Answer:
ionic bond
Explanation:
cation calcium looses 2 electrons to bond with two iodine atoms to form CaI2 (Calcium Iodide)
dicarbon heptasulfide chemical formula
Answer:
C2S7
Explanation:
To solve this we must be knowing each and every concept related to chemical formula. Therefore, the chemical formula for the given molecule dicarbon hepta sulfide is C[tex]_2[/tex]S[tex]_7[/tex].
What is chemical formula?A chemical formula is a scientific notation that uses atomic symbol and numerical subscripts to represent the number and types of elements contained in a molecule. A chemical formula seems to be a concise written description of an existing three-dimensional molecule.
A chemical formula characterizes a material to the atomic level. There are three sorts of chemical formulas: empirical, molecular, and structural. The chemical formula for the given molecule dicarbon hepta sulfide is C[tex]_2[/tex]S[tex]_7[/tex].
Therefore, the chemical formula for the given molecule dicarbon hepta sulfide is C[tex]_2[/tex]S[tex]_7[/tex].
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bigger size elements have low ionization energy and high shielding effect .justify the statement
Bigger size elements have low ionization energy and high shielding effect because:
Shielding effect:This effect describes the decrease in attraction between an electron and the nucleus in any atom with more than one electron shell. The more electron shells there are, the greater the shielding effect experienced by the outermost electrons.When shielding effect decreases the attraction force exerted by the nucleus increases on valence electrons.As a result, atoms will be larger.Find more information about Shielding effect here:
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How many atoms are in HCOOH₂?
Answer:
11 atoms I think
Explanation:
Answer: 3
Explanation:
I took the test!!
* The cost of table salt and table sugar is Rs 15 per kg.
and Rs 69 per kg respectively calculate their cost per mole?
Cost per mole
Table salt : Rs 0.878
Table sugar : Rs 23.63
Further explanationGiven
Cost table salt (NaCl) = 15/kg
Cost table sugar(sucrose-C12H22O11) = 69/kg
Required
cost per mole
Solution
mol of 1 kg Table salt(NaCl ,MW= 58.5 g/mol) :
[tex]\tt mol=\dfrac{1000~g}{58.5}=17.09~mol=Rs~15\rightarrow 1~mol=Rs~0.878[/tex]
mol of 1 kg Table sugar(C12H22O11 ,MW= 342 g/mol) :
[tex]\tt mol=\dfrac{1000}{342}=2.92~mol=Rs~69\rightarrow 1~mol=Rs~23.63[/tex]
Calculate the number of atoms in 2.8 moles of silicon atoms
Answer:
1.686 × 10²⁴ atomsExplanation:
The number of silicon atoms can be found by using the formula
N = n × Lwhere n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
N = 2.8 × 6.02 × 10²³
We have the final answer as
1.686 × 10²⁴ silicon atomsHope this helps you
help please
manganese atom has 30 neutrons and atomic number 25
determine the electron cloud charge of manganese
Answer:
electron cloud charge of manganese=-5
Explanation:
atomic number=number of elecron +neutron number
DATA
Neutron NO.=30
atomic NO.=25
e=?
A=e+n
25=e+30
e=25-30
e= -5
What is the kinetic energy of a population of particles?
Answer/Explanation:
The kinetic energy of a particle is one-half the product of the particle's mass m and the square of its speed v: K=12mv2.
Please help I’ll give you guys brainiest!
Thank youuuuuuu :))
Answer:
I think it's unbalanced
(I'm so sorry if it's wrong)
Hope this helps!
Answer:
unbalanced
Explanation:
The three types of ocean floor sediments are classified according to their _____.
Answer:
Origin
Explanation:
balance the equation KCIO3 → KCl + O2
Answer:
3kcl+ 02
Explanation:
in this way we can balance the chemical equation
can i have some help :'(
manganese atom has 30 neutrons and atomic number 25
calculate the atomic mass of manganese atom
The atomic mass of manganese atom : 55
Further explanationGiven
Manganese (Mn) atom has 30 neutrons
atomic number 25
Required
the atomic mass
Solution
The atomic mass=number of protons+number of neutrons
The atomic number = number of protons=number of electrons
The number of protons=25, so the atomic mass :
[tex]\tt =ptotons+neutrons\\\\=25+30\\\\=55[/tex]
What do the three types of mixtures have in common?
(colloid, solution, suspension)
Answer:
A colloid is a heterogeneous mixture in which the dispersed particles are intermediate in size between those of a solution and a suspension. The particles are spread evenly throughout the dispersion medium, which can be a solid, liquid, or gas.
Explanation:
How do the force factors compare to the products of the masses?
Answer:
The force factors are equal to the first numbers of the products of the masses in scientific notation.
Explanation:
Ex. 1.0 x 10^5 kg^2 then the force factor would be 1.
ex. 3.0 x 10^12 kg^2 then the force factor would be 3.
To solve this we must be knowing each and every concept related to scientific notation and its calculations. Therefore, in scientific notation, the force factors seem to be equivalent to the first digits of the masses' products.
What is scientific notation?Mathematics is a way of representing numbers using a decimal number ranging from one to 10, but not 10 multiplied by a factor of 10. The most common type of mathematical notation is All numbers in scientific notation are expressed in the generic form N 10m.
In scientific notation, the force factors seem to be equivalent to the first digits of the masses' products.
Example1 1.0 x 10⁵ kg² , force factor is 1.
Example2 3.0 x 10¹² kg² ,force factor is 3.
Therefore, in scientific notation, the force factors seem to be equivalent to the first digits of the masses' products.
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Are scientist improving the plant or corrupting it
Answer:
46 percent of trees have been cut down.
Scienctists helps plants, but humans do destroy a lot of plants.
Scientists - helps increase plant growth.
Woodchoppers - helps decrease plant growth.
PLS HELP How many moles of methane are in 7.31x10^25 molecules
Answer:
121.37 moles
Explanation:
I'm not sure
Answer:
1.21 x 10^2
Explanation:
What is the similarity between teeth and eggshells?
Explanation:
Because they share a similar composition, similar chemicals affect their structures in positive or negative ways. For example, fluoride – a staple in many dental practices – strengthens both enamel and eggshells and helps protect them from acids. Acids weaken and break down both substances. Scientists find this particularly concerning given that the ocean is growing increasingly acidic. They fear this may weaken the eggs of some marine species and harm their chance of survival. Most dentists recommend limiting aggressively acidic foods and beverages such as soft drinks.
1. What net ionic equation describes the reaction between Pb(NO3)2( aq) and N a2CO3( aq) ?
O 2Na t( aq) + N0, 2( aq) → 2NaNO3( s)
O Pb 2+( aq) + 2Na t( aq) → 2NaPb( s)
O Pb 2+( aq) + CO3( aq) → PBCO3( s)
O 2Na t( aq) + CO3 2( aq) → NacO3( s)
Answer: C. Pb^2+(aq) + CO3^-2(aq) —> PbCO3(s)
Explanation:
Choose all the answers that apply.
Argon (Ar) is in group 18. Argon _____.
forms a salt when combined with a metal
has 18 electron shells
has properties similar to other elements in group 18
does not react readily with other elements
is part of the noble gas group
!(more than one answer)!
Answer: has properties similar to other elements in group 18, does not react readily with other elements, is part of the noble gas group
Explanation: I’ve done on edg before
"Indicate in each whether the following electron configurations correspond to an atom in its ground state, excited state, or is impossible."
a. [tex]{1s}^{2} {2s}^{2} {2p}^{4} [/tex]
b. [tex] {1s}^{2} {2s}^{2} {2p}^{3} {2d}^{1} [/tex]
c. [tex] {1s}^{2} {2s}^{2} {2p}^{3}{3s}^{1} [/tex]
d. [tex] {1s}^{2} {2s}^{1} {2p}^{2} [/tex]
e. [tex] {1s}^{2} {2s}^{2} {2p}^{1} [/tex]
f. [tex] {1s}^{2} {2s}^{3} [/tex]
Please, I really need help. I don't know what to do...
Answer:
Explanation:
Firstly, let's define what ground and excited state electronic configuration.
Ground state electronic configuration is when the electrons of the atom are in there lowest possible energy level while excited state electronic configuration is when electron(s) have moved to a higher energy level. Examples of these are provided in the options
a. 1s²2s²2p⁴ - This is a ground state electronic configuration (of oxygen) because the electrons are in there lowest possible energy level.
b. This option is not displaying (it is displaying something like an image that isn't loading)
c. 1s²2s²2p³3s¹ - We can see from this that an electron jumped from 2p energy level to 3s (p energy level ought to be completely filled with 6 electrons before another electron moves to the next energy level) meaning the electron is in it's excited state thus this is an excited state electronic configuration (of oxygen).
d. 1s²2s¹2p² - We can see from this also that an electron jumped from the 2s energy level to the 2p energy level (making it 2p² instead of 2p¹ in the ground state). The 2s energy level should ordinarily have 2 electrons. Thus, this is an excited state electronic configuration (of boron).
e. 1s²2s²sp¹ - This is a ground state electronic configuration (of boron) since all the electrons are in there lowest possible energy level.
f. 1s²2s³ - This configuration is impossible because the s energy level should only contain a maximum of 2 electrons, thus impossible to have 3 electrons in the s energy level
2. What property of liquids explains why water beads up on the car surface?
Answer:
Surface tension is a force that pulls particles at the exposed surface of a liquid toward other liquid particles. Surface tension explains why water forms droplets, like the water droplet that has formed on the leaky faucet pictured in the Figure below.
7. Some products or processes claim to be "chemical free" or say "no chemicals added." Based on your understanding of chemistry, what are the arguments for and against such statements?
Please i need help
The meaning behind the statement is that the products does not contains any synthetic and harmful chemicals such as colourants, preservatives etc.
What are synthetic chemicals?All natural products or materials contains certain kind of chemicals which are naturally made in them. Such chemicals are natural chemicals and does not harm the living or causes any unwanted reaction.
The chemicals which are made by humans for specific purposes are called synthetic chemicals. Which can be of toxic and hazardous. Almost all materials we use everyday such as toothpastes, shampoo, food items, dyes, medicines and the fertilizers and pesticides we use in agriculture are all chemicals.
These chemicals helps in some way but they can be harmful to life in other way. Some products claim that they are chemical free, may true or not they intending to clear that the product does not contain any synthetic chemical except the required natural chemicals.
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Compare the potential energy of two atoms chemically bonded to their potential energy when separated.
Answer:
See explanation
Explanation:
The essence of chemical bonding is in order to attain minimum energy. The minimum energy state is the most stable state of a chemical system.
As the distance of separation between atoms decreases, the potential energy of the system decreases accordingly.
An optimum distance is reached when the two atoms attain the lowest potential energy. This is designated as the bond distance of the two atoms.
Hence two atoms have lower potential energy when bonded than when separated at large distance.
When two atoms are chemically bonded they have Lower potential energies while when they are separated they have higher potential energies
The potential energies of atoms chemically bonded is directly proportional to the distance between the atoms ( i.e as the distance between atoms decrease the potential energies of the atoms decreases accordingly) and this enables chemically bonded atoms to attain a more stable state.
The lower the potential energy of bonded atoms the more stable the element/compound becomes therefore it is necessary that bonded atoms attain the least possible potential energy.
Hence we can conclude that When two atoms are chemically bonded they have Lower potential energies while when they are separated they have higher potential energies .
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PLEASE HELP
Fossil fuels are burnt in power plants to produce electricity. Which one of the
following sequences show the correct order of energy transformation?
Answer:
a
Explanation:
Chemical then thermal because the carbon emissions produce heat
Then kinetic because there is energy transfer then electric because that's the finished result
Part of an important cellular process involving a DNA strand is modeled below
12000
What is the purpose of this cellular process?
F Preserving genetic information for future generations
G Deleting the information in the sequence produced from the DNA template
# Transcribing information in the DNA sequence for use by the cell
J Producing more nucleotides for the DNA sequence
Answer: transcribing information to the dna sequence for use by the cell
Explanation:
What would happen if a neutron was added to Lithium (7)
Answer:
if you add a neutron to lithium-7 it becomes a compound nucleus of lithium-8
what is the mass of H2o required to dissolve 14.5g of glucose
if the molality of solution is 0.24 molal
Answer:
Mass of water = 0.33 Kg
Explanation:
Given data:
Mass of water = ?
Mass of glucose = 14.5 g
molality of solution = 0.24 m
Solution:
Number of moles of glucose:
Number of moles = mass/molar mass
Number of moles = 14.5 g/ 180.156 g/mol
Number of moles = 0.08 mol
Mass of water:
Molality = number of moles of solute / Kg of solvent
0.24 m = 0.08 mol / Kg of solvent
Kg of solvent = 0.08 mol / 0.24 m
Kg of solvent = 0.33 Kg
Hello Hi so um... I don't know what to say so um... yeah MOLLOC WAS HERE!!!!!!!!!!!!!!!!
Answer:
hi nice to meet you, just be your self and ask your questions, its all good we are nice people
Explanation:
have a great day, please mark as brainliest please
Hello! Be ur self, ask questions and ask questions. Okibye
It takes 7.21 1019 J of energy to remove an electron from an iron atom. What is the maximum wavelength of light that can do this
Answer:
2.75 × 10^-45 m
Explanation:
From;
E= hc/wavelength
h= Plank's constant= 6.6 × 10^-34 Js
c= speed of light=3× 10^8 ms-1
Wavelength = 6.6 × 10^-34 × 3× 10^8/7.21 × 10^19
Wavelength= 2.75 × 10^-45 m
how is wind energy captured?
where is wind energy found?
how is water energy captured?
where is water energy found?
plz use the passage i put. plz and thank you!!!!!
which is a greater threat to a mountain ecosystem: a beetle that kills coniferous trees or a wolf thats hunts and eats deer?
Answer:
Explanation:
The mountain ecosystems are characterized by coniferous tree species such as pinus, firs, and spruces and species such as deers, bears, and wolves.
A beetle that kills coniferous trees would be a greater threat to the ecosystem than a wolf that hunts and eat deer because the dominant trees in the ecosystem are conifers. Hence, a beetle that kills coniferous trees might end up killing the dominant tree species in the ecosystem and this will gravely affect other plant and animal species within the ecosystem.
Wolves and deers have their niche in the mountain ecosystem already and hence, their populations are naturally limited by limiting factors of the environment. Hence, a wolf that hunts and eats deers would be of a lesser threat to the mountain ecosystem.