Final answer:
An atom's Lewis dot structure with two dots indicates that it is Helium (He), which has two valence electrons in its outermost shell, achieving a stable electronic arrangement and typically not forming chemical bonds.
Explanation:
An atom’s Lewis dot structure with two dots indicates it has two valence electrons. The element that fits this description is Helium (He). The number of dots around an element's Lewis symbol represents its valence electrons, which are crucial for forming chemical bonds. Helium's electron configuration is 1s2, meaning it has two electrons in its outermost shell, both of which are depicted as dots in its Lewis dot structure. This structure is a visually simple method to represent valence electrons and predict bonding behavior. Helium, with its two valence electrons completely filling its first and only energy level, achieves a stable electronic arrangement, thus typically does not form chemical bonds with other elements.
Final answer:
An atom's Lewis dot structure with two dots likely represents helium (He), as the number of dots indicates valence electrons, and helium has two valence electrons, completing its outer shell.
Explanation:
An atom's Lewis dot structure with two dots could represent the element helium (He). This is because the number of dots in a Lewis dot structure indicates the number of valence electrons an atom has. Helium is in Group 18 of the periodic table, which is known as the noble gases. These elements are characterized by having a full outer shell of electrons. For helium, which is in the first period of the periodic table, having two valence electrons fills its outer shell, as it only has one shell. Therefore, its Lewis dot structure is represented with two dots, signifying its two valence electrons.
Why is it hard to wash oil based paints off your hands using only water
use baby oil...it helps get the oil paint off. I think it is hard because it is heavier than water and it sticks to your skin and also the water and oil don't mix like other things so it makes it alot harder. use baby oil and wash.
CAN SOMEONE PLEASE HELP?
How many orbitals are completely filled in an atom whose electron configuration is 1s^2 2s^2 2p^6 3s^1?
Hey there!:
The 1s, 2s and 2p subshells are completely filled (a maximum of two electrons go into the 1s subshell and a maximum of two electrons go into the 2s subshell. The 2p subshell includes 3 orbitals, with 2 electrons maximum per orbital). The 3s subshell has only one of a maximum of two electrons.
Hope that helps!
Which of the following is true of a gas?
A. A gas is not easily compressed because of the low intermolecular forces.
B.A gas does not easily mix with other gases because of the high density of substances as gases.
C.Gas particles have high intermolecular forces, leading to the ability to flow easily
. D.Gas particles spread out to fill a container, leading to a low density of the gas.
Answer:
d
Explanation:
what is the freqency of light if its wavelength is 5.4 x 10^-4 m
Using the formula as frequency = speed of light/ wavelength of light
f = c/λ
Where c = [tex]3.0 X 10^{8}[/tex] m/s and λ = [tex]5.4 X 10^{-4}[/tex] m
Substituting in above formula we get,
∴ f = [tex]\frac{3.0 X 10^{8}m/s}{5.4 X10^{-4}m}[/tex]
∴f = 5.55 X [tex]10^{13}[/tex] Hz
The frequency will be as 5.55 X [tex]10^{13}[/tex] HzAnswer:
55x 1013x i think im not too sure
Explanation:
If a copper penny turns green when exposed to air and moisture, it is due to a _ change
Final answer:
A copper penny turns green due to a chemical change, which is the oxidation of copper resulting in the formation of a green patina that protects the penny from further corrosion.
Explanation:
When a copper penny turns green after being exposed to air and moisture, it is due to a chemical change. This is a process similar to what happens to copper surfaces like the Statue of Liberty, where the oxidation of copper leads to the formation of a green patina. The chemical reaction for the oxidation can be represented by the equation 2 Cu(s) + O₂(g) → CuO(s), where copper (Cu) reacts with oxygen (O₂) to form copper oxide (CuO). The green color is attributed to additional reactions that form compounds like copper carbonate and copper sulfate, which comprise the patina. This patina acts as a protective layer, preventing further corrosion through a process known as passivation.
Scientists in _______ discover new products and processes and improve current technology.
legal services
research and development
cooperate management
marketing
Compared to ultraviolet light, an electromagnetic wave that has a higher frequency will also have ________.
Answer: High energy and Low wavelength.
Explanation: We are given an electromagnetic wave having high energy, so by using Planck's equation:
[tex]E=h\nu[/tex]
where, E = energy
h = Planck's constant
[tex]\nu[/tex] = frequency
here, Energy and frequency follow direct relation and hence high frequency means high energy.
and [tex]\nu=\frac{c}{\lambda}[/tex]
[tex]\nu[/tex] = Frequency
c = speed of light
[tex]\lambda[/tex] = wavelength
Here, the frequency is inversely related to the wavelength, hence high frequency means low frequency.
What are characteristics of reliable science? Bias and controlled variables Controlled variables and small test groups Empirical data and bias Replicable results and empirical data
The correct answer is 'Replicable results and empirical data'.
For science to be reliable, the scientific method must be replicable and the data must be empirical.
When scientists publish their work they write enough data so that scientists all over the world can replicate their experiment and get same results.
Also the scientific method is based on empirical data which is based on direct observation of the world and is contrary to hypothesis that do not rely on facts.
Which of these measurements is expressed as three significant figures?
A. 0.0070 cm
B. 883.2 km
C. 4.20 g
D. 990, 000 mL
Which of these measurements is expressed as three significant figures?
C. 4.20 g
Which of the following properties is not unique to water?
Surface Tension
Viscosity
Density
Adhesion
Answer:
Density
Explanation:
Density is not unique only to water. All liquids have density. Liquids have density either higher or lower than that of water. All liquids have mass and they occupy the volume of the container in which they are kept. Density is the ratio of mass to volume.
Density = mass/ volume.
As all liquids have mass and volume they also have density.
You find small pieces of ice instead of ice cubes in the freezer. State how this is possible.
The appearance of small pieces of ice instead of ice cubes in the freezer can happen through a process called sublimation, in which ice transitions directly into a gaseous state, additionally influenced by thermal equilibrium as per the second law of thermodynamics.
Explanation:Finding small pieces of ice instead of ice cubes in the freezer could be due to a process called sublimation, in which solids transition directly into the gaseous state, bypassing the liquid state. This is a common phenomenon for snow and ice at temperatures below the melting point of water. It's a slow process that can be accelerated by reduced atmospheric pressure in the freezer or sporadic variations in the temperature of the freezer. The varying conditions inside the freezer could cause ice cubes to break down into smaller pieces of ice.
Another contributing factor could be the thermal equilibrium dictated by the second law of thermodynamics. This law predicts that after heat transfers energy from the warmer freezer air to the colder ice, the components will eventually reach a thermal equilibrium. The continual transfer of energy could cause the ice cubes to reduce in size over time.
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What makes a compound different from a molecule?
A.
contains 2 or more atoms
B.
held together by chemical bonds
C.
use of chemical symbols
D.
contains 2 or more different elements
how might 15% solution of flubber be made
Adding 15 g of Flubber with 85 g of inert solvent will result in the formation of 15 % solution.
Data Given:W/V % = 15 %
Weight of Flubber = ?
Weight of Solution = ?
Solution:Let's suppose we are going to prepare a 100 mL solution. The using following formula we can calsulate the amount of Flubber required.
W / W % = (Weight of Flubber ÷ Weight of Solution) × 100
Putting values,
15 % = (Weight of Flubber ÷ 100 g) × 100
Solving for Weight of flubber,
Weight of Flubber = (15 × 100 g) ÷ 100
Weight of Flubber = 15 g
Hence, taking 15 g of Flubber and adding it to 85 g of solvent will result in the formation of 15% Flubber solution.
Final answer:
To create a 15% solution of flubber, combine 15 grams of flubber with sufficient solvent to make 100 milliliters of solution, ensuring the flubber is fully dissolved and the total volume reaches 100 milliliters.
Explanation:
How to Make a 15% Solution of Flubber
To make a 15% solution of flubber, you would typically mix 15 grams of flubber (the solute) with enough solvent to make a total solution volume of 100 milliliters. The steps to creating this solution are as follows:
Weigh 15 grams of flubber using a scale.
Transfer the flubber into a container, such as a beaker.
Add a solvent, usually water, to the beaker.
Stir the mixture until the flubber is completely dissolved.
Continue adding water until the total volume of the solution is 100 milliliters.
Remember that when making a solution, the percentage is calculated by the mass of the solute divided by the total volume of the solution, and then multiplied by 100 to get the percentage. Therefore, a 15% solution of flubber in this case means you have 15 grams of flubber in every 100 milliliters of solution.
]
Please help WILL MARK BRAINLIEST can someone explain to me what happens when thermal energy is added to a state of matter?!
Well it depends, if you add heat to ice it will melt, if you add heat to water it will evaporate.
Hope it helps!
Why hello there, Lithommie
Your question: can someone explain to me what happens when thermal energy is added to a state of matter?
My answer:
Very good question
lets take a look at what happens when thermal energy is added to a state of matter.
In this case lets look at a football game, at the beginning of the game the players represent the state SOLID the scores 0-0 and the heat is on. Remember the players are solid and when they are melting into a liquid by the end of the game and the players are mixing through the field and collapsing with one another and by the end of the game they become liquid.
Do you understand more clearfully? If you add heat to ice( the solid ) it melts and becomes water( The liquid )
IMPORTANT: If my answer helped please mark me as brainliest thank you and have the best day ever!
Sodium carbonate (na2co3) is used to neutralize the sulfuric acid spill. How many kilograms of sodium carbonate must be added to neutralize 2.01×103 kg of sulfuric acid solution?
[tex]\boxed{2172.1{\text{ kg}}}[/tex] of sodium carbonate must be added to neutralize [tex]2.01 \times {10^3}{\text{ kg}}[/tex] of sulfuric acid solution.
Further Explanation:
Stoichiometry:
Theamountof species present in the reaction is determined with the help of stoichiometryby the relationship between reactants and products. It is used to determine the moles of a chemical species when moles of other chemical species present in the reaction is given.
Balanced chemical reaction between sodium carbonate and sulphuric acid is as follows:
[tex]{\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}} + {{\text{H}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}} \to {\text{N}}{{\text{a}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}} + {{\text{H}}_{\text{2}}}{\text{O}} + {\text{C}}{{\text{O}}_{\text{2}}}[/tex]
According to stoichiometry of reaction, one mole of [tex]{\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}[/tex] reacts with one mole of [tex]{{\text{H}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}}[/tex] to produce one mole of [tex]{\text{N}}{{\text{a}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}}[/tex], one mole of [tex]{{\text{H}}_{\text{2}}}{\text{O}}[/tex] and one mole of [tex]{\text{C}}{{\text{O}}_{\text{2}}}[/tex]. So stoichiometric ratio between [tex]{\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}[/tex] and [tex]{{\text{H}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}}[/tex] is 1:1.
The formula to calculate number of moles of [tex]{{\text{H}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}}[/tex] is as follows:
[tex]{\text{Moles of }}{{\text{H}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}} = \dfrac{{{\text{Mass of }}{{\text{H}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}}}}{{{\text{Molar mass of }}{{\text{H}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}}}}[/tex] …… (1)
Substitute [tex]2.01 \times {10^3}{\text{ kg}}[/tex] for mass of [tex]{{\text{H}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}}[/tex] and 98.079 g/mol for molar mass of [tex]{{\text{H}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}}[/tex] in equation (1).
[tex]\begin{aligned}{\text{Moles of }}{{\text{H}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}} &= \left( {\frac{{2.01 \times {{10}^3}{\text{ kg}}}}{{{\text{98}}{\text{.079 g/mol}}}}} \right)\left( {\frac{{{{10}^3}{\text{ g}}}}{{1{\text{ kg}}}}} \right)\\&= 20493.7{\text{ mol}}\\\end{aligned}[/tex]
Since one mole of [tex]{\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}[/tex] reacts with one mole of [tex]{{\text{H}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}}[/tex], 20493.7 moles of [tex]{{\text{H}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}}[/tex] reacts with 20493.7 moles of [tex]{\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}[/tex].
The formula to calculate mass of [tex]{\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}[/tex] is as follows:
[tex]{\text{Mass of N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}} = \left( {{\text{Moles of N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}} \right)\left( {{\text{Molar mass of N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}} \right)[/tex] …… (2)
Substitute 20493.7 mol for moles of [tex]{\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}[/tex] and 105.9888 g/mol for molar mass of [tex]{\text{N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}[/tex] in equation (2).
[tex]\begin{aligned}{\text{Mass of N}}{{\text{a}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}} &= \left( {{\text{20493}}{\text{.7 mol}}} \right)\left( {{\text{105}}{\text{.9888 g/mol}}} \right)\left( {\frac{{{{10}^{ - 3}}{\text{ kg}}}}{{1{\text{ g}}}}} \right)\\&= 2172.1{\text{ kg}}\\\end{aligned}[/tex]
Learn more:
Calculate the moles of chlorine in 8 moles of carbon tetrachloride: https://brainly.com/question/3064603 Calculate the moles of ions in the solution: https://brainly.com/question/5950133
Answer details:
Grade: Senior School
Subject: Chemistry
Chapter: Mole concept
Keywords: stoichiometry, Na2CO3, H2SO4, Na2SO4, CO2, H2O, balanced chemical reaction, 1:1, one mole, stoichiometric ratio, 2172.1 kg.
To neutralize the sulfuric acid spill, you need to use sodium carbonate (Na2CO3). For every 2 moles of sulfuric acid, you need 2 moles of sodium carbonate. Therefore, to neutralize 2.01 x 10³ kg of sulfuric acid solution, you would need an equal mass of sodium carbonate.
Explanation:To neutralize the sulfuric acid spill, you need to use sodium carbonate (Na2CO3). The balanced equation for the reaction between sulfuric acid and sodium carbonate is:
2 NaHCO3(aq) + H2SO4(aq) → Na2SO4(aq) + 2 CO2(g) + 2 H2O(l)
From the equation, you can see that for every 2 moles of sulfuric acid, you need 2 moles of sodium carbonate. Therefore, to neutralize 2.01 x 10³ kg of sulfuric acid solution, you would need an equal mass of sodium carbonate. So, you would need 2.01 x 10³ kg of sodium carbonate.
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An igneous rock that _____ is made of really small mineral crystals. A. cools rapidly B. crystallizes slowly C. undergoes extreme changes in pressure D. undergoes extreme changes in temperature
Answer: An igneous rock that cools rapidly is made of really small mineral crystals.
Explanation:
The layers inside the earth are hot enough to melt a rock. The liquid or molten rock is known as magma.
When a molten rock cools and solidifies, it results in the formation of an igneous rock.
The slow cooling of magma will result in the formation of an igneous rock with large crystals. Whereas, rapid cooling of lava will result in the formation of an igneous rock with small crystals.
Thus, it can be concluded that an igneous rock that cools rapidly is made of really small mineral crystals.
Which element or compound has lost electrons in this oxidation-reduction reaction?
4Li + 2CoO → 2Co + 2Li2O
A. CoOB. Li2OC. LiD. CoE. OAnswer: The correct answer is Option C.
Explanation:
Oxidation reaction are the reactions in which an element or compound looses electrons and the element that looses electrons is known as oxidized species. The oxidation state of the species is increased for these kind of reactions.
[tex]X\rightarrow X^{n+}+ne^-[/tex]
Reduction reaction are the reactions in which an element or compound gains electrons and the element that gains electrons is known as reduced species. The oxidation state of the species gets reduced for these kind of reactions.
[tex]X^{n+}+ne^-\rightarrow X[/tex]
For the given chemical reaction:
[tex]4Li+2CoO\rightarrow 2Co+2Li_2O[/tex]
On reactant side:
Oxidation state of lithium = 0
Oxidation state of cobalt = +2
Oxidation state of oxygen = -2
On product side:
Oxidation state of lithium = +1
Oxidation state of cobalt = 0
Oxidation state of oxygen = -2
As, oxidation state of lithium is increasing, it is loosing electrons and thus it is undergoing oxidation reaction and the oxidation state of cobalt in reducing, it is gaining electrons and thus it is undergoing reduction reaction .
Hence, the correct answer is Option C.
Answer:
C. Li
Explanation:
How many electrons sub orbitals and electrons are in an a s orbital
There are four sublevels s, p, d ,f 2 in the s
The mass of one mole of sugar is 342 g. You used 19 g of sugar. Calculate the number of moles of sugar you used.
Answer: The number of moles of sugar that is used are 0.055 moles.
Explanation:
We are given:
Mass of 1 mole of sugar = 342 g
Mass of sugar used = 19 g
So, by applying unitary method, we get:
342 grams of sugar is making 1 mole
So, 19 grams of sugar will make = [tex]\frac{1mol}{342g}\times 19g=0.055mol[/tex]
Hence, the number of moles of sugar that is used are 0.055 moles.
Enthalpy of reaction SiCl4(l)+2H2O(l)?SiO2(s)+4HCl(g)
The question involves calculating the enthalpy of reaction (ΔH) for the conversion of SiCl4 and H2O to SiO2 and HCl, focusing on the energy changes associated with bond breaking and formation during this chemical reaction.
Explanation:The question refers to the enthalpy of reaction for the process in which silicon tetrachloride (SiCl4) reacts with water (H2O) to produce silicon dioxide (SiO2) and hydrochloric acid gas (HCl). This reaction can be represented as:
SiCl4(l) + 2H2O(l) → SiO2(s) + 4HCl(g)
To understand the enthalpy change (ΔH) of this reaction, one needs to consider the bond energies involved in breaking and forming chemical bonds during the reaction. The process of calculating ΔH for a reaction involves understanding the energy required to break bonds in the reactants and the energy released by forming bonds in the products.
Silicon tetrachloride is a covalent tetrahedral molecule that engages in reactions leading to the formation of silicon dioxide and hydrochloric acid gas when exposed to water. This type of reaction is exothermic if the energy released in forming the products' bonds is greater than the energy required to break the reactants' bonds. Calculating the exact ΔH would require specific values of bond energies, which are not provided here.
The enthalpy of reaction for SiCl₄(l) + 2H₂O(l) → SiO₂(s) + 4HCl(g) is calculated to be -66 kJ.
This involves using the enthalpies of formation for each compound. The result indicates an exothermic reaction.
To determine the enthalpy of reaction for the given chemical equation, we need to use the known enthalpies of formation for each compound involved:
SiCl₄(l)2H₂O(l)SiO₂(s)4HCl(g)The enthalpy of the reaction (ΔHrxn) is calculated using the formula:
ΔHrxn = ΣΔHf(products) - ΣΔHf(reactants)
Assuming standard enthalpy of formation (ΔHf) values as follows:
SiCl₄(l): -640 kJ/molH₂O(l): -286 kJ/molSiO₂(s): -910 kJ/molHCl(g): -92 kJ/molThe enthalpy of the reaction would be calculated as:
ΔHrxn = [(-910) + 4(-92)] - [(-640) + 2(-286)] kJ
That simplifies to:
ΔHrxn = (-910 - 368) - (-640 - 572) kJ = -1278 + 1212 kJ = -66 kJ
Thus, the enthalpy of the reaction is -66 kJ.
If the relative humidity is high and the temperature drops, water vapor may
Answer:
condense
Explanation:
If the relative humidity is high and the temperature drops, water vapor may condense as pressure increases with decrease in temperature.
What is pressure?
Pressure is defined as the force applied on an object perpendicular to it's surface per unit area over which it is distributed.Gauge pressure is a pressure which is related with the ambient pressure.
There are various units by which pressure is expressed most of which are derived units which are obtained from unit of force divided by unit of area . The SI unit of pressure is pascal .
It is a scalar quantity which is related to the vector area element with a normal force acting on it.It is distributed over solid boundaries and across arbitary sections of fluid normal to the boundaries at every point.
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Which equations represent precipitation reactions?
Na2S + FeBr2 → 2NaBr + FeS
MgSO4 + CaCl2 → MgCl2 + CaSO4
LiOH + NH4I → LiI + NH4OH
2NaCl + K2S → Na2S + 2KCl
AgNO3 + NaCl → AgCl + NaNO3
Multiple answers
Answer:
Na₂S + FeBr₂ → 2NaBr + FeS(s)
MgSO₄ + CaCl₂ → MgCl₂ + CaSO₄(s)
AgNO₃ + NaCl → AgCl(s) + NaNO₃
Explanation:
You must recall the pertinent solubility rules:
Salts of Group 1 elements (Li⁺, Na⁺, K⁺) and of NH₄⁺ are soluble Salts containing nitrate ion (NO₃⁻) are soluble. Salts containing Cl⁻, Br⁻, and I⁻ are generally soluble. An important exception is Ag⁺. Thus, AgCl is insoluble. Most sulfate (SO₄²⁻) salts are soluble. An important exception is CaSO₄, which is insoluble. Most sulfide (S²⁻) salts of transition metals are insoluble.Na₂S + FeBr₂ → 2NaBr + FeS(s)
NaBr is soluble (Rule 1). FeS is insoluble (Rule 5), so a precipitate forms.
MgSO₄ + CaCl₂ → MgCl₂ + CaSO₄(s)
MgSO₄ is soluble (Rule 3). CaSO₄ is insoluble (Rule 4), so a precipitate forms.
AgNO₃ + NaCl → AgCl(s) + NaNO₃
NaNO₃ is soluble (Rule 1). AgCl is insoluble (Rule 3) so a precipitate forms.
LiOH + NH₄I → LiI + NH₄OH and 2NaCl + K₂S → Na₂S + 2KCl
All products are soluble (Rule 1), so these are not precipitation reactions.
HEY I GOT YO ANSWER
THE ANSWERS ARE A B AND DA LAST ONE
In a hypothetical atom, electron N transitions between energy levels, giving off orange light in the transition. In the same atom, electron P gives off violet light when it transitions between energy levels. Did electron N or electron P have a transition that covered a greater energy difference? The electromagnetic spectrum has been provided to assist you in answering the question, and you should reference info from the spectrum in your answer. Be clear and fully explain how you arrived at your answer.
Yes, electron N or electron P have a transition that covered a greater energy difference.
Explanation:N electron giving orange light means light wave of 650 to 700 nm wavelength according to electromagnetic spectrum.P electron giving Violet light means light wave with a wavelength of 400 nm.As wave length and energy of a wave is inversely proportional to each other.It means N electron light with long wavelength has low energy.P electron light with short wave length has high energy.Hence both electrons have transitions of great energy difference.Answer : Electron P has greater energy difference than the Electron N.
Explanation :
Wavelength range of violet light = 400 - 500 nm
Wavelength range of orange light = 600 - 700 nm
The Planck's equation is,
[tex]E=\frac{h\times c}{\lambda}[/tex]
where,
E = energy of light
c = speed of light
[tex]\lambda[/tex] = wavelength of light
According to the Planck's equation, wavelength and energy follow inverse relation. As the wavelength increases, energy decreases.
From the given spectrum, the wavelength of violet light is less. We conclude that When electron P gives violet light on transition it means that energy difference between the energy level was high.
From the given spectrum, the wavelength of orange light is more. We conclude that When electron N gives orange light on transition it means that energy difference between the energy level was low.
So, Electron P which gives violet light on transition has greater energy difference than the Electron N.
Please answer ASAP! Where on the Periodic Table are Transition Elements located?
A. In Group 2A
B. In different places
C. In Group 1A
D. In the middle
c group A is the correct answer
Answer:
The answer is D "in the middle"
Explanation:
I did the test and got 100%
Have a great day! :)
How many significant figures are in 136,000 ml?
Answer:
There are 3 sig figs
Explanation:
Sig figs are the amount of figures counting from the left side of the number until you reach the first zero. Starting from the left, I counted one, three, and six. That's 3 numbers, and therefore, that's how we got our answer. The only exception is when there is a decimal. Then all the numbers before the decimal, despite whether or not they're zeros, are sig figs.
Answer:
3 significant figures
Explanation:
The significant figure is such that every number after it is zero. As such, when a number is given to be rounded to a x significant numbers, the count starts from the left with the first number on the left being the first significant number and others following through i.e the next being the second significant number.
However, to round off to x significant number, we consider the number in the x+1 position. If the number is up to 5, it will be rounded ( as well as every other numbers to the right) to zero but 1 will be added to the number in the x position.
Given the theory, 136,000 ml has 3 significant figures.
How many grams are in 2.570 kilograms? (Give your answer in standard form.)
2.57 kilograms = 2570 grams
i think this is standard form but i don't know 100%
Remember that there are 1000 grams in 1 kilogram.
Multiply 1000 grams with 2.570 kilograms
1000 x 2.570 = 2570
2570 grams are in 1 kilogram
hope this helps
Which material has a greater density, lead or feathers?
Lead has a higher density
which element has a larger ionic radius sulfur (S)?
A. Oxygen
B. Fluorine (F)
C. Chlorine (Cl)
D. Phosphorus (P)
Ionic bonds generally form when the bonded elements have a difference in electronegativity greater than 1.5 to 1.7. Subtract the electronegativities for the following pairs of elements and predict whether they form ionic bonds.
Electronegativity difference of Na and F:
yes
no
Ionic bonds are formed by the differences in the electronegativities of the elements. Yes, sodium, and fluorine will form ionic bonds. Thus, option A is correct.
What are ionic bonds?Ionic bonds are the category of chemical bonds that are formed by the complete transfer of the electron from one atom to another resulting in the formation of the cation and the anion. This sharing occurs through the difference in electronegativity.
If the electronegativity difference is more than 1.5 to 1.7 then, the electron sharing occurs by the virtue of the valence shell.
Given,
Electronegativity of fluorine (F) = 3.98
Electronegativity of sodium (Na) = 0.93
The differences are calculated as:
= Electronegativity of fluorine - Electronegativity of sodium
= 3.98 - 0.93
= 3.05
As 3.05 > 1.7 it will form the ionic bond.
Therefore, yes sodium and fluorine form an ionic bond.
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Final answer:
The difference in electronegativity between Na and F is large enough to predict the formation of an ionic bond. Sodium, being a metal, donates an electron to fluorine, a nonmetal, resulting in the creation of oppositely charged ions that attract each other.
Explanation:
When predicting whether a pair of elements will form an ionic bond, the key factor to consider is the electronegativity difference between the two elements. Ionic bonds generally form when one element (typically a metal) transfers one or more valence electrons to another element (typically a nonmetal), resulting in the formation of ions that are oppositely charged and attract each other due to electrostatic forces. In the case of sodium (Na) and fluorine (F), the electronegativity difference is indeed large enough to favor the formation of an ionic bond.
Electronegativity differences greater than approximately 1.7 tend to lead to ionic bonding. Sodium (Na), a metal, has a much lower electronegativity compared to fluorine (F), which is a highly electronegative nonmetal. The difference in electronegativity between Na and F is roughly 3.0, which is significantly greater than the threshold value for ionic bonding, indicating that Na and F will form an ionic bond.
The measurement 6.4x10^3 g also could be writen as
The measurement 6.4x10^3 g could be written as 6.4 kg in kilograms and as 6.4x10^6 mg in milligrams, considering the unit conversions.
Explanation:The measurement 6.4x10^3 g can be expressed in other units. The use of scientific notation, such as 6.4x10^3, helps us write very large or very small numbers in a more manageable way. This notation means that you are multiplying 6.4 by 10 raised to the power of 3, or in other words, adding three more zeros to 6.4, which results in 6400.
To convert it to kilograms, we need to remember that 1 kilogram is equal to 1000 grams. So, we can divide the number of grams by 1000 to get the measurement in kilograms. Hence, 6.4x10^3 g = 6.4 kg. Similarly, we can convert it to milligrams, remembering that 1 gram equals 1000 milligrams, which results in 6.4x10^3 g = 6.4x10^6 mg.
Note:
Always remember to check the magnitude of the units you are converting to ensure accuracy.
Learn more about Unit Conversion here:https://brainly.com/question/19420601
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