Answer:
H₂C₂O₄ + Ca²⁺ ⟶ CaC₂O₄ + 2H⁺
Explanation:
There are three steps you must follow to get the answer.
You must write the:
Molecular equation Ionic equation Net ionic equation
1. Molecular equation
H₂C₂O₄(aq) + CaCl₂(aq) ⟶ CaC₂O₄(s) + 2HCl(aq)
2. Ionic equation
You write the molecular formulas for the weak electrolytes and solids, and you write the soluble ionic substances as ions.
H₂C₂O₄(aq) + Ca²⁺(aq) + 2Cl⁻(aq) ⟶ CaC₂O₄(s) + 2H⁺(aq) + 2Cl⁻(aq)
3. Net ionic equation
To get the net ionic equation, you cancel the ions that appear on each side of the ionic equation.
H₂C₂O₄(aq) + Ca²⁺(aq) + 2Cl⁻(aq) ⟶ CaC₂O₄(s) + 2H⁺(aq) + 2Cl⁻(aq)
The net ionic equation is
H₂C₂O₄ + Ca²⁺ ⟶ CaC₂O₄ + 2H⁺
The net ionic equation is; Ca^2+ (aq) + C2O4^2-(aq) -------> CaC2O4(s)
First we must put down the molecular equation as follows;
Na2C2O4(aq) + CaCl2(aq) ------> 2NaCl(aq) + CaC2O4(s)
The total ionic equation is;
2Na^+(aq) + Cl^- (aq) + Ca^2+ (aq) + C2O4^2-(aq) -------> 2Na^+(aq) + Cl^- (aq) + CaC2O4(s)
The net ionic equation is;
Ca^2+ (aq) + C2O4^2-(aq) -------> CaC2O4(s)
The spectator ions in this reaction are Na^+ and Cl^-, they appear on both sides of the reaction equation and they do not appear in the final net ionic equation.
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Which statement would support a merit of the Bronsted-Lowry base theory has over the Arrhenius base theory?
A) Hydronium ions are Bronsted-Lowry bases released in solution.
B) Bronsted-Lowry bases include both proton and hydroxide acceptors.
C) The Bronsted-Lowry bases can act as electron and proton acceptors.
D) Hydroxide ions are the only Bronsted-Lowry bases produced in solution.
Answer:
Explanation:
Bronsted Base is an H+ acceptor
No good answer Bronstead base does not accept hydroxide or electrons
Answer:
Bronsted-Lowry bases include both proton acceptors and hydroxide ions.
Explanation:
Bronsted Lowry base theory includes all bases that can act as proton acceptors. This includes Arrhenius bases include bases that can produce hydroxide ions in solution, such as sodium hydroxide, and more traditional proton acceptors like ammonia, NH3..
Combination (Synthesis) Reactions
pls help!
1. CaO + H₂O [tex]\rightarrow[/tex] Ca(OH)₂
2. P₄ + 5O₂ [tex]\rightarrow[/tex] P₂O₅
3. 2Ca + O₂ [tex]\rightarrow[/tex] 2CaO
4. 8Cu + 2S₈ [tex]\rightarrow[/tex] [tex]8CuS_2[/tex]
5. CaO + H₂O [tex]\rightarrow[/tex] Ca(OH)₂
6. S₈ + 8O₂ [tex]\rightarrow[/tex] 8SO₂
7. 3H₂ + N₂ [tex]\rightarrow[/tex] 2NH₃
8. H₂ + Cl₂ [tex]\rightarrow[/tex] 2HCl
9. 16Ag + S₈ [tex]\rightarrow[/tex] 8Ag₂S
10. 4Cr + 3O₂ [tex]\rightarrow[/tex] 2Cr₂O₃
11. 2Al + 3Br₂ [tex]\rightarrow[/tex] 2AlBr₃
12. 2Na + I₂ [tex]\rightarrow[/tex] 2NaI
13. 2H₂ + O₂ [tex]\rightarrow[/tex] 2H₂O
14. 4Al + 3O₂ [tex]\rightarrow[/tex] 2Al₂O₃
1. CaO + H₂O -> Ca(OH)₂: The balanced equation is CaO + H₂O [tex]\rightarrow[/tex] Ca(OH)₂. This chemical equation is already balanced, as there is an equal number of calcium (Ca), oxygen (O), and hydrogen (H) atoms on both sides.
2. P₄ + O₂ -> P₂O₅: The balanced equation is P₄ + 5O₂ [tex]\rightarrow[/tex] P₂O₅. Balancing involves placing a coefficient of 5 in front of O₂ to ensure an equal number of phosphorus (P) and oxygen (O) atoms on both sides.
3. Ca + O₂ -> CaO: The balanced equation is 2Ca + O₂ [tex]\rightarrow[/tex] 2CaO. By placing a coefficient of 2 in front of Ca and CaO, the number of calcium (Ca) and oxygen (O) atoms is balanced.
4. Cu + S₈ -> CuS: The balanced equation is 8Cu + 2S₈ [tex]\rightarrow[/tex] [tex]8CuS_2[/tex]. By placing a coefficient of 8 in front of Cu and a coefficient of 2 in front of S, the number of calcium (Cu) and oxygen (S) atoms is balanced.
5. CaO + H₂O -> Ca(OH)₂: The balanced equation is CaO + H₂O [tex]\rightarrow[/tex] Ca(OH)₂, as the number of calcium (Ca), oxygen (O), and hydrogen (H) atoms is already equal on both sides.
6. S₈ + O₂ -> SO₂: The balanced equation is S₈ + 8O₂ [tex]\rightarrow[/tex] 8SO₂. Balancing involves placing a coefficient of 8 in front of O₂ to ensure an equal number of sulfur (S) and oxygen (O) atoms on both sides.
7. H₂ + N₂ -> NH₃: The balanced equation is 3H₂ + N₂ [tex]\rightarrow[/tex] 2NH₃. By placing coefficients of 3, 1, and 2 in front of H₂, N₂, and NH₃ respectively, the equation is balanced.
8. H₂ + Cl₂ -> 2HCl: The balanced equation is H₂ + Cl₂ [tex]\rightarrow[/tex] 2HCl. Balancing involves placing a coefficient of 2 in front of (HCl) to ensure an equal number of hydrogen (H) and chlorine (Cl) atoms on both sides.
9. Ag + S₈ -> Ag₂S: The balanced equation is 16Ag + S₈ [tex]\rightarrow[/tex] 8Ag₂S. By placing a coefficient of 16 in front of Ag and a coeffiecient of 8 in front of the product of Ag and S, so the number of calcium (Ag) and oxygen (S) atoms is balanced.
10. Cr + O₂ -> Cr₂O₃: The balanced equation is 4Cr + 3O₂ [tex]\rightarrow[/tex] 2Cr₂O₃. Balancing involves placing coefficients of 4 and 3 in front of (Cr) and (O₂) respectively to equalize the number of chromium (Cr) and oxygen (O) atoms.
11. Al + Br₂ -> AlBr₃: The balanced equation is 2Al + 3Br₂ [tex]\rightarrow[/tex] 2AlBr₃. Balancing involves placing coefficients of 2 and 3 in front of Al and Br₂ respectively to ensure an equal number of aluminum (Al) and bromine (Br) atoms.
12. Na + I₂ -> NaI: The balanced equation is 2Na + I₂ [tex]\rightarrow[/tex] 2NaI, as coefficients of 2 are placed in front of Na and NaI to achieve a balanced reaction.
13. H₂ + O₂ -> 2H₂O: The balanced equation is 2H₂ + O₂ [tex]\rightarrow[/tex] 2H₂O. Balancing involves placing coefficients of 2 in front of H₂ and H₂O to ensure an equal number of hydrogen (H) and oxygen (O) atoms on both sides.
14. Al + O₂ -> Al₂O₃: The balanced equation is 4Al + 3O₂ [tex]\rightarrow[/tex] 2Al₂O₃. Balancing involves placing coefficients of 4 and 3 in front of Al and O₂ respectively to equalize the number of aluminum (Al) and oxygen (O) atoms.
Mackenzie creates a transverse wave using a rope tied to a tree, as shown in the diagram.
Her teacher asks her to change the wave to show a greater energy transfer. What does she do?
A. She increases the wavelength of the wave.
B. She decreases the amplitude of the wave.
C. She increases the amplitude of the wave.
D. She decreases the frequency of the wave.
C. She increases the amplitude of the wave
Explanation:
For a wave:
- The amplitude is the maximum displacement of the wave relative to its equilibrium position
- The wavelength is the distance between two points of the same with same shape (e.g. between two crests or two troughs)
For a mechanical wave (a wave that is produced by the vibrations of the particles in a medium), the energy of the wave is proportional to the square of its amplitude:
[tex]E\propto A^2[/tex]
where
A is the amplitude
E is the energy
Therefore, by increasing the amplitude of the wave, we also increase its energy. So, the correct option is
C. She increases the amplitude of the wave
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A sample of nitrogen occupies 10.0 liters at 25°C and 98.7 atm. what would be the volume at 20°C and 102.7 atm using the combined gas law?
A. 9.45 L
B. 10.2 L
C. 4.52 L
D. 3.14 L
Answer:
A. is most likely the answer
Answer: option A. 9.45L
Explanation:
P1 = 98.7atm
P2 = 102.7atm
T1 = 25°C = 25 + 273 =298K
T2 = 20°C = 20 +273 = 293K
V1 = 10L
V2 =
P1V1 /T1 = P2V2 /T2
98.7x10/298 = 102.7xV2/293
298x102.7xV2 = 98.7x10x293
V2 = (98.7x10x293) /(298x102.7)
V2 = 9.45L
Which reaction model represents a nuclear fission reaction?
A → B + C
A → B + C + n
A + C → B + n
n + A → B + C + n
Yo sup??
The correct answer is option D ie
n + A----> B + C + n
Its similar to bombarding a U 235 ore.
Hope this helps.
Answer:
Answer is D, I've done the exam I know for sure.
Explanation:
n + A → B + C + n
Hope you all get a good grade :))
Chemical reaction to form products this chemical equation represents one such reaction the coefficient for one of the reactants or products is incorrect which part of the chemical equation is incorrect. 2c⁴h¹⁰ + 10o² -> 8co² +10h²o
Answer:
In a chemical equation, chemicals that react are the reactants, while chemicals that are produced are the products/by products. Both sides of the equation must be balanced.
\
Explanation
When writing a chemical equation, reactants reacts to produce products. For example in the equation for formation of water, hydrogen combines with oxygen as 2H₂ +O₂→2H₂O where the first part before the arrow represent the reactants and the next part after the arrow are the products. Reactants are on the left where as products are on the right.Coefficient 2, in this cases is used for balancing the equation
The coefficient of the reactant diatomic oxygen (O2) is incorrect in the provided chemical equation. The corrected equation for the combustion of butane is 2C4H10 + 13O2 -> 8CO2 +10H2O.
Explanation:The given equation is 2C4H10 + 10O2 -> 8CO2 +10H2O. The coefficient of diatomic oxygen (O2), a reactant, is incorrect. It's essential to balance the number of atoms on both sides of a chemical equation to abide by the law of conservation of matter. The correct equation should be 2C4H10 + 13O2 -> 8CO2 +10H2O. This represents the combustion of butane.
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What is the formula for the ionic compound formed from each cation and anion cesium and nitrite?
Answer:
CsNO₃
Explanation:
Ionic compounds are formed by an anion (negative charge) and cation (positive charge). When you write the formula, you should write the cation before the anion.
1. Find the ion formulas for the two atoms.
On your periodic table, it will say cesium is Cs⁺. It has the positive charge 1 (cesium is the cation).
On your data sheet/polyatomic ions chart, it will say nitrate is NO₃⁻. It has the negative charge 1 (nitrate is the anion).
2. Write the cation before the anion.
Cs⁺ NO₃⁻
Since nitrate is polyatomic (more than one element), write brackets so you don't get confused.
Cs⁺ (NO₃⁻)
3. "Cross-over"
Each atom will take the charge number of its partner as the number of atoms (subscript). If the charge only says ⁺ or ⁻, then the charge is 1.
Cs⁺₁ (NO₃⁻)₁
4. Clean up
We do not need any of the charges in the formula.
Cs₁ (NO₃)₁
We also don't need the number of atoms if it is "1".
Cs (NO₃)
We do no need to write any brackets if there is only one atom of a polyatomic ion.
CsNO₃
This is the formula.
The formula for the ionic compound formed by cesium and nitrite is CsNO2.
Explanation:The formula for the ionic compound formed by cesium and nitrite can be determined by balancing the charges of the cation and anion. Cesium (Cs) is a Group 1A element and forms a +1 cation. Nitrite (NO2-) is a polyatomic ion with a -1 charge. To balance the charges, you need one cesium cation for every nitrite anion, so the formula is CsNO2.
Ionic compound shares the electrons between its constituent atoms so as to form a compound which is stable in terms of its valence configuration.
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express y in terms of x
Answer:
To express y in terms of x is to find an expression that relates the value of x with y. This is to write a model, function, expression or formula that permits to input a value for x and the outcome will be the value of y. .For example if you have y = 2x, y is in terms of x and you can input different values of x to obtain corresponding values (outputs) of y.
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Explanation:
Final answer:
To express y in terms of x, you manipulate an equation to make y the subject, using substitution and algebraic manipulation for simple equations, or differentiation and implicit differentiation for more complex relationships.
Explanation:
To express y in terms of x, one typically manipulates a given equation or set of equations, solving for y to make it the subject. The process may involve various mathematical techniques, including substitution, algebraic manipulation, and differentiation when dealing with functions of multiple variables. An example of expressing y in terms of x can be seen in a simple linear equation, such as y = mx + b, where m is the slope and b is the y-intercept. In this case, y is already expressed in terms of x.
In more complex relationships, such as the nonlinear equation x + y = exp(xy), one might take a derivative with respect to x to get dy/dx and solve that differential equation for y in terms of x, considering implicit differentiation if necessary.
How many molecules of sodium oxide will be created if 275 grams of sodium reacts with excess oxygen?
Given the equation: 4Na + O2 -> 2Na2O
Answer: 12.04x10^23 molecules of Na2O
Explanation:
The table below shows some of the stars in our galaxy and their numbers of light years from the Sun.
Star
Light Years from the Sun
Chara
27.3 light years
Tau Ceti
11.9 light years
Zeta Leporis
70.2 light years
Epsilon Reticuli
59.5 light years
Which star is the closest distance to the Sun?
A.
Tau Ceti
B.
Epsilon Reticuli
C.
Zeta Leporis
D.
Chara
Answer:
Tau Ceti, 11.9 light years from the SunExplanation:
The table is:
Star Light Years from the Sun
Chara 27.3 light years
Tau Ceti 11.9 light years
Zeta Leporis 70.2 light years
Epsilon Reticuli 59.5 light years
Light years is a unit of distance. It is the distance that the light travels in one year.
Since the speed of light is a constant, [tex]c[/tex] ≈ 300,000,000 m/s, one light year is equal to the product of [tex]c[/tex] by the number of seconds in a year (about 31,540,000 seconds).
Thus, the smaller the number of light years a star is from the Sun the closer the distance between the star and the Sun.
Rank the distances in increasing order:
11.9 light years < 27.3 light years < 59.5 light years < 70.2 light yearsThen, Tau Ceti, with 11.9 light years is the closest to the Sun.
An element belongs to group 17 of the periodic table. This element is most likely a ____. A solid of this element would have a ____ appearance.
An element belongs to group 17 of the periodic table. This element is most likely a nonmetal. A solid of this element would have a dull appearance.
Group 17 of the periodic table consists of the halogens, which are nonmetals. These elements are characterized by their high electronegativity and reactivity. They typically form diatomic molecules (e.g., [tex]F_2, Cl_2[/tex]) and have seven valence electrons, which makes them very receptive to gaining an electron to achieve a stable electron configuration.
The physical properties of halogens vary, but solid halogens are generally brittle and have a dull appearance due to their nonmetallic nature. Unlike metals, which have a shiny luster, nonmetals do not reflect light well and thus appear dull. This is because the outer electrons in nonmetals are more tightly held by the nucleus, resulting in poor electrical conductivity and a lack of the metallic luster that is characteristic of metals, where the delocalized electrons can move freely and reflect light.
(A) An element belonging to group 17 of the periodic table is most likely a halogen. A solid of this element would have a shiny appearance.
- Group 17 of the periodic table consists of the halogens: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).
- Halogens are typically nonmetals and exist as diatomic molecules in their elemental form (F₂, Cl₂, Br₂, I₂, At₂).
- In their solid state, halogens generally have a shiny appearance due to their molecular structure and interactions.
Complete question:
An element belongs to group 17 of the periodic table. This element is most likely a ____. A solid of this element would have a ____ appearance.
A. Halogen; shiny
B. Metal; dull
C. Alkali metal; metallic
D. Noble gas; transparent
Calculate the number of formula units in 41.40 grams of Ca(CIO3)2
Answer: 1.21x10²³ formula units Ca( ClO3)2
Explanation: solution attached:
Convert mass of Ca(ClO3)2 to moles
Convert moles of Ca(ClO3)2 to formula units using Avogadro's number
all of the terms listed below are sediment transporting agents EXCEPT:
A.) - Stratification
B.) - glacial ice
C.) - Stream water
D.) - Windstorm
Answer:
A: Stratification
Explanation:
Water, wind, ice and gravity are the main agents for sediment transport. Gravity can act alone or associated to other agents, such as water, thus constituting the main sediment transport agent in nature. In fact, rivers account for approximately 95% of the sediment flow to the oceans.
pls give me brainliest. :)
All of the terms listed below are sediment transporting agents EXCEPT Stratification and the correct option is option A.
What are Sediment Transporting agents?
The main agents by which sedimentary materials are moved include gravity (gravity transport), river and stream flow, ice, wind, and estuarine and ocean currents.
Running water and wind are the most widespread transporting agents.
A simple principle controls transport;
movement of sediment occurs only as long as the force exerted on the sediment grain by the agent exceeds the force that holds the grain in place (friction due to gravity).Therefore, All of the terms listed below are sediment transporting agents EXCEPT Stratification and the correct option is option A.
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A scientific model is easier to interpret and understand when it includes the main parts or processes, rather than every detail of
every part or process.
Please select the best answer from the choices provided
OT
OF
Answer:
ot
Explanation:
Answer:
true
Explanation:
I’m trying to find the number of representative particles in 0.4 mol KCL what is my first step?
Answer:
2.41 x 10²³ particles
Explanation:
Data Given:
no. of moles of KCl = 0.4 mol
no. of particles = ?
Solution:
To find number of particles we use following formula
number of moles = number of particles / Avogadro's number
as we have to find number of particles so rearrange the above equation
no. of particles = no. of moles x Avogadro's number . . . . . . . (1)
Where
Avogadro's number = 6.022 x 10²³ particles per mol
6.022 x 10²³ are number of particles in one mole of a substance. and this quantity is known as Avogadro's number
So,
put values in above equation 1
no. of particles = 0.4 mol x 6.022 x 10²³ (particles/mol)
no. of particles = 2.41 x 10²³ particles
So, 0.4 mol KCl contains 2.41 x 10²³ representative particles
What is the cause of change over time in a population?
O The environment modifies.
O All members can mate easily with all other members.
O No new members come in or go out.
Answer:
the environment modifies i believe, or no new members come in or go out
Explanation:
as an environment modifies, the population would have to adapt to this modification, which causes change over time in a population. and if no new members come in or go out, the population may increase or decrease over time.
Which form of energy is associated with the random motion of the particles in water
1. chemical energy
2. electrical energy
3. nuclear energy
4. thermal energy
The energy associated with the random motion of particles in water is thermal energy, which is determined by the speed of atomic and molecular motion and can be transferred but not converted.
Explanation:The form of energy associated with the random motion of particles in water is thermal energy. This energy type results from atomic and molecular motion; the faster the motion, the greater the thermal energy. Atoms and molecules inside all objects, including water, are in random motion. The internal kinetic energy from these random motions is what’s called thermal energy, and it is related to the temperature of the object. It’s important to note that thermal energy can be transferred from one place to another - not transformed or converted - through the processes of conduction, convection, and radiation. In this case, the energy is known as heat energy.
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Final answer:
The form of energy associated with the random motion of particles in water is thermal energy (option 4), which is indicative of the substance's temperature and increases with particle motion.
Explanation:
The form of energy associated with the random motion of particles in water is option 4. thermal energy. This is because atoms and molecules in any substance, including water, are always in some state of random motion. The internal kinetic energy resulting from these motions is termed thermal energy, and it reflects the temperature of the substance. The faster the motion of the particles, the higher the thermal energy. For example, when water is heated, the increase in kinetic energy of water molecules leads to an increase in temperature and thus an increase in thermal energy.
What is the pressure generated in a 10 liter container at 300K when
68 gram of H2O2 decomposes?
please I only have 30 minutes left
Answer:
Pressure = 2.45 atm
Explanation:
The balance chemical equation for the decomposition of hydrogen peroxide is as follow;
2 H₂O₂ ₍aq₎ → 2 H₂O ₍l₎ + O₂ ₍g₎
Step 1: Calculate Moles of H₂O₂ as;
Moles = Mass / M.Mass
Moles = 68.0 g / 34.01 g/mol
Moles = 1.99 moles
Step 2: Calculate Moles of O₂ gas produced:
According to equation,
2 moles of H₂O₂ produced = 1 mole of O₂
So,
1.99 moles of H₂O₂ will produce = X moles of O₂
Solving for X,
X = 1.99 mol × 1 mol / 2 mol
X = 0.995 moles of O₂
Step 3: Calculate pressure exerted by O₂ gas as;
According to ideal gas equaton,
P V = n R T
Or,
P = n R T / V
Putting values,
P = 0.995 mol × 0.08205 L.atm.K⁻¹.mol⁻¹ × 300 K / 10 L
P = 2.45 atm
What is the mass of a nitrogen dioxide molecule?
The mass of a nitrogen dioxide (NO2) molecule is approximately 46 atomic mass units (amu) as per the concept of molar mass.
Molar mass of a compound or a molecule is defined as the mass of the elements which are present in it.The molar mass is considered to be a bulk quantity not a molecular quantity. It is often an average of the of the masses at many instances.
The molecular mass and formula mass are used as synonym for the molar mass.It does not depend on the amount of substance which is present in the sample.It has units of gram/mole.
Molar masses of an element are given as relative atomic masses while that of compounds is the sum of relative atomic masses which are present in the compound.This is because the atomic masses of nitrogen is 14 amu and that of nitrogen is 16 amu, respectively. Since there are two oxygen atoms and one nitrogen atom in an NO₂ molecule, the total mass is calculated as follows:
[tex]2\times16+1\times14=46 \ amu[/tex]
Therefore, the mass of a nitrogen dioxide molecule is approximately 46 amu.
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Which element do scientists use to standardize molar masses?
A) Carbon
B) Hydrogen
C) Iron
D) Oxygen
Answer:
the answer is A) carbon
Have a nice day and I hope it helped!
why does hydrogen only burn at the mouth of the bottle?
Please solve this thanks
Answer:
A because ohc 3 stands for 1 that means one oxygen joint the h 6+6=12 so 1 oxygen and 12 hydrogen
Write the symbol for every chemical element that has atomic number less than 14 and atomic mass greater than 23.3 u.
Answer: Magnesium and Aluminum Mg & Al
Explanation:Magnesium's atomic mass is 24.31 and Aluminum's atomic mass is 26.98.
The symbol for every chemical element in this category is Mg & Al which is for Magnesium and Aluminum. Magnesium's atomic mass is 24.31 and Aluminum's atomic mass is 26.98.
What is an element symbol?
In chemistry, the symbol of an element symbol is usually used to refer to the element's name in a simple and easy-to-remember manner. It is a one or two-letter abbreviation used for the name of a chemical element. Though this term is also applied to alchemical symbols.
When an element’s symbol is represented by of two letters, the first letter is always capitalized and the second letter is written in lowercase.
The symbols of elements can also refer to the alchemy symbols used for the elements. Sometimes they even refer to the symbols used for the description of their isotopes.
Therefore, in this case, the symbol for every chemical element in this category is Mg and Al which is for Magnesium and Aluminum. Magnesium's atomic mass is 24.31 and Aluminum's atomic mass is 26.98.
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Explain why elements in the same group of the periodic table have similar chemical properties
Answer:
Elements in same group have same chemical properties due to same number of valence electrons in valence shell.
Explanation:
Chemical properties are those properties which results in transforming the starting material to a entirely new substance with different chemical and physical properties. This transformation takes place after a chemical reaction. Hence, the chemical reactivity of some atoms is greater than the others and vice versa.
In periodic table it is found that the elements in the same group have almost same chemical behaviour. For example, elements of group 8 (or 18) are almost non reactive, while that of group 1 and group 7 are found very reactive and show same chemical behaviour like group 1 elements forms +1 ion while group 7 elements form -1 ions as the group 1 metals have single valence shell electron which upon losing allow the atom to attain stability and the halogen having 7 electrons in valence shell upon accepting one electron allow them to attain a octet of stability respectively.
Elements in the same group of the periodic table have similar chemical properties because they have the same number of valence electrons in their outer shell, which governs their chemical behavior.
Explanation:Elements in the same group of the periodic table have similar chemical properties because they have the same number of valence electrons in their outermost shell. Valence electrons are primarily responsible for the chemical behavior of an element. They are involved in bonding with other atoms and determine the reactivity of the element. For example, Group 1 elements (alkali metals) each have one valence electron and behave very similarly, exhibiting high reactivity. On the contrary, Group 8 elements (noble gases) each have a full complement of eight valence electrons in their outermost shell making them extremely stable and unreactive.
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What volume would be occupied by 12.4 moles of helium gas at STP
Answer: 277.8 L
Explanation: Use Ideal gas law equation:
PV= nRT
At STP: P= 1atm T = 273 K
V= nRT/ P
= 12.4 moles He ( 0.08205 L.atm/mole.K) ( 273 K) / 1 atm
= 277.8 L
Perching birds, such as cardinals, warblers, and robins, live in trees. Suppose a developer cuts down all of the trees in an area to build a housing subdivision. What would most likely happen to the perching birds living in that ecosystem?
A. The perching birds would begin building their nests on the ground.
B. The perching birds would be forced to migrate to another area.
C. The perching birds would all starve and subsequently die out.
D. The perching birds would stop reproducing until new trees grew in the area.
Answer:
B. The perching birds would be forced to migrate to another area...
Explanation:
The most likely result of a developer cutting down the trees would be, the food that the birds eat would no longer be there. Therefore, the birds would have to go somewhere else...
Answer:
B. The perching birds would be forced to migrate to another area.
Explanation:
That was the answer on study island :/
What does the subscript mean in the chemical formula CO2?
In chemical formulas, subscript numbers represent the number of atoms or molecules immediately preceding the subscript number.
Subscript Numbers:
In a chemical formula, subscript represent the ratio at which the atom bond with another atom to form compound.
For example - In Carbon dioxide molecule, the subscript number after oxygen represent that 2 Oxygen bond with one Carbon.
Therefore, subscript numbers means in chemical formulas represent the number of atoms or molecules immediately preceding the subscript number.
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what does Newton’s second law of motion state ?
Answer:
The Newtons second law of motion states that"The rate of change of the momentum of a moving body is directly proportional to the force applied."Derivation from,
F = △P/tto,
F=ma#SPJ4
29.Cu2S(g) + O2(g) → 2Cu + SO2(g)
What is the change in the oxidation number of copper in the reaction?
Answer:
In the reactant; Cu2S
2 Cu - 2(1) = 0
2 Cu = 2
Cu = 22
Cu = +1
In the product, Cu
Cu = O
The oxidation number of Cu in Cu2S and Cu respectively is +1 and 0 respectively
Explanation:
Elements are represented by _____ or _____ letter symbols.
Provide an example of an element and it’s symbol:
Answer:
In the typical periodic table, each element is listed by its element symbol and atomic number. For example, “H” denotes hydrogen, “Li” denotes lithium, and so on. Most elements are represented by the first letter or first two letters of their English name, but there are some exceptions.
Each element has a symbol,one or two letters that represent the element much as your initials represent you. The symbol of an element represents one atom of that element.
...
Symbol Element
Cf californium
C carbon
Ce cerium
Cs cesium
Explanation:
The element is the purest form of the atom that is composed of single species. Elements are represented by one or two letter symbols, like He and H.
What is an element?The purest and the most simplified form of an atom is said to be called an element. Each and every element is said to have a respective atomic mass and atomic number that are denoted with symbols in the periodic table.
The elements are represented as one or two letter symbols in the table along with the atomic number and masses as the superscript and subscript. For example, a hydrogen atom is represented as H, helium as He, neon as Ne, carbon as C, calcium as Ca, oxygen as O, sodium as Na, nitrogen as N, etc.
Therefore, the element in a periodic table is represented by one or two alphabetical symbols.
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