Answer:
2.7
Explanation:
ch3cl would you expect the following compound to have a dipole moment? if the molecule has a dipole moment, specify its direction. select the single best answer. ch3cl the dipole moment is oriented from the h atoms towards the cl atom. the dipole moment is oriented from the cl atom towards the h atoms. one specific direction of the dipole moment does not exist. the molecule has no dipole moment. ch3cl
CH3Cl would have a dipole moment, oriented from the H atoms towards the Cl atom.
This is because the Cl atom is more electronegative than the H atoms, so the electrons in the covalent bond between them will be pulled more towards the Cl atom. This creates an uneven distribution of charge and a net dipole moment.
CH3Cl, also known as chloromethane or methyl chloride, is a colorless, flammable gas with a sweet odor. It is a hydrocarbon, meaning it consists of hydrogen and carbon atoms, and is classified as a haloalkane due to the presence of a chlorine atom. CH3Cl is used in a variety of industrial processes, including as a refrigerant and a propellant. It is also used to produce other compounds, such as acetic acid and methylene chloride.
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Provide a structure for the compound C6H16N2
using the given information.
IR: 3281 cm−1
H1
NMR: 1.1 (8, t, =7 Hz), 2.66 (4, q, =7 Hz), 2.83 (4, s).
(Hint: The triplet at 1.1
conceals another broad resonance that contributes to the integral.)
Draw the structure for C6H16N2
a candle is lit with a match and places in a glass jar. classify the observations as physical or chemical changes:
-the candle wax melts
-the candle wick burns
-the glass jar gets hot
-soot is deposited on the inside of the ja
The melting of the candle wax and the burning of the candle wick are physical changes, as the molecules of the wax and wick have been rearranged and heated but their chemical composition has not changed.
The glass jar getting hot and the soot being deposited on the inside of the jar are both chemical changes, as the molecules of the glass and the soot have been chemically altered.
Chemical changes occur when a substance undergoes a chemical reaction, resulting in the formation of new substances.
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Convert 27.8 L to cm^3
Answer:
27800
Explanation:
1litre =1000cm3
27.8 ×1000
=27800cm3
Which of the following statements about subatomic particles are true? I. Protons and neutrons have charges of opposite signs but the same magnitude, II. Protons and neutrons have about the same mass. III. A neutral atom always has the same number of neutrons and electrons.
A. I only
B. II only
C. III only
D. II AND III
E. I AND II
III. A neutral atom always has the same number of neutrons and electrons.[TRUE]
ABOUT ATOMOne of the particles that make up the atomic nucleus is the neutron. The atom itself is a basic unit of matter consisting of an atomic nucleus and an electron cloud. Electrons are the part of the atom that is negatively charged.
While the part of the atom that is positively charged is the proton. One of the particles that make up the atomic nucleus is the proton. Protons aren't the only particles that make up the atomic nucleus. In addition to protons, the particles that make up the atomic nucleus are neutrons which are neutral.
In other words, the particles that make up the atomic nucleus are protons and neutrons. However, not every atom has a neutron particle as one of the particles that make it up. Hydrogen-1 atomic nucleus, no neutrons in it.
From this explanation it can be seen that the atom is a material composed of electrons and atomic nuclei. While the particles that make up the atomic nucleus are protons and neutrons.
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which situation is in equilibrium
Answer: A) The amount of air in a room never changes.
What is equilibrium?It is a state of balance between opposing forces or actions that is either static (as in a body acted on by forces whose resultant is zero) or dynamic (as in a reversible chemical reaction when the rates of reaction in both directions are equal).
Economic equilibrium is a condition or state in which economic forces are balanced. In effect, economic variables remain unchanged from their equilibrium values in the absence of external influences.
a) The amount of air in a room never changes: the amount of air does not change as the amount of air leaving the room is same as that of the air entering the room and hence the reaction is in equilibrium.
b) The amount of water in a cup decreases as it evaporates: The amount of water is decreasing that means the reaction is taking place in one direction and hence the reaction is not in equilibrium.
c) The percentage of nitrogen gas in a room decreases steadily: the amount decreases that means the reaction is taking place in one direction and hence the reaction is not in equilibrium.
d) A blade of grass grows taller : the plant gets taller that means the reaction is taking place in one direction and hence the reaction is not in equilibrium
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Aqueous lead (II) nitrate, Pb(NO3)2 undergoes a double displacement reaction with aqueous sodium chloride, NaCl, in which a precipitate forms. If the precipitate contains lead, write the balanced chemical equation for this reaction. Be sure to include the states of each of the reactants and products.
Answer:
Pb(NO₃)₂(aq) + 2NaCl(aq) → PbCl₂(s)↓ + 2NaNO₃(aq)
Explanation:
The precipitate formed is PbCl₂, which contains lead in it
∴ Pb(NO₃)₂(aq) + 2NaCl(aq) → PbCl₂(s)↓ + 2NaNO₃(aq)
PLEASE HELP MY TEACHER SAID I NEED TO SHOW MY WORK I WILL GIVE YOU AS MANY POINTS AS I POSSIBLY CAN MY TEST IS TOMORROW MORNING HELP ME. THIS IS GAS LAWS CHEMISTRY 10TH GRADE LEVEL HONORS.
The volume of the gas at 40 degrees C, given that it's volume was 60 L at 301.5 K is 62.3 L
How do I determine the volume at 40 degrees C?From the question given above, the following data were obtained:
Initial volume (V₁) = 60 LitersInitial temperature (T₁) = 301.5 KNew temperature (T₂) = 40 degree C = 40 + 273 = 313 KNew volume (V₂) =?Using Charles' law equation, we can obtain the volume of the gas at 40 degrees C as illustrated below:
V₁ / T₁ = V₂ / T₂
60 / 301.5 = V₂ / 313
Cross multiply
301.5 × V₂ = 60 × 313
301.5 × V₂ = 18780
Divide both side by 301.5
V₂ = 18780 / 301.5
V₂ = 62.3 L
Thus, we can conclude from the above calculation that the new volume of the gas is 62.3 L
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The new volume of the gas is 62.3 L.
What is the volume of the gas?We have to use the Charles law here. In this law, the volume of a gas is directly proportional to its temperature (in kelvins), provided that the pressure and number of moles of the gas remain constant. It can be expressed as: V/T = k, where V is the volume, T is the temperature in kelvins, and k is a constant.
We have that;
V1/T1 = V2/T2
V1 = initial volume]
V2 = final volume
T1 = initial temperature
T2 = final temperature
Then;
V1T2 = V2T1
V 2 = V1T2 /T1
V2 = 60 * 313/301.5
V2 = 62.3 L
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Heat transfer to Earth Essential Question: How does energy transfer from the Sun to Earth and the atmosphere? What affects the climate
When the energy from sun strikes the Earth, some of these are reflected back into the universe by clouds, most of it is absorbed by the atmosphere, and a portion is absorbed at the surface.
How sun's energy affects atmosphere?The Sun is the sole source of energy for the Earth's climate system. The distribution of solar heating across the planet produces global wind patterns and contributes to the formation of clouds, storms, and rainfall.Three processes transfer energy in the atmosphere, ocean, and Earth's interior system: convection, conduction, and radiation. These processes can all take place at the same time on a small or large scale.All of the Sun's energy that reaches the Earth arrives as solar radiation, which is part of a large collection of energy known as the electromagnetic radiation spectrum. Visible light, ultraviolet light, infrared light, radio waves, X-rays, and gamma rays are all types of solar radiation.To learn more about sun's energy refer to :
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PLS HELPPP ITS DUE VRY SOON
In a molecule or covalent bonding, elements having Octet electrons to obtain the stability with eight electrons.
One element that does not follow the octet rule is hydrogen. For stability only require stable electrons.
A molecule can present covalent bond but can be chemical.
What is a covalent bond?Covalent bonding is a type of chemical bonding that occurs when two or more atoms share electrons in order to form a strong bond between them. This type of bond is formed when atoms share electrons in a way that gives each atom a full outer shell of electrons, known as the octet rule. This means that all atoms in the bond must have a total of eight electrons in their outermost shell. The atoms involved in a covalent bond form a molecule, which is held together by the shared electrons.
The octet rule is a guideline that states that atoms will bond in a way that allows them to have a full outer shell of electrons. This means that they must share electrons in order to reach a total of eight electrons in their outermost shell. The sharing of electrons creates a strong bond between the atoms that form a molecule. The sharing of electrons also results in the creation of a covalent bond.
However, not all elements follow the octet rule. For example, hydrogen only requires two electrons to reach a stable state, so it does not need to share electrons in order to reach the octet rule. Therefore, a hydrogen molecule will not have a covalent bond.
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which of the following describes a property of pure water? a. more dense as a solid b. molecules are noncohesive c. changes temperature rapidly
d. acidic ph e. can hold many molecules in solution
The statement that describes the property of pure water is that water can hold many molecules in solution. That is option E.
What is water molecules?Water molecule is a chemical compound that is made up of elements such as oxygen and hydrogen which are chemically combined together.
The physical and chemical properties of water include the following:
odourless,tasteless,colourless,high polarity, high specific heat, high heat of vaporization, low density as a solid, and attraction to other polar molecules.Water can hold many molecules in solution because they have high polarity.
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A farmer applies 1305 kg of a fertilizer that contains 10.0% nitrogen to his fields each year. Fifteen percent (15.0%) of the fertilizer washes into a river that runs through the farm.
If the river flows at an average rate of 0.370 cubic feet per second, what is the additional concentration of nitrogen (expressed in milligrams of nitrogen per liter) in the river water due to the farmer's fertilizer each year?
Answer:
0.139
Explanation:
Briefly explain what solubility is, and list some of the factors that affect solubility.
3. Does a polar compound dissolve in water? If so, explain how it occurs.
4. Does a non-polar compound dissolve in water? If not, explain why it does not dissolve.
At a given temperature, solubility is the maximum amount of a substance that will dissolve in a given amount of solvent. Temperature and pressure are two direct factors that influence solubility. Temperature influences the solubility of both solids and gases, whereas pressure influences only the solubility of gases.
What are polar compound ?Polar molecules primarily attract water molecules via hydrogen bonding. They successfully compete with hydrogen bonds between water molecules, making them easily soluble in water.
Because nonpolar molecules lack regions of partial positive or partial negative charge, they are not electrostatically attracted to water molecules. When nonpolar substances are added to water, they remain separate and form layers or droplets rather than dissolving.
Thus, If molecules are non-polar, this means there are no dipoles or entire charges on the atoms in the compound.
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be able to recall what functional groups are on the side chains of the various amino acids and from there predict the properties of the side chain.
The alcohols, amides, and thiols are usually the functional groups of side chains. These are acidic or basic amino acids. The side chains contain heteroatoms that are capable of forming permanent dipoles within the R-group
The naturally-occurring amino acids contain an e alpha-carbon, an amino, carboxylic acid, and an R group. The R group side chains may be either nonpolar, polar and uncharged, or charged, depending on the functional group, the pH.
Others contain polar uncharged functional groups such as alcohols, amides, and thiols. A few amino acids are basic or acidic (carboxylic acid functional groups).
The side chains contain heteroatoms (O, S, or N) that are capable of forming permanent dipoles within the R-group.
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Help Asha balance the following equation by completing the equation with the correct numbers:__H2 + __O2equation __H2O
Answer: 2 H₂ + O₂ ⇒ 2 H₂O
Explanation:
H₂ + O₂ ⇒ H₂O
There needs to be the same amount of each atom on both sides of the equation.
Step 1
There are 2 oxygen atoms on the left side of the equation and 1 oxygen atom on the right side of the equation.
Place a 2 in front of H₂O on the right side of the equation to balance the oxygen atoms.
H₂ + O₂ ⇒ 2 H₂O
Now the oxygen atoms are balanced, with 2 on each side of the equation.
Step 2
H₂ + O₂ ⇒ 2 H₂O
There are 2 hydrogen atoms on the left side of the equation and 4 hydrogen atoms on the right side of the equation (2 x 2 = 4).
Place a 2 in front of H₂ on the left side of the equation.
2 H₂ + O₂ ⇒ 2 H₂O
Now the hydrogen atoms are balanced.
The entire equation is balanced because there are equal numbers of each atom on both sides of the equation.
determine the solubility of following samples in water by adding a few milligrams to about 10ml of water. Record your observations in a tabular form
Each functional group has a particular set of chemical properties that it to be identified.
What is meant by determination of solubility ?The maximum amount of solute that can dissolve in a known quantity of solvent at a certain temperature is its solubility.
The solubility of the compound is determined as the concentration of unionized compound in solution when the measured pH slope is interpolated to zero.
These properties can be demonstrated by observing solubility behavior, while others can be in chemical reactions that are accompanied by color changes, precipitation formation, or other visible affects.
According to the presence of their functional group, organic compounds can be classified in different families and class.
The types of compounds soluble in a particular solvent are summarized on the following:
Water Soluble Compounds
5% Sodium Hydroxide Soluble Compounds
5% Sodium Bicarbonate Soluble Compounds
5% Hydrochloric Acid Soluble Compounds
96% Sulfuric Acid Soluble Compounds
Solubility of Amphoteric Compounds
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0.590 m aqueous solution freezes at -2.90 °C, what is the van't Hoff factor
The freezing point depression of an aqueous solution is directly proportional to the concentration of solute particles. This relationship is described by the equation:
ΔTf = Kf x molality
where ΔTf is the change in freezing point, Kf is the freezing point depression constant for water, and molality is the concentration of solute particles in the solution.
The Van't Hoff factor (i) is the ratio of the number of solute particles in a solution to the number of solute particles in an ideal solution. In this case, the Van't Hoff factor can be calculated using the freezing point depression:
i = (ΔTf / (Kf x molality)) + 1
Given that the freezing point of the solution is -2.90 °C, the freezing point depression constant for water is 1.86 °C/m, and the molality of the solution is (mass of solute / mass of solvent) = (0.590 g / 1000 g) = 0.00059 m, we can calculate the Van't Hoff factor as:
i = (-2.90 / (1.86 x 0.00059)) + 1
i = 3
So, the Van't Hoff factor for this solution is 3, which means that for each solute particle in the solution, there are 3 solute particles in an ideal solution.
Red gold is a gold‑copper alloy used to make jewelry. A piece of jewelry made of red gold weighs 7.74 g and has a volume of 0.553 cm3. Gold has a density of 19.3 g/cm3 and copper has a density of 8.96 g/cm3. Calculate the percentage by mass of each metal in the jewelry. Assume the total volume of the jewelry is the sum of the volumes of the two metals it contains.
Pure gold is defined as having 24 carats. When mixed in an alloy, the carats of gold are given as a percentage of this value. For example, a piece of jewelry made with 50% gold has 12 carats. State the purity of this piece of red gold jewelry in carats.
The percentage by mass of each metal in the jewelry is given as :
The percentage by mass of gold is : (mass of gold / total mass of jewelry) x 100% = (10.65 g / 7.74 g) x 100% = 137.5%
and the percentage by mass of copper is : (mass of copper / total mass of jewelry) x 100% = (4.91 g / 7.74 g) x 100% = 63.5%
Question 2
The piece of red gold jewelry has a purity of : (137.5%) x 24 = 33 carats
What is meant by percentage by mass?percentage by mass is described as a way of expressing a concentration or describing the component in a particular mixture.
We know that the piece of red gold jewelry contains 137.5% gold and 63.5% copper by mass.
To calculate the carats, we will use the formula:
carats = (percentage of gold in alloy) x 24
Therefor, the piece of red gold jewelry has a purity of : (137.5%) x 24 = 33 carats.
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use this answer to explain the number of decimal places allowed in a volume measire with a 25ml buret
After the water is delivered, stop the flask to stop the water from evaporating before the mass of the water can be calculated. To the nearest 0.1 mg, weigh the 25 mL of water in the stoppered flask. A minimum of three repetitions should be used to calibrate. Calibration should be done independently by each lab partner.
How do you calibrate a 25 mL volumetric flask?A 25 mL pipette needs to be calibrated. By adding deionized water above the mark and letting it drain, you can make sure the pipette is clean. On the side walls, there shouldn't be any water traces. It is clear that your pipette is unclean if there are such drips present. It is necessary to clean your pipette if it is unclean. Before thoroughly cleaning with deionized water, rinse with soapy water first. After cleaning, if the pipette is still filthy, take it to the pharmacy to be exchanged for a new one.When using a pipette, remember these crucial pointers:Fill it well past the mark but keep the bulb from going inside when you add it. You'll have the most time to use your finger to seal the bulb after doing so.Remove the bulb from the pipette as soon as it is full, then use your finger to swiftly halt the water flow (index finger or thumb work best for most people). To drain a small amount of water until the meniscus just touches the line, use a twisting or rocking motion.Attempt not to force the bulb too firmly onto the pipette. There is only a seal to be made, and this only requires a small amount of overlap. You can transfer data with your finger more easily as a result.Your pipette is a transfer pipette, which means that it is calibrated "to deliver" (TD) rather than "to contain" (TC). Under normal circumstances, a TD pipette's tip shouldn't have any liquid left in it.The temperature of the water can be altered via the pipette's walls with just the heat from your fingertips. Because of this, avoid making direct contact with the pipette below the water line.To Learn more About stoppered flask Refer To:
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calculate the inital tempature of 20 grams of pure carbon graphite was added to 60 grams of pute water at 20°c in a calorimiter the final tempature wss found to be 24°c the sorcific heay capacity of carbon graphite is .709j/g°c and that of water is 4.18j/g°c assume constant pressure and no added heat loss to the calorimiter nor surroundings
Answer:
The initial temperature of the carbon graphite before it was added to the water was 31.69°C.
Explanation:
To calculate the initial temperature, we need to use the formula for heat:
Heat = Specific heat capacity x mass x change in temperature
The heat absorbed by the water is:
Heat absorbed by water = 4.18 J/g°C x 60 g x (24°C - 20°C) = 10,212.8 J
The heat absorbed by the carbon graphite is:
Heat absorbed by carbon graphite = 0.709 J/g°C x 20 g x (Tinitial - 20°C) = 1418.Tinitial - 28360
Since heat is conserved, the heat absorbed by the carbon graphite is equal to the heat absorbed by the water:
1418.Tinitial - 28360 = 10,212.8 J
Tinitial = (10,212.8 + 28360) / 1418 = 31.69°C
The initial temperature of the carbon graphite before it was added to the water was 31.69°C.
A piece of cardboard is 12.0 cm long, 6.3 cm wide and 0.75 millimeters thick. What is the volume of this piece of cardboard in cubic meters
Answer:
5.67 cm^2
Explanation:
Is the following compound aromatic, non-aromatic, or anti-aromatic?
Answer:
Non-aromatic
Explanation:
The compound clearly is not cyclic, thus can not be considered amongst compounds that are aromatic or semi-aromatic.
Hence, it should be non-aromatic.
The volumetric pipet is labeled 10.00 ± 0.02 mL. What does that mean ?
Answer:
This means that the volume of the liquid the pipet can deliver is 10 mL with a tolerance of 0.02 mL. The tolerance is based on whether the actual volume is within 0.02 mL of 10 mL.
Explanation:
10 mL - 0.02 mL = 9.98 mL
10 mL - 0.02 mL = 10.02 mL
The volume of the liquid is between 9.98 and 10.02 mL.
While cooking you burn 5x1026 atoms of carbon. How many mole’s of carbon you burned? (Show work pls)
Considering the definition of Avogadro's Number, while cooking you burn 5×10²⁶ atoms of carbon, you burned 830.15 moles of carbon.
Avogadro's NumberAvogadro's number refers to the number of elementary entities (ie, atoms, electrons, ions, molecules) that exist in one mole of any substance.
Avogadro's number is currently defined as the number of atoms in 12 grams of carbon-12 and its known approximate value is 6.023×10²³ particles per mole.
Moles of carbonYou can apply the following rule of three: if 6.023×10²³ atoms are contained in 1 mole of carbon, then 5×10²⁶ atoms are contained in how many moles of carbon?
amount of moles of carbon= (5×10²⁶ atoms × 1 mole)÷ 6.023×10²³ atoms
amount of moles of carbon= 830.15 moles
Finally, you burned 830.15 moles of carbon.
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a 12.6g piece of metal is heated at 287 degrees celcius and dropped into 86.0g of water at 26.0 degrees celcius. the metal and water come to the same temperature at 57.7 degrees celcius. what is the specific heat of the metal?
A 12.6g piece of metal is heated at 287 degrees Celsius and dropped into 86.0g of water at 26.0 degrees celcius. the metal and water come to the same temperature at 57.7 degrees celcius. Therefore, the specific heat of the metal is 0.43J/gK.
What is specific heat?
The quantity of heat energy needed to increase a substance's temperature per unit of mass is known as specific heat capacity. A material's specific heat capacity is a physical characteristic.
Because its value is inversely correlated with the magnitude of the system under study, it is also an illustration of an extended feature.
Heat lost by the metal = Heat gained by the water and colorimeter system
mCΔT=(M+m)CT
12.6g ×C×110=(150+25)×4.186×13
C=(175×4.186×13)/(110×200)=0.43J/gK
Therefore, the specific heat of the metal is 0.43J/gK.
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The following are steps in an investigation into electrically charged objects.
Step #1: Blow up a balloon.
Step #2: Rub the balloon against your hair.
Step #3: Rub a plastic fork against your hair.
Step #4: Bring the two objects together and observe what happens.
Which steps are required to charge the objects? (2 points)
a
Steps #1 and #2
b
Steps #2 and #3
c
Steps #3 and #4
d
Steps #1 and #4
b. Steps #2 and #3
Step #1: Blowing up a balloon is not necessary to charge the objects, as it does not involve any rubbing or contact with other materials.
Step #2: Rubbing the balloon against your hair is necessary to charge the balloon.
Step #3: Rubbing a plastic fork against your hair is necessary to charge the fork.
Step #4: Bringing the two objects together and observing what happens is not necessary to charge the objects, but it is necessary to observe the effects of the charges on the objects.
how many atoms are in 4.5x1023 formula units of KMnO4
Answer:
4.5 x 10^23 formula units of KMnO4 contains 4.5 x 10^23 x (1 K + 1 Mn + 4 O) = 4.5 x 10^23 x 6 = 2.7 x 10^24 atoms.
From the given Lewis structure and what you know about VSEPR theory, identify the shape of the molecule.
trigonal pyramidal
see-saw
linear
bent
tetrahedral
trigonal planar
trigonal bipyramidal
square planar
square pyramidal
T-shaped
octahedral
Explanation:
square pyramidal
T-shaped
octahedral
A group of engineers has created a biodome filled with air, plants, and animals. No material can get in or out, but sunlight can get in during the daytime.
The walls of the biodome are made of a material that absorbs and locks away carbon dioxide from the air so it is not available to the living things inside. What do you predict will happen to carbon in the air over time? How could this affect the living things in the dome? Explain your thinking.
Trapping carbon dioxide inside will make the inner field cool because the heat energy absorbed by carbon dioxide is not available inside.
What are green house gases ?Green gases are gases which are capable of intense absorption of heat energy that is radiating out from the earth surface. Therefore, the heat energy is trapped in the atmosphere itself and make the surroundings warmer.
The presence of green house gases will raise global warming which in turn affects the ecosystems worsely and melts the snow in polar regions. A building with walls capable of trapping these gases and locked there make the inner part cooler are called green houses.
Thus, the unavailability of carbons dioxide affect the biome there especially for plants because, in the absence of carbon dioxide, photosynthesis does not takes place.
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Which of the following are the major charge carriers involved in the conduction of electricity in neurons? Ions
In neurons, ions are the main charge carriers involved in the conduction of electricity.
In neurons, potassium ions are maintained at high concentrations inside the cell, whereas sodium ions are maintained outside the cell. As potassium and sodium leakage channels exist in the cell, they allow these two cations to diffuse down their concentration gradients. The principal ions involved in an action potential are sodium and potassium cations; sodium ions enter the cell, and potassium ions leave, restoring equilibrium. The membrane voltage changes drastically when only a few ions cross the membrane.
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