which pair of elements is more likely to have similar propperties. two elements in the same group or period?
Answers
A group's elements have similar chemical characteristics, but their chemical qualities change throughout time. This is due to the fact that the chemical characteristics are determined by the number of valence electrons.
Which two components have the most in common?When two elements have the same number of valence electrons, their chemical characteristics are likely to be identical. Elements in the same column of the Periodic Table have the same number of valence electrons.
Because they share the same valence shell electron configuration, elements in the same group exhibit comparable chemical characteristics.
The valence electrons of elements in the same group are the same. As a result, elements in the same group have physical and chemical characteristics that are comparable.
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Related Questions
Calculate the mass of water produced when 7. 92 g of butane reacts with excess oxygen
Answers
The mass of water produced when 7.92 g of butane reacts with excess oxygen is approximately 24.6 grams.
The balanced chemical equation for the combustion of butane with oxygen is:
C4H10 + 13O2 -> 4CO2 + 10H2O
we can calculate the number of moles and then use the stoichiometry of the reaction to find the mass of water produced.
Firstly convert the mass of butane to moles:
moles = mass / molar mass
moles = 7.92 g / 58.12 g/mol = 0.1364 moles
Next, we'll use the stoichiometry of the reaction to find the no. of moles of water produced:
moles of water = 0.1364 moles * 10 moles of water / 1 mole of butane
moles of water = 1.364 moles
Finally, we'll convert the number of moles of water to mass:
mass = moles * molar mass
mass = 1.364 moles * 18.015 g/mol = 24.6 g
So, the mass of water produced when 7.92 g of butane reacts with excess oxygen is approximately 24.6 grams.
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The parts that are either directly or indirectly related to each other in a system are known as what?
A) the flow
B) the boundary
C) the components
D) the input
Answers
Answer:
C) the components
Explanation:
The term component is referred to as the distinctively recognizable part, piece, of a system that is required to complete a function, in that particular system. Moreover, it carries out a distinguishable and necessary function in the operation of a specific system. For example, a computer has a number of components that make it whole, and the most essential of them is the Central Processing Unit.
Answer:
c) the components
Explanation:
I took the quiz
A sample of krypton gas in a container of volume 1.90 L exerts a pressure of 0.553 atm at 21°C. How many moles of gas are present?
Answers
Answer:
0.064 moles
Explanation:
First, we need to convert the temperature in Kelvin, which can be done by adding 273 to the temperature in Celsius. So the temperature in Kelvin is 294 K. We can now use the Ideal Gas Law, PV = nRT, to solve for the number of moles, n. Rearranging the equation gives us n = PV/RT. Plugging in our values gives us n = (0.553 atm)(1.90 L)/[(0.0821 L·atm/K·mol)(294 K)] = 0.064 mol. Therefore, there are 0.064 moles of krypton gas present in the container.
which of the following alkyl halides cannot be used as an electrophile in a friedel-crafts alkylation?
Answers
The alkyl halide that cannot be used as an electrophile in a Friedel-Crafts alkylation is option C) 2-chloropropane.
Friedel-Crafts alkylation is a reaction in which an alkyl group is introduced onto an aromatic ring. However, certain alkyl halides may not be suitable for this reaction due to their reactivity or structural constraints.
Option A) 1-chlorobutane: This alkyl halide can be used as an electrophile in the Friedel-Crafts alkylation reaction.
Option B) 1-bromobutane: This alkyl halide can be used as an electrophile in the Friedel-Crafts alkylation reaction.
Option C) 2-chloropropane: This alkyl halide cannot be used as an electrophile in the Friedel-Crafts alkylation reaction. It is a primary alkyl halide, and primary alkyl halides tend to undergo side reactions, such as elimination, rather than alkylation.
Option D) 2-bromopropane: This alkyl halide can be used as an electrophile in the Friedel-Crafts alkylation reaction.
Therefore, the correct answer is option C) 2-chloropropane.
""
which of the following alkyl halides cannot be used as an electrophile in a friedel-crafts alkylation?
A) 1-chlorobutane
B) 1-bromobutane
C) 2-chloropropane
D) 2-bromopropane
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a solution contains 5 grams of glucose per 100 milliliters. each mole of glucose weighs 180 grams. how many moles are there in 200 milliliters of the glucose solution?
Answers
0.056 moles are there in 200 milliliters of the glucose solution if each glucose weighs 180 grams.
For dimensional analysis calculations regarding a solution, concentration is necessary.
A solution contains 5 grams of glucose per 100 milliliters. each mole of glucose weighs 180 grams.
mass= concentration / volume in liter
= ( 5 grams/ 1000 ml) * 200 ml
= 10 grams.
The calculated mass in grams, we will use the molar mass of glucose 180 grams/mole to determine the number of moles present in 200 mL of the glucose solution. The molar mass of a substance is defined as the mass of 1 mole of that substance. It is expressed in grams per mole.
moles = mass in grams / molar mass
= 10 grams / 180 g/ mole
= 0.056 mole
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How many moles of gas are contained in an ideal gas which occupies a volume of 15dm^-3 at 0°C and 1 atmosphere (R=0•082dm^3/atm/k/mole). If the gas is Carbon dioxide, how many grams of carbon dioxide are there?
Answers
The mass of the carbon dioxide is 29.5 g
How do you use the ideal gas equation?The equation of state known as the ideal gas law explains ideal gases. The relationship between a gas's pressure, volume, temperature, and mass in this equation of state is highly helpful for predicting how gases will behave under ideal circumstances. The most typical equation of state for gases is this one.
Using;
PV = nRT
n = PV/RT
n = 1 * 15/0.082 * 273
n = 0.67 moles
Mass = 0.67 moles * 44 g/mol
= 29.5 g
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What would happen if a hot piece of iron were placed in a bucket of water at room temperature? How do you know?
Note* this is a science answer so won't get confused if its a math question
Answers
Answer: Eventually, the metal will cool down and warm up. Overtime the metal and the water will come to the same temperature. This happens because the hot metal is giving energy to the water.
Explanation:This process is called thermal equilibrium. It's the same thing as when you put a spoon in hot tea the spoon gets hot and the tea cools down. Hope this helps!!
How can I solve this using a T chart
Answers
Answer:
The answer to your question is given below
Explanation:
The balanced equation for the reaction is given below:
2KClO₃ —> 2KCl + 3O₂
From the balanced equation above,
2 moles of KClO₃ decomposed to produce 2 moles of KCl and 3 moles of O₂.
Next, we shall determine the number of mole of KClO₃ that will decompose to produce 9 moles of O₂. This can be obtained as follow:
From the balanced equation above,
2 moles of KClO₃ decomposed to produce 3 moles of O₂.
Therefore, Xmol of KClO₃ will decompose to produce 9 moles of O₂ i.e
Xmol of KClO₃ = (2 × 9)/3
Xmol of KClO₃ = 6 moles
Thus, 6 moles of KClO₃ is needed for the reaction.
Next, we shall determine the number of mole KCl that will be produced by the decomposition of 6 moles of KClO₃. This can be obtained as follow:
From the balanced equation above,
2 moles of KClO₃ decomposed to produce 2 moles of KCl.
Therefore, 6 moles of KClO₃ will also decompose to produce 6 moles of KCl.
Finally we shall represent the reaction in a chart as illustrated below:
2KClO₃ —> 2KCl + 3O₂
6 moles —> 6 moles | 9 moles
c What mass of gas is present in
48 cm of oxygen. O2
Answers
Answer:
carbon dioxide
Explanation:
because we breath in oxygen and breath out Carbon
How many molecules of carbon dioxide are in 2.59 grams of carbon dioxide
Answers
First of all, we must know the Avogadro's number:
1 mol of CO2 = 44.0 g (from the molar mass) = 6.02x10^23 molecules of CO2
How must we proceed?
44.0 g CO2 ------------6.02x10^23 molecules CO2
2.59 g CO2 ------------ x
x = 3.54x10^22 molecules CO2
Answer: 3.54x10^22 molecules CO2
You need to prepare 100.0 mL of a pH 4.00 buffer solution using 0.100M benzoic acid (pK
a
=4.20) and 0.240M sodium benzoatc. How many milliliters of each solution should be mixed to prepare this buffer? benzoic acid:
Previous question
Answers
To prepare the pH 4.00 buffer solution, you should mix approximately 61.35 mL of the 0.100 M benzoic acid solution with 38.65 mL of the 0.240 M sodium benzoate solution.The ratio of benzoic acid to sodium benzoate in the buffer solution using the Henderson-Hasselbalch equation.
To prepare a pH 4.00 buffer solution using benzoic acid and sodium benzoate, we need to calculate the appropriate volumes of the 0.100 M benzoic acid and 0.240 M sodium benzoate solutions.
First, we need to determine the ratio of benzoic acid to sodium benzoate in the buffer solution. The Henderson-Hasselbalch equation can help us with this calculation:
pH = pKa + log([A-]/[HA])
Given that the pH is 4.00 and pKa is 4.20, we can rearrange the equation:
log([A-]/[HA]) = pH - pKa
log([A-]/[HA]) = 4.00 - 4.20
log([A-]/[HA]) = -0.20
Next, we take the antilog of -0.20 to find the ratio of [A-] to [HA]:
[A-]/[HA] = antilog(-0.20)
[A-]/[HA] = 0.63
The ratio of [A-] to [HA] is 0.63.
Now, let's calculate the volumes of each solution needed. Let's assume x represents the volume (in mL) of the 0.100 M benzoic acid solution and y represents the volume (in mL) of the 0.240 M sodium benzoate solution.
Since the total volume is 100.0 mL, we have the equation: x + y = 100
Considering the ratio of [A-] to [HA] as 0.63, we can write the equation: y/x = 0.63
Solving these two equations simultaneously will give us the volumes of each solution:
x + y = 100
y/x = 0.63
By substituting y = 0.63x from the second equation into the first equation, we get:
x + 0.63x = 100
1.63x = 100
x = 61.35 mL (rounded to two decimal places)
Substituting this value back into the equation x + y = 100, we find:
61.35 + y = 100
y = 38.65 mL (rounded to two decimal places)
Therefore, to prepare the pH 4.00 buffer solution, you should mix approximately 61.35 mL of the 0.100 M benzoic acid solution with 38.65 mL of the 0.240 M sodium benzoate solution.
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the structure of the nacl crystal forms reflecting planes 0.541 nm apart. what is the smallest angle, measured from these planes, at which constructive interference of an x-ray beam reflecting off the two planes is observed? assume x-rays of wavelength 0.0649 nm are used? give your answer in degrees.
Answers
The smallest angle, measured from the reflecting planes, at which constructive interference of an X-ray beam is observed is approximately 27.2 degrees.
To determine the smallest angle of constructive interference, we can use Bragg's Law, which states that constructive interference occurs when the path difference between two waves is equal to an integer multiple of the wavelength. The formula is given as:
2d sin(θ) = nλ
Where:
d is the distance between the reflecting planes (0.541 nm)
θ is the angle between the incident X-ray beam and the planes (the desired angle)
n is the order of the interference (we are considering the first-order, so n = 1)
λ is the wavelength of the X-ray beam (0.0649 nm)
Rearranging the formula, we get:
sin(θ) = (nλ) / (2d)
θ = arcsin((nλ) / (2d))
Plugging in the values, we have:
θ = arcsin((1 * 0.0649 nm) / (2 * 0.541 nm))
θ ≈ 27.2 degrees
Therefore, the smallest angle at which constructive interference is observed is approximately 27.2 degrees.
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i’m marking brainiest
Answers
Atoms will combine with each in order to become more chemically stable. Compounds are formed between two atoms that have incomplete outer energy levels. The two types of compounds that can be formed between atoms are ionic and covalent. Ionic compounds are formed between two oppositely charged atoms. ionic compounds contain a metal ion and a non - metal ion:
Metals will lose electrons to form positive ions and nonmetals will gain elections to form negative ions. These oppositely charge ions are very attracted to each other and forms very strong bonds as a result.
Ionic compounds are characterized by crystalline structure.
High melting and boiling points, and are solids at room temperature.
Two non-metals will combine to form covalent compounds. Covalent compounds are formed when two atoms share one or more pairs of electrons The force of attraction between the main relatively weak. Covalent compounds are characterized by low melting and boiling points, and can be gases, liquids and soft solids at room temperature.
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How does the level of intermoleculars bonding between the particles in matter affect the state of matter the particles are taking
Answers
Explanation:
Intermolecular force s between particles in a matter holds particles of molecules together in substances.
The stronger the intermolecular forces the more solid a substance is. The weakest intermolecular attraction are found in gases as they have negligible attractive forces in between their particles. Solids are held together by very strong attractive forces. Liquids have weak forces holding them in place and this allows for a little movement. Gases are typically have very weak to negligible attractive forces.Why is it important to know where a resource, that you're using, is renewable or nonrenewable?
Answers
Answer:
It is important to know if a resource is renewable or non-renewable because renewable resources are self-sustaining (unlike non-renewable resources). If a non-renewable resource is used too often, that resource may eventually become non-existant. This can also happen to renewable resources, but it is more difficult.
Geologists discover what seems to be a new, powdery substance, deep underground. When they analyze it it's found to contain, amongst other things, potassium and iodine.
Which of the following are ruled out about this substance?
A. It is a mixture
B. It is a compound
C. It has a lattice structure
D. It is made up of molecules
E. It is an element
Answers
Answer:
Explanation b:
what happens when you add metal to carbonate
Answers
Select all correct answers. Breaking the chemical bonds in reactions requires:
proper orientation of the molecules.
collisions between particles.
an overall release of energy.
sufficient kinetic energy to break the bonds.
an overall decrease in energy.
Answers
The correct answers are: proper orientation of the molecules; collisions between particles; and sufficient kinetic energy to break the bonds, as breaking chemical bonds in reactions requires proper orientation of the molecules and collisions between particles.
Chemical reactions involve the breaking of bonds between atoms in reactant molecues and the formation of new bonds between atoms in product molecules. Breaking these bonds requires a certain amount of energy, which can be supplied through collisions between particles and the proper orientation of the molecules involved in the reaction. When two reactant molecules collide, the orientation of their atoms is important. The atoms need to be in the correct position relative to each other for the chemical bonds to break and new bonds to form.
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which material is said to have a high permeability? group of answer choices nickel bismuth soft iron
Answers
Iron l is said to have a high permeability. High coercivity, high retentivity, and high permeability materials make up the permanent magnets. An object made of a substance that has been magnetized and produces its own persistent magnetic field is referred to as a permanent magnet.
In contrast to an electromagnet, which is made of a coil of the wire wrapped around a ferrous core and needs an electric current to create a magnetic field, a permanent magnet's magnetism is "always on" and it creates its own permeability magnetic field. A common example is a refrigerator magnet used to the keep notes on the door of the refrigerator.
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Look at the reaction below. Which substance is the base in the reaction? H2SO4 (aq) + Ca(OH)2 (aq) → CaSO4 (aq) + 2H2O (l)
a. 2H2O (l) b. H2SO4 (aq) c. CaSO4 (aq) d. Ca(OH)2 (aq)
Answers
Ca(OH)2 (aq) is the base in this reaction. In the given reaction, H2SO4 (aq) and Ca(OH)2 (aq) are reacting to form CaSO4 (aq) and 2H2O (l). A base is a substance that can accept a proton or donate a pair of electrons in a chemical reaction.
In this reaction, Ca(OH)2 is a compound containing a hydroxide ion (OH^-), which can act as a base. It reacts with the sulfuric acid (H2SO4) to form water (H2O) and calcium sulfate (CaSO4). Therefore, Ca(OH)2 (aq) is the base in this reaction.
In the given reaction, H2SO4 (aq) + Ca(OH)2 (aq) → CaSO4 (aq) + 2H2O (l), the base is Ca(OH)2 (aq). This substance is the base because it contains the hydroxide ion (OH-) that reacts with the acid, H2SO4 (aq), which contains the hydrogen ion (H+). The reaction between the acid and base forms the salt, CaSO4 (aq), and water, 2H2O (l). Therefore, the correct answer is option d. Ca(OH)2 (aq).
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How many moles of KC1 are in 1250 mL of 0.75 M KC1
Answers
The following formula can be used to determine how many moles of KC1 are present in 1250 mL of 0.75 M KC1: Molarity (M) is equal to the moles of solute per litre of solution.
In this instance, the volume of the solution is 1250 mL, and the molarity of KC1 is 0.75 M. The following formula can be used to determine how many moles of KC1 are present in 1250 mL of 0.75 M KC1: Molarity (M) times the number of litres in the solution equals 0.75 M times (1250 mL/1000 mL/L) or 0.9375 moles of KC1.
Consequently, 0.9375 moles of KC1 are present in 1250 mL of 0.75 M KC1. It is significant to remember that a solution's molarity is a measurement of the amount of a solute present in a given volume of the solution.
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what is the relationship between kinetic energy and velocity ?
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Which of the following statements on HPLC modes is true? A. Increasing the polarity of the mobile phase decreases the elution time of polar compounds in normal-phase HPLC B. A non-polar stationary phase is used in normal-phase HPLC C. Compounds have a lower attraction to the mobile phase than to the stationary phase in displacement development D. A polar stationary phase is used in reversed-phase HPLC E. More polar compounds elute first in normal-phase HPLC
Answers
The following statements on HPLC modes are true is more polar compounds elute first in normal-phase HPLC (Option E).
The liquid chromatography (HPLC) is a technique in analytical chemistry employed for the separation, identification, and quantification of elements. It is considered a highly sensitive method, and it works by separating the components in a mixture with the assistance of a solvent under high pressure.
There are two modes of HPLC: Reversed-Phase HPLC (RP-HPLC) and Normal-Phase HPLC (NP-HPLC). In RP-HPLC, a nonpolar stationary phase, such as C18, is used, and polar solvents, such as water, are used as mobile phases. Polar stationary phases, such as silica gel, are used in NP-HPLC, while nonpolar solvents, such as hexane, are used as mobile phases.
More polar compounds have a greater affinity for the polar stationary phase than less polar compounds, which have a higher affinity for the nonpolar mobile phase in NP-HPLC. As a result, less polar compounds elute first in normal-phase HPLC.
Thus, the correct option is E.
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If you have a closed container that has a pressure of 2.35atm, and a volume of 1.2L, and contains 76.33g Cl2, what is the resulting temperature in K
Answers
The resulting temperature of a closed container that has a pressure of 2.35atm, and a volume of 1.2L, and contains 76.33g Cl2 is 31.8K.
How to calculate temperature?The temperature of a given gas can be calculated by using the ideal gas law equation:
PV = nRT
Where;
P = pressure V = volume n = number of molesR = gas law constantT = temperatureno of moles of Cl2 = 76.33g ÷ 70.91g/mol = 1.08mol
2.35 × 1.2 = 1.08 × 0.0821 × T
2.82 = 0.088T
T = 2.82/0.088
T = 31.8K
Therefore, the resulting temperature of a closed container that has a pressure of 2.35atm, and a volume of 1.2L, and contains 76.33g Cl2 is 31.8K.
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How does light energy move from one place to another?
Answers
Answer:
yes light can move from a large space to another at a speed of 186,400 miles (300,000 km) per second.
Explanation:
lights does not need any material to carry its energy along which means I can move really fast
Answer:
yes light can move from a large space to another at a speed of 186,400 miles (300,000 km) per second.
Explanation:
lights does not need any material to carry its energy along which means I can move really fast
Explanation:that should help uuu
If an object weighs 2,354 N on Earth, what is the objects mass?
Answers
Answer:
4.0 kg
Explanation:
M = W/g = 39.2/9.8 = 4.0 kg
sorry if its wrong-
if water is added to a 0.70 molar solution of CuSO4 what will change
A. molarity will increase
B. Molarity will decrease
C. the amount of CuSO4 will decrease
D. No change in molarity or amount of salute
Answers
Answer:
B. Molarity will decrease
Explanation:
Molarity is one of the measures of the molar concentration of a solution. It is calculated by dividing the number of moles of the solute by the volume of the solvent. This means that the higher the amount of solute in relation to the volume of solvent, the higher the molarity of that solution.
In essence, adding water to a solution dilutes it i.e it increases the solvent's volume in relation to the solute, causing the molarity to decrease. In a nutshell, diluting a solution (by adding water or more solvent) causes the molarity of such solution to decrease. For example, if water is added to a 0.70 molar solution of CuSO4, the molarity of the solution will DECREASE.
4. Metal X forms two different chlorides A and B, if 12.7g of chloride A and 16.3g of chloride B contain 7.1g and 10.7g of chlorine respectively. Show that the figures agree with the law of multiple proportions. Write their formulae.
Answers
The formulae of the metal according to the law of multiple proportions are XCl₂ and XCl₃, and X is Fe so FeCl₂ and FeCl₃
We have the two chlorides that are XyClw and XyClz. We have to show that the ratios w to z are in small whole numbers.
Compound A = 12.7 g X and 7.1 g Cl, then X must be 5.56 g
Compound B = 16.3 g X and 10.7 g Cl, then X must be 5.56 g.
7.1 x (12.7/16.3) = 5.53 g Cl for each gram of X
10.7 x (12/7/16.3) = 8.34 g Cl for each gram of X. Then what is the ratio of the two Cl numbers: Now, divide both numbers by the smaller one. That is
5.53/5.53 = 1.00
8.34/5.53 = 1.508.
Rounding off 1.508 to 1.50, then you can see that 1.0 to 1.5 is actually 2 to 3 and those are small whole numbers. Within experimental error, the law of multiple proportions is proved to be true.
The compounds must be XCl₂ and XCl₃, and X is Fe so FeCl₂ and FeCl₃ are the compounds.
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Q 1. Element M is a metal that forms compounds of the type MX2, MX3, and MX4, where X is a Chlorine (Cl).
I) What is the expected trend in the ionic radius of M in these compounds?
II) Arrange these compounds in order of decreasing ionic radius of M.
Do not respond if u don’t know the answer. I’ll report it and u will get a warning.
Answers
Answer:
See explanation
Explanation:
The ionic radius of metal M decreases as the magnitude of charge on the metal M increases. The ionic radius is the distance between the nucleus and the electron in the outermost shell of an ion. So, ionic radius decreases with increasing positive charge.
We can see that from the various formulae in the question that the metal forms cations M^2+, M^3+ and M^4+ respectively. The order of decreasing ionic radius of the compounds is;
MX2 > MX3 > MX4
Answer:
dont know
Explanation:
Which statement about paper chromatography is correct?
A A solvent is needed to dissolve the paper.
B
Paper chromatography separates mixtures of solvents.
с
The solvent should cover the baseline.
D The baseline should be drawn in pencil.
Answers
None of the given options is entirely correct.
With paper chromatography, mixtures of substances are separated according to how well they dissolve in a solvent and how well they stick to the paper's fibers.
What is paper chromatography?A laboratory method called paper chromatography is used to separate mixtures of substances into their constituent parts. It is founded on the idea that different substances would flow through a stationary phase (in this case, a sheet of paper) at varying rates depending on how soluble they are in a particular solvent.A small amount of the mixture is put on a strip of filter paper close to one end for paper chromatography. In a container with a tiny amount of suitable solvent in the bottom, the paper is then placed upright. The various parts of the mixture are carried up the paper by the solvent as it rises. Depending on their solubility and capacity to cling to the paper fibers, the components migrate over a range of distances.learn more about paper chromatography here
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