When the dry ingredients of a cake are combined, the result is a mixture. Option 3.
What are mixtures?In chemistry, mixtures are substances that are obtained by mixing two or more chemically different substances together with each substance maintaining its chemical identity. In other words, the components of a mixture are still chemically unique and can be separated by physical means.
Mixtures can be homogeneous or heterogeneous. Homogenous mixtures are mixtures in which the components are uniformly dispersed throughout the entire mixture. For heterogeneous mixtures, the components are not uniform throughout the mixture.
Thus, when the dry ingredients of a cake, such as flour, sugar, etc., are combined, what we are going to have is a mixture. Whether this mixture would be homogenous or heterogeneous will depend on the level of mixing. Whatever the case may be, the components can still be separated by physical means.
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The chemical formula for barium oxide is BaO.
A chemist determined by measurements that 0.085 moles of barium oxide participate in a chemical reaction. Calculate the
mass of barium oxide that participates.
Round your answer to 2 significant digits.
Answer: 9.97 g (corrected to 3 significant figures.)
Explanation:
mass = no. of moles x molar mass
Atomic mass of Barium = 137.327; oxygen = 15.999,
so the molar mass of BaO = 137.327 + 15.999
=153.326
Hence, the mass is
0.065 x 153.326
=9.97 g (corrected to 3 significant figures.)
8) Is there more gravitational force on the earth or moon? Why?
Answer:
Explanation:
So, to begin answering your question, Earth has a greater gravitational pull than the moon simply because the Earth is more massive. The moon's gravitational pull also affects Earth, though; the rising and falling of the tides are an effect of the moon's gravity. HOPE THIS HELPS ^^
Orange light has a frequency of 4.8×1014 s−1. What is the energy of one quantum of orange light?
The energy of one quantum of orange light, given that it has a frequency of 4.8×10¹⁴ s⁻¹ is 3.18×10⁻¹⁹ J
How do I determine the energy?We know that energy and frequency are related according to the following equation:
Energy (E) = Planck's constant (h) × frequency (f)
E = hf
Using the above formula, we can obtain the energy of one quantum of the orange light. Details below:
Frequency (f) = 4.8×10¹⁴ s⁻¹Planck's constant (h) = 6.626×10⁻³⁴ JsEnergy (E) = 6.23×10⁻¹⁹ JEnergy (E) = Planck's constant (h) × frequency (f)
E = hf
E = 6.626×10⁻³⁴ × 4.8×10¹⁴
E = 3.18×10⁻¹⁹ J
Thus, the energy is 3.18×10⁻¹⁹ J
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a lewis structure for the acetate ion is shown here: the ion is ch3co with an o atom double-bonded to the second (from left to right) carbon. the double-bonded o atom has two lone pairs. the other o atom has three lone pairs. the overall charge of the ion is 1 minus. which structure is the best resonance structure for the acetate ion?
A lewis structure for the acetate ion is included the carbon hydrogen and the oxygen atom . the one oxygen atom is doubly bonded with the carbon atom and one is single bonded with negative charge.
The acetate ion included the carbon hydrogen and the oxygen atom . the lewis structure of acetate ion is one O atom double-bonded to the carbon. the double-bonded O atom has two lone pairs. the other O atom has three lone pairs and -1 negative charge.
The valence electron of the C atom = 8
The valence electron of the H atom = 3
The valence electron of the O atom = 12
The total number of the valence electrons of the CH₃CO⁻ is = 24
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If an atom, such as hydrogen, is able to form a covalent bond, describe what happens when the
electron shells of two atoms overlap?
The electrons in the shells would experience a decrease in energy.
What is the electron shell?We know that the electron shell in the outermost part of the atom is the shell that gets involved in the bonding of the atom. When the bonding takes place, there could be the sharing of electrons as in the covalent bond or the transfer of electrons as in the ionic bond.
In this case, we are dealing with the covalent bond hence there is the sharing of electrons and the shells that would be involved in this is the outermost shells.
By virtue of the sharing of the electrons and the combination of the shells, the energy of the outermost shell would become reduced as the electrons are now attracted to two nuclei rather than one of the hydrogen atoms in the compound.
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Need answers to this
Explanation:
1. h. (binary means 2 things in the system).
2. f.
3. e.
4. b.
5. c (ternary means 3 things in the system)
6. d.
7. a.
8. g ("poly" means several or many)
Which two bonds are least similar in polarity?
Select one:
a. I-Br and SiCl
b. B-F and Cl-F
c. C-Cl and Ge-Cl
d. O-F and Cl-F
e. Ga-Cl and I-Br
Answer:
Explanation:
hooki
Light passing through a transparent medium has a wavelength of 466 nm and a frequency of 6.20 × 1014 s-1. What is the speed of the light in the medium?
Speed =frequency × wavelength
=466 x 6.20 x [tex]10^{14}[/tex]
=2.8892 x [tex]10^{17}[/tex] m/s
What is the speed of light?
The rate at which light waves go through various materials at the speed of light. Specifically, the speed of light in a vacuum is presently calculated to be 299,792,458 metres per second.
One of nature's basic constants is the speed of light. Its importance extends far beyond its use in characterizing an aspect of electromagnetic waves. It acts as the universe's only limiting velocity, setting an upper limit on both the speed of all material particles and the speed at which signals can travel. The speed of light (c) acts as a constant of proportionality in the well-known relativity equation, E = mc2, connecting the heretofore dissimilar ideas of mass (m) and energy (E).
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3. Which hereditary disease results in difficulties with breathing and with digesting food?
muscular dystrophy
hemophilia
O
Down syndrome
cystic fibrosis
Answer:
cystic fibrosis
Explanation:
The cells that make mucus, perspiration, and digestive fluids are impacted by cystic fibrosis. These fluids start to thicken and cling together as a result. They then block off all of the tubes, ducts, and passages.
A 75 mL sample of He gas is at 97°C and 0.975 atm. If the sample is cooled to 29°C and the pressure is increased to 1.25 atm, what will the new volume be?
2194.14is the new volume .These laws are described by equations that are variations on the ideal gas law, PV is nRT
How would you determine the volume, temperature, pressure, and amount of gas in a sample under the circumstances?These laws are described by equations that are variations on the ideal gas law, PV = nRT, where P is the gas's pressure, V is its volume, n is the number of moles in the gas, T is its kelvin temperature, and R is the ideal (universal) gas constant.The ideal gas law, PV = nRT, should be reviewed first. P is the ideal gas constant, V the volume in liters, n the number of particles in moles, T the temperature in Kelvin, and n the number of atmospheres in this equation (0.0821 liter atmospheres per moles Kelvin).These laws are described by equations that are variations on the ideal gas law, PV = nRT, where P is the gas's pressure, V is its volume, n is the number of moles in the gas, T is its kelvin temperature, and R is the ideal (universal) gas constant.Explanation:
The ideal gas law, PV = nRT,
97 * 0.975*29 = 2742.675/1.25 = 2194.14.
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Classify the components as most accurately describing cofactors, coenzymes, or neither. Cofactors Coenzymes Neither ascorbic acid
Ascorbic acid can be defined as an electron donor and therefore it functions as a cofactor for diverse chemical reactions.
What is a cofactor of diverse chemical reactions?A cofactor of diverse chemical reactions can be defined as a non protein compound that is required for the enzyme, i.e., by the protein, in order ti can function normally such as occurs with ascorbic acid for many diverse chemical reactions that involve metabolic pathways in mammalian cells.
The cofactors are molecules that provide the required for the enzyme to function such as an electron donor required to the forming of the enzyme-substrate complex during anabolic pathways.
Therefore, with this data, we can see that a cofactor of diverse chemical reactions is able to provide the enzymes the help in order to carry out chemical reactions such as the conversion of one substrate to a product.
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Water is essential for life and is important for plant growth and function. which property of water is most responsible for its ability to move from the root of a plant to the stem?
This connection produces a characteristic of water molecules called cohesion, which is important. Plants can absorb water at their roots thanks to the cohesion of water molecules.
Cohesion refers to the attraction of water molecules to one another and to other materials, such as the walls of plant xylem. Because they are polar, water molecules behave in this manner. Water from the roots of plants is transferred to the leaves, stem, and other portions of the plant body through vascular tissue known as the xylem. The roots of plants absorb this type of moisture and water from the earth. It has a polar nature. It is a universal solvent. It has a high specific heat as well as a high vaporization temperature. It has properties of adhesion and cohesion. Its solid phase is thinner than its liquid phase.
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va compound is found to be made of 82.659% carbon and 17.341% hydrogen. which choice is the empirical formula for this compound?
C) C2H5 , Butane is a hydrocarbon, or a substance made exclusively of hydrogen and carbon, that is used as LPG and lighter fluid. Its mass composition is 82.66% carbon and 17.34% hydrogen.
Utilized as LPG and lighter fluid, it has a bulk composition of 82.66% carbon and 17.34% hydrogen. Use the 100.0 g sample provided below to complete the exercise and get the empirical formula (a substance's empirical formula indicates the relative quantities of its carbon atoms). C2H5 is the empirical formula for the given values.
The complete question is:
A compound is found to be made of 82.659% carbon and 17.341% hydrogen. which choice is the empirical formula for this compound?
A) C4H10
B) CH
C) C2H5
D) CH2.50
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Which characteristic does inertia describe? responses how long an object is how long an object is how large an object is how large an object is how fast an object is moving how fast an object is moving how difficult it is to change an object's motion
Option C, Inertia describes how difficult it is to change the motion of an object.
What is meant by Inertia?The Latin term inerus, which meaning inert or slow, is where the word inertia originates. It may also refer to an object's resistance to a change in velocity.An object is said to have inertia if no external force forces it to change its speed or direction from its current state. Newton's first law of motion included a description of the concept of inertia. It is a propensity to do nothing or to do nothing different.Unless acted upon by an unbalanced force, an object remains at rest and an object in motion will remain to move at a constant speed and in a straight line. This is known as Newton's first law of motion (inertia).Learn more about Inertia refer to :
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Compare and contrast sigma and pi bonds, including their shape and properties.
Sigma bonds are known to have cylindrical charge symmetry around the axis of the bond. No symmetry exists in pi bonds. Atoms with sigma bonds are less reactive. Atoms with pi bonds are highly reactive when compared to those with only sigma bonds.
What is mechanical advantage? A. output work divided by input work. B. Input work divided by output work. C. Input force divided by output force. D. Output force divided by input force. please help!! If you answer correctly i'll give you 5 stars!!
Output force divided by input force is the mechanical advantage.
Why is it referred to as mechanical advantage?A tool, mechanical device, or machine system's ability to amplify force is known as its mechanical advantage. The system simply balances forces against movement in order to achieve the desired output force amplification while maintaining the input power. The law of the lever can be used as an example for this.
Levers and pulleys are examples of simple machines that use mechanical advantage, a measurement of the ratio of output force to input force in a system.
A calculation known as a mechanical advantage quantifies the amplified force that a mechanical system absorbs. It provides the ratio of force applied to the load to force required to overcome that force. Since the two ratio quantities are the force, the expression has no units.
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What element could react with nitrite to form an ionic bond?
Ionic molecules known as salts of nitrous acid include the nitrite ion, NO-2, and a positive ion, such Na+ in sodium nitrite (NaNO2)
What does possessing nitrites in your urine mean?So, if your urine contains nitrites, you probably have an urinary tract infection. (UTI). One of the most prevalent types of illnesses, particularly among women, is the UTI. Most UTIs damage the urethra and bladder (the tube that carries urine out of your body). Luckily, the majority of UTIs are not dangerous.
How can nitrites in urine be eliminated?Just when you have an urinary infection do you get nitrates in your urine, or nitrituria (UTI). Nitrites are found in the urine during urinalysis. UTI-causing bacteria are eradicated by antibiotics.
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CAN ANYONE TELL THE ANSWER
When water falls from great heights, its potential energy transforms to kinetic energy and this energy is converted electrical energy by power generators which produce a heat energy also. Thus, option b is correct.
What is energy transformation?One form of energy can be transformed to the other form naturally or mechanically. When a body is at rest, it possess potential energy. When it starts to move potential energy convert to kinetic energy.
When water falls from great heights it acquires more kinetic energy and it can be converted to electrical energy using turbines where some energy is lost as heat energy.
Therefore, the heat energy produced by the mechanical work of the turbine make the water heated. Hence, option b is correct.
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Ren runs a hamburger stand and needs to clean up a season’s worth of grease buildup on the range hood over his griddle. Explain what he should look for in a cleaning product that can handle a layer of grease. what is this
To clean away a season's worth of grease buildup, Ren, who owns a hamburger business, would need to use those caustic chemicals, which are the type of cleaning product to look for.
Explain use of caustic chemicals.
One of caustic chemicals' primary applications is cleaning drain pipes. It can also be used to create soap and detergents, unclog drains, and remove grease buildup from ovens. Given all of its functions, it is a useful item to have about the house. Chlorine bleach is made by mixing sodium hydroxide with chlorine in a manufacturing process.
To dissolve the grease, these caustic chemicals might be used. Hot water can be used to rinse the grease once it has been broken down. To soften the grease buildup, these chemicals should be given time to sit on the grease's surface.
Ren ought to make use of a base-containing cleaning solution. This is because lipids, the type of chemical that makes up grease, react well with bases. Using a base, the grease would be broken down to create soap, which would then
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which salt dissolves in water to form an acidic solution ammonium nitrate sodium ethanoate potassium chloride sodium hydrogen carbonate
According to the information provided, ammonium chloride salt produces an acidic solution when dissolved in water.
What is the purpose of ammonium nitrate in farming?Ammonium nitrate is used by animal farmers for fertilising pasture and hay since urea-based fertilisers have a tendency to volatilize first from soil before the plants can utilise them. Additionally, it is very soluble, making it a good choice for irrigation systems.
Is ammonium nitrate harmful to humans?Ammonium nitrate is safe to handle under typical circumstances. However, breathing in large amounts or ammonium nitrate powder might irritate the respiratory system. Coughing, sore throats, breathing difficulties, and even suffocation are examples of symptoms.
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write a paragraph using the words atom, element, compound, and mixture.
Victor put a match on a balance and found that its mass was 6.0 grams. Then he lit the match and put it out after a few seconds.
He put the partially burned match on the balance again. This time, its mass was 4.5 grams.
Which of the following best explains what happened as the match burned?
A.
Some of the matter changed from solid to gas and went into the air.
B.
The matter moved to a different part of the match.
C.
Some of the mass was destroyed by the fire.
D.
The mass of the match combined with the mass of the fire.
Place the cursor at the start of the text, then press CTRL+SHIFT+DOWN ARROW. Press CTRL+SHIFT+UP ARROW after advancing the cursor to the end of the paragraph. The Correct option is B.
How do you move the first sentence to the end of the paragraph in Word?The Ctrl+A keyboard shortcut in Word allows you to select all text in a document, and you can also use the mouse or keyboard to pick out individual words or objects from tables. Text or objects that are located in various locations can also be chosen. You can choose, for instance, a sentence from one page and a paragraph from another.The entire textIn the document, click anywhere.You can pick every word in the document by pressing Ctrl+A on your computer.The particular wording you wantAdditionally, you have the option of choosing a specific word, line of text, or one or more paragraphs.Your cursor should be placed in front of the first letter of the word, sentence, or paragraph you want to pick.To pick a text block, click and hold while dragging the cursor over it.Other options for selecting textQuickly click and drag the mouse over a word to choose it.By positioning your cursor at the beginning of a line of text and pressing Shift + down arrow, you can pick that line of text.Put your cursor at the beginning of the paragraph, then hit the down arrow while holding down the Ctrl and Shift keys to select the paragraph.To Learn more About end of the paragraph refer to:
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which set of elements is arranged in order of increasing electronegativity? which set of elements is arranged in order of increasing electronegativity? ga < ge < p < n p < n < ge < ga ge < n < ga < p n < p < ge < ga
The electronegativity is n < p < ge < ga.
What is electronegativity?Electronegativity is a measure of an atom's ability to attract electrons when it forms a chemical bond with another atom. It is based on the Pauling Scale, which assigns values to elements based on their tendency to attract electrons when they form bonds. Electronegativity increases from left to right across the periodic table, and increases from the bottom to the top of the periodic table.
The correct answer is n < p < ge < ga. This is because electronegativity increases as we move down a group in the periodic table and from left to right across a period.
Therefore, the element with the highest electronegativity is at the bottom right corner of the periodic table, which is gaseous, followed by Germanium, Phosphorus, and then Nitrogen.
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potassium dichromate, k2cr2o7, is used in tanning leather, decorating porcelain, and water proofing fabrics. calculate the number of chromium atoms in 78.82 g of k2cr2o7..
The number of chromium atoms present in 78.82 g of potassium dichromate are 2.98×[tex]10^{23}[/tex]
Molecular mass is the molar mass, or M, is a physical characteristic in chemistry that is defined as the mass of a particular substance divided by the quantity of that material. For molar mass, the fundamental SI unit is kg/mol. One mole is a collection of 6.022 ×10²³ particles, be the atoms, molecules, ions , electrons, photons or any other things. This value of 6.022 ×10²³ is the Avogadro's number.
1 mole [tex]K_{2}Cr_{2}O_{7}[/tex] = 294.18 g [tex]K_{2}Cr_{2}O_{7}[/tex] contains 2 moles Cr = 2×6.023 × [tex]10^{23}[/tex]Cr atoms.
So, 72.8g [tex]K_{2}Cr_{2}O_{7}[/tex] contains (72.84/294.18)×2×6.023×[tex]10^{23}[/tex] Cr atoms
= 2.98 × [tex]10^{23}[/tex]
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consider a solution containing 0.100 m naf and 0.126 m hf. calculate the concentration of fluoride ion after addition of 5.00 ml of 0.100 m hcl to 25.0 ml of this solution.
The Concentration of a Fluoride ion is [tex]0.0667 M[/tex]
The Hf and Fluoride ion makes a buffer system which can be written as :
[tex]HF\Longleftrightarrow H^{+} +F^{-}[/tex]
[tex]K_{a} =[H^{+}][/tex] X [tex]\frac{[F^{-} ]}{[HF]}[/tex]
both the buffer components are in the same final volume so we can simplify the equation as :
[tex]K_{a}=[H]^{+} \times \frac{[n_{F^{-} }] }{[HF]}[/tex]
before the reaction :
moles of hcl = v x c = (0.00500)L x (0.100)M=[tex]0.000500mol[/tex]moles of hf = v x c=(0.0250)L x (0.126)M=[tex]0.00315mol[/tex]moles of fluoride ion = v x c= (0.0250)L x (0.100)M=[tex]0.00250mol[/tex]hcl will react with fluoride to produce more hf:
after reaction:
moles of hf= [tex]0.00315 +0.000500[/tex]=[tex]0.00365mol[/tex]moles of fluoride = [tex]0.00250-0.000500[/tex]=[tex]0.00200mol[/tex]final volume = [tex]0.0250+0.005[/tex]=[tex]0.0300L[/tex]molarity of fluoride = = [tex]\frac{0.00200mol}{0.0300L}[/tex]= [tex]0.0667M[/tex]learn more concentration problems.
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How many moles exist in 3,000,000 particles of gold (Au)?
Answer:
4.98 x 10^-18 mole
Explanation:
1 mole has 6.022 x 10^23 particles
so 3,000,000/(6.022 x 10^23) = 4.98 x 10^-18 mole
assume there exists some hypothetical metal that exhibits ferromagnetic behavior and that has 1 simple cubic crystal structure, and atomic radius of 0.130 nm and a saturation flux density of 0.75 tesla. determine the number of bohr magnetons per atom for this material
The number of bohr magnetons per atom for this material is 1.14 when some hypothetical metal that exhibits ferromagnetic behavior and that has 1 simple cubic crystal structure.
Given atomic radius of crystal structure (r) = 0.130nm
saturation flux density of crystal structure = 0.75tesla
We know that n = M/µN = B/µ0µN
n = BVc/µ0µN where Vc is the volume of crystal and B is bohr magneton
n = B(2r)^3/µ0µN = 0.75x(2x0.130x10-9)^3)/(1.25x10-26x9.27x10-24)
n = 13.18x10-30/11.5x10-50 = 1.14x10^20
Hence the number of bohr magnetons per atom for this material is 1.14 .
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assume there exists some hypothetical methat that exbihits ferromagnetic behavior and that has 1 simple cubic crystal strecutre, and atomic radius of 0.130 nm and a saturation flux density of 0.75 tesla. determine the number of bohr magnetons per atom for this material
When compared to a hypothetical ferromagnetic metal with a single simple cubic crystal structure, this substance possesses 1.14 bohr magnetons per atom.
Given that the cubic crystal atomic radius (r) is 0.130 nm
crystal structure's saturation flux density is equal to 0.75 tesla.
We are aware that n = M/N = B/0N.
n = BVc/0N, where BVc is the bohr magneton and Vc is the volume of the crystal.
N = 0.75x(2x0.130x10-9)3)/n = B(2r)3/0 (1.25x10-26x9.27x10-24)
n = 13.18x10-30/11.5x10-50 = 1.14x10^20
Therefore, this cubic crystal substance has 1.14 bohr magnetons per atom.
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what is the solubility (in moles/liter) of pbcl2 in a solution that is 0.15 m solution in hcl? (ksp pbcl2
the solubility (in moles/liter) of pbcl2 in a solution that is 0.15 m solution in hcl? (ksp pbcl2
Solubility of PbCl2 = 7.11×10−4 mol⋅L−1
The maximum amount of a chemical that will dissolve in a given amount of solvent at a given temperature is referred to as its solubility. Varying compounds have very different solubilities, which is a characteristic of a particular solute-solvent pair.What is solubility, for instance?
A typical illustration of a solution is the addition of sugar cubes to a cup of tea or coffee. Solubility is a quality that aids in the dissolution of sugar molecules. Thus, the ability of a substance (solute) to dissolve in a specific solvent can be defined as solubility.
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What makes a field forever unique?
From cotton fields to corn stalks, if this is what you mean, a forever field is unique in its own way by keeping all types of plants in the field. They are all different in how they grow and what they do.
