Answer: CH3-CO-CH3<CH3-CH2-OH<CH3-COOH
Explanation:
basically the boiling point depends upon the intermolecular hydrogen bonding. thus alcohol tends to have a higher boiling points then ketones because they have -OH group unlike carbonyl.
I need help with this questuon
Following are reactant and product states and the balanced chemical equation for the specified chemical reaction: NaOH(aq)+HCl(aq) → NaCl(aq)+H2O(l)
How do you balance a chemical equation?
Step 1: In both reactants and products, count each kind of atom.
Check whether there is exactly the same amounts of each atom on either side of the arrow. Otherwise, the equation is unbalanced, and you must move on to step 2.
Step 2: To increase the amount of atoms or molecules in the substances, place coefficients in front of the symbols or formulas as necessary. Make use of the fewest coefficients you can. Chemical formulations should never have their subscripts changed. The substances involved in the reaction can be altered by changing subscripts. Only modify the coefficients.
Till the equation is balanced, go back and repeat steps 1 and 2.
Following are reactant and product states and the balanced chemical equation for the specified chemical reaction:
In the reaction between sodium hydroxide and hydrogen chloride, sodium chloride and water are produced.
Hence,
NaOH(aq)+HCl(aq) → NaCl(aq)+H2O(l)
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if some filtrate splattered out of the beaker while it was heated how would this affect the measured results
Answer:
it will be all water and it needs to cool of
you have a sample containing 4.5g of an unknown gas. Based on the volume, temperature, and pressure of the sample, there are 0.14 moles of gas present. What is the molar mass (g/mol) of the unknown gas? please explain step by step
The molar mass of the gas is obtained as 32.1 g/mol.
What is the molar mass?The molar mass has to do with the mass one mole of a substance. We know that according to the question, we can be able to obtain the number of moles of the compound from the ideal gas equation.
This is how we are able to get the number of moles of the gas as 0.14 moles. Now we need to use the information that we have to get the molar mass of the gass.
Number of moles = mass/ molar mass
Molar mass = mass/Number of moles
Molar mass = 4.5g/0.14 moles
= 32.1 g/mol
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What is ethanoic or acetic anhydride?
Acetic anhydride is a colorless liquid with a characteristic pungent odor. It is used in the manufacture of plastics, drugs, dyes, perfumes, explosives, and aspirin.
This chemical compound has a colorless liquid appearance, also called anhydride, acetic, smells like vinegar.
what moon phase comes one month AFTER a waxing gibbous
A 1.50 g of urea/cholesterol mixture was added to 25.0 mL of water to separate the two compounds. The solid sample collected after filtration is 0.52. What is the % of urea in the sample
Based on the mass of the sample, the percentage mass of urea in the urea/cholesterol mixture is 65.3%.
What is the percentage of urea in the urea/cholesterol mixture?The percentage mass of urea in the urea/cholesterol mixture is determined using the formula below:
Percentage of urea = (mass of urea in sample/mass of sample) * 100%The mass of urea in the sample is obtained using the formula below:
Mass of urea = mass of sample - mass of cholesterolDuring the separation procedure of the mixture, urea which is soluble in water goes into the solvent phase whereas cholesterol is obtained as a solid.
Hence, the 0.52 g solid sample collected is cholesterol.
mass of urea = 1.50 - 0.52
mass of urea = 0.98
Percentage urea = 0.98/1.5 * 100%
Percentage mass of urea = 65.3%
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A gas is heated from 213.0 K to 498.0
K and the volume is increased from
23.0 liters to 55.0 liters by moving a
large piston within a cylinder. If the
original pressure was 1.15 atm, what
would the final pressure be?
Answer:
0.5 7.0 there is so many results
Explanation:
its very simple
A quantity of nitrogen gas is enclosed in a tightly stoppered 500 mL flask at room temperature (20.0 °C) and 0.836 atm pressure. The flask is then heated to 680 °C. If the flask can withstand pressures up to 3 atm, will it explode under this heating?
The vessel will not explode since the new gas pressure is less than 3 atm.
What will be the pressure when the temperature of a given volume of nitrogen gas is heated?The pressure when the temperature of a given volume of nitrogen gas is heated is calculated using the formula given below:
P₁/T₁ = P₂/T₂where;
P₁ = initial pressureT₁ = initial temperatureP₂= final pressureT₂ = final temperatureSolving for P₂
P₂ = P₁ * T₂ / T₁
P₂ = 0.836 * (680 + 273) / (20 + 273)
P₂ = 2.72 atm
The new pressure is less than 3 atm.
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Which compound has the highest molar mass?
polyethylene, a polymer of ethene
octanal, an eight-carbon aldehyde
ethane, a two-carbon hydrocarbon
octane, an eight-carbon hydrocarbon
Relative and average atomic mass both describe properties of an element related to its different isotopes. Out of these two Relative atomic mas is more accurate. The correct option is option A.
What is mass?Mass defines the quantity of a substance. It is measured in gram or kilogram. Average mass is the mass of atoms of an element that are isotopes. It can be calculated by multiplying mass of a isotope to natural abundance of that isotope.
Out of given compound, a polymer of ethene that is polyethylene will have highest molar mass. Polymer is a long chain of same or different monomer unit. Polymer has higher mass than the individual compound.
Therefore, option A is correct.
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Answer: polyethylene, a polymer of ethene
Write out the equilibrium constant expressions for the following reaction: CH4 (g) + 2 H₂S (g) → CS₂1 +
4 H₂(g)
The equilibrium constant expression for the given reaction of methane with hydrogen sulfide will be:
[tex]k_c = \frac{[CS_2][H_2]^4}{[CH_4][H_2S]^2}[/tex]
Equilibrium constant expression is a ratio of the concentration of products to that of the concentration of the reactants. It is given by k[tex]_c[/tex].
In the given reaction, the product of the concentration of the reactants is
[tex]k_r[/tex] = [tex][CH_4] [H_2S]^2[/tex]
while the product of the concentration of the products is
[tex]k_p[/tex] = [tex][CS_2][/tex] [tex][H_2]^4[/tex]
According to the definition,
[tex]k_c = \frac{k_p}{k_r}[/tex]
[tex]\therefore k_c = \frac{[CS_2][H_2]^4}{[CH_4][H_2S]^2}[/tex]
Thus, the equilibrium constant expression is the ratio of the concentration of products and reactants.
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The reaction for the combustion of propane is
C3H8+50₂ → 3 CO₂ + 4H₂O
ΔΗ = -526.3 kcal/mol
How much heat is released when 45.9 g of propane is burned?
Heat is released when 45.9 g of propane is burned is - 547.352 kcal
Given that :
ΔH = - 526.3 kcal/mol
mass = 45.9 g
molar mass = C₃H₈
= 12 × 3 + 8 × 1
= 44 g / mol
The reaction is given as :
C₃H₈ + 5O₂ -----> 3CO₂ + 4H₂O
number of moles = mass / molar mass
= 45.8 / 44
= 1.04 mol
ΔH = Q / n
where ,
Q = heat
n = number of moles
Q = ΔH × n
= - 526.3 × 1.04
Q = - 547.352 kcal
Thus, The reaction for the combustion of propane is :
C₃H₈ + 5O₂ -----> 3CO₂ + 4H₂O
Heat is released when 45.9 g of propane is burned is - 547.352 kcal
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Two solutions are prepared by a chemist. One of the solutions is 150.0 ml of a 3.5 x 10¹5 M HNO3.
The other solution is 250.0 ml of a 0.63 M solution of HNO2.
Compare the pH of each solution.
The pH of the solutions are as follows:
a. pH = 4.4
b. pH = 0.2
What is the pH of a solution?The pH of a solution is a measure of the acidity or basicity of a solution.
The pH is defined as the negative logarithm of the hydrogen ion concentration of a substance.
pH = -log [H⁺]
where [H⁺] is the hydrogen ion concentration
The pH of the solutions are as follows:
a. 150.0 ml of a 3.5 x 10⁻⁵ M HNO3.
pH = -log (3.5 x 10⁻⁵)
pH = 4.4
b. 250.0 ml of a 0.63 M solution of HNO2
pH = -log (0.63)
pH = 0.2
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a sample of an unknown gas has a volume of 8.00L at 1.00 atm and 25.0°C. How many moles of gas are present? please explain in full detail so i can learn it
0.33 mol is the amount of the unknown gas present.
What amount of moles of the gas is present?The ideal gas law states that "the pressure multiplied by volume is equal to moles multiply by the universal gas constant multiply by temperature.
It is expressed as;
P × V = n × R × T
Where P is pressure, V is volume, n is the amount of substance, T is temperature and R is the ideal gas constant ( 0.08206 Latm/molK ).
Given the data in the question;
Volume of gas V = 8.00lPressure P = 1.00atmTemperature T = 25°C = ( 25 + 273.15 )K = 298.15KAmount of gas n = ?Plug the given values into the ideal gas law formula and solve for n ( amount of gas in moles ).
P × V = n × R × T
n = ( P × V ) / ( R × T )
n = ( 1.00atm × 8.00L ) / ( 0.08206Latm/molK × 298.15K )
n = 8.00Latm / 24.466189Latm/mol
n = 0.33 mol.
Therefore, the amount of gas is 0.33 mol.
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How many moles are in a system that is 223 K, with an internal pressure
of 10 atm, in a fixed container that is 27 L
O 14.75 mol
O 1.21 mol
O 825 mol
5.42 mol
* 2 points
Answer:
A.) 14.75 mol
Explanation:
To find the amount of moles, you need to use the Ideal Gas Law equation:
PV = nRT
In this equation,
-----> P = pressure (atm)
-----> V = volume (L)
-----> n = number of moles
-----> R = Ideal Gas Constant (0.08206 L*atm/K*mol)
-----> T = temperature (K)
You can plug the given values and the constant into the equation and simplify to find "n".
P = 10 atm R = 0.08206 L*atm/K*mol
V = 27 L T = 223 K
n = ? moles
PV = nRT <----- Ideal Gas Law
(10 atm)(27 L) = n(0.08206 L*atm/K*mol)(223 K) <----- Insert variables
270 atm*L = n(18.299 L*atm/mol) <----- Mutliply
14.75 mol = n <----- Divide both sides by 18.299
How many molecules are in 30 g of CO2?
Given the equation:
C2H6 (g) + O2 (g) → CO2 (g) + H2O (g) (not balanced)
Determine the number of liters of CO2 formed at STP when 891.6 grams of C2H6 is burned in excess oxygen gas.
Your answer should be numerical and neglect units (e.g., if you calculate 3.5L then input 3.5).
The volume of CO₂ produced at STP when 891.6 grams of C2H6 is burned in excess oxygen gas is 1331.4 liters.
What is the volume in liters of CO₂ produced when 891.6 grams of C2H6 is burned in excess oxygen gas?The volume of a gas produced at STP is determined from the mole ratio of the reaction that produces the gas.
The mole ratio of the reaction that produces the gas is obtained from the equation of the reaction.
Considering the given data, the volume of CO₂ produced when 891.6 grams of C2H6 is burned in excess oxygen gas is calculated as follows:
Equation of reaction: 2 C₂H₆ (g) + 7 O₂ (g) → 4 CO₂ (g) + 6 H₂O (g)
2 moles of C₂H₆ when burned in excess oxygen at STP produces 4 moles of CO₂.
The number of moles of C₂H₆ in 891.6 grams is calculated as follows:
Moles = mass / molar mass
The molar mass of C₂H₆ = 30 g/mol
Moles of C₂H₆ in 891.6 g = 891.6 / 30
Moles of C₂H₆ = 29.72 moles
Hence moles of CO₂ produced = 29.72 * 4/2 moles
Volume of 1 mole of CO₂ at STP = 22.4 liters
Volume of CO₂ produced = 29.72 * 4/2 * 22.4
Volume of CO₂produced = 1331.4 liters.
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a student investigated heat transfer using a bottle of water
The result of the Heat Transfer experiment is given as follows: "The molecule was increased in kinetic energy but in a random structure." (Option B)
What is Heat Transfer?Heat transfer is a thermal engineering subject that deals with the creation, consumption, conversion, and exchange of thermal energy across physical systems.
Heat transmission is categorized into several methods, including thermal conduction, thermal convection, thermal radiation, and energy transfer via phase shifts.
At 3 p.m., the water temperature is raised. The average kinetic energy of an item is related to its temperature. As a result, as temperature rises, so does average kinetic energy.
Kinetic energy is created by the random movement of molecules. Hence, the correct answer is "The molecule was increased in kinetic energy but in a random structure."
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Full Question:
A student investigated heat transfer using a bottle of water. The student placed the bottle in a room at 20.50C. The student measured the temperature of the water in the bottle at 7 a.m. and again at 3 p.m. The data from the investigation are shown in the table below.
[See attached image]
Question:How would you describe the average kinetic energy of the water molecules in the bottle at 7 a.m. to the average kinetic energy of the water molecules in the bottle at 3 p.m.
The molecules were increased in kinetic energy but in a uniform structure. The molecules were increased in kinetic energy but in a random structure. The molecules were decreased in kinetic energy but in a uniform structure. The molecules were decreased in kinetic energy but in a random structure.Which practice is the most sustainable?
A. Using a combination of paper and plastic grocery bags only once
B. Using cloth grocery bags over and over again
C. Using paper grocery bags once and then recycling them
D. Using plastic grocery bags once and then recycling them
The practice is the most sustainable is using cloth grocery bags over and over again.
The sustainable practices are the practices which supports the ecological and economic health . the is of plastic bag , paper or cloth bag over and over again . we have to reuse for the shopping purpose. go for the paperless document. cloth bag are reusable and better than a plastic bags. cloth bag will reduces the plastic use and the pollution will also reduce caused by the plastic bags.
Thus, The practice is the most sustainable is using cloth grocery bags over and over again.
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If you want to distinguish between alkanes and alkenes using chemical reactions, which test: the combustion or the bromine is the better one? Explain your answer. Question 2: what you can use to wash the cloth contaminated by oil?
1) We could use the bromine water test to tell the difference between the alkane and the alkene
2) We can use a detergent to wash a cloth that is contaminated by oil.
What is an alkane?The term alkane has to do with a hydrocarbon that is composed of only a straight chain compound there are no multiple bonds in the alkane molecule and this is the difference between the alkane and the alkene. The alkene is composed of double bonds. The alkene compounds are able to decolorize bromine water while the alkanes can not.
If you have a contaminated cloth, you can be able to wash it by the use of a detergent because it is able to lift off the grease or oil by the use of the hydrophobic tail of the detergent.
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If 18.0 grams of water were actually produced, what is the percent yield of the reaction between 4 g of hydrogen gas and 1.5 mol of oxygen gas?
The percent yield of the water is 33.3%.
What is the percent yield?We know that the reaction that takes place between hydrogen and oxygen to give water is; [tex]2H_{2} (g) + O_{2} (g) ----- > 2H_{2}O(g)[/tex]. We now need to find the number of moles of hydrogen = 4 g/2 g/mol = 2 moles
Now;
If 2 moles of hydrogen reacts with 1 moles of oxygen
We can see that oxygen is the limiting reactant in this case.
1 mole of oxygen produces 2 moles of water
1.5 moles of oxygen produces 1.5 * 2/1
= 3 moles of water
Then the theoretical yield of water = 3 moles * 18 g/mol = 54 g
Percent yield = Actual yield / theoretical yield * 100/1
= 18/54 * 100/1
= 33.3%
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nasa measured the frequency of a cosmic ray emission to be 2.3 x 10^24 Hz. what is the wavelength in nm of this cosmic ray
The wavelength of the cosmic ray when the frequency is 2.3 x 10^24 Hz is 1.304 x 10^-7 nm.
What is wavelength?
Wavelength in a wave is the distance between any given point on a wave and the same point on the adjacent wave that is crest to crest or trough to trough. It can be measured in the direction of the given wave.
The wavelength in nm of the cosmic ray can be calculated as,
λ = c / ν
where λ is the wavelength, ν is frequency in Hz or s^-1 and c is velocity of light.
λ = (3 x 10^8 m/s) / 2.3 x 10^24 Hz = 1.304 x 10^-16 m = 1.304 x 10^-7 nm.
Therefore, the wavelength of the cosmic ray when the frequency is 2.3 x 10^24 Hz is 1.304 x 10^-7 nm.
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what is the limiting agent in 3 C2H3O2H + Al(OH)3
To solve such this we must know the concept of chemical reaction and concept of limiting agent. Therefore, C[tex]_2[/tex]H[tex]_3[/tex]O[tex]_2[/tex]H is limiting agent in the given balanced equation.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
The balanced reaction is
3 C[tex]_2[/tex]H[tex]_3[/tex]O[tex]_2[/tex]H + Al(OH)[tex]_3[/tex][tex]\rightarrow[/tex]
The limiting reagent depends on the mole ratio and not on the masses of the reactants present. 1 mole of Al(OH)[tex]_3[/tex] need 3 moles of 3 C[tex]_2[/tex]H[tex]_3[/tex]O[tex]_2[/tex]H. So, C[tex]_2[/tex]H[tex]_3[/tex]O[tex]_2[/tex]H is limiting reagent.
Therefore, C[tex]_2[/tex]H[tex]_3[/tex]O[tex]_2[/tex]H is limiting reagent.
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how does increasing plant biomas affect atmospheric co2
Plants absorbs the atmospheric carbon dioxide and use it up for photosynthesis. Hence, increasing plant biomass reduces the atmospheric carbon dioxide.
What is photosynthesis?Photosynthesis is a biochemical process by which the plants synthesis glucose and energy in leaves using carbon dioxide and water with the aid of light energy.
The pigment chlorophyll is a photoactive substance which absorbs the light energy. Using carbon dioxide and water plants synthesis glucose and oxygen is released in this reaction.
Therefore, as the plant biomass increases, the intake of carbon dioxide by these plants increases, leading to a reduction in the atmospheric carbon dioxide which is good to decline the effect of global warming also.
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Which of the following is the correct formula to calculate percent by mass? [Mass of solution (g) + mass of solute (g)] × 100 [Mass of solute (g) − mass of solution (g)] × 100 [Mass of solute (g) ÷ mass of solution (g)] × 100 [Mass of solution (g) ÷ mass of solute (g)] × 100
Considering the definition of percent by mass, the correct answer is the third option: the correct formula to calculate percent by mass is [Mass of solute (g) ÷ mass of solution (g)] × 100
Definition of percent by massThe percent by mass is a measure of the amount of mass that an element occupies in a compound and it is defined as the ratio of the mass of the solute to the mass of the solution, expressed as a percentage.
To calculate the percentage of composition, it is necessary to know the mass of the element in a known mass of the compound.
So, the percent by mass is calculated as the mass of the solute divided by the mass of the solution, the result of which is multiplied by 100 to give a percentage:
percent by mass= [Mass of solute (g) ÷ mass of solution (g)] × 100
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Hydrogen gas is collected over
water at a total pressure of 1.00
atm. The volume of hydrogen
collected is 35.0 mL at 27.0°C. How
many grams of hydrogen gas was
collected?
Answer:21.0 mL
shorten math
How many molecules are in 72.0 moles of CO₂?
Taking into account the definition of Avogadro's Number, 4.33656×10²⁵ molecules are in 72 moles of CO₂.
Avogadro's NumberAvogadro's Number is called the number of particles that make up a substance (usually atoms or molecules). This particles can be found in the amount of one mole of said substance.
Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.
Amount of molecules on 72 moles of CO₂Then you can apply the following rule of three: if 1 mole of CO₂ contains 6.023×10²³ molecules, 72 moles of CO₂ contains how many molecules?
amount of molecules of CO₂= (6.023×10²³ molecules × 72 mole)÷ 1 mole
amount of molecules of CO₂= 4.33656×10²⁵ molecules
Finally, 4.33656×10²⁵ molecules are present in 72 moles of CO₂.
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Which description of the atoms resulted from this experiment
Option D, A small, positive nucleus is mostly empty.
Rutherford's atomic version is the version which defined the atom as a tiny, dense, undoubtedly charged middle referred to as a nucleus, wherein almost all of the mass is focused, round which the light, bad constituents, referred to as electrons, flow into at a few distance, just like planets revolving across the Sun.
What is the Rutherford gold-foil test, A piece of gold foil became hit with alpha debris, that have a fantastic charge. Most alpha debris went proper through. This confirmed that the gold atoms had been normally empty space.
The 3 fundamental observations of the test had been: Most of the distance within the atom is empty. All the fantastic costs are focused in a completely small vicinity in the atom, referred to as the nucleus. The nucleus's length may be very small as compared to the scale of the atom.
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Help asap!!! What is rock cycle? How to label?
hope this helps you out I would have typed an answer using my notes but that was taking to long anyways have a nice day
The substances sodium (Na), oxygen (O₂), and sodium oxide (Na2O) participate in this chemical reaction:
4Na + O2 → 2Na₂O.
Which statement best describes the reaction?
Sodium oxide is created by the chemical reaction statement best describes the reaction .
What is chemical reaction ?
Chemical reactions happen absolutely everywhere. While we sometimes associate chemical reactions with the sterile environment of test tubes and laboratories, nothing is farther from the truth. In fact, a vast number of transformations are creating a dizzying and almost incomprehensible series of new matter and energy changes in our world every second of every day.
In nature, chemical reactions are much more uncontrollable and sometimes much more complex than in the laboratory. Chemical reactions usually occur as needed. The fire raging in the forest, the slow rusting process of iron over the years in the presence of oxygen and water, or the delicate ripening of the fruit on the tree, the process of transforming various chemicals... ( The transformation of one group of substances (products) into another group of substances (products) is a so-called chemical reaction.
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if a reaction that should theoretically yield 20 g of a product has a 45% yield, what is the actual yield of product
If if a reaction that should theoretically yield 20 g of a product has a 45% yield, The actual yield of product is 9g.
How to find the actual yield?Using this formula to find the actual yield of product
Actual yield of product = Actual yield × Theoretically yield
Where:
Actual yield = 45% or 0.45
Theoretically yield = 20g
Let plug in the formula
Actual yield = 0.45 × 20g
Actual yield= 9g
Therefore the actual yield is 9g.
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Taking into account definition of percent yield, the actual yield of the product is 9 g.
Percent yieldThe percent yield is the ratio of the actual return to the theoretical return expressed as a percentage.
The percent yield is calculated as the experimental yield divided by the theoretical yield multiplied by 100%:
percent yield= (actual yield÷ theoretical yield)× 100%
where:
The actual yield is the amount of product that is actually formed when the reaction is carried out.The theoretical yield is the amount of product acquired through the complete conversion of all reagents in the final product, that is, it is the maximum amount of product that could be formed from the given amounts of reagents.Actual yield of product in this caseIn this case, you know:
Percent yield: 45%Actual yield: ?Theoretical yield: 20 gReplacing in the definition of percent yield:
45%= (actual yield÷ 20 g)× 100%
45%÷100%= actual yield÷ 20 g
0.45= actual yield÷ 20 g
0.45×20 g= actual yield
9 g= actual yield
Finally, the actual yield is 9 g.
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