We can arrange the given compound in order of increasing boiling point as CO2 <CH3Br <CH3OH <RbF.
The compound with the highest boiling point is RbF, since it has the strongest intermolecular force.
CH3OH, CH3Br can doesn't posses strong intermolecular force compare to RbF, and they can form hydrogen bond.
CO2 can form weak dispersion force and it's a non polar compound and it posses the boiling point.
What is boiling point?This is the temperature at whereby the vapor pressure of a liquid equals the pressure.
At this temperature, the liquid changes into a vapor and the weaker the force of attraction the lower the boiling point.
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When a soda is poured into a glass and the soda bubbles, is it the result of a chemical change? explain your answer?
The instrument that is commonly used to measure the intensity of radioactivity is called a _____.
Calculate the formula mass for the compound tin(IV) sulfate.
Identify the statement that correctly describes light and how it travels? (2 points)
Select one:
a. Light waves can travel in a vacuum and travel at a constant speed even if the light source is moving.
b. Light waves can travel in a vacuum and will travel faster if the light source is moving forward.
c. Light waves need a medium to travel, and they travel faster if the light source is moving forward.
d. Light waves need a medium to travel, and they travel at the same speed even if the light source is moving.
The light emitted by an incandescent element produces:
~a unique continuous spectrum
~an emission line spectrum
~a spectrum identical to the hydrogen atom
~a spectrum of one unique wavelength
Answer: an emission line spectrum
Explanation: An emission line spectrum is produced form the light emitted by the incandescent lamp.
Line Spectrum is produced when the electron that has been excited to the higher energy state levels moves between the molecular energy levels while returning to the ground state.
Incandescent lamp is the lam that generates electricity when electrical current runs through it.
Charcoal is primarily carbon. what mass of co2 is produced if you burn enough carbon (in the form of charcoal) to produce 4.60kj×102kj of heat? the balanced chemical equation is as follows:c(s)+o2(g)→co2(g),δh∘rxn=−393.5kj
The combustion of carbon in forms like charcoal to release a specific amount of heat, based on the chemical reaction and heat change, allows us to calculate the resulting mass of carbon dioxide. To produce 4.60x102 kJ heat, approximately 51.4 g of carbon dioxide would be generated.
Explanation:In the provided chemical reaction, C(s) + O₂(g) CO₂(g), with the heat change (ΔH°) being -393.5 kJ, we interpret that the combustion of one mole of carbon (charcoal form) releases 393.5 kJ of heat. We know that the heat release comes from the formation of carbon dioxide (CO2). So, for 4.60x102 kJ, the moles of CO2 produced can be calculated by using the ratio rule for mole and energy. So, the number of moles of CO2 produced = 4.60x102 kJ * (1 mole CO2/-393.5kJ) = 1.17 moles. The
mass of CO2
is the number of moles * molecular weight of CO2 = 1.17 mol * 44 g/mol = 51.4 g. Hence, the combustion of sufficient carbon (charcoal form) to produce 4.60x102 kJ of heat generates 51.4 g of carbon dioxide.
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Write orbital diagrams (boxes with arrows in them) to represent the electron configurations of carbon before and after sp hybridization.
The electron configuration of carbon atom in its ground state is 1s² 2s² 2p². After sp hybridization, one 2s electron gets excited to the 2p orbital forming four unpaired electrons ready for bonding. These form two sp hybrid orbitals, leaving the remaining two 2p orbitals with single electrons.
Explanation:The electron configuration for a carbon atom (C) in its ground state is 1s² 2s² 2p², represented by an orbital diagram with two arrows in the 1s box, two in the 2s, and two single arrows in two of the three 2p boxes, indicating paired and unpaired electrons respectively.
During sp hybridization, one of the 2s electrons gets excited and moves to the 2p orbital, leading to four unpaired electrons ready for bonding. These mix to form two sp orbitals. In the electron configuration diagram, the two sp hybrid orbitals would have a single electron each, leaving the remain two 2p orbitals also with single electrons. Remember, these are depicted as boxes, each with a single upward arrow.
The distinction between the carbon atom's electron configurations before and after sp hybridization is essential in understanding its bonding behaviour and the formation of diverse organic compounds.
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SELECT ALL THAT APPLY. Which of the following statements about Charles's law are true?
A. Real gases may be expected to deviate from Charles's law at high pressures.
B. Ideal gases may be expected to deviate from Charles's law at high pressures.
C. Real gases may be expected to deviate from Charles's law near the liquefaction temperature.
D. Ideal gases may be expected to deviate from Charles's law near the liquefaction temperature.
Answer is:
A. Real gases may be expected to deviate from Charles's law at high pressures.
C. Real gases may be expected to deviate from Charles's law near the liquefaction temperature.
At high pressure gas molecules are close to one another and near the liqueffaction temperature energy is very low.
Charles' Law (The Temperature-Volume Law) - the volume of a given amount of gas held at constant pressure is directly proportional to the Kelvin temperature:
V₁/T₁ = V₂/T₂.
When temperature goes down, the volume also goes down.
A sample of br2(g) takes 48.0 min to effuse through a membrane. how long would it take the same number of moles of ar(g) to effuse through the same membrane?
Using Graham's law of effusion, it can be calculated that it would take 24.0 minutes for the same number of moles of Argon gas to effuse through the same membrane as compared to Bromine gas.
Explanation:The question is asking how long it would take for an equal amount of argon gas to effuse compared to bromine gas. This is related to Graham's law of effusion, which says that the rate of effusion of a gas is inversely proportional to the square root of its molar mass.
Thus, in accordance with this law, the effusion rate of a gas is given by the formula: Rate = √(M2/M1), where M1 and M2 are the molar masses of the two gases involved. For Argon (Ar) and Bromine (Br2), their molar masses are 39.95 g/mol and approximately 159.8 g/mol respectively. Plugging these values into Graham's equation, the rate at which Argon effuses as compared to Bromine would be √(159.8 g/mol / 39.95 g/mol) = √(4) = 2. Given that Bromine takes 48.0 minutes to effuse, Argon, effusing at twice the rate, would take half the time - 48.0 minutes / 2 = 24.0 minutes to effuse through the same membrane.Learn more about Graham's Law of Effusion here:https://brainly.com/question/34146005
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Classify these atomic orbitals as sp, or d according to their shape.
s and p orbitals do not have sp or d designations, while d orbitals are classified as d based on their shape and angular momentum quantum number. sp orbitals are formed by hybridization and are not based solely on the shape of individual atomic orbitals.
Atomic orbitals are regions in space where electrons are likely to be found around an atomic nucleus. They have specific shapes associated with their quantum numbers, which describe their size, shape, and orientation. The classification of atomic orbitals as sp or d depends on their shape and the angular momentum quantum number, l.
s Orbitals: These are spherical in shape and have l = 0. They are associated with the azimuthal quantum number (angular momentum) and are not divided into subshells. In terms of classification, s orbitals are not denoted as sp or d.
p Orbitals: These are -shaped and come in sets of three, oriented along the x, y, and z axes. They have l = 1. P orbitals are not denoted as sp or d; they are simply labeled as px, py, and pz.
d Orbitals: These have complex, multi-lobed shapes with five different orientations. They have l = 2 and are further divided into subshells, which can be labeled as dxy, dxz, dyz, dx²-y², and dz².
sp Orbitals: These are hybrid orbitals formed by mixing one s orbital and one p orbital. They have a linear shape and are typically found in molecules with sp hybridization, such as linear molecules like BeH2 or CO2.
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Describe the preparation of 40 liters of 0.02 m phosphate buffer, ph 6.9
By following these steps, you can prepare 40 liters of 0.02 M phosphate buffer with a pH of 6.9 using solid Na3PO4 and 1M HCl:
Step 1: Calculate the amount of Na3PO4 required
Step 2: Prepare the Na3PO4 solution
Step 3: Calculate the amount of HCl required
Step 4: Adjust the pH
To prepare 40 liters of 0.02 M phosphate buffer solution with a pH of 6.9, starting from solid Na3PO4 and 1M HCl, we can follow these steps:
Step 1: Calculate the amount of Na3PO4 required
The phosphate buffer will be prepared using the following equilibrium reaction:
Na3PO4 + 3HCl → 3NaCl + H3PO4
We need to calculate the amount of Na3PO4 required to make a 0.02 M solution in 40 liters.
First, calculate the moles of phosphate ions required:
Moles of phosphate ions = Molarity × Volume
Moles of phosphate ions = 0.02 mol/L × 40 L = 0.8 moles
Since Na3PO4 dissociates into three moles of phosphate ions, the moles of Na3PO4 needed will be one-third of the moles of phosphate ions:
Moles of Na3PO4 = 0.8 moles / 3 = 0.2667 moles
Step 2: Prepare the Na3PO4 solution
Weigh out the calculated amount of Na3PO4 and dissolve it in water to make up the 40 liters of solution.
Step 3: Calculate the amount of HCl required
The pH of the buffer is adjusted using HCl. To achieve a pH of 6.9, we need to calculate the amount of 1M HCl needed.
Step 4: Adjust the pH
Add the calculated amount of 1M HCl to the Na3PO4 solution while monitoring the pH using a pH meter or pH paper. The pH should be adjusted to 6.9 by adding small amounts of HCl at a time and then checking the pH until the desired pH is reached.
By following these steps, you can prepare 40 liters of 0.02 M phosphate buffer with a pH of 6.9 using solid Na3PO4 and 1M HCl.
The probable question may be:
Describe the preparation of 40 liters of 0.02 M phosphate buffer, pH 6.9, starting from solid Na3PO4 and 1M HCl.
Retry: 1.Examine Record A. Use the three basic rules to figure out the ages of the layers. In Chart A, list the layers from youngest to oldest with the youngest layer in the first row.
Answer:
C, E, H, A, B, F, K, D, L, G, J, I.
Explanation:
Hello,
In this case we are dating each layer based on its deepness as the deeper the layer is, the farther back in time it is (older). In such a way, the youngest layer is C and henceforth by going down, we find older and older layers no matter if the layer is horizontal or diagonal, we just go down by straight line, therefore, from youngest to oldest, the order turn out into:
C, E, H, A, B, F, K, D, L, G, J, I.
Best regards.
which of the following identifies the number and location of protons in a lithium atom
A lithium atom always contains three protons located in its nucleus, defining its atomic number as 3, regardless of the isotope.
Explanation:The number and location of protons in a lithium atom is universally three within its nucleus. This constant feature defines the element lithium (Li) and gives it an atomic number of 3. Lithium atoms can, however, have different numbers of neutrons, resulting in isotopes with different mass numbers such as Lithium-6 (three neutrons) and Lithium-7 (four neutrons). Despite these differences, the number of protons remains constant at three, which is a characteristic trait of the lithium element.
What is the de Broglie wavelength (in meters) of a 45-g golf ball traveling at 72 m/s?
How much water must be added to 12.0 mL of 1.65 M LiCl to dilute the solution to 0.495 M LiCl?
To solve this problem, we use the formula:
M1 V1 = M2 V2
To calculate for the total final volume V2:
V2 = M1 V1 / M2
V2 = 1.65 M * 12 mL / 0.495 M
V2 = 40 mL
Since final volume is 40 mL so water needed is:
water volume = 40 mL – 12 mL
water volume = 28 mL
What are the major species in solution when solid ammonium bromate is dissolved in water?
The major species when ammonium bromate is dissolved in water are ammonium ions, bromate ions, hydronium ions, and ammonia.
When solid ammonium bromate is dissolved in water, the major species in solution are ammonium ions (NH₄⁺) and bromate ions (BrO₃⁻). In an aqueous solution, the ammonium ion is a weak acid, which can donate a proton to water, forming hydronium ions (H₃O⁺) and ammonia (NH₃), hence making the solution slightly acidic. The bromate ion is a stable species that does not further react in water. Therefore, the major species in solution are NH₄⁺, BrO₃⁻, H₃O⁺, and some unreacted NH₃.
why is it important to know a tornados velocity and not just its speed
The Lewis structure for ethylene, C2H4, is shown. How many valence electrons do the two carbon atoms in the molecule share with each other in the double bond?
the correct answer is 2
If 78.5 mol of an ideal gas occupies 40.5 l at 83.00 °c, what is the pressure of the gas?
Write the complete electron configuration for the common monatomic ion formed by the element calcium, ca.
The complete electron configuration for the common monatomic ion formed by calcium (Ca) is [Ar]4s².
Explanation:Calcium (Ca) is located in the second column of the s block. We would expect its electron configuration to end with 4s². The complete electron configuration for calcium is [Ar]4s². When calcium forms a monatomic ion, it loses its two valence electrons, resulting in a 2+ charge and an electron configuration of 1s²2s²2p⁶3s²3p⁶. The calcium ion (Ca²+) is therefore isoelectronic with the noble gas argon (Ar).
Household object that includes metal and why
Which forces involve nonpolar molecules?
hydrogen bonds and London dispersion forces
London dispersion forces and dipole-induced dipole forces
dipole-dipole forces and hydrogen bonds
dipole-induced dipole forces and dipole-dipole forces
A neutral atom of potassium (K) has an average mass of 39 amu and 19 electrons. How many neutrons does it have?
10
19
20
58
A neutral atom of potassium (K) has an average mass of 39 amu and 19 electrons. It has 20 neutrons. Thus, the correct option for this question is C.
What are Electrons?Electrons may be characterized as the type of subatomic particles which are consistently revolving within the orbitals around the nucleus. These subatomic particles are negatively charged in nature. J.J. Thomson is known as the discoverer of these subatomic particles.
It is clearly mentioned in the question that an atom is neutral which means the number of positively charged particles (protons) is equal to the number of negatively charged particles (electrons). So, the number of protons is also 19.
Now, the number of neutrons is determined by the following formula:
The number of neutrons = Atomic mass - Number of protons.
= 39 - 19 = 20.
Therefore, a neutral atom of potassium (K) has an average mass of 39 amu and 19 electrons. It has 20 neutrons. Thus, the correct option for this question is C.
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What is the process that changes the composition of rocks by dissolving them called?
Assuming ideal gas behavior, what is the pressure in atm exerted by 1.57 mol Cl2(g) confined to a volume of 1.50 L at 273K?
The formula for ideal gas law is:
P V = n R T
where
P is pressure = ?
V is volume = 1.50 L
n is number of moles = 1.57 mol
R is gas constant = 0.08205746 L atm / mol K
T is temperature = 273 K
P = 1.57 mol * 0.08205746 L atm / mol K * 273 K / 1.50 L
P = 23.45 atm
If 32.0 g of MgSO4⋅7H2O is thoroughly heated, what mass of anhydrous magnesium sulfate will remain?
After heating, approximately 15.65 g of anhydrous magnesium sulfate will remain from the original 32.0 g of magnesium sulfate heptahydrate.
Identify the Molar Masses:
Molar mass of MgSO₄ = 24.31 (Mg) + 32.07 (S) + 4 × 16.00 (O) = 120.37 g/molMolar mass of 7H₂O = 7 × 18.02 (H₂O) = 126.14 g/molTherefore, the molar mass of MgSO₄·7H₂O = 120.37 g/mol + 126.14 g/mol = 246.51 g/molCalculate the Moles of MgSO₄·7H₂O:
Moles of MgSO₄·7H₂O =Determine the Moles of Anhydrous MgSO₄:
Upon heating, all the water is removed, leaving anhydrous MgSO₄.The moles of anhydrous MgSO₄ are equal to the moles of MgSO₄·7H₂O because heating just removes water.Calculate the Mass of Anhydrous MgSO₄:
Mass of MgSO₄ = Moles × Molar MassWhich of the following represents a chemical change?
Bending a wire
Freezing of water
Fireworks exploding
Melting of a wax candle
Explosion of fireworks represents a chemical change because explosion causes chemical reaction due to which chemical properties change.
How do chemical changes occur?Chemical changes occur when chemical reactions take place.During chemical reactions, bonds between atoms break due to which properties change.
Bending of wire only causes change in physical property that is shape and there is no change in chemical properties or constituents of wire.Freezing of water changes the state of water to solid but does not change it's properties.
Melting of wax candle only changes the state of candle from solid to molten form it does not alter its chemical properties.During explosion of fireworks there is chemical change taking place along with which large amount of energy is released.
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What are the benefits of stationary weather collection
When chromium chloride crcl2 is dissolved in water the temperature of the water decreases answers?
which has prokaryotic cells
Prokaryotic cells are found in bacteria and archaea.
What is Prokaryotic cellsProkaryotic cells are a type of cell that lacks a nucleus and other membrane-bound organelles. They are found in bacteria and archaea, which are two domains of microorganisms.
Prokaryotic cells are structurally simpler compared to eukaryotic cells, which are found in plants, animals, fungi, and protists.
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