Each Hydrogen atom has 1 valence electron. Since Hydrogen can only fit a max of 2 valence electrons in its orbital, each Hydrogen atom only needs 1 electron. Each atom has 1 valence electron, so they can just share, giving each atom two electrons each.
What is the electron configuration for an electrically neutral atom of oxygen?
Use the periodic table.
Responses
1s22s2
1 s 2 2 s 2
1s22s22p4
1 s squared 2 s squared 2 p to the power of 4
1s22s22p44d2
1 s squared 2 s squared 2 p to the power of 4 4 d squared
1s22s22p6
Answer:
1s2 2s2 2p4
Explanation:
A wave's frequency is 8.50x10^14 s-1. What is the wavelength?
Based on the given frequency of the wave, the wavelength of the wave is 3.75 * 10⁻⁷ m.
What is the relationship between the frequency and wavelength of a wave?The frequency of a wave is the number of complete oscillations performed by the wave per second.
The wavelength is the distance between successive points on the wave.
The relationship between the wavelength and frequency of a wave is given below:
Wavelength = velocity / frequency
Assuming the given wave is an electromagnetic wave, the velocity of the wave is 3.0 * 10⁸ m/s
Wavelength = 3.0 * 10⁸ m/s / 8.50 * 10¹⁴ s⁻¹
Wavelength = 3.75 * 10⁻⁷ m
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Just answer 11 and i will mark brainlest
A compound is formed by the combination of two or more different atoms. The white dot and black dot in the image are two different elements which combines together to form the compound AB.
What are compounds?Atoms are the basic units of every substances. Atoms combines to form molecules and molecules combines to form compounds. Thus compounds are chemical substances formed by the combination of different atoms.
For instance two oxygen atoms combines to form O₂ molecule similarly H₂, N₂ etc. can be formed from their respective atoms. When atoms of two different elements combines together they form compounds such as H₂O CO₂ etc.
These compounds can be formed through a specific type of chemical bonding such as ionic bonding, covalent bonding etc. The bond type depends on the nature of bonding atoms.
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I need help on this question please. This is not graded. Thank you.
Which of the following is an example of an unbalanced force?
A A computer on a table
B A man leaning against a wall
C A girl serving a volleyball
D Fruit in a bowl
Explanation:
C
as the girl applies a resultant force on the volleyball causing it to accelerate, there's an unbalanced force acting on the ball.
Magnesium acts similar to sodium when forming an ionic bond in terms of losing or gaining electrons.
What is the most likely way in which an atom of magnesium (Mg) will satisfy the octet rule when it forms bonds?
The most likely way in which an atom of magnesium (Mg) will satisfy the octet rule when it forms bonds is by losing two electrons.
What is the octet rule?The octet rule is described as a chemical rule of thumb that reflects the theory that main-group elements tend to bond in such a way that each atom has eight electrons in its valence shell, giving it the same electronic configuration as a noble gas.
The octet rule is held responsible for the relative inertness of the noble gases and the chemical behavior of certain other elements.
Magnesium (Mg) will satisfy the octet rule when it forms bonds is by losing two electrons.
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Answer:
by losing two electrons
Explanation:
I got it right on edge 2023
good luck
I need help with question 10 please
Answer:
Na,Ba,Ti on the same base placement on the periodic table.
Answer:
O,S,Se
Explanation:
Because they lose electrons and become an anion to become ionicly bonded and they are in the same period
How many liters of water are produced from the combustion of 2.5 moles of methane gas?
Answer:
this is your answer 1234
What is the coefficient of HCl when the equation is balanced with smallest whole numbers?
MnO2 + HCl → MnCl2 + Cl2 + H2O
3
2
4
8
If an atom has 5 valance electrons, it will need to
gain 3
gain 8
gain 0
lose 4
electron(s) in order to become stable?
Answer: gain 3
Explanation:
elements want to have a total of 8 valence electrons to become stable like the noble gases! Hope this Helps.
How many moles are there in 215 grams of water?
Answer:
13.89
Explanation:
13.89 moles (mole =mass)
(photosynthesis)
carbon dioxide water glucose/sugar oxygen
6CO2 + 6H2O + heat
–––––––→ C6H12O6 + 6O2
←––––––––
(respiration)
Number of Number of
Elements: C___ Elements: C___
O___ O___
H___ H___
Analyze and Interpret Data
1. Reason Quantitatively In the reaction above, some molecules have a number in front of
the formula showing how many molecules it takes for the reaction to occur. Tally the
number of elements on each side of the reaction and record the values above.
2. Describe Patterns Describe how the number of elements compare on each side of the
The reaction the reversible reaction is given as :
6CO₂ + 6H₂O + Heat ⇄ C₆H₁₂O₆ + 6O₂
The photosynthesis is to convert carbon dioxide and water and light in into glucose and oxygen.
photosynthesis :
6CO₂ + 6H₂O + Heat ------> C₆H₁₂O₆ + 6O₂
In cellular respiration organism release energy stored in the chemical bond of glucose.
C₆H₁₂O₆ + 6O₂ -----> 6CO₂ + 6H₂O + Heat
The reversible reaction can be as follows :
6CO₂ + 6H₂O + Heat ⇄ C₆H₁₂O₆ + 6O₂
reactants products
C 6 6
H 12 12
O 18 18
The number of atoms present in reactant side is equal to the number of atom in product side. the equation is balanced.
6 moles of carbon dioxide produce 1 mole of oxygen
6 mole of water produce 1 mole of carbon dioxide
Thus, the reversible reaction given as:
6CO₂ + 6H₂O + Heat ⇄ C₆H₁₂O₆ + 6O₂
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9. It says its wrong? someone help!
The balanced net ionic equation for the reaction between potassium sulfide and lead(II) nitrate is Pb²⁺(aq) + S²⁻(aq) → PbS(s)
Writing balanced net ionic equation for a reactionFrom the question, we are to write the balanced net ionic equation for the given chemical reaction.
The given chemical reaction is
K₂S(aq) + Pb(NO₃)₂(aq) →
The between potassium sulfide and lead(II) nitrate will produce potassium nitrate and lead sulfide.
That is,
K₂S(aq) + Pb(NO₃)₂(aq) → KNO₃(aq) + PbS(s)
Now, balance the equation
K₂S(aq) + Pb(NO₃)₂(aq) → 2KNO₃(aq) + PbS(s)
Write the complete ionic equation
2K⁺(aq) + S²⁻(aq) + Pb²⁺(aq) + 2NO₃⁻(aq) → 2K⁺(aq) + 2NO₃⁻(aq) + PbS(s)
Cancel out the spectator ions
S²⁻(aq) + Pb²⁺(aq) → + PbS(s)
Hence, the balanced net ionic equation is
Pb²⁺(aq) + S²⁻(aq) → PbS(s)
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How is the water cycle affected when the sun comes out?
A. Rain Freezes
B. Rain becomes sweet
C. Nothing Happens
D. Rain evaporates
Answer:
option d rain evoporates
Answer:
D. Rain Evaporates
Explanation:
Heat causes liquid and frozen water to evaporate into water vapor gas, which rises high in the sky to form clouds. Clouds move over the globe and drop rain and snow.
What is the specific heat of a 95.01 g piece of an unknown metal that exhibits a 45.2°C temperature change upon absorbing 1870 J of heat?
The specific heat of a 95.01 g piece of an unknown metal that exhibits a 45.2°C temperature change upon absorbing 1870 J of heat is 0.44J/g°C.
How to calculate specific heat?The specific heat capacity of a metal can be calculated using the following:
Q = mc∆T
Where;
Q = quantity of heat absorbed or released (J)m = mass of substance (g)c = specific heat capacity∆T = change in temperature (°C)According to this question, a 95.01 g piece of an unknown metal exhibits a 45.2°C temperature change upon absorbing 1870 J of heat. The specific heat capacity can be calculated as follows:
1870 = 95.01 × c × 45.2
1870 = 4294.452c
c = 0.44J/g°C
Therefore, 0.44J/g°C is the specific heat capacity of the metal.
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I need help with #2 please
Answer:
Third choice
Explanation
Because reactivity of the elements decrease across the periodic table and it depends on the number of protons it has. Hence low number of protons more reactive.
Consider a transition of the electron in the hydrogen atom from n=4 to n=7. Determine the wavelength of light that is associated with this transition.
The wavelength that is associated with the transition is 2145 nm.
What is the wavelength?We know that the wavelength can be obtained from the use of the Rydberg equation and we know that the Bohr's mode lets us know that an electron can move from from a higher to a lower energy level.
Let us write;
1/λ = RH(1/[tex]n_{2} ^2[/tex] - 1/[tex]n_{1} ^2[/tex])
λ = wavelength
RH = Rydberg constant
[tex]n_{1}[/tex] = initial level
[tex]n_{2}[/tex] = final level
Then;
1/λ = 1.097 * 10^7 (1/4^2 - 1/7^2)
1/λ = 1.097 * 10^7 ( 0.0625 - 0.020)
λ = 2145 nm
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a sample of an unknown gas has a volume of 8.00L at 1.00 atm and 25.0°C. How many moles of gas are present
Answer:
0.3269
Explanation:
You would use the ideal gas law along with the equation Pv=nrt when P is pressure, v is volume, n is the moles of gas you are solving for, r is a constant that is , and t is temperature,
So you are given pressure, volume, and temperature, so you would begin by plugging in your known values:
P = 1atm
V = 8.00 L
T = 298 K ( but you usually want to use Kelvin so you would add 273.15; this is because 0 C is 273.15 K and 25+273=298)
(1)(8)=n(0.0821)(298)
then
8=n(24.4658)
next isolate n by dividing 24.4658 on each side
8/24.4658 = n (24.4658/24.4658)
0.3269=n(1) or n
How many grams of a 12.5 % sugar solution contain 56.0 g of sugar?
Considering the definition of percentage by mass, 448 grams of a 12.5 % sugar solution contain 56.0 g of sugar
Percentage by massThe percentage by mass expresses the concentration and is defined as the ratio of the mass of the solute to the mass of the solution, expressed as a percentage.
The percentage by mass is calculated as the mass of the solute divided by the mass of the solution, the result of which is multiplied by 100 to give a percentage:
percent by mass= (mass of solute÷ mass of solution)×100%
Mass of sugar solutionIn this case, you know:
percent by mass= 12.5%mass of sugar= 56 gmass of solution= ?Replacing in the definition of percent by mass:
12.5%= (56 g÷ mass of solution)×100%
Solving:
12.5%÷ 100%= 56 g÷ mass of solution
12.5%÷ 100%= 56 g÷ mass of solution
0.125= 56 g÷ mass of solution
0.125× mass of solution= 56 g
mass of solution= 56 g÷ 0.125
mass of solution= 448 g
Finally, the mass of solution is 448 grams.
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What is the common use of minerals?
Answer:
Make Li-Ion batteries.
Produce commercial electric vehicles.
Create underwater subsea electrification.
Power telecommunication devices.
Explanation:
Minerals are essential raw materials in our daily lives, and are vital for economic, social and technological development. For example, in the following:
Agriculture: Phosphate rock, potash and lime are used in agricultural fertilisers and other mineral products are used to improve soil. The water you drink uses minerals to make it clean.
Construction: About 60 tonnes of aggregate are used to build an average house in the UK. If we include the associated infrastructure, this can be as high as 400 tonnes.
Minerals are used in building houses, schools, libraries, hospitals, offices and shops. Buildings use a wide range of minerals:
iron (as steel) in the framework of large building,
clay in bricks and roofing tiles,
slate for roofing tiles,
limestone, clay, shale and gypsum in cement,
gypsum in plaster,
silica sand in window glass,
sand and gravel and crushed rock as aggregates for fill and in concrete,
copper for plumbing and wiring,
clays for bathroom fixtures and fittings and tiles,
paint may include pigments, extenders and fillers from mineral sources.
Answer: toothpaste
Explanation:
5 steps to describing bonding:
●
Identify the type of bonding (if not in question)
Describe if electrons are being lost, gained or
shared by each atom
Describe how this changes the atoms involved
e.g. forms Mg2+" (formula of ion) or becomes
stable (gain a full outer shell)
Add a formula for the compound formed if
asked e.g. Mg₂Cl or HCI
Describe the bonding in magnesium oxide using these
steps include the formula for lithium oxide
The electrons that are being lost gained or shared by each atom are Shared electrons.
Atoms and chemical species lose and gain electrons as they react to gain stability. Therefore, metals usually donate electrons to nonmetals to form cations. The number of electrons depends on their position on the periodic table. When an atom gains an electron, its overall charge becomes negative.
When an atom loses an electron its overall charge becomes positive. When an atom gains or loses electrons, its mass does not change. The number of electrons an atom can lose and gain share during a chemical reaction is called its valence. An atom that loses an electron gains a positive charge because it has fewer negatively charged electrons to balance the positive charge of the protons in the nucleus.
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C2H4O2 + 2 O2 --> 2 CO2 + 2 H2O
20.0 grams of C2H4O2 is reacted with 15.0 grams of oxygen. How many grams of carbon dioxide would be produced?
15g of CO2 will be produced from 15g of O2 as 2 moles of O2 produces 2 moles of CO2
What is moles ?
In chemistry, a mole, sometimes spelled mol, is a common scientific measurement unit for significant amounts of very small objects like atoms, molecules, or other predetermined particles.
The mole designates 6.02214076 1023 units, which is a very large number. For the International System of Units (SI), the mole is defined as this number as of May 20, 2019, according the General Conference on Weights and Measures. The number of atoms discovered through experimentation to be present in 12 grams of carbon-12 was originally used to define the mole.
C2H4O2 + 2 O2 --> 2 CO2 + 2 H2O
2 unit of O2 produces 2 unit of CO2
15g of O2 produces 15g of CO2
15g of CO2 will be produced from 15g of O2 as 2 moles of O2 produces 2 moles of CO2
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What mass of each reactant would be needed to produce 100.0 kg of methanol in CO + H2 = CH3OH
87420 g CO and 12580 g H2 mass would be needed to produce 100.0 kg of methanol in CO + H2 = CH3OH.
The atomic mass of an element refers to the mass of the constituents that make up its atom. A multiple of 1.992646547 1023 gram, or more specifically, 1.992646547 gram, is used to denote one-twelfth of the mass of the carbon-12 atom, which has an ascribed atomic mass of 12 units. On this scale, one atomic mass unit is equal to 1.660539040 1024 grammes (amu). In honour of English physicist John Dalton, the atomic mass unit is occasionally called the dalton (Da).
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2 H + 3 H -----> 2 He + 1 n
1 1 4 0
Explain in 1-2 sentences: Is the above equation an example of fission or fusion? How do you know? Give at least 2 reasons why.
The given reaction is an example of nuclear fusion.
This is because two lighter hydrogen atoms fuse to give a heavier helium atom. There is also an increase in the atomic number of the product.
What are nuclear fission and nuclear fusion reactions?Nuclear fission reactions are reactions in which the nucleus of large atoms are split into nucleus of two or more smaller atoms.
For example, uranium atoms split into krypton and barium.
Nuclear fusion reactions involve the nucleus of two or more smaller atoms combining to give an atom of a larger nucleus.
For example, hydrogen atoms fuse to give a helium atom.
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A 32.00 mL sample of an unknown H3PO4 solution is titrated with a 0.140 M NaOH solution. The equivalence point is reached when 25.24 mL of NaOH solution is added.
The neutralization reaction is
H3PO4(aq)+3NaOH(aq)→3H2O(l)+Na3PO4(aq)
What is the concentration of the unknown H3PO4 solution?
Express the molarity to three significant figures.
The concentration of the unknown [tex]H_3PO_4[/tex] solution would be 0.0368 M
Stoichiometric problemThe equation of the reaction is as follows:
[tex]H3PO_4(aq)+3NaOH(aq)--- > 3H_2O(l)+Na_3PO_4(aq)[/tex]
The mole ratio of the [tex]H_3PO_4[/tex] solution to the NaOH solution is 1:3.
But 0.140 M, 25.24 mL of NaOH was used.
Recall that: mole = molarity x volume (in Liters)
Mole of 0.140 M, 25.24 mL of NaOH = 0.140 x 25.24/1000
= 0.0035336 mol
Following the mole ratio, the equivalent mole of [tex]H_3PO_4[/tex] would be:
0.0035336 /3 = 0.00117786666
Recall that: molarity = mol/volume (in Liters)
Molarity of 0.00117786666 mol, 32.00 mL [tex]H_3PO_4[/tex] = 0.00117786666/0.032
= 0.0368 M
In other words, the molarity of the [tex]H_3PO_4[/tex] solution to 3 significant figures is 0.0368 M.
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How many particles of sodium hydroxide Will neutralize 1.6 moles pt sulfuric acid?
H2SO4 + 2 NaOH = Na2SO4 + 2 H2O
3.2 moles of NaOH will neutralize 1.6 moles of H₂SO₄
What is the mole ratio?A molar ratio is a ratio between the amounts (moles) of any two compounds that participate in a chemical reaction. It is the conversion factor between compounds in a chemical reaction and is derived from the compound's coefficients of the balanced equation. Therefore, molar ratios are used to convert the amounts of compounds in a chemical reaction.
For the given reaction:
H₂SO₄ + 2NaOH = Na₂SO₄ + 2H₂O
The above reaction is a balanced reaction and indicates that two molecules of NaOH are involved with one molecule of H₂SO₄ for neutralization. So, this gives the mole fraction of 1: 2.
Now, considering the mole ratio of H₂SO₄ to NaOH, which is 1: 2. For every mole of the sulphuric acid the reaction requires twice the moles of the sodium hydroxide.
Since the given moles of H₂SO₄ = 1.6 moles
Moles of NaOH = 2 × 1.6
= 3.2 moles
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Indicate how the concentration of each species in the chemical equation will change to reestablish equilibrium after changing the concentration of the reactant or product. An up arrow indicates an increase in concentration, a down arrow indicates a decrease in concentration, and leaving it blank means there is no change in the concentration. after the concentration of Br₂ is decreased after the concentration of HBr is increased H₂(g) + Br₂(g) O 0 □ ↓ Answer Bank ↑ 2HBr(g) 0 □
The concentration of species in the reaction changes the reaction in the following ways: decrease carbon dioxide = forward direction of reaction.
The direction of the reaction can be assessed by the following. On increasing the concentration of the reactant the reaction processes in the forward direction. On increasing the concentration of product the reaction processes in the backward direction.
The given equilibrium is:
2CO(g) + O2(g) ↔ 2CO2(g)
increase CO = forward direction of reaction
increase oxygen = forward direction of reaction
decrease CO = no change in equilibrium as reaction not processes.
decrease oxygen = no change in equilibrium as reaction not processes.
increase carbon dioxide= reverse direction
decrease carbon dioxide = forward direction of reaction.
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Determine the molecular formula for a molecule with 3.61 x 10^24 atoms of Carbon per mole of the compound, if it has the following compositions: 39.6% Carbon, 7.75% Hydrogen, and the remaining from Oxygen.
I have already figured out the empirical formula: C3H7O3
The empirical formula of compound is C₃H₇O₃. The molecular formula is 1, 2, 3, tri hydroxyl propane.
What is molecular formula ?
The molecular formula is an equation that specifies how many atoms of each element there are in a single compound's molecule. It displays the precise amount of atoms present in a molecule.
Propane, for instance, has the chemical formula C4H10. The given compound has a formula of 4 carbon atoms and 10 hydrogen atoms.
The empirical formula of compound is C₃H₇O₃.
Then, ( 12 × 3 ) + ( 1 × 7 ) + ( 16 × 3 )
= 36 + 7 + 48
= 91
( 39.6 ) + ( 7.75 ) = 47.35
91 - 47.35
= 43.65
Thus, molecular formula of given compound is 1, 2, 3, tri hydroxyl propane.
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The bond enthalpy of F2(g) is 156.9 kJ/mol. Calculate ΔH o f for F(g).
The bond enthalpy of F2(g) is 156.9 kJ/mole. The ΔH o f for F(g) is 78.5 kJ/ mole.
What is bond enthalpy?Bond enthalpy is defined as the amount of energy needed to dissolve one mole of a certain type of bond between two gaseous atoms. In general, the amount of energy acquired or lost during a reaction is comparable to the process's change in enthalpy.
Given the bond enthalpy of F2 = 156.9 kJ/ mole
The ΔH can be calculated as
ΔH = bond enthalpy of F2 / 2
ΔH = 156.9 kJ/mole / 2
ΔH = 78.5 kJ/mole
Thus, the bond enthalpy of F2(g) is 156.9 kJ/mole. The ΔH o f for F(g) is 78.5 kJ/ mole.
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Write the balanced NET ionic equation for the
reaction when AICIs and NaOH are mixed in
aqueous solution. If no reaction occurs, simply write
only NR. Be sure to include the proper phases for all
species within the reaction.
The balanced NET ionic equation is
Al(OH)3 ----> Al3+(aq) + 3OH(aq) (s)
When AICI and NaOH are combined in an aqueous solution, the following balanced NET ionic equation describes the reaction:
Al(OH)3 -----> Al3+(aq) + 3OH(aq) (s)
An exchange reaction occurs when AICI and NaOH are combined.
Al(OH)3(s) + 3NaCl(aq) -----> AlCl3(aq) + 3NaOH(aq) (1)
In this reaction, the ions Al+3 and Na+ exchange Cl- and OH- ions.
The total ionic equation must first be written in order to create the NET ionic equation:
AI(OH)3(s) + 3Na+(aq) + 3Cl(aq) + Al3+(aq) + 3Cl(aq) + 3Na+(aq) + 3OH (aq) (2)
Since the Al(OH), precipitates, we are unable to describe it as an ion because the aqueous solution does not allow for its dissociation.
The following is the net ionic equation for reaction
Al3+(aq) plus 3OH-(aq) leads to Al(OH)3(s)
The net ionic equation excludes all repeating ions from reactants and products. We eliminated the Na+ and Cl- ions from the net ionic equation because of this
The balanced net ionic equation is as follows:
Al(OH)3 ----> Al3+(aq) + 3OH(aq) (s)
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