Is "a stitch in time saves nine" qualitative or quantitative?
Chlorine released from chlorofluorocarbons (cfcs) reacts with ozone in the atmosphere to form oxygen. the proposed reactions are cl(g)+o3(g)→clo(g)+o2(g) clo(g)+o(g)→cl(g)+o2(g) identify the species that acts as a catalyst and the one that acts as an intermediate in these reactions.
In the two-step reaction involving chlorine, ozone, and oxygen, chlorine acts as the catalyst because it helps speed up the reaction and is not used up in the process. Chlorine monoxide acts as the intermediate since it is formed in one step and then consumed in a following step.
Explanation:In the given reactions, the species that functions as a catalyst is the chlorine atom (Cl). The reason it is a catalyst is because it is not consumed in the overall reaction; it speeds up the process by reacting with ozone to form ClO which then reacts with another oxygen atom to reform Cl and thus is available for further reaction.
On the other hand, the species that acts as an intermediate is Chlorine monoxide (ClO). An intermediate is a species which is produced in one step of a reaction and consumed in a later step, and thus does not appear in the overall equation. In this case, ClO is formed in the first reaction and then reacts in the second step to produce Cl and O2 thereby not appearing in the overall reaction.
These reactions are particularly significant in the study of the depletion of the ozone layer in the stratosphere. This often occurs due to the breakdown of chlorofluorocarbons (CFCs) which release chlorine atoms that can catalyze the destruction of ozone.
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Which three groups of the periodic table contain the most elements classified as metalloids (semimetals)?
Answer:
germanium
Explanation:
EDGE 2021
Second one on that question is
promethium
Compared with the freezing-point of a salt water solution, the freezing-point of water is
If there were only three electron groups around an atom, how would they be arranged?
What organic compound is phosphorus found in?
Final answer:
Phosphorus is found in biological organic chemistry in the form of phosphate groups, including in essential molecules such as DNA and ATP, and as part of organophosphates like methyl phosphate.
Explanation:
Phosphorus is found in many organic compounds as part of phosphate groups. In terms of biological organic chemistry, phosphorus is vital as the central atom in the phosphate group, which is involved in various structures such as phosphates, diphosphates, and triphosphates. These phosphate groups are linked to a carbon atom by phosphate ester functionality, forming the backbone of essential biological molecules like DNA and ATP.
Organophosphates, for instance, are a category of compounds that contain a phosphorus atom bonded to four oxygens, one of which is also bonded to a carbon. An example of this is methyl phosphate, where the phosphorus is sp³ hybridized. Derivatives of phosphoric acid, such as phosphate esters and diesters, are also important in biochemistry, being present in nucleic acids, proteins, and membrane lipids.
Three isotopes of sulfur are sulfur-32, sulfur-33, and sulfur-34. write the complete symbol for each isotope, including the atomic number and the mass number.
Answer: The three isotopes of sulfur are [tex]_{16}^{32}\textrm{S},_{16}^{33}\textrm{S}\text{ and }_{16}^{34}\textrm{S}[/tex]
Explanation:
Isotopes are defined as the substances which have same number of protons ( or Atomic number) but different number of neutrons (or Atomic mass). It is written in the form of [tex]_Z^A\textrm{X}[/tex]
where,
Z is the atomic number
A is the atomic mass
X is the symbol of the element
Sulfur is the 16th element in the periodic table with atomic number 16.
For isotope 1: The atomic mass is 32
For isotope 2: The atomic mass is 33
For isotope 3: The atomic mass is 34
Therefore, the three isotopes of sulfur are [tex]_{16}^{32}\textrm{S},_{16}^{33}\textrm{S}\text{ and }_{16}^{34}\textrm{S}[/tex]
Silver nitrate, agno3, reacts with iron(iii) chloride, fecl3, to give silver chloride, agcl, and iron(iii) nitrate, fe(no3)3. a solution containing 18.00 g of agno3 was mixed with a solution containing 32.40 g of fecl3. how many excess grams of the excess reactant remain after the reaction is over?
To determine the excess reactant after a reaction between silver nitrate and iron(III) chloride, calculate the moles of each reactant, identify the limiting reactant, and then calculate the remaining mass of the excess reactant using stoichiometry.
Explanation:The subject of the question is stoichiometry, which is a section of chemistry that involves the calculation of the quantities of reactants and products in chemical reactions. Specifically, the question asks to determine the excess grams of reactant remaining after a reaction between silver nitrate (AgNO3) and iron(III) chloride (FeCl3) has taken place.
To find the answer, we would calculate the moles of both reactants using their given masses and molar masses. Then, using the balanced chemical equation, we could determine the limiting reactant and the amount of excess reactant. From there, we can calculate the mass of the excess reactant remaining.
Electrolysis breaks down water to form hydrogen and oxygen gas. The word equation that represents this reaction is
what chemical substances do electrolytes belong to
What is the job of a scientist
Answer: to ask and answer scientific questions
Describe how clastic sedimentary rock differs from chemical and organic sedimentary rock
Clastic sedimentary rocks form from the deposition of eroded particles of rock. Chemical or non-clastic sedimentary rocks form through chemical precipitation. Organic deposits are products of biological activity and the remains are deposited and consolidated into rock.
A gold atom has a radius of 145 pm. If you could string gold atoms like beads on a thread, how many atoms would you need to have a necklace 36 cm long?
To make a necklace 36 cm long, you would need approximately 1241 gold atoms.
Explanation:To determine the number of gold atoms needed to make a necklace of a certain length, we need to calculate the number of gold atoms that can fit along the length of the necklace. The radius of a gold atom is given as 145 pm. To convert the length of the necklace to picometers (pm), we multiply 36 cm by 10,000 to get 360,000 pm.
Dividing the length of the necklace by the diameter of a gold atom, which is twice the radius, we get the number of gold atoms needed.
Number of gold atoms = Necklace length / (2 * Radius) = 360,000 pm / (2 * 145 pm) = 1241 atoms. Therefore, you would need approximately 1241 gold atoms to make a necklace 36 cm long.
Inductive reasoning requires _____.
A: creative thought
B: a computer
C: algorithms
D: bias
Inductive reasoning requires creative thinking.
Atoms in a liquid have _________ energy than atoms in a solid, so the easiest way to change a solid to a liquid is to add _________. when changing from a solid to a liquid, there is a magic temperature for every substance called the ________________________________________.
Liquid atoms are more energetic than those in a solid. The melting point of each substance is a specified temperature. When anything gets hot enough to melt it, a solid can change into a liquid.
What does melting point mean?The melting point of a pure substance is the temperature at which its solid and liquid states can coexist in equilibrium.
In the liquid state, atoms or molecules have enough kinetic energy to travel independently of one another and the chemical bonds connecting them to the crystal lattice, but not enough energy to completely split from other atoms.
Atoms in a liquid have more energy than those in a solid. Each substance has a specific temperature at which it will melt. A solid can turn into a liquid when anything becomes hot enough to melt it.
Therefore, liquid are more energetic in liquids than in solids.
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1) This element has more than 50 but less than 75 protons and it is in Group 17.
2)This element has more electrons than oxygen but fewer electrons than neon.
3)This element has an atomic number lower than that of aluminun but an atomic mass that is greater than sodium.
4)This Group 2 element has fewer protons than bromine but more protons than sulfur.
5)This element has an atomic number that is one greater than platinum.
A chemical element, popularly known as an element, is any substance that can be broken into simple molecules by ordinary chemical reactions, further calculation can be defined as follows:
This element belongs to Group 17 IODINE and contains more than 50 but less than 75 protons (I).The element contains more electrons than oxygen yet fewer electrons as neon FLUORINE (F).The element has a lower atomic number than aluminum yet a higher atomic weight than sodium MAGNESIUM (Mg).The Group 2 element contains fewer protons than bromine but much more protons as sulfur CALCIUM (Ca).Each element does have an atomic number one higher than platinum GOLD/AURUM (Au).Therefore, the final answer is "Iodine, Fluorine, Magnesium, Calcium, and Gold".
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(only for correct answers)
For EACH of the following reactions, identify ALL OF THESE:
a. oxidized species b. reduced species c. oxidizing agent d. reducing agent
I) 2 Fe (s) + 3 Cl2 (g) --> 2 FeCl3(s)
II) Mg (s) +2 H2SO4 (aq) --> MgSO4 (aq) + SO2 (g) + 2 H2O (l)
III) 2 Mg (s) + O2 (g) --> 2 MgO (s)
Final answer:
In the given reactions, the oxidized species, reduced species, oxidizing agent, and reducing agent are identified for each reaction.
Explanation:
In the given reactions:
I) 2 Fe (s) + 3 Cl2 (g) → 2 FeCl3(s)
Oxidized species: Fe (s)
Reduced species: Cl2 (g)
Oxidizing agent: Cl2 (g)
Reducing agent: Fe (s)
II) Mg (s) +2 H2SO4 (aq) → MgSO4 (aq) + SO2 (g) + 2 H2O (l)
Oxidized species: Mg (s)
Reduced species: H2SO4 (aq)
Oxidizing agent: H2SO4 (aq)
Reducing agent: Mg (s)
III) 2 Mg (s) + O2 (g) → 2 MgO (s)
Oxidized species: Mg (s)
Reduced species: O2 (g)
Oxidizing agent: O2 (g)
Reducing agent: Mg (s)
How do you write a college psychology APA format abstract?????? Please help me, I procrastinated this essay and I'm really stressed.
(Do not label as “Introduction.” Title of paper goes at the top of the page—not bold)
The introduction of an APA-style paper is the most difficult to write. A good introduction will summarize, integrate, and critically evaluate the empirical knowledge in the relevant area(s) in a way that sets the stage for your study and why you conducted it. The introduction starts out broad (but not too broad!) and gets more focused toward the end. Here are some guidelines for constructing a good introduction:
Don’t put your readers to sleep by beginning your paper with the time-worn sentence, Past research has shown....(blah blah blah) They’ll be snoring within a paragraph! Try to draw your reader in by saying something interesting or thought-provoking right off the bat. Take a look at articles you’ve read. Which ones captured your attention right away? How did the authors accomplish this task? Which ones didn’t? Why not? See if you can use articles you liked as a model. One way to begin (but not the only way) is to provide an example or anecdote illustrative of your topic area.Although you won’t go into the details of your study and hypotheses until the end of the intro, you should foreshadow your study a bit at the end of the first paragraph by stating your purpose briefly, to give your reader a schema for all the information you will present next.Your intro should be a logical flow of ideas that lead up to your hypothesis. Try to organize it in terms of the ideas rather than who did what when. In other words, your intro shouldn’t read like a story of “Shirley did such-and-such in 1991. Then Gangelhoff did something-or-other in 1993. Then....(etc.)” First, brainstorm all of the ideas you think are necessary to include in your paper. Next, decide which ideas make sense to present first, second, third, and so forth, and think about how you want to transition between ideas. When an idea is complex, don’t be afraid to use a real-life example to clarify it for your reader. The introduction will end with a brief overview of your study and, finally, your specific hypotheses. The hypotheses should flow logically out of everything that’s been presented, so that the reader has the sense of, “Of course. This hypothesis makes complete sense, given all the other research that was presented.”When incorporating references into your intro, you do not necessarily need to describe every single study in complete detail, particularly if different studies use similar methodologies. Certainly, you want to summarize briefly key articles, though, and point out differences in methods or findings of relevant studies when necessary. Don’t make one mistake typical of a novice APA-paper writer by stating overtly why you’re including a particular article (e.g., “This article is relevant to my study because…”). It should be obvious to the reader why you’re including a reference without your explicitly saying so. DO NOT quote from the articles, instead paraphrase by putting the information in your own words.Be careful about citing your sources (see APA manual). Make sure there is a one-to-one correspondence between the articles you’ve cited in your intro and the articles listed in your reference section.Remember that your audience is the broader scientific community, not the other students in your class or your professor. Therefore, you should assume they have a basic understanding of psychology, but you need to provide them with the complete information necessary for them to understand the research you are presenting.METHOD An APA-style paper includes the following sections: title page, abstract, introduction, method, results, discussion, and references. Your paper may also include one or more tables and/or figures.How an atom reacts chemically depends on how willing it is to share?
How an atom reacts chemically depends on how willing it is to share: electrons with other chemical elements.
An atom refers to the smallest, indivisible unit made up of matter and forms all chemical elements.
Hence, atoms are the fundamental building blocks of matter and they determine the structure of all chemical elements.
In Chemistry, an atom is made up of three (3) distinct subatomic particles and these include;
Protons.Neutrons.Electrons.Chemical reactivity determines how readily a chemical element bonds with other chemical elements by sharing its electrons with them.
As a general rule, how an atom reacts chemically is highly (largely) dependent on the number of valence electrons in the outermost shell of its atom.
In conclusion, the willingness of an atom to share electrons determines how it reacts chemically with others.
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What process does the image show?
Every substance melts at 0 degrees Celsius and boils at 100 degrees Celsius.
True
False
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A sample of marble has a volume of 6 cm3 and a density of 2.76 g/cm3. What is its mass?
A. 16.56 g
B. 8.76 g
C. 2.17 g
D. 0.46 g
How many milliliters of a stock solution of 17.0 m hno3 would you have to use to prepare 0.500 l of 0.200 m hno3? ml?
A single electron has a charge of 4.5×10−15 z . using zeets and a fictitious unit of mass called the wiggle, w, the charge-to-mass ratio of an electron is 5.4×106 z/w . what is the mass of an electron in wiggles?
Using the charge-to-mass ratio and the given charge of an electron, the mass of an electron is calculated to be approximately 8.333×10−21 wiggles.
Explanation:To calculate the mass of an electron in wiggles (w), given that a single electron has a charge of 4.5×10−15 z and the charge-to-mass ratio of an electron is 5.4×106 z/w, we can use the formula:
Charge-to-mass ratio = Charge/Mass
Plugging in the values we have:
5.4×106 z/w = 4.5×10−15 z / Mass in wiggles
To find the mass in wiggles, we rearrange the formula to solve for mass:
Mass in wiggles = Charge / Charge-to-mass ratio
Mass in wiggles = 4.5×10−15 z / 5.4×106 z/w
Mass in wiggles = 8.333×10−21 w
Therefore, the mass of an electron is approximately 8.333×10−21 wiggles.
The mass of an electron, given a charge of 4.5×10⁻¹⁵ z and a charge-to-mass ratio of 5.4×10⁶ z/w, is approximately 0.8333 × 10⁻²¹ wiggles.
Let's solve for the mass of the electron:
The charge of the electron, q, is 4.5×10⁻¹⁵ z.The charge-to-mass ratio (q/m) is 5.4×10⁶ z/w.We need to find the mass (m), so we rearrange the formula: q/m = 5.4×10⁶ z/wSolving for m, we get: m = q / (q/m) = (4.5 × 10⁻¹⁵ z) / (5.4 × 10⁶ z/w)Simplifying, m = (4.5/5.4) × 10⁻²¹ w ≈ 0.8333 × 10⁻²¹ wThus, the mass of the electron is approximately 0.8333 × 10⁻²¹ wiggles.
Which statement describes a limitation of the kinetic-molecular theory for a gas?
The theory assumes that particles do not experience intermolecular forces.
The theory states that pressure is inversely proportional to volume.
The theory assumes that particles are in random and continuous motion.
The theory states that pressure increases with temperature.
Answer:
particles don't experience intermolecular forces
Explanation:
Which element on the periodic table has chemical properties that are most similar to carbon?
The element which has most similar chemical properties to carbon is silicon.
What are chemical properties?These properties are defined as those properties which become evident during or after a chemical reaction after the identity of the substance is changed during chemical reaction.
These properties cannot be determined externally just by viewing the substance ,these change immensely after a substance undergoes a chemical change.These are used for identification of unknown substances and for building up chemical classifications.
The major chemical properties are flammability,toxicity,reactivity,acidity and heat of combustion.For a chemical property to be apparent , it is necessary that the structure of the substance is altered.Chemical properties are almost similar for elements in a group.
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Scientists noticed that the ozone layer was thinning. What was occurring at the same time?
Recall the formula of glucose is c 6 h 12 o 6 . how many carbon, oxygen, and hydrogen atoms will you need for three glucose molecules
Three glucose molecules would require 18 carbon atoms, 36 hydrogen atoms, and 18 oxygen atoms.
Explanation:The formula for glucose is C6H12O6, which means each molecule of glucose is made up of 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms. Thus, for three glucose molecules, you would need 3 times the amount of each type of atom. So, you would need 18 carbon atoms, 36 hydrogen atoms, and 18 oxygen atoms.
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What types of molecules dissolve easily in water?
"Polar molecules" can be dissolved easily in water. A further explanation is provided below.
The neutrality, as well as unconvinced polar molecule, really does have an asymmetrical inner charge distribution which then leads to largely positive (+) as well as partially negative (-) areas. All of these are dissolved by rainwater, stone, pots, pan, sugar, salt as well as coffee grounds. Dissolving matters are termed formation of soluble as well as the fluid particles disintegrate is referred to as a solvent.
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If an object has a mass of 3.00 g and a density of 0.023 g/ml, what is its volume?
Final answer:
The volume of the object is 130.43 ml.
Explanation:
The volume of an object can be calculated by dividing its mass by its density. In this case, the mass of the object is 3.00 g and the density is 0.023 g/ml. To find the volume, we can use the formula:
Volume = Mass / Density
Substituting the given values, we have:
Volume = 3.00 g / 0.023 g/ml = 130.43 ml