Answer:
2
Explanation:
Two or more atoms with dissimilar physical or chemical characteristics cannot unite to form an element. Therefore, chlorine is the element whose ionic radius is larger than the atomic radius. the correct option is option 4.
What is element?
Element is made up of atoms or atoms together to make element. Atoms of a given element are always the same, which means that all of the characteristics of all atoms with one kind of element are the same.
The size of anion is always larger than size of its neutral atom. the size of cation is always smaller than size of its neutral atom. Cl⁻ is larger in size than Cl. Chlorine is the element whose ionic radius is larger than the atomic radius.
Therefore, chlorine is the element whose ionic radius is larger than the atomic radius. the correct option is option 4.
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7. This value tells the number of protons that are in an atom *
atomic mass
atomic number
mass number
Answer:
Explanation:
55 newtons
4. Paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does
not. Why?
Answer:
Paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not. The ignition temperature of paper is less, so it catches fire easily. It does not catch fire when wrapped around aluminium pipe because aluminium absorbs the heat, so paper does not attain its ignition temperature.
True or false? Buildings that are right on top of seismic waves that have really short wavelengths experience the least damage than buildings that are on top of seismic waves with long wavelengths.
Answer:
Your answer is false
Explanation:
Hurry up i'm being times shdsy93u20
The chart shows masses and velocities of four objects.
A 3-column table with 4 rows titled Motion of 4 Objects. The first column labeled Object has entries W, X, Y, Z. The second column labeled Mass (kilograms) has entries 12, 15, 18, 28. The third column labeled Velocity (meters per second) has entries 5, 8, 2, 10.
Which lists the objects in order, from least to greatest momentum?
A. W, X, Y, Z
B. Z, Y, X, W
C. Z, X, W, Y
D. Y, W, X, Z
Answer:
its D
Explanation:
Took test 2021 edge
Answer:
The correct answer is D: Y, W, X, Z.
Explanation:
The correct answer is D: Y, W, X, Z.
Scientists have categorized trees based on whether they keep or lose their leaves each year. Another logical way to categorize trees is based on the
A O types of nutrients needed to grow.
amount of oxygen that is released into the air.
B
c. O color of leaves that are produced.
DO type of fruit that is produced.
Answer:
D
Explanation:
I think but it is an better attempt than the other guy answer.
Scientists have categorized trees based on whether they keep or lose their leaves each year. Another logical way to categorize trees is based on the type of fruit that is produced.
What is fruit ?In blooming plants, the structure that contains seeds after flowering is called a fruit. Flowering plants disperse their seeds through their fruits.
A fruit is a mature, ripened ovary, along with the contents of the ovary. The ovary is the ovule-bearing reproductive structure in the plant flower. The ovary serves to enclose and protect the ovules, from the youngest stages of flower development, until the ovules become fertilized and turn into seeds.
The Latin word fructus is where the term "fruit" originally came from. This was derived from the verb fruit, which means "to enjoy." Almost anything that could be cultivated from the ground was considered "fruit" when it first entered the English language.
Thus, option D is correct.
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Rank the metals from most reactive (1) to least reactive (3).
Silver:
Strontium:
Technetium:
Answer:
Silver: 3
Strontium: 1
Technetium: 2
Answer:
1:Silver
2:Strontium
3:Technetium
Hope this helps!! Good Luck!!
What process causes the tectonic plates of the crust to move
Answer:
convection current
hope it helps!
Which of the following is an example of an element:
A) H₃O
B) He
C) Ca₂CO₃
D) CaCl₂
PLEASE ANSWER QUICKLY
Answer:
He(HELIUM)
Explanation:
He (Helium) is an element as it is pure and cannot be broken into simpler substances.
Hope this helped!
~AH1807
Answer:
He (Helium)
Explanation:
its second element in periodic table.
it has two electrons in outer shell.
*15-20 POINTS IF YOU ANSWER CORRECTLY & ADDED BRAINIEST*
An electron configuration of 2-7-6 represents the atom of...
A.) phosphorus and is in the ground state
B.) phosphorus and is in the excited state
C.) potassium and is in the ground state
D.) potassium and is in the excited state
Answer:
2 8 5
Is phosphorus normal ground state configuration this configuration 2 7 5 is not possible for phosphorus or potassium
Explanation:
Answer:
D) Potassium and is in the excited state.
Explanation:
I need help with these two please!!!!!
Answer:
First one c for the second one i think is c sorry if wrong hope this help
Explanation:
(will mark brainliest) pls don’t scam - due today! these are my last points please answer! please answer the first and second one
Answer:
Genetics?
Explanation:
Answer:
1. trait
2. gene
[tex] \huge \color{seagreen} \underline \color{seagreen} \underline \color{seagreen} \tt\star \: QUESTION \: \star[/tex]
0.177 g of a metal produces with dil. HCl 177.0 mL of dry hydrogen gas at 776 mm and 12°C. Calculate the equivalent weight of the metal.
Answer:
weight of hydrogen÷eq weight of hydrogen=weight of metal÷equivalent weight of metal
yo formula lagayera nikalne
yesma pressure ko kei kaam hunna
Answer:
Hii,kusha
ek problem hó rahi hai mujhe
if 1.0 L of a 2.0 M solution contains 1.204 * 10^24 molecules of a solute, how many molecules of solute will 1.0 L of a 0.5 M solution contain?
The formula for molariy is nomber of moles/volume
0.5=n/1=>n=0.5 moles
one mole contains 6.023*10^23 molecules
so 0.5 contain 3.0115*10^23 molecules
What characterizes an electrolytic cell?
A. It requires added energy
B. It acts as a battery
C. It reacts spontaneously
D. It has a positive voltage
Answer:
It requires added energy.
Explanation:
An electrolytic cell uses external energy to initiate the non-spontaneous chemical reaction. The cell is characterized by the addition of energy. Thus, option A is correct.
What is an electrolytic cell?An electrolytic cell is a type of electrochemical cell that undergoes non-spontaneous reactions by deriving the energy in the form of voltage from external sources.
The redox reaction occurs when the cell uses the electric current and drives them through the two half of the cell containing the reduction and the oxidation halves.
The electrolytic cells are different from the galvanic cells as the later release energy from a series of chemical reactions, whereas the former needs energy.
Therefore, the electrolytic cell uses external energy.
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What is the difference between the "metals"
bohr models and the "nonmetals" bohr models?
Answer:The main difference between the two models was about the location of the electron in an atom.
Explanation: Bohr in his model described that the electrons are revolving around the nucleus in discrete circular paths known as shells or orbits. He was not able to explain the exact or probable location of the electrons in an atom.
But, Electron cloud model which was given by Erwin Schrodinger explained the probability of finding an electron in an atom by using the emission spectra of that atom.
Hence, the main difference between these two models was on the location of electron in an atom.
Nuclear energy is currently used in which three kinds of vehicles? O cars, submarines, spacecraft submarines, ships, spacecraft spacecraft, airplanes, cars airplanes, submarines, ships
Answer:
spacecraft, airplanes, cars
Answer: submarines, ships, spacecraft
first will get brainliest, thanks
Answer:
Explanation:
Because it could burn
Which of the following questions may best be answered by studying an organism's
chromosomes?
O What sex is the organism?
O Is the organism endangered?
O Where is the organism's ecosystem?
O How does the organism obtain its food?
Nuestion
Answer:
D
Explanation:
The study of an organism's chromosomes helps in the identification of the sex of the organisms. Thus, option A is correct.
Chromosomes have been tightly bonded DNA with the genetic information of the organism. Eukaryotic humans have consisted of 23 pairs of chromosomes.
The study of chromosomes helps in the determination of the genes types and the study of genes will be related to the traits and phenotype of the organism. Among the 23 pairs of chromosomes, one pair of chromosomes has been the sex chromosome that helps in the determination of the sex of the organism.
Thus, the study of an organism's chromosomes helps in the identification of the sex of the organisms. Thus, option A is correct.
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How much sulphur dioxide is produced on complete combustion of 1 kg of coal containing 6.23percent sulphur?
Answer:
Approximately [tex]1.24 \times 10^{2}\; \rm g[/tex], assuming that all sulfur in that coal was converted to [tex]\rm SO_2[/tex].
Explanation:
Look up the relative atomic mass of [tex]\rm S[/tex] and [tex]\rm O[/tex] on a modern periodic table:
[tex]\rm S[/tex]: [tex]32.06[/tex].[tex]\rm O[/tex]: [tex]15.999[/tex].Convert the unit of the mass of coal to grams:
[tex]\begin{aligned} & m(\text{coal})= 1\; \rm kg \times \frac{10^{3}\; \rm g}{1\; \rm kg} = 1000\; \rm g\end{aligned}[/tex].
Mass of sulfur in that much coal:
[tex]m(\text{sulfur}) = 1000\; \rm g \times 6.23\% = 62.3\; \rm g[/tex].
The relative atomic mass of sulfur is [tex]32.06[/tex]. Therefore, the mass of each mole of sulfur atoms would be [tex]32.06\; \rm g[/tex]. Calculate the number of moles of atoms in that [tex]62.3\; \rm g[/tex] of sulfur:
[tex]\begin{aligned}& n(\text{S})\\&= \frac{m(\mathrm{S})}{M(\mathrm{S})}\\ &= \frac{62.3\; \rm g}{32.06\; \rm g \cdot mol^{-1}} \approx 1.94323\; \rm mol\end{aligned}[/tex].
Each [tex]\rm SO_2\![/tex] molecule contains one sulfur atom. Therefore, assuming that all those (approximately) [tex]1.94323\; \rm mol\![/tex] of sulfur atoms were converted to [tex]\rm SO_2[/tex] molecules through the reaction with [tex]\rm O_2[/tex], (approximately) [tex]1.94323\; \rm mol[/tex] of [tex]\!\rm SO_2[/tex] molecules would be produced.
Calculate the mass of one mole of [tex]\rm SO_2[/tex] molecules:
[tex]\begin{aligned}& M(\mathrm{SO_2})\\ &= 32.06 + 2\times 15.999 \\ &= 64.058\; \rm g \cdot mol^{-1}\end{aligned}[/tex].
The mass of that [tex]1.94323\; \rm mol[/tex] of [tex]\rm SO_2[/tex] molecules would be:
[tex]\begin{aligned}& m(\mathrm{SO_2}) \\ &= n(\mathrm{SO_2}) \cdot M(\mathrm{SO_2}) \\ &\approx 19.4323\; \rm mol \\ &\quad \times 64.058\; \rm g \cdot mol^{-1} \\ &\approx 1.24\times 10^{2}\; \rm g\end{aligned}[/tex].
What's the volume ratio of two KOH solutions with conentrations of 10^-2M and 10^-4M to obtain a solution with a pH=11?
I care more about how it's solved
We know, pH + pOH = 14
pOH = -log[OH⁻]
11 = -log[OH⁻]
log[OH⁻] = -11
[OH⁻] = 10⁻¹¹ M
For 10⁻⁴ M of solution, volume required is :
10⁻⁴ × 1 = 10⁻¹¹ × V₁
V₁ = 10⁷ units.
Similarly for 10⁻² M :
10⁻² × 1 = 10⁻¹¹ × V₂
V₂ = 10⁹ units.
Therefore, the ratio of volume is 10⁷/10⁹ = 10⁻² units.
Please help,due in one hour I only need the number of atoms of each element
Answer:
Sodium sesquicarbonate
Sodium carbonate, Na2CO3, (also known as washing soda, soda ash and soda crystals) is the inorganic compound with the formula Na2CO3 and its various hydrates. All forms are white, water-soluble salts that yield moderately alkaline solutions in water. Is surrounded roughly tetrahedrally by four atoms, two sodiums and two oxygens. As commonly observed in hydrate structures, the water oxygen is surrounded in this way by two cations and two anions, and in this matter sodium sesquicarbonate obeys the usual rule.
Sodium (Na), chemical element of the alkali metal group (Group 1 [Ia]) of the periodic table. Sodium is a very soft silvery-white metal.
Sodium is a chemical element with the symbol Na (from Latin "natrium") and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table. Its only stable isotope is 23Na.
The common name for the chemical compound with the formula 3H2O is water. The H2O part is the formula for water. The 3 means that there are 3 molecules of water.
3H2O has 6 hydrogen atoms and 3 oxygen atoms.
Carbon monoxide (Co)
Carbon monoxide is a colorless, odorless gas. Prolonged exposure to carbon monoxide rich atmospheres may be fatal. It is easily ignited. It is just lighter than air and a flame can flash back to the source of leak very easily. Under prolonged exposure to fire or intense heat the containers may violently rupture and rocket.
Carbon monoxide is a colorless, odorless, tasteless gas. A molecule of carbon monoxide (CO) contains one carbon atom and one oxygen atom.
Iron oxide or ferric oxide is the inorganic compound with the formula Fe2O3. It is one of the three main oxides of iron, the other two being iron(II) oxide (FeO) the rarer form, and iron(II,III) oxide (Fe3O4) which naturally as magnetite. Since atoms are not divisible into halves, we should instead say that in the ferric molecule there are 3 oxygen atoms for every 2 iron atoms. Thus, (Fe is the symbol for an iron atom, and O is the symbol for an oxygen atom) the ferrous oxide molecule is FeO, and the ferric oxide molecule is Fe2O3.
Aluminium hydroxide, Al(OH)₃, is found in nature as the mineral gibbsite and its three much rarer polymorphs: bayerite, doyleite, and nordstrandite. Aluminium hydroxide is amphoteric in nature, i.e., it has both basic and acidic properties. 1 atom.
Hope this is what you are looking for!
Explanation:
Brainliest please?
True or false
The maximum number of electrons in the second energy level of an
atom is 4.
Calculate the total bond energy of H20. Show your work.
Why is the SI unit for force Newton's?
Answer:
The newton (symbol: N) is the SI unit of force. It is named after Sir Isaac Newton because of his work on classical mechanics. A newton is how much force is required to make a mass of one kilogram accelerate at a rate of one metre per second squared.
Explain how humans acquire the energy to function.Explain the process of cellular respiration and how we obtain this energy.
Answer:
energy = heat = producers = consumer animals =
decomposers = heat
Explanation:
this is the best
A student described two properties of a substance as shown.
Properties of Substance
Property Description
X The substance catches fire easily.
Y A substance spontaneously explodes when exposed to other substances.
Which of the following is true about the two properties described in the table?
Both are physical properties.
Both are chemical properties.
X is a chemical property and Y is a physical property.
X is a physical property and Y is a chemical property.
Answer:
X is a chemical property and Y is a physical property.
Explanation:
i did it.
The branch of science which deals the chemicals is called chemistry.
The correct answer of the following is B.
The compound has the different properties that are:-
Chemical Physical.According to the question, the X is the substance that catches fire easily which shoes the physical nature of the substance, and the Y is the substance that explodes when it reacts with some other compound. This signifies its chemical property as a reaction is chemical in nature.
Hence, the correct option is B.
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PLEASE HELP ME : FLOCABULARY
Renewable energy resources are those that can be replaced in a short time. Solar energy and wind energy, for instance, are renewed constantly by the sun and wind. Solar energy can be collected in large panels called solar cells, which collect sunlight and convert it into electrical or thermal energy. Wind energy is caused by the uneven heating of the Earth's surface. The kinetic power of wind can be used to turn windmills, which can then be used to generate electricity.
Water energy is really a form of gravitational potential energy collected by storing water in a reservoir behind a dam. As the water falls through pipe, its potential energy is converted into kinetic energy and used to turn a turbine. The turbine produces a stream of electrons or electrical energy called hydroelectric power.
Geothermal energy is energy that comes from the heat found inside Earth's crust. Like the sun, nuclear reactions deep inside the Earth generate thermal energy. Where it can be found close to the surface of the crust, geothermal energy is almost unlimited; however, it is only found at thin points in the crust, in areas prone to volcanoes and earthquakes.
Which of the following describes geothermal energy in use?
A
A drought in recent years has lowered the amount of hydroelectric power produced by the Hoover Dam.
B
The wide open land and strong gusts of the Greater Accra region in Ghana make it a perfect location for multiple turbines.
C
Iceland is situated on top of multiple volcanoes and harnesses this natural power to heat the roads and sidewalks in the winter.
D
Innovators are working to create panels to replace asphalt on highways, so roadways can generate energy from the sun even as cars burn fossil fuels.
Answer:
The is D
Explanation:
Innavators creating panels to replace asphalt
Jorge traveled 5 miles to school. After school, he traveled 1 mile to the Boys and Girls club and then he traveled 6 miles back home. What was the distance of Jorge's trip?
Answer:
12 miles
Explanation:
From home to school = 5 miles
From school to Boys and Girls club = 1 mile
From Boys and Girls club to home = 6 miles
Total distance covered by Jorge = 5 + 1 + 6 = 12 miles
Hence, the distance of Jorge's trip is 12 miles.
Should I use flex seal to clean a baby
O yes
O no
O fish are wet birds
O penguins are to dumb to fly
Limescale removers contain sulfamic acid, H3NSO3, which reacts with minerals in hard water
stains such as calcium carbonate: 2H3NSO3 +CaCO3 + Ca(SO3NH2)2 + CO2 + H2O.
How many moles of calcium carbonate will react with 0.75 moles of sulfamic acid?
Answer:
0.375 moles of CaCO₃ are required
Explanation:
Given data:
Number of moles of sulfamic acid = 0.75 mol
Number of moles of calcium carbonate required = ?
Solution:
Chemical equation:
2H₃NSO₃ + CaCO₃ → Ca(SO₃NH₂)₂ + CO₂ + H₂O
Now we will compare the moles of H₃NSO₃ and CaCO₃ .
H₃NSO₃ : CaCO₃
2 : 1
0.75 : 1/2×0.75 = 0.375 mol
Thus, 0.375 moles of CaCO₃ are required.
The moles of the product and the reactant in the reaction is given by the stoichiometric law. The moles of calcium carbonate in the reaction is 0.375 mol.
What is a stoichiometric law?The stoichiometric law defines that the moles of the reactant and the product in the reaction is equivalent to the stoichiometric coefficient in the balanced chemical equation.
From the given balanced chemical equation, 1 mole of calcium carbonate reacts with 2 moles of sulfamic acid.
The moles of calcium carbonate react with 0.75 moles of sulfamic acid is:
[tex]\rm 2\;mol\;H_3NSO_3=1\;mol\;CaCO_3\\0.75\;mol\;H_3NSO_3=\dfrac{1}{2}\;\times\;0.75\;mol\;CaCO_3\\ 0.75\;mol\;H_3NSO_3=0.375\;mol\;CaCO_3[/tex]
The moles of calcium carbonate in the reaction will be 0.375 mol.
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