Answer:Gained, Lost , Shared
Explanation:
The oxidation state tells you how many electrons an atom has GAINED.................. , LOST....................... , or SHARED........................ , in forming a compound.
Oxidation state is defined as the the total number of electrons that an atom gains or loses when forming a chemical bond with another atom.
----To form an ionic bond for example in NaCl, Na, with 11 electrons and one valence electron in its outermost shell donates or lose that valence electron to Chlorine with 17 electron and 7 in its outermost shell. Therefore Sodium, Na acquires the +1 oxidaton state to become stable and Chlorine acquires the -1 oxidation state to become stable forming the NaCl compound.
To form a covalent compound, There must be sharing of electrons between atoms.For example, in PCl3, The phosphorous atom with atomic number 15 shares its three unpaired electrons with the single valence electrons of three chlorine atoms. making the four molecules to attain stability with Phosphorous having +3 and the chlorine atoms having -1 oxidation states
What best describes the bonding in a carbon dioxide molecule?
a. Carbon transfers two electrons to each of the two oxygen atoms.
b. Carbon shares 2 pairs of electrons with each oxygen.
c. Carbon shares a pair of
electrons with each oxygen atom.
d. Carbon receives two electrons from each of the two oxygen atoms.
Answer:
B. Carbon shares 2 pair of electrons with each oxygen.
Explanation:
Carbon dioxide is formed from combustion reactions, which involves a reaction between carbon and oxygen gas. Carbon dioxide molecule is formed from one carbon atom and two oxygens. As an element, carbon only has 4 outer shell electrons and oxygen 6. The two atoms require to gain electrons to achieve a stable configuration; carbon require to gain four electrons and oxygen requires two electrons. Double covalent bonds form between the atoms, where two electrons from each atom are shared making 4 bonding electrons in total.Hope it helped!
mass = 325.2 volume = 62.5 cm what's the density ?
Answer:
159571 lb or cubic feet
Explanation:
PLEASE ANSWER!!! NEED HELP!!!
In the reaction MgC12 + 2KOH Mg(OH)2 + 2KCl, if 1 mole MgC12 is added to
3 moles KOH, what is the limiting reagent?
KCI
Mg(OH)2
KOH
MgCl2
Answer:
For 1 mole of MgCl2, it would require 2 moles of KOH. ( 1 : 2 mole ratio)
Since you have 3 moles of KOH, it is in excess, and MgCl2 is the limiting reactant.
An angry science student drops his textbook out of a second story window. Why does it fall to the ground? You may
choose more than one response.
A.The net force acting on the book by gravity is down.
B The drag force of the air pulls it down.
The student let the book go, removing the force of his hand.
D There is a strong magnetic force between the book and the ground.
Answer:
I think qs. "A" the net force acting on the book by gravity is down..
The statement is "The net force acting on the book by gravity is down."
What is gravity?Gravity is defined as the force that pulls materials toward the center point of a planet or other entity.
The textbook falls to the ground because of gravitational attraction between the ground and the book.
Because of the Earth's gravitational influence, the textbook moves towards the Earth when nothing is keeping it up. We know that the book has an equivalent impact on the Earth.
With a free fall acceleration of g, the textbook accelerates toward the Earth.
Hence, the correct option is A
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List and describe three types of clouds.
Type here:
Plz hurry
Answer:
Cumulus clouds look like fluffy, white cotton balls in the sky. Since they are so thin, they seldom produce much rain or snow.
Cumulonimbus clouds are menacing looking multi-level clouds, extending high into the sky in towers or plumes. More commonly known as thunderclouds, cumulonimbus is the only cloud type that can produce hail, thunder and lightning.
Nacreous clouds are some of the rarest clouds on the planet. They are a form of polar stratospheric cloud, which is a main culprit in chemical destruction of the ozone layer.
Explanation:
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For each of the following substances below, identify the type of bonding between the atoms. Justify your
reasoning
Answer:
SF4 -Covalent bond
BaBr2 - Ionic bond
Ca - Metallic bond
Explanation:
Sulphur and fluorine are non metals. Nonmetal atoms combine by the sharing of electrons. This is also called a covalent combination(bond).
In BaBr2, a metal is combined with a nonmetal. This combination involves a transfer of electrons from the metal to the nonmetal forming an ion pair. This is otherwise called an ionic bond.
Atoms of a metal are held together by strong metallic bonds that involves positively charged cations and a cloud of electrons.
21. For each of the following precipitation reactions,
complete and balance the equation, indicating
clearly which product is the precipitate. If no reaction
would be expected, so indicate.
a. (NH4)2SO4(aq) + Ba(NO3)2(aq) →
b. HS(aq) + NiSO4(aq) →
c. FeCl3(aq) + NaOH(aq) →
How does heat cause ocean currents
The radius of a basketball hoop is 9 inches. Which expression can be used to find the
hoop's circumference in inches?
Answer:
2 [tex]\pi[/tex] r
Explanation:
Given that:
Radius of basketball = 9inches
Unknown:
Hoop's circumference = ?
Solution:
To solve this problem, we use the formula for the circumference of a circle.
The shape of the hoops is circular.
Circumference of a circle = 2 [tex]\pi[/tex] r
R is the radius of the basketball hoop
Bohr's model of the atom attempts to explain the idea that:
A) protons and neutrons are found in the nucleus
B) all atoms of one type of element are identical
C) energy is quantized
D) the atom is mostly empty space
It attempts to explain the idea that:C. energy is quantized
how are waves reflected, absorbed, and transmitted through various materials
Answer:
Electromagnetic Radiation
Explanation:
When light shines on an object, it is reflected, absorbed, or transmitted through the object, depending on the object's material and the frequency (color) of the light. However, because light can travel through space, it cannot be a matter wave, like sound or water waves.
How many grams of water are produced from the decomposition of 63 grams of lithium hydroxide
(LiOH)?
Answer:
18.65004 grams H2O
Explanation:
First, we need to write down the balanced chemical equation for the decomposition reaction:
2LiOH -> H2O + Li2O
Since we have grams of LiOH and we need to know the grams of water, we need to convert to moles since we can only compare moles to moles.
The amu of LiOH is 23.947.
The given grams of LiOH is 63.. To convert to moles, we will divide 63 by 23.947..
This gives us 2.6310 moles LiOH..
To convert to moles of H2O (and later grams of H2O), we will use the mole fractions from the balanced equation...
When we look at the balanced equation we can see that 2 moles of LIOH can produce 1 mol of Water, so:
2.6310 moles [tex]* \frac{1 molH_{2}O}{2 mol LiOH}[/tex] = 1.3155 moles H2O
Now we will convert from moles to grams (we must multiply by the amu)
1.3155 moles H2O = 18.65 grams H2O
According to stoichiometry of the chemical equation of decomposition of lithium hydroxide 23.6 g of water are produced from the decomposition of 63 grams of lithium hydroxide.
What is stoichiometry?Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.It is useful in balancing chemical equations.
In the given example, as 47.9 g of lithium hydroxide produces 18 g water ,therefore 63 of lithium hydroxide will produce 63×18/47.9=23.6 g of water.
Thus, 23.6 g of water are produced from the decomposition of 63 grams of lithium hydroxide.
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A 10.0 g sample of water was heated from 20.0°C to 50.0°C. How much energy did the water gain? The specific heat of water is 4.18 J/g·°C. 836 J 836 J 1250 J 1250 J 2920 J 2920 J 4180 J
Answer:
1254 J
Explanation:
Mass, m = 10.0g
Initial Temperature = 20°C
Final Temperature = 50°C
Energy = ?
Specific heat capacity, c = 4.18 J/g·°C
The relationship between these quantities is given by the equation;
H = mcΔT
ΔT = Final Temperature - Initial Temperature = 50 - 20 = 30 °C
H = 10 * 4.18 * 30
H = 1254 J
Answer:
Explanation:
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Sex cells are produced by the process of mitosis.
True
False
Answer:
True is the Answer.
Explanation:
True.
Help Please with this
A 5.5 kg rifle fires an 11 g bullet with a velocity of 1000 m/s. (a) What is the recoil velocity of the rifle? (b) If the shooter holds the rifle firmly against his shoulder, What will be the recoil velocity? Assume the mass of the shooter is 120 kg.
Please answer seriously (;´༎ຶٹ༎ຶ`)
Given,
Mass of a rifle = 5.5 kg
Mass of a bullet = 11 g
Speed of a bullet = 1000 m/s
To find,
(a) The recoil velocity of the rifle.
(b) If the shooter holds the rifle firmly against his shoulder, What will be the recoil velocity.
Solution,
(a) Let v₁ is the recoil velocity of the rifle. We can use the conservation of momentum to find it. The momentum of the system will remains conserved.
[tex]m_1v_1=m_2v_2\\\\v_1=\dfrac{m_2v_2}{m_1}\\\\v_1=\dfrac{0.011\times 1000}{5.5}\\\\v_1=2\ m/s[/tex]
So, the recoil velocity of the rifle is 2 m/s and it is in opposite direction of he bullet.
(b) Let V is the recoil velocity if the shooter holds the rifle firmly against his shoulder. Again using the conservation of momentum.
[tex]V=\dfrac{0.011\times 1000}{120}\\\\v=0.091\ m/s[/tex]
Therefore, this is the required solution.
Between carbon and silicon, which element has the strongest attraction between its nucleus and its valence electrons? Explain?
Answer:
Between carbon and silicon, silicon element has the strongest attraction between its nucleus and its valence electrons.
because silicon's nucleus is bigger than carbon.silicon loses electrons easily than carbon.
What is the electron dot structure for beryllium and oxygen when they combine into a compound
Answer:
The formula unit for beryllium oxide is BeO
Explanation:Mark me as brainliest
What is the percent composition of Cs in CsPO4?
Answer:
58.3%
Explanation:
The formula of the compound is given as:
CsPO₄
Now, the percentage composition of Cs in the compound is = ?
So;
To find this parameter, find the molar mass of the compound:
Molar mass of CsPO₄ = 132.9 + 31 + 4(16) = 227.9g/mol
Percentage composition of Cs= [tex]\frac{132.9}{227.9} x 100[/tex] = 58.3%
some students using Apple to represent the Earth what is the best reason to use an Apple for this comparison?
Answer:
The skin of the apple is very thin, and the crust of the Earth is very thin.
Which part of the mouth carries out each function? breaks down carbohydrates into sugars: cuts up food into smaller pieces:
Answer:
Saliva and teeth in this order
Explanation:
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Discuss electrochemical principle about rusting of iron
Answer:
The electrochemical phenomenon of rusting of iron can be described as : At Anode: Fe (s) undergoes oxidation to releases electrons. Electrons released at anode move to another metal and reduce oxygen in presence of H+. It is available from H2CO3 formed from the dissolution of CO2 from air into water.
Plz help asap What can you conclude about the iron(ii) and iron(iii) ions?
Answer:
The chemistry of iron is dominated by the +2 and +3 oxidation states i.e. iron(II) and iron(III) complexes e.g. Fe2+ and Fe3+ complex ions with selected ligands, usually of an octahedral shape, a few tetrahedral iron(III) complexes are mentioned too. The reactions of the aqueous ions iron(II) and iron(III) with ammonia, sodium hydroxide and sodium carbonate are described and explained as are complexes of iron(III) with the chloride ion and cyanide ion.
principal oxidation states of iron, redox reactions of iron, ligand substitution displacement reactions of iron, balanced equations of iron chemistry, formula of iron complex ions, shapes colours of iron complexes, formula of compoundsExplanation:
AYOO SMART PEOPLE I NEED HELP on number 6
Answer:
6.) mixture
8.) compound
which of the following represents the greatest number of moles? please help! :)
Answer:
Helium
Explanation:
He- 3.99739969150064 (4)
S-0.498986433806336 (0.5)
Li-3.02550064832148 (3)
B-2.959948200906496 (3)
A 15.33 g sample of magnesium oxide is found to contain 12.67 g of magnesium. What is the percent (by mass) composition of the magnesium in the compound?
___co+__ Na2s--> ___ Na+ ___ cos2
Answer: [tex]Co+2Na_2S\rightarrow 4Na+CoS_2[/tex]
Explanation:
According to law of conservation of mass, mass can neither be created nor be destroyed. The atoms on the reactant side must be equal to the number of atoms on the product side so that the mass remains the same on reactant and product side. Thus the reactions are balanced.
Single displacement reaction is one where a more reactive element replaces the lesser reactive one.
The balanced chemical reaction will be:
[tex]Co+2Na_2S\rightarrow 4Na+CoS_2[/tex]
The discovery of protons and electrons most directly refuted or replaced the idea that
a. atoms contain a nucleus
b. the atom resembles plum pudding
c. the atom is electrically neutral
d. the atom is indivisible
Given the unbalanced equation: ____ CaSO4 + ___AlCl3 --> ____ Al2(SO4)3 + _____ CaCl2
What is the coefficient of Al2(SO4)3 when the equation is completely balanced using the smallest whole-number coefficients?
Answer:
3CaSO₄ + 2AlCl₃ → Al₂(SO₄)₃ + 3CaCl₂
Explanation:
The reaction expression is given as:
_CaSO₄ + _AlCl₃ → _Al₂(SO₄)₃ + _CaCl₂
To balance the reaction above, let us a mathematical approach;
assign coefficients a, b, c and d to the species;
aCaSO₄ + bAlCl₃ → cAl₂(SO₄)₃ + dCaCl₂
Conserving Ca : a = d
S: a = 3c
O: 4a = 12c
Al: b = 2c
Cl: 3b = 2d
So;
let a = 1, d = 1, c = [tex]\frac{1}{3}[/tex] , b = [tex]\frac{2}{3}[/tex]
Multiply by 3 through;
a = 3, b = 2, c = 1 and d = 3
3CaSO₄ + 2AlCl₃ → Al₂(SO₄)₃ + 3CaCl₂