What is the frequency of 7.94nm (7.94*10^-7m)?
Answers
Answer:
I don't know the answer but I do really like your profile picture, it's cool. He is my favorite character from Demon Slayer
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Consider the unbalanced equation for the oxidation of butene. C4H8 + 6O2 Right arrow. CO2 + H2O For each molecule of C4H8 that reacts, how many molecules of carbon dioxide and water are produced? Group of answer choices 2 CO2 & 2 H2O 4 CO2 & 4 H2O 2 CO2 & 4 H2O 4 CO2 & 2 H2O
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Step 1: Consider 0.10 M solutions of acetic acid, ammonia, hydrochloric acid, and sodium hydroxide. Rank these solutions in order of increasing pH (starting from the lowest, and ending with the highest pH value). Please also make a statement, whether each solution is an acidic or a basic one, and provide an explanation why.
Step 2: How many carbon atoms are there in a molecule of each of the following:
a. ethane b. 1-butyne c. propene d. cyclooctane
Please provide molecular formula for each of the four above mentioned compounds.
Example: 2-pentene - contains 5 atoms of C, molecular formula is C5H10
Answers
The order of the increasing pH of the solution is Hydrochloric acid, Acetic acid, Ammonia, and Sodium hydroxide.
Molecular formula of compounds: Ethane: C2H6, 1-Butyne: C4H6, Propene: C3H6 and Cyclooctane: C8H16
Rank of solutions in order of increasing pH:
Hydrochloric acid (HCl) is a strong acid that dissociates completely in water. Its pH is very low (less than 1) and it is strongly acidic. It is an acidic solution. It's a 1.0 M solution of hydrochloric acid.
Ammonia (NH3) is a weak base that does not completely dissociate in water. It is a weak base with a pH greater than 7 but less than 10. It is a basic solution. It's a 1.0 M solution of ammonia.
Acetic acid (CH3COOH) is a weak acid that does not completely dissociate in water. It has a pH of around 3.5-4.0, making it a weakly acidic solution. It is an acidic solution. It's a 1.0 M solution of acetic acid.
Sodium hydroxide (NaOH) is a strong base that dissociates completely in water. It has a very high pH (greater than 14), making it a strongly basic solution. It is a basic solution. It's a 1.0 M solution of sodium hydroxide.
So, from the above explanation, the order of the increasing pH of the solution is
Hydrochloric acid, Acetic acid, Ammonia, and Sodium hydroxide.
Step 2: Molecular formula of compounds:
Ethane: C2H6, contains 2 carbon atoms
1-Butyne: C4H6, contains 4 carbon atoms
Propene: C3H6, contains 3 carbon atoms
Cyclooctane: C8H16, contains 8 carbon atoms
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classify the components as most accurately describing cofactors, coenzymes, or neither.
1. Ca2+
2. Urease
3. NADP
4. CoQ
5. ascorbic acid
6. Inorganic ion
a. Cofactors
b. Coenzymes
c. Neither ascorbic acid
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There are no components in the list which are neither cofactors, or coenzymes.
The components as cofactors are Ca2+, Urease, CoQ, ascorbic acid, and Inorganic ion. A cofactor is a non-protein matter or bimetallic particle that's needed for an enzyme's role as a catalyst. Cofactors may be thought-about "helper molecules" that assist in biochemical transformations.
The component as coenzymes is NADP. Coenzymes ar organic compounds needed by several enzymes for chemical change activity. they're typically vitamins, or derivatives of vitamins. typically they'll act as catalysts within the absence of enzymes, however not thus effectively as in conjunction with an enzyme.
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How many molecules are there in 25.0 grams of water?
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Answer:
1.389 mol
Explanation:
\(1+1+16=18g/mol.n=mMr=2518=1.389mol.\)
How many nickels are there in $5.25?
Answers
Answer:
105
Explanation:
1 nickel = 5 cents
5.25 dollars x 100 cents
= 525 cents
525 cents / 5 cents
= 105 nickels
A football player runs in a straight line down the field, crossing the 20-yard line when the stopwatch reads 12 seconds and crossing the 70-yard line when the stopwatch reads 17 seconds. What is his speed in yards per second?
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Answer: 10y/s
Explanation:
The vapor pressure of benzene is 100.0 mmHg at 26.1 degree C. Calculate the vapor pressure of a solution containing 24.6 g of camphor (C_10H_16O) dissolved in 98.5 g of benzene. (Camphor is a low-volatility solid.)
Answers
The vapor pressure of the solution containing 24.6 g of camphor dissolved in 98.5 g of benzene would be lower than the vapor pressure of pure benzene.
To calculate the vapor pressure of the solution, we need to apply Raoult's law, which states that the vapor pressure of a solution is directly proportional to the mole fraction of the solvent present.
Step-by-step explanation:
1. Calculate the number of moles of camphor (C10H16O) and benzene (C6H6) using their respective molar masses.
Moles of camphor = mass of camphor / molar mass of camphor
Moles of benzene = mass of benzene / molar mass of benzene
2. Calculate the mole fraction of benzene.
Mole fraction of benzene = moles of benzene / (moles of benzene + moles of camphor)
3. Use Raoult's law to calculate the vapor pressure of the solution.
Vapor pressure of the solution = mole fraction of benzene * vapor pressure of pure benzene
Note: The vapor pressure of pure benzene is given as 100.0 mmHg at 26.1 °C.
In the description, I have provided the general steps to calculate the vapor pressure of the solution based on Raoult's law.
However, I cannot provide the exact numerical calculation without the values of the molar masses of camphor and benzene.
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A sample of crystalline compound when heated in an open test tube, produced several droplets of water on the upper part of the test tube. When the residue is dissolved in water, a yellow brown solution is formed. In contrast to The colorless solution formed when a sample of the original compound is dissolved in water. what evidence would lead you to conclude that the compound is not truly hydrate
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To be considered a true hydrate, a compound must follow a few rules, and one of these rules is the color being the same before and after heating. In this case we have a difference in the color, the residue after heating when dissolved in water is forming a yellow brown solution, and in the meanwhile, a colorless solution is formed when a sample of the original compound is dissolved in water, which is not a characteristic of a true hydrate.
Which is more polar- benzaldehyde or 1-phenyl-1-propanol? explain your response.
Answers
Benzaldehyde is less polar than 1-phenyl-1-propanol because Benzaldehyde have higher polar functional group hence, they will be non-polar.
The liquid form of benzaldehyde is transparent, colorless to yellow, and it smells like bitter almonds. close to 145°F flash point. greater density and water insolubility. therefore submerges in water. Air is lighter than vapors. The environment poses the biggest threat. To prevent transmission to the environment, action needs to be taken right away. easily permeates the soil to contaminate the adjacent streams and groundwater. used to create fragrances and flavors.
The group of chemical substances referred to as phenylpropanoids includes 1-phenyl-1-propanol. These are phenylpropane-containing organic substances. The flavor of 1-Phenyl-1-propanol was sweet, balsamic, and flowery.
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Which of these measurements is expressed with the most significant figures?
Question 6 options:
150 liters
1.5 × 104 light years
0.000342 grams
0.20008 kilometers
Answers
Answer:
the ans is
Explanation:
1.5 × 104 light years
Answer:
1.5 × 104 light years
Explanation:
a concentration cell is constructed using two ni electrodes with ni2 concentrations of 1.00 m and 1.00 x 10-4 m in the two half-cells. calculate the potential of the cell at 25oc.
Answers
The cell potential for the cell as calculated is 0.118 V
What is the Nernst equation ?To determine a cell's potential under unusual circumstances, utilise the Nernst equation. Due to the nickel composition of the cathode and anode, the conventional cell potential in this instance is zero.
Hence
Ecell = E°cell - 0.0592/nlog Q
Ecell = 0 - 0.0592/2 log (1 00 * 10^-4/1)
Ecell = 0.118 V
The cell potential for the cell as calculated is 0.118 V
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the complete combustion of 1.5 moles of methane (ch4) would require how much o2?
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The complete combustion of 1.5 moles of methane (CH4) would require 6 moles of oxygen (O2).
This is because methane is a hydrocarbon and it follows the general equation of combustion for hydrocarbons: CxHy + (x+y/4)O2 → xCO2 + yH2O. In this equation, x and y represent the number of carbon and hydrogen atoms, respectively, in the hydrocarbon.
Therefore, for methane, where x = 1 and y = 4, the equation simplifies to CH4 + (1+4/4)O2 → CO2 + 2H2O. Thus, for 1.5 moles of methane, the equation becomes 1.5CH4 + (1+4/4)1.5O2 → 1.5CO2 + 3H2O.
Since the equation must be balanced, the total amount of oxygen required is 1.5 moles of O2, which is equal to 6 moles.
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Determine the number of moles in 5.25x1024 formula units if lead (IV) oxide.
Answers
Answer:
8.72 mol PbO₂
General Formulas and Concepts:
Chemistry - Atomic Structure
Using Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:
Step 1: Define
5.25 × 10²⁴ formula units PbO₂
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
\(5.25 \cdot 10^{24} \ formula \ units \ PbO_2(\frac{1 \ mol \ PbO_2}{6.022 \cdot 10^{23} \ formula \ units \ PbO_2} )\) = 8.71803 mol PbO₂
Step 4: Check
We are given 3 sig figs. Follow sig fig rules and round.
8.71803 mol PbO₂ ≈ 8.72 mol PbO₂
If 26 grams of N2 are present, how many moles of NF3 will be produced?
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The balanced chemical equation for the reaction between N2 and F2 to produce NF3 is N2(g) + 3F2(g) → 2NF3(g). The molar mass of N2 is 28.02 g/mol. Therefore, 26 g of N2 is equal to 0.93 moles of N2.
What is the ratio of moles of NH3 to moles of N2?The preceding balanced equation clearly shows that 2 moles of ammonia are created for every 1 mole of nitrogen. This indicates that the reaction's N2 to NH3 mole ratio is 1 to 2.
What number of moles of NH3 will be produced?There are 14 moles of NH3 produced. The balanced chemical equation must first be written. Then use the unitary approach to fix the issue. Now, the mass of ammonia is determined using the following formula.
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calculate the clinical sensitivity for the following data: in a group of 80 patients diagnosed with sickle cell disease, 72 had positive test results. the clinical sensitivity of this test is
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The clinical sensitivity of this test, based on the given data, is 90%.
In the given data, there were 80 patients diagnosed with sickle cell disease, out of which 72 had positive test results. To calculate the clinical sensitivity of the test, we need to determine the proportion of true positives (patients with positive test results) among all the patients diagnosed with the disease.
Clinical sensitivity, also known as the true positive rate or the sensitivity of a test, can be calculated using the formula:
Clinical Sensitivity = (Number of true positives / Total number of patients with the condition) x 100
In this case, the number of true positives is 72 (patients with positive test results), and the total number of patients with the condition is 80 (patients diagnosed with sickle cell disease).
Plugging these values into the formula:
Clinical Sensitivity = (72 / 80) x 100 = 90%
Therefore, the clinical sensitivity of this test, based on the given data, is 90%. This means that the test correctly identifies 90% of the patients who truly have sickle cell disease among the group of patients diagnosed with the condition.
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Which one of the following substances would you predict to have the highest vapor pressure at given temperature? in these line drawings, a carbon is implicit at the end of a line (bond) or where two or more lines come together. carbon requires four bonds, so any missing bonds are implicitly bonds to hydrogen atoms
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As a result, the material with the lowest boiling point will have the maximum vapor pressure at ambient temperature. The material with the lowest vapor pressure is that which has the greatest boiling point.
What variables influence vapor pressure?
Vapor pressure is the name given to the force produced when liquids evaporate. Three factors that typically affect vapor press performance are surface area, intermolecular forces, and temperature. Molecules have variable vapor pressures depending on their temperature.
What is vapour pressure, for instance?
It is essential to remember that a liquid's vapor pressure is equal to the atmospheric pressure while it is boiling. For instance, water's vapor pressure when it boils at sea level is 1 atmosphere since the surrounding pressure is also 1 atmosphere.
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why is electrolysis used to extract some metals
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Answer:
Very reactive metals, such as aluminium, form stable oxides and other compounds. Electrolysis is commonly used to extract these metals and requires a lot of electric current (energy) to reduce them to extract the metal. Less reactive metals, such as iron, form less stable oxides and other compounds.
Explanation:
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Electrolysis is the strategy by which electric flow is gone through a substance to impact a synthetic change.
Electrolysis:This method is used to extract metals.
Electrolysis is the process in which electrons are being added to metal particles at the negative electrode. The disadvantage (especially in the aluminum case) is the expense of the power. A benefit is that it can deliver extremely unadulterated metals.
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Provide the complete, balanced reaction for H2CO3(aq)+2NaOH(aq).
Balanced:
Ionic:
Net ionic:
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The complete, balanced reaction for H2CO3(aq) + 2NaOH(aq) is:
H2CO3(aq) + 2NaOH(aq) → Na2CO3(aq) + 2H2O(l)
Ionic equation:
H2CO3(aq) + 2Na+(aq) + 2OH-(aq) → Na2CO3(aq) + 2H2O(l)
Net ionic equation:
H2CO3(aq) + 2OH-(aq) → CO32-(aq) + 2H2O(l)
In the net ionic equation, the spectator ion Na+ is not included as it does not participate in the reaction.
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what happens to the speed of a sound wave from an underwater animal as the sound passes into the air above?
A. It stays the same
B. It falls to zero
C. It decreases
D. It increases
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i believe so.
The amount of water flowing through a channel over a given amount of time is called its ______.
Answers
Answer:
Discharge
Explanation:
this is the answer
What do the conclusions tell about the experiment?
A. The conclusions tell why the data support or reject the hypothesis.
OB. The conclusions tell what other scientists think about the
experiment.
OC. The conclusions tell if the scientific method was followed.
OD. The conclusions tell how the experiment should be repeated.
SUBMIT
Answers
The conclusions tell why the data support or reject the hypothesis. The correct option is A
What is conclusions ?The final step in the scientific method is to draw conclusions from an experiment. They provide a summary of the experiment's findings and a discussion of how the data confirm or refute the hypothesis.
The conclusions ought to go through the experiment's limitations and recommend any potential future studies.
Therefore, The conclusions tell why the data support or reject the hypothesis.
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a. Among nonpolar liquids, those with higher molar masses tend to have normal boiling points that are (higher, lower, or about the same).
b. Among compounds of approximately the same molar mass, those with greater polarities tend to have enthalpies of vaporization that are (higher, lower, or about the same).
c. Which is the only noble gas listed that is stable as a liquid at 0°C? Explain your answer using the concept of critical temperature.
Answers
Answers are below...and I have answered this question on the basis of above table.
Explanation :-
(a.) Among nonpolar liquids, those with higher molar masses tend to have normal boiling points that are (lower).
(b.) Among compounds of approximately the same molar mass, those with greater polarities tend to have enthalpies of vaporization that are (higher).
(c.) Xe (Xenon), a substance can exist only as a gas at temperatures above its critical temperature. Of the noble gases listed, only Xe has a critical temperature above O°c.
Among nonpolar liquids, those with higher molar masses tend to have normal boiling points that are lower. Among compounds of approximately the same molar mass, those with greater polarities tend to have enthalpies of vaporization that are higher.Xenon can exist only as a gas at temperatures above its critical temperature.
What is a compound?Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.
Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:
1)Molecular compounds where in atoms are joined by covalent bonds.
2) ionic compounds where atoms are joined by ionic bond.
3)Inter-metallic compounds where atoms are held by metallic bonds
4) co-ordination complexes where atoms are held by co-ordinate bonds.
They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.
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How does a chemical reaction change one substance into another?
Answers
Answer:
Explanation:
By rearrangement of atoms of reactants. The entire properties will also different from the reactants as the composition changes.
What is the concentration of H₂(g), in parts per million, in a solution that contains 0.0001 g of H2(g) dissolved in 100. g of H₂O(l)?
Answers
Answer:
1 ppm :)
Explanation: i was guessing and 1 ppm was the answer :)
Which of the following reactants is involved in both fatty acids synthesis and breakdown? A. CO2. B. Malonyl-CoA. C. NADPH. D. Pantothenic acid.
Answers
Malonyl-CoA reactant is involved in both fatty acid synthesis and breakdown.
It is used in the formation of fatty acids as an intermediate molecule in fatty acid synthesis. In fatty acid breakdown, on the other hand, it acts as a substrate for the breakdown of fatty acids in the mitochondria to produce energy. Furthermore, NADPH is involved in the synthesis of fatty acids because it provides the necessary reducing power. Pantothenic acid, also known as Vitamin B5, is a cofactor needed for fatty acid synthesis and other cellular processes. A. Although CO2 is not directly involved in the synthesis or breakdown of fatty acids, it is produced as a byproduct of cellular respiration.
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Write the chemical equation for the base ionization of methylamine, CH33NH22. Write the Kbb expression for methylamine.
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The chemical equation for the base ionization of methylamine, CH₃NH₂, is: CH₃NH₂ + H₂O ⇌ CH₃NH₃⁺ + OH⁻. The Kbb expression for methylamine can be written as: Kbb = [CH₃NH₃⁺][OH⁻]/[CH₃NH₂]
In the above equation, [CH₃NH₃⁺] represents the concentration of methylammonium ions, [OH⁻] represents the concentration of hydroxide ions, and [CH₃NH₂] represents the concentration of methylamine. The equilibrium constant, Kbb, can be used to calculate the degree of ionization of the methylamine solution, as well as the concentration of hydroxide ions in the solution.
Methylamine is a weak base, and its ionization constant, Kb, is 4.4 x 10⁻¹⁰ at 25°C. The base ionization equation of methylamine can be derived from the Kb expression by using the equilibrium constant expression and solving for the products and reactants.
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Give the set of four quantum numbers that could represent the electron lost to form the K ION from the K atom.
Question 31 options:
n = 3, l = 1, ml = 1, ms = - 1/2
n = 4, l = 1, ml = 1, ms = +1/2
n = 4, l = 4, ml = 0, ms = -1/2
n = 4, l = 0, ml = 0, ms = + 1/2
n = 3, l = 0, ml = 1, ms = + 1/2
Answers
The set of four quantum numbers that could represent the electron lost to form the K ION from the K atom is:
n = 4, l = 0, ml = 0, ms = + 1/2.
The electronic configuration of K is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹.
When potassium atom loses an electron, it loses the 4s¹ electron. The configuration of K⁺ is 1s² 2s² 2p⁶ 3s² 3p⁶.Thus, the set of four quantum numbers that could represent the electron lost to form the K ION from the K atom is:
n = 4, l = 0, ml = 0, ms = + 1/2.
Quantum numbers are used to fully describe the electron configuration of an atom and provide information about the energy, orbital shape, orientation, and spin of electrons.
They play a crucial role in understanding the electronic structure and behavior of atoms and molecules.
The principal quantum number (n) describes the energy level or the shell in which the electron is present. The angular momentum quantum number (l) describes the subshell in which the electron is present. The magnetic quantum number (ml) describes the orientation of the orbital. The spin quantum number (ms) describes the spin of the electron.Learn more about quantum number:
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what materials transmits the most light waves?
Answers
Answer: what materials transmits the most light waves?
Explanation:
A single replacement reaction is a reaction in which one element replaces a similar element within a compound.
Answers
A single replacement reaction, also known as a single displacement reaction, occurs when one element in a molecule is swapped out for another.
In a single replacement reaction, what replaces what?When one element replaces another in a compound, it is known as a single replacement reaction. A + BC → B + AC is a good representation of this kind of reaction. When two ionic compounds exchange ions and create two new ionic compounds, this is known as a double replacement reaction.
What reaction occurs when one element in a compound substitutes another?Replacement is the reaction that occurs when one element swaps places with another in a compound or when two components in two separate compounds switch places.
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Decide which of these pairs of reactants react, and write word equations for the reactions; magnesium and copper oxide; zinc and magnesium oxide; zinc and copper sulfate solution.
Answers
Answer:
Mg + CuO2 = MgO + Cu+
Zn + MgO= ZnO + Mg
Zn + Cuso4 = ZnS + SO2 + Cu
what are the conditions for reaction like are they cocentrated?