.2 g.
What is density?
Density of a sample is its measure of mass per unit volume. It tells how much denser the substance is in a given volume. The volume of the substance is the space occupied by it.
Volume of a solid is the product of its length, breadth and height.
Given the dimensions of Zn sample is 2.5, 4 and 6 cm.
volume = 2.5 × 4 × 6 cm
= 60 cm³
Density = 7.62 g/cm³.
Mass of the sample is the product of its volume and density. Thus, mass of zinc sample is:
mass of Zn = volume × density
= 7.62 g/cm³ × 60 cm³
= 457.2 g.
Therefore, the mass of the Zn sample is 457.2 g.
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According to the Law of Conservation of Matter _______.
a. No atoms are created or destroyed whenever matter undergoes a physical change but can when matter undergoes a chemical change.
b. Atoms are created but not destroyed whenever matter undergoes a physical or chemical change.
c. Atoms are destroyed but not created whenever matter undergoes a physical or chemical change Some atoms are created or destroyed whenever matter undergoes a physical or chemical change.
d. No atoms are created or destroyed whenever matter undergoes a physical or chemical change.
Answers
Answer:
A.
Explanation:
Matter is neither created nor destroyed unless it is acted upon by a chemical force/change.
What do modern scientist use in classifying organisms that Linnaeus did not use?
Answers
Answer:
The taxonomic units in modern taxonomy are domain, kingdom, phylum (division is sometimes used in botany in place of phylum), class, order, family, genus, and species.
The evidence used by scientists use to classify organisms are essentially form and evolutionary relationships.
Evolutionary relationships.
The diversity of living organisms on earth is very overwhelming. Human beings have come up with ways of organizing, or classifying, biological diversity throughout human history.
Organisms can be classified according to any number of criteria, including overall similarities, colors or ecological factors. It was agreed that the most useful way for scientists to organize biological diversity is to group organisms according to shared evolutionary history or characteristics. Grouping did not only result in an organized classification but it also contains and conveys information about our understanding of the evolutionary history of those groups.
Although our understanding of evolutionary relationships among organisms has greatly improved but it is not complete. Relationships among organisms and groups of organisms continues to be revised as new data becomes available comparing them to the past. Almost all taxonomies or systems of nomenclature based on evolutionary relationships among organisms are being revised.
The use of binomial nomenclature system was proposed by Carl Linnaeus. In this system, the phylogenetic relationship, cladistic analysis, and systematic approaches are used.
Explanation: Hello, i hope this helps. Your so very welcome!
Give the ground state electron configuration for Br. A. [Ar]4s23d104p6 B. [Ar]4s23d104p5 C. [Ar]4s23d104p4 D. [Ar]4s24p6 E. [Ar]4s24d104p6
Answers
The ground state electron configuration of Br is E. [Ar]4s24d104p6. The Br has 35 electrons, and the electron configuration is determined by filling up the orbitals in order of increasing energy. The first 18 electrons fill up the first three energy levels, which are represented by the noble gas configuration of Argon ([Ar]).
The remaining 17 electrons fill up the 4th and 5th energy levels, with the 4s and 4p orbitals filling up before the 5s and 5p orbitals. Therefore, the correct configuration is [Ar]4s24d104p6.
To determine the ground state electron configuration for Br, we can follow the periodic table order. Bromine has an atomic number of 35, which means it has 35 electrons. Starting from hydrogen, we fill the orbitals in the order: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p.
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3. SEP Form a Hypothesis Suggest how the existence of life in the lake that feeds
Blood Falls might inform the search for life outside Earth.
Answers
Hypothesis: If life exists in the lake that feeds Blood Falls, it could provide insights into the potential for life on other planets, particularly in harsh and extreme environments.
The conditions at Blood Falls are extremely challenging for life, with high salinity, low oxygen levels, and sub-zero temperatures. However, despite these harsh conditions, microbial life has been found to thrive in the subglacial lake that feeds the falls.
If similar forms of life are found in other extreme environments, such as deep-sea hydrothermal vents, underground aquifers, or even on other planets or moons, it would provide strong evidence that life can exist in a wide range of conditions. This would greatly expand our understanding of the potential for life beyond Earth and the conditions that could support it.
Furthermore, the study of microbial life in such extreme environments could also help to inform the search for habitable planets or moons in our own solar system and beyond. By understanding the limits of life's tolerance for extreme conditions, we can better identify the most promising targets for future exploration and the search for extraterrestrial life.
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Which process of making a stainless steel product does the photograph
show?
A. Casting
B. Combining
C. Corroding
D. Conditioning
Answers
Answer:
B I have the same test
Explanation:
In the ground state, all of the atoms of Period 3 elements have the same
A) atomic number
B) number of oxidation states
C) number of occupied energy shells
D) atomic mass
Answers
Answer:
C) number of occupied energy shells
Explanation:
Atomic numbers of different elements must differ, as well as atomic masses. The number of oxidation states differs per atom as well.
Mention any two variables of Ideal Gas law
Answers
Answer:
Pressure (P) , Volume (V) , Temperature (T)
Explanation:
An ideal gas has three variables that define its state. They are: absolute pressure (P), volume (V), and absolute temperature (T). The ideal gas law defines how these state variables relate to each other
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a mixture of gaseous hydrogen and nitrogen is considered pure substance Select one: True False
Answers
False. A mixture of gaseous hydrogen and nitrogen cannot be considered a pure substance because it contains two or more different types of particles (hydrogen and nitrogen) which cannot be broken down by physical means into simpler substances of different components.
In chemistry, a pure substance is a type of matter consisting of a single type of particle or matter. It can be broken down into simpler substances, either chemically or physically, but it always contains the same number of atoms or molecules and therefore retains its chemical properties.
Pure substances include elements (such as oxygen, iron, and gold) and compounds (such as water, carbon dioxide, and sodium chloride). Mixtures, on the other hand, are composed of two or more pure substances and can be separated into their components by physical means, such as filtration or distillation.
Therefore, a mixture of gaseous hydrogen and nitrogen is not a pure substance.
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Complete the following table based on Le Chatelier's Principle. (5 points) Effect on equilibrium Change required to return to equilibrium Disturbance Addition of reactant Shift to the right Some of the added reactant must be consumed Addition of product Removal of reactant Decrease in volume (increase in pressure) Increase in temperature Decrease in temperature
Answers
Based on Le Chatelier's Principle, the table can be completed as follows:
Effect on equilibrium Change required to return to equilibrium Disturbance Addition of reactant Shift to the right Some of the added reactant must be consumed Addition of product Shift to the left Some of the added product must be consumed Removal of reactant Shift to the left Some reactant must be replenished Decrease in volume (increase in pressure) Shift to the side with fewer moles of gas Increase in volume (decrease in pressure) Shift to the side with more moles of gas Increase in temperature Shift to the endothermic direction Decrease in temperature Shift to the exothermic direction
Please note that the changes required to return to equilibrium are general guidelines based on Le Chatelier's Principle, but the specific reaction and conditions may influence the extent and nature of these changes.
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If a scientist adds a chemical that specifically inhibits diffusion of protons out of the thylakoid through the ATP synthase complex, the result would be:
Answers
If a scientist adds a chemical that specifically inhibits diffusion of protons out of the thylakoid through the ATP synthase complex, the result would be a decrease in the production of ATP during photosynthesis.
This is because the inhibition of proton diffusion through ATP synthase will disrupt the proton motive force that drives ATP synthesis. As a result, the energy available for the Calvin cycle will be reduced, which can ultimately lead to a decrease in the rate of photosynthesis.
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How do I balance an equation?
Answers
A chemical equation represents the changes that occur during a chemical process. All chemical formulae call for balance.
To balance an equation, one should follow the following points:
1)Take an inventory of the atoms in the reactants and products. Are there the same amounts of each atom on both edges of the arrow? If not, step 2 is necessary because the solution cannot be balanced.
2)In order to increase the number of atoms or molecules in the substances, add coefficients as necessary in front of the symbols or formulas. The smallest coefficients are to be used. Warning! The subscripts in chemical formulations should never be altered. When subscripts are changed, the compounds that are engaged in the reaction alter. Just alter the coefficients.
3)Until the equation is in balanced form, repeat steps 1 and 2.
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What is the source of the thermal energy that heats our planet's
atmosphere?
Answers
The heat source for our planet is the sun. Energy from the sun is transferred through space and through the earth's atmosphere to the earth's surface. Since this energy warms the earth's surface and atmosphere, some of it is or becomes heat energy.
Answer:
the heat source for our planet is the sun. Energy from the sun is transferred through space and through the earth's atmosphere to the earth's surface. Since this energy warms the earth's surface and atmosphere, some of it is or becomes heat energy.
What is the concentration in g/dm3 of a solution of potassium manganate where 5g of potassium manganate is dissolved in 2 dm3 of water?
Please help!!!
Answers
Answer: 2.5 g/dm^3
Explanation: potassium manganate, KMnO4, has a molar mass of 197.1 g/mole. 5 g KMnO4 would be (5g/(197.1 g/mole) = 0.0254 moles K2MnO4.
Calculating moles was a waste of my time, becuse the answer requested is in 6/dm^3. But I'll leave it as a lesson to "always read the full question before answering." [Spoiler alert: I rarely do, and often waste my time].
We add 5g to 2 dm^3 of water. 5g/2dm^3 = 2.5 g/dm^3.
Acids containing polyatomic ions are named according to the name of the anion. true or false
Answers
Answer:
true
Explanation:
Names for such acids consist of the prefix “hydro-“, the first syllable of the anion, and the suffix “-ic”. Complex acid compounds have oxygen in them. For an acid with a polyatomic ion, the suffix “-ate” from the ion is replaced with “-ic.”
The following are n=10 temperature measurements (degrees F.) made every minute on a chemical reactor. 200,202,208,204,204,207,207,204,202,199 Calculate approximate standard errors for r 1
,r 2
,r 3
that is, SE(r 1
),SE(r 2
),SE(r 3
), using the folllowing formulas: 13. SE(r 1
)=1/ n
. (A) 0.200( B)
0.316
(C) 0.400
(D) 0.500
(E)
0.600
14. SE(r 2
)= 1+2r 1
2
/ n
. 2 (A) 0.200( B)
0.316
(C) 0.341
(D) 0.500
(E) 0.600
15. SE(r 3
)= 1+2r 1
2
+2r 2
2
/ n
.
Answers
The approximate standard errors for r1, r2, and r3 are respectivelySE(r1) ≈ 0.316 (option B), SE(r2) ≈ 0.341 (option C), SE(r3) ≈ 0.397
To calculate the approximate standard errors for r1, r2, and r3, we'll use the given formulas:
\(SE(r1) = 1 / sqrt(n)\)
where n = 10 in this case. Substituting the value, we get:
\(SE(r1) = 1 / sqrt(10) ≈ 0.316\)
Therefore, the approximate standard error for r1 is approximately 0.316, which corresponds to option (B).
\(SE(r2) = sqrt((1 + 2r1^2) / n)\)
Using the value of r1 from the previous calculation (r1 ≈ 0.316) and substituting the other values:
\(SE(r2) = sqrt((1 + 2 * 0.316^2) / 10) ≈ 0.341\)
Thus, the approximate standard error for r2 is approximately 0.341, which corresponds to option (C).
\(SE(r3) = sqrt((1 + 2r1^2 + 2r2^2) / n)\)
Using the values of r1 ≈ 0.316 and r2 ≈ 0.341, and substituting the other values:
\(SE(r3) = sqrt((1 + 2 * 0.316^2 + 2 * 0.341^2) / 10) ≈ 0.397\)
Therefore, the approximate standard error for r3 is approximately 0.397.
To summarize:
SE(r1) ≈ 0.316 (option B)
SE(r2) ≈ 0.341 (option C)
SE(r3) ≈ 0.397
These are the approximate standard errors for r1, r2, and r3, respectively.
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Every atom of the __ carbon has six protons
Answers
explain why the troposphere has a larger total mass in the stratosphere even though the stratosphere so much bigger
Answers
Answer:
The troposphere is the lowest layer of Earth's atmosphere, and is also where nearly all weather conditions take place. It contains 75% of the atmosphere's mass and 99% of the total mass of water.
Explanation:
what is a formula for sodium nitrate
Answers
Answer:
NaNO3
Explanation:
sodium= Na
Nitrogen= N
and there's 3 oxygens = O3
Can someone please help me! I really need to do this so I can pass this class it’s the only assignment I haven’t done!!
Answers
Answer:
1. 868.8832g
2. .0053385mol
3.34.87 mol
4. 7049.088 g
Explanation:
I used the molar mass equation M= gram/mol and plugged in the numbers for each equation to figure out the missing part.
how is the flow of radiant energy impacted by tectonic events
Answers
Answer:
Tectonic activity also causes volcanoes to erupt and occurs when plates bombard each other or when they are pulled apart. Once they erupt, they can alter the energy flow of the Earth. ... These particles have a cooling effect on the planet as they reflect the incoming solar radiation.
Explanation:
Answer:
The first person answer is correct
what is a sulfhydryl group, and how does it interact biochemically with heavy metals? how does the interaction affect processes in the body?
Answers
A sulfhydryl group is a functional group (-SH) consisting of a sulfur atom bonded to a hydrogen atom. It can interact with heavy metals through a process called metal-thiolate coordination, and the interaction affect processes in the body through Enzyme Inhibition, and Protein Structure.
A sulfhydryl group, also known as a thiol group, is a functional group (-SH) consisting of a sulfur atom bonded to a hydrogen atom. It is commonly found in amino acids such as cysteine and methionine, as well as in coenzymes and enzymes.
In biochemistry, sulfhydryl groups can interact with heavy metals through a process called metal-thiolate coordination. Heavy metals, such as mercury, lead, cadmium, and arsenic, have a high affinity for sulfhydryl groups. They can bind to the sulfur atom of the thiol group, forming metal-thiolate complexes.
The interaction between sulfhydryl groups and heavy metals can have several effects on biological processes;
Enzyme Inhibition; Heavy metal binding to sulfhydryl groups in enzymes can lead to enzyme inhibition or loss of enzymatic activity. This interference can disrupt essential biochemical pathways and impair cellular functions.
Protein Structure and Function; Sulfhydryl groups play a crucial role in maintaining the structure and function of proteins through disulfide bonds. Heavy metal binding to sulfhydryl groups can disrupt disulfide bond formation or cause protein denaturation, affecting protein folding, stability, and activity.
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Which shows an isomer of the molecule below?
Answers
Answer: C
Explanation:
Don’t trust the other person it’s not A
*view photo for answer*
pay attention! the answer choices aren't always in the same order!
if an electron is in a stationary state of an atom, is the electron at rest? if not, what does the term mean?
Answers
No, a stationary state is one that has a specific amount of energy, total angular momentum, and parity; in a stable state, the particle is moving while possessing all of these physical characteristics.
Who or what is an electron?A negative charge subatomic particle known as an electron can either be free or attached to an atom (not bound). Each of the three main types of components within an atom is an atom that is bonded to it; the other three are proton and neutrons.
What is the electron example?The electron, the smallest constituent part of an atom, has a negative surface charge. Protons and electrons are present in an atom in a neutral state in an equal number. The hydrogen ion only possesses one atom or one proton. On the other way, the uranium atom possesses 92 protons, which means 92 electrons.
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