What is the intermolecular force of h2co.
Answers
The intermolecular force of H₂CO is dipole-dipole force.
Dipole-dipole force as an intermolecular forceDipole-dipole forces are attractive intermolecular forces that exist between the positive end of one polar molecule and the negative end of another polar molecule.
In order for dipole-dipole forces to be present, a molecule must be polar. The positive end of one molecule is attracted to the partial negative end of another H₂CO as a polar moleculeH₂CO is a polar molecule due to the differences in the electronegativity of carbon and oxygen.
Oxygen is more electronegative than carbon, hence, some negative charge is induced on the oxygen atom and a partial positive charge is induced on the carbon atom.
The induced positive and negative charges generates the dipole moment directed from carbon to oxygen atom.
Therefore, molecules of H₂CO are held together by dipole-dipole attractions between the oxygen and carbon atoms.
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Related Questions
Examine the density values for several common liquids and solids given in Table 6. Sketch the results of an experiment that layered each of the liquids and solids in a 1000-mL graduated cylinder
Answers
The experiment involves layering water, ethanol, olive oil, milk, ice, and a chosen metal in a 1000-mL graduated cylinder based on their respective density values.
Water is filled up to the 500-mL mark and then ethanol is carefully added on top of it using a dropper. Similarly, olive oil, milk, and ice are added in the same manner. Finally, a layer of aluminum, iron, copper, or gold is added on top of the ice. The resulting layered mixture will have a clear separation between each substance based on their density values.
The layers will be arranged in the following order from bottom to top: water, ethanol, olive oil, milk, ice, and the chosen metal. This experiment demonstrates the concept of density and how substances with different densities can be layered based on their relative weights. It also highlights the importance of understanding density in various scientific fields such as chemistry and physics.
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will mark u the brainliest. You have 1.5 moles each of hydrogen gas (H2) and sulfur hexafluoride gas (SF6). At STP, these gases will both occupy the exact same volume (33.6L). Will the gases have the same mass? Why or why not?
Answers
Answer:
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Explanation:
If these teams are pulling with the same amount of force what will happen?
The team with the green and orange shirts will win.
bo
The team with the yellow and red shirts will win.
They will not move and neither team will win.
Answers
Which stage of the cell cycle results in two identical cells?
mitosis
cytokinesis
interphase
metaphase
Answers
Answer:
B.
Explanation:
Give Me a simple definition for Acids.
Answers
Answer:
an acid is a substance which produces hydrogen ions as the only as the only positive ion when dissolved in water.
If excess ammonium sulfate reacts with 20.0g of calcium hydroxide how many liters of ammonia are produced at STP?
(NH4) 2SO4 + Ca (OH) 2 --> CaSO4 + NH3 + H20
Answers
If excess ammonium sulfate reacts with 20.0g of calcium hydroxide then liters of ammonia are produced at STP 0.081L
Ammonium sulphate is the organic solvent and the primary use of ammonium sulphate is as a fertilizer for alkaline soils
Here given reaction is
(NH₄)₂SO₄ + Ca(OH)₂ → CaSO₄ + NH₃ + H₂O
Here given data is
Calcium hydroxide = 20.0g
We have to find liters of ammonia are produced at STP =?
20.0g of (NH₄)₂SO₄ STP = ?
Then 20.0g of (NH₄)₂SO₄×1 mol/132g×0.54L/1 mol = 0.081L
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URGENT! What occurs during a chemical reaction. :)
A.) Atoms of two or more elements are destroyed.
B.) Atoms of two or more elements oppose one another.
C.) Atoms of two or more elements bond together.
D.) Atoms of two or more elements trade protons.
Answers
To what does habitat loss pose the greatest threat?
Responses
exotic species
agriculture
biodiversity
water supply
Answers
Answer:
animals
Explanation:
I think I remember this from a quiz I took so exotic species
What do many employers require of respiratory technician? Check all that apply.
-Basic life support certification
-A specialized respiratory certification
-A four year medical degree
-Certification from the national board of respiratory care
-Socialize training in pediatrics or geriatrics
Answers
Answer:
1 & 4
Explanation:
just got it right on edge
is iron sulfate ii ionic or covalent ?
Answers
Answer: It's ionic because there is no bond formed, and the atoms are ionized. Covalent bonds can form between metals, and ionic bonds can form between two non-metals.
Is freezing an endothermic or exothermic process? how do you know?.
Answers
Answer:
When water becomes a solid, it releases heat, warming up its surroundings. This makes freezing an exothermic reaction
Explanation: i think
Identify the bacteria that are responsible for turning nitrogen from the atmosphere into usable nitrogen for plants.
Answers
Rhizobium bacteria were soil microbes that have the ability to convert dissolved nitrogen from the atmosphere. These root nodules on woody plants contain rhizobium bacteria.
What kind of bacteria releases nitrogen into the air?The nitrogen cycle is finished by denitrification, which turns nitrate (NO3-) back into gaseous nitrogen (N2). The driving force behind this procedure is denitrifying microorganisms. These bacteria generate energy from nitrate rather than oxygen, which results in the release of nitrogen gas into the environment.
What three kinds of bacteria utilise nitrogen?Azotobacter, Bacillus, Clostridium, or Klebsiella species are a few instances that belong to this category of nitrogen-fixing bacteria. These organisms must acquire their own energy source, as was previously said. Typically, they do this by oxidising organic molecules generated by the other organisms or as a result of decomposition.
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Name and draw skeletal formula of all the structural isomers of C4 H10 O that are alcohols.
Answers
One of the isomers of C4H10O that is an alcohol is the 1-butanol or butyl alcohol:
Another of the alcohols that has the given formula is tert-butanol or tert-butyl alcohol:
The third isomer of C4H10O is 2-butanol:
And the last isomer is isobutanol or isobutyl alcohol:
Which process is a chemical change?
burning a match
boiling water
melting ice
breaking glass
Answers
Radio waves are used to transmit information on various channels. What is the wavelength of a radio wave having the frequency of 5.40 × 1010 Hz?
1. Analyze the Problem
ν = and c = Unknown: λ =
You know that because radio waves are part of the electromagnetic spectrum, their speed, frequency, and wavelength are related by the formula c = λν.
Answers
Answer:
5.56×10¯³ m
Explanation:
From the question given above, the following data were obtained:
Frequency (v) = 5.4×10¹⁰ Hz
Wavelength (λ) =?
The velocity of electromagnetic wave, frequency and wavelength are related according to the equation:
Velocity (c) = wavelength (λ) × frequency (v)
c = λv
With the above formula, the wavelength of the radio wave can be obtained as follow:
Frequency (v) = 5.4×10¹⁰ Hz
Wavelength (λ) =?
Velocity (c) = 3×10⁸ m/s
c = λv
3×10⁸ = λ × 5.4×10¹⁰
Divide both side by 5.4×10¹⁰
λ = 3×10⁸ / 5.4×10¹⁰
λ = 5.56×10¯³ m
Thus, wavelength of the radio wave is 5.56×10¯³ m
add or subtract the following measurements. be sure each answer you enter contains the correct number of significant digits. −4.520g1.3g
Answers
The significant digits are
4 significant digits (addition) = -3.220g
subtract: -5.820g, which has four significant digits.
The process for determining significant digitsTo calculate how many significant figures are in a number, use the three guidelines below:Non-zero digits are always significant. Notable zeros fall inside the range of two significant digits.The final zero or subsequent zeros only matter in the decimal part.What are some significant digits examples?Any pair of non-zero digits separated by a zero is significant. The number 108.0097, for instance, includes seven significant digits.Every zero that is both to the right and left of a digit that is not zero and the decimal point has no significance.The number 0.00798, for instance, contained three significant digits.learn more about significant digits here
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according to the arrhenius concept, if naoh were dissolved in water, it would act as
Answers
Answer:
base
Explanation:
The substance NaOH will be disassociated in ions of Na and OH.
Ahrrenius concept of base it's anything that dissolved in water produces OH.
What is the difference between intermolecular forces of attraction and covalent bonds and how do I know if its strong or weak
Answers
Answer:
An intermolecular force is the force of attraction or repulsion which act between neighboring particles (atoms, molecules, or ions). Whereas the covalent bonds are the interatomic linkage that results from the sharing of an electron pair between two atoms.
Intermolecular forces hold molecules together in a liquid or solid. Intermolecular forces are generally much weaker than covalent bonds.
Unknown # 41
Flame Test Color: Lilac
Addition of HCl(aq): NR (No reaction)
Addition of HCl(aq) and BaCl2(aq): NR (No reaction)
Addition of HNO3(aq) and AgNO3(aq): Yellow precipitate
What is the unknown ionic compound molecular formula?
Answers
Explanation:
Flame test colors:
Li+ = Crimson Red
Na+ = Bright Orange-Yellow
K+ = Lilac
Addition of nitric acid and silver nitrate (HNO3 and AgNO3),
Cl- = White precipitate
Br- = Creamy precipitate
I- = Yellow Precipitate
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How many electrons surround the
nucleus of an atom of Thallium?
Answers
Answer:
81
Explanation:
40 cm3 of acid were mixed with 60 cm3 of alkali in an insulated container. The average temperature of the two solutions before they were mixed was 19.5°C. The temperature after mixing was 27.5°C. Was this an exothermic or an endothermic reaction?
Answers
This was an exothermic reaction, as the temperature increased from 19.5°C to 27.5°C after mixing.
Exothermic reactionAn exothermic reaction is a chemical reaction that releases energy in the form of heat. This energy is released because the reactants have a higher energy content than the products.
As the reaction proceeds, the energy difference between the reactants and products is released as heat.
Examples of exothermic reactions include combustion, burning, oxidation, and some types of chemical reactions.
These reactions can be spontaneous, meaning they occur without any outside energy input.
Exothermic reactions are important in many fields, such as energy production and manufacturing, since they can provide a useful source of energy.
This indicates that energy was released as the two solutions mixed, resulting in an increase in temperature.
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Using the phase diagram for H2O what phase is water in at 1 atm pressure and -5C
Answers
The phase diagram of water depicts the behavior of water with respect to temperature and pressure, showing the physical states of water: solid, liquid, and gas, at different points on the diagram. It is also known as the pressure-temperature phase diagram
Water’s phase diagram has three phases, ice (solid), water (liquid), and steam (gas), which exist in equilibrium at the normal atmospheric pressure of one atmosphere (1 atm).At 1 atm pressure and -5°C, water is in a solid state, which is ice. The horizontal line on the diagram at 1 atm represents the normal atmospheric pressure on earth, while the vertical line at -5°C depicts the temperature point where the phase transition between water and ice occurs. The intersection of the horizontal and vertical lines indicates the phase of water at that specific temperature and pressure. When water is heated at 1 atm, its temperature increases until it reaches 100°C, where it boils and turns into steam (gas). Similarly, when water is cooled, its temperature decreases until it reaches 0°C, where it freezes and becomes ice (solid).When water is at 1 atm and at a temperature between 0°C and 100°C, it exists in a liquid state. If the temperature and pressure change, the physical state of water changes as well. Hence, the phase diagram of water helps us understand the behavior of water at different temperatures and pressures.
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How many seismograph stations are needed to use the S-P-method? Why?
Answers
a minimum of three seismograph stations are needed to find an earthquake's epicenter using the S-P time method.
Scientists use triangulation to find the epicenter of an earthquake. When seismic data is collected from at least three different locations, it can be used to determine the epicenter by where it intersects. ... Knowing this helps them calculate the distance from the epicenter to each seismograph.
Explanation:
following is a written and visual description of the hershey and chase experiment. complete the blank in step 1 as well as the two labels in the diagram.
Answers
Three phases made up Hershey and Chase's experiment: infecting, mixing, centrifugation .
What is an infection, for instance?An infection occurs when a germ damages a person after entering their body.The bacterium reproduces and establishes a colony These pathogenic tiny organisms are contagious and reproduce swiftly. Pathogens include, for instance, bacteria.
Why do infections occur?An infection happens when germs get into the body, grow there, and then start the body reacting .Three things must happen for an infection to occur: Source: Infectious (germ) agent habitats (e.g., sinks, surfaces, human skin) a vulnerable individual who serves as a germ entrance point.
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Please help me out with these questions please..
Both are in 1 picture:)
Answers
Answer:
1. B
2. C
Explanation: The law that the properties of the elements are periodic functions of their atomic numbers. And the second one is, most of the air we breathe is made of oxygen.
. At time t=0, an aluminum bar (thermal diffusivity k=0.86 ) of length Lcm with completely insulated lateral surfaces and constant thermal properties is removed from boiling water (uB=100 degrees Celsius). Do the following i), ii), iii) for each of the scenarios, a-d, below i) Write down the initial-boundary value problem. That is, the PDE along with any initial and boundary conditions. ii) Without solving for u(x,t), describe the temperature distribution in the bar as t→[infinity] based on physical intuition. iii) Find the solution as t→[infinity] by solving the appropriate steady state equation. a) The two ends of the bar are immediately immersed in a medium with constant temperature 10 degrees Celsius. b) The end at x=0 is immersed in a medium with temperature 0 degrees Celsius and the end at x=L is completely insulated.
Answers
(i) The initial-boundary value problem for the given scenarios are as follows:
a) Scenario a:
PDE: ∂u/∂t = k * ∂²u/∂x²
Initial condition: u(x, 0) = 100 (boiling water temperature)
Boundary conditions: u(0, t) = 10, u(L, t) = 10 (constant temperature at the ends)
b) Scenario b:
PDE: ∂u/∂t = k * ∂²u/∂x²
Initial condition: u(x, 0) = 100 (boiling water temperature)
Boundary conditions: u(0, t) = 0 (temperature at x=0), ∂u/∂x(L, t) = 0 (thermal insulation at x=L)
(iii) The solution for the temperature distribution as time approaches infinity can be found by solving the appropriate steady state equation.
What is the expected temperature distribution in the bar as time approaches infinity?(i) The initial-boundary value problem formulation states the partial differential equation (PDE) governing the temperature distribution in the aluminum bar, along with the initial condition and boundary conditions.
In scenario (a), both ends of the bar are immersed in a medium with a constant temperature of 10 degrees Celsius, while in scenario (b), the end at x=0 is immersed in a medium with temperature 0 degrees Celsius and the end at x=L is insulated.
(ii) As time approaches infinity, the temperature distribution in the bar tends to reach a steady state.
In scenario (a), the temperature throughout the bar will eventually approach a constant value of 10 degrees Celsius, since both ends are immersed in a medium with that temperature.
In scenario (b), the temperature at x=0 will approach 0 degrees Celsius, while the temperature at x=L will remain constant due to thermal insulation.
(iii) To find the solution as time approaches infinity, we need to solve the appropriate steady state equation.
In scenario (a), the steady state equation is ∂²u/∂x² = 0, which implies that the temperature gradient is zero throughout the bar, resulting in a constant temperature of 10 degrees Celsius.
In scenario (b), the steady state equation is ∂²u/∂x² = 0 with the boundary condition u(0) = 0, which implies a linear temperature distribution from 0 degrees Celsius at x=0 to a constant temperature at x=L due to insulation.
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A 67.0 mL portion of a 1.60 M solution is diluted to a total volume of 268 mL. A 134 mL portion of that solution is diluted by adding 131 mL of water. What is the final concentration
Answers
The final concentration of the 134 mL portion of the solution is 0.400 M.
First, we need to find the moles of solute present in the original solution: moles of solute = M × V = 1.60 M × 0.0670 L = 0.1072 mol. We can now use this value to find the new concentration of the solution after dilution: moles of solute = M × V ⇒ M = moles of solute / V. new concentration = moles of solute / Vtotal = 0.1072 mol / 0.268 L = 0.400 M.
Now we can find the moles of solute present in the 134 mL portion of the solution: moles of solute = M × V = 0.400 M × 0.134 L = 0.0536 mol. When this portion is diluted by adding 131 mL of water, the total volume becomes 265 mL. Therefore, the new concentration is moles of solute = M × V new concentration = moles of solute / Vtotal = 0.0536 mol / 0.265 L = 0.202 M or 0.200 M (rounded to three significant figures).
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3. What is the mass of 5 moles of Hydrogen sulfate?I
Answers
Answer:
490
98 for 1 mole, Hence for 5 moles 5 X 98 =490.
Explanation:
Brainliest please?
1. Convert these from plus-minus notation to significant figures notation.
a. 65.316 mL + 0.05 mL.
b. 5.2 cm + 0.1 cm
c. 1.8642 km ± 0.22 km
d. 16.8°C ±1°C
Answers
Answer: a. 65.37 mL
b. 5.3 cm
c. 2.08 km (plus) or 1.64 km (minus)
d. 18°C (plus) or 16°C (minus)
Explanation:
The way significant figures work when you're adding or subtracting, is you go to the answer with the least amount of decimal places. Take a. for example; you have 65.316 (3 places after the decimal) and 0.05 (2 places after the decimal place). Based off of this, you would round your answer to two places after the decimal. And when you have a whole number, like in d. you round to the nearest whole number, since there aren't any decimal places to round your answer to.
How did the Bronsted-Lowry acid-base theory clarify what Svante Arrhenius was not able to explain in his theory of acids and bases regarding ammonia?
Answers
Svante Arrhenius theory suggests that in order for a substance to release either H+ or OH- ions, it must contain that particular ion. However, this does not explain the weak base ammonia (NH3), In Bronsted-Lowry acid-base theory, acids are defined as proton donors; whereas bases are defined as proton acceptors.
What is ammonia?With the chemical formula NH3, ammonia is a nitrogen and hydrogen inorganic compound. Ammonia is a colorless gas with a strong, pungent odor.
It is a stable binary hydride and the most basic pnictogen hydride. In terms of biology, it is a typical nitrogenous waste, especially among aquatic organisms, and it significantly contributes to the nutritional requirements of terrestrial organisms by acting as a precursor to 45 percent of the world's food and fertilizers.
Approximately 70% of ammonia is used to create fertilizers, including urea and diammonium phosphate, in a variety of shapes and compositions. Additionally, pure ammonia is sprayed onto the ground.
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