Answer:
1) potential energy of the bond.
2) Linear
3) The electrons are transferred from K to Cl.
4) ClF
5) Oxygen
6) Electrolysis
7) Double displacement
Explanation:
As two atoms approach each other in a bonding situation, the potential energy of the bond is minimized as the internuclear distance of the bonding atoms decreases.
BeH2 has two electron domains and the central beryllium atom is sp2 hybridized. According to valence shell electron pair repulsion theory. A molecule having two regions of electron density will lead to a linear molecule.
KCl is an ionic compound hence there is a transfer of electrons from K(metal) to Cl(nonmetal).
ClF has partial charges because it contains a polar covalent bond. The partial charges arise from the dipole within the molecule. LiF is a pure ionic compound formed by transfer of electrons from Li to F. The species possess full and not partial charges.
When an oxygen atom bonds with another oxygen atom, what has been formed is a homonuclear covalent bond. Since the electro negativity of the both atoms is exactly the same, a pure covalent bond is formed. Recall that polar covalent bonds are formed when there is a significant electro negativity difference between the bonding atoms.
When direct current is passed through certain salt solutions during electrolysis, gases may be evolved and collected at the appropriate electrodes.
A double-replacement reaction is a reaction in which the cations and anions present in two different ionic compounds that are reacting together exchange their positions to form two new compounds on the product side. For instance, look at the reaction shown in question 7 as a typical example of this;
AgNO3 (s) + NaCl (s) → AgCl (s) + NaNO3 (s).
Why would we want to correct for water vapor?
Answer:
The vapor pressure due to water in a sample can be corrected for in order to get the true value for the pressure of the gas.
Explanation:
Seleccione una actividad humana y el impacto generado debe realizar un resumen sobre la actividad seleccionada y dos medidas de prevención para evitar la alteración de los ciclos.
Answer:
Industrial activity increases the emission of greenhouse gases in the atmosphere, especially carbon dioxide (CO2), and it negatively affects climate by increasing global warming.
Two actions to face the global warming:
1- To substitute the use of fossil fuels by alternative clean energy sources such as, for example, hydroelectric, geothermal, solar and wind energy resources.
2- The government's policies decided to develop electric cars and to stimulate healthy habits such as walking instead of the use of conventional fossil-fueled transport modes.
What is a solvent?
A.always water
B.the liquid in the solution
C.the substance in which the solute dissolves
Answer:
C. the substance in which the solute dissolves
Explanation:
There are two terms in this... the solute and the solvent. The way I learned how to remember this is with a little pirate analogy: The loot (stolen treasure) always goes in the vent. So, the soLUTE goes in the solVENT.
There are ___________ forces of attraction between particles in the gas state. Use the following word bank to help you.
Answer:
Different
Explanation:
Consider the incomplete reaction below.
NaOH + X Right arrow. NaCH3COO + H2O
What is X in this reaction?
NH4OH
H3PO4
H2CO3
CH3COOH
A chemical reaction involves the interaction of reactants. The substance X ,must be an acid and in this case is CH3COOH
What is a reaction?In chemistry, a reaction is said to occur when substances interact in such a way that other new substances are formed.
Now let us look at the particular reaction; NaOH + X ----> NaCH3COO + H2O. The substance X must be an acid. Hence, the most likely susbstance is CH3COOH.
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The nickname __________ was given to people from southern states that supported reconstruction laws that helped African Americans.
A. "copperhead"
B. "scalawag"
C. "carpetbagger"
D. "Radical Republican"
H3PO4 + Ca(OH)2 → Ca(H2PO4)2 + H2O
Given question is incomplete. The complete question is as follows.
Balance the following equation:
[tex]H_3PO_4 + Ca(OH)_2 \rightarrow Ca(H_2PO_4)_2 + H_2O[/tex]
Answer: The balanced chemical equation is as follows.
[tex]2H_3PO_4 + Ca(OH)_2 \rightarrow Ca(H_2PO_4)_2 + 2H_2O[/tex]
Explanation:
When a chemical equation contains same number of atoms on both reactant and product side then this equation is known as balanced equation.
For example, [tex]H_3PO_4 + Ca(OH)_2 \rightarrow Ca(H_2PO_4)_2 + H_2O[/tex]
Number of atoms on reactant side:
H = 5
P = 1
O = 6
Ca = 1
Number of atoms on product side:
H = 6
P = 2
O = 9
Ca = 1
In order to balance this equation, we will multiply [tex]H_3PO_4[/tex] by 2 on reactant side and we will multiply [tex]H_2O[/tex] by 2 on product side. Hence, the balanced chemical equation is as follows.
[tex]2H_3PO_4 + Ca(OH)_2 \rightarrow Ca(H_2PO_4)_2 + 2H_2O[/tex]
What is the molarity of a solution that contains 6 moles of NaCl in 3 L of solution?
a
2.0 M
b
0.5 M
c
0.25 M
d
18.0 M
Answer:
a
2.0 M
Explanation:
divide 6by 3
formula : molarity=moles divided by volume of solutions
determine the mass of a copper (ii) trioxonitrate(v) that will be formed when 15g og copper is added to excess dilute trioxonitrate(v) acid
Explanation:
Copper(II) carbonate basic, CuCO3•Cu(OH)2(s), is the dull green colour that forms on copper roofs. Copper oxidises in the air to form an approximately equimolar mixture of CuCO3 and Cu(OH)2.The percentage of CuCO3 in the
A(n) __________ can be added to milk to neutralize it.
65g of nitric acid are produced in a reaction. 2.5g of platinum are added to the reaction vessel at the start of the reaction to act as a catalyst. How much platinum will there be left in the vessel at the end of the reaction?
Answer:
2.5 g of platinum
Explanation:
Recall that a catalyst is a specie added to a reaction system to increase the rate of reaction. A catalyst does not participate in the chemical reaction hence it remains unchanged at the end of the chemical reaction. A catalyst merely provides an alternative reaction pathway by lowering the activation energy of the reaction system. Hence a catalysed reaction usually proceeds faster with less energy requirement than the uncatalysed reaction.
Since the catalyst does not participate in the reactions and remains unchanged at the end of the reaction, the mass of platinum will remain the same (2.5g). The mass can only change if a specie participates in the chemical reaction. Hence the answer.
2.5 g of platinum will there be left in the vessel at the end of the reaction
The following information should be considered:
Since the catalyst does not participate in the reactions and remains the same at the end of the reaction, the mass of platinum will remain the same (2.5g). The mass can only change in the case when a specie participates in the chemical reaction.learn more: https://brainly.com/question/2514933?referrer=searchResults
For neap tides, what must the angular alignment be between the sun, earth and moon?
Answer:
The angular alignment is 90 degrees
Explanation:
The neap tide is a type of tide which occurs around seven days after a spring tide. This type of tide happens twice every month.
The tide is usually moderate and it exists when the sun and moon are usually at right angles to each other when it occurs. A right angle is also known as 90 degrees which validates the tide occurring at an angle 90.
What type of mixture is fog?
O A. A homogenous mixture of a solid in a gas
B. A heterogeneous mixture of a liquid in a gas
C. A homogenous mixture of a liquid in a gas
D. A heterogeneous mixture of a solid in a gas
Answer:
. A homogeneous mixture of a solid in a gas
What evidence did the team examine that matter is conserved when dry ice changes into a gas?
Answer:
Im not sure what you mean but I hope what I wrote helps you!
The Law of Conservation of Matter says that the amount of matter stays the same, even when matter changes form. Sometimes it may seem that matter disappears during a science experiment, but this law tells us that matter cannot magically appear or disappear, it simply changes from one form to another.
Explanation:
A catalyst can only be used once.
True
False
Answer:
False
Explanation:
Catalysts are reusable because they keep the chemical reactions moving without being consumed.
Calculate the percent ionic, the percent covalent, and the bond length (in picometers) of a chemical bond between phosphorus and selenium.
Phosphorus—atomic radius: 109 pm; covalent radius: 106 pm; ionic radius: 212 pm.
Selenium—atomic radius: 122 pm; covalent radius: 116 pm; ionic radius: 198 pm.
98 percent ionic, 2 percent covalent, 410 pm
4 percent ionic, 96 percent covalent, 222 pm
2 percent ionic, 98 percent covalent, 222 pm
96 percent ionic, 4 percent covalent, 410 pm
Answer:
The correct option is;
4 percent ionic, 96 percent covalent, 222 pm
Explanation:
The parameters given are;
Phosphorus:
Atomic radius = 109 pm
Covalent radius = 106 pm
Ionic radius = 212 pm
Electronegativity of phosphorus = 2.19
Selenium:
Atomic radius = 122 pm
Covalent radius = 116 pm
Ionic radius = 198 pm
Electronegativity of selenium= 2.55
The percentage ionic character of the chemical bond between phosphorus and selenium is given by the relation;
Using Pauling's alternative electronegativity difference method, we have;
[tex]\% \, Ionic \ Character = \left [18\times (\bigtriangleup E.N.)^{1.4} \right ] \%[/tex]
Where:
Δ E.N. = Change in electronegativity = 2.55 - 2.19 = 0.36
Therefore;
[tex]\% \, Ionic \ Character = \left [18\times (0.36)^{1.4} \right ] \% = 4.3 \%[/tex]
Hence the percentage ionic character = 4.3% ≈ 4%
the percentage covalent character = (100 - 4.3)% = 95.7% ≈ 96%
The bond length for the covalent bond is found adding the covalent radii of both atoms as follows;
The bond length for the covalent bond = 106 pm + 116 pm = 222 pm.
The correct option is therefore, 4 percent ionic, 96 percent covalent, 222 pm.
Which statement best compares the energy involved in melting with the energy involved in boiling for a given liquid?
Answer: Energy is removed from the particles in each change, but more energy is removed in melting than in boiling because the attractions are weaker. Energy is removed from the particles in each change, but more energy is removed in boiling than in melting because the attractions are weaker. Energy is added to the particles in each change, but boiling requires more energy than melting because the attractions must be completely overcome. Energy is added to the particles in each change, but melting requires more energy than boiling because the attractions must be completely overcome.
What would heating a sealed glass jar do?
O A. Increase the size of the gas molecules
B. Increase the number of gas molecules
C. Increase the pressure of the gas inside
D. Increase the volume of the gas inside
The right response is to raise the internal gas pressure. When a sealed glass jar is heated, the temperature of the gas within rises, causing the gas molecules to travel faster and collide with the jar's walls more often and with more force, increasing the gas's pressure.
What is gas molecule?Gas molecules are made up of atoms that are linked together. These interatomic connections function similarly to springs, connecting atoms of varying masses. This connection vibrates at a constant frequency known as the natural frequency. Atoms, molecules, and/or ions are all present in gases, liquids, and solids, but their behavior varies between the three phases. The graphic below depicts the tiny differences. A gas as seen via a microscope. A gas is a condition of stuff that does not have a set volume or form. Air, water vapor, and helium are examples of gases. A gas is a kind of stuff that does not have a defined volume or shape. To put it another way, a gas takes on the shape and volume of its container.
Here,
The correct answer is Increase the internal gas pressure as When a sealed glass jar is heated, the temperature of the gas within rises, forcing the gas molecules to travel faster and hit with the jar's walls more often and with more force, raising the gas's pressure.
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A.
B.
C.
D.
what’s the correct answer?
Answer:
C Gamma Rays
Explanation:
Radio waves, on the other hand, have the lowest energies, longest wavelengths, and lowest frequencies of any type of EM radiation. In order from highest to lowest energy, the sections of the EM spectrum are named: *gamma rays* ,X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves.
Match each element to the correct description of its usual behavior in a chemical reaction.Silicon (Si)Argon (Ar)Sodium (Na)Will lose electrons
Answer:
Sodium (Na) — Will lose electrons
Silicon (Si) — Will lose electrons
Argon (Ar) — No reaction
Hope this helps.
Formamide decomposes at high temperature. If 0.186 mol of formamide (HCONH2) dissociates in a 2.16 L flask at 400 K, what are the concentrations of all species present at equilibrium at 400 K? (hint: calculate concentrations first) (b) What is the total pressure in the container at equilibrium?
Answer:
a) [COHNH₂] = 0.001 mol/L, [NH₃] = [CO] = 0.085 mol/L
b) 5.59 atm
Explanation:
a) The decomposition reaction of formamide is the following:
COHNH₂(d) ⇆ NH₃(g) + CO(g)
The equilibrium constant of the reaction above is:
[tex]K_{c} = \frac{[NH_{3}][CO]}{[COHNH_{2}]} = 4.84 (400 K)[/tex]
The initial concentration of formamide is:
[tex] C_{COHNH_{2}} = \frac{\eta}{V} = \frac{0.186 moles}{2.16 L} = 0.086 mol/L [/tex]
Where: η is the number of moles and V is the volume
Now, in the equilibrium the concentration of all species is:
COHNH₂(d) ⇆ NH₃(g) + CO(g)
0.086 - x x x
[tex] K_{c} = \frac{[NH_{3}][CO]}{[COHNH_{2}]} = \frac{x*x}{0.086 - x} [/tex]
[tex] 4.84*(0.086 - x) -x^{2} = 0 [/tex]
By solving the above equation for x we have:
x = 0.085 mol/L = [NH₃] = [CO]
[COHNH₂] = 0.086 - 0.085 = 0.001 mol/L
Therefore, the concentrations of all species present at equilibrium at 400 K is [NH₃] = [CO] = 0.085 mol/L and [COHNH₂] = 0.001 mol/L.
b) To find the total pressure in the container we need to find first the constant Kp as follows:
[tex] K_{p} = K_{c}*RT^{\Delta n} [/tex]
Where R is the gas constant = 0.082 Latm/(Kmol), T is the temperature = 400 K and Δn = 1
[tex] K_{p} = K_{c}*RT^{\Delta n} = 4.84*(0.082*400)^{1} = 158.8 [/tex]
Now, the total pressure is:
[tex] p_{T} = p_{COHNH_{2}} + p_{NH_{3}} + p_{CO} [/tex]
The pressure of COHNH₂ can be found using Ideal Gas Law:
[tex] P = \frac{nRT}{V} = \frac{0.186 moles*0.082 L*atm/(K*mol)*400 K}{2.16 L} = 2.82 atm [/tex]
Using the equilibrium constant we can find the pressure of NH₃ and CO:
COHNH₂(d) ⇆ NH₃(g) + CO(g)
2.82 - x x x
[tex] K_{p} = \frac{P_{NH_{3}}*P_{CO}}{P_{COHNH_{2}}} [/tex]
[tex] 158.8*(2.82 - x) - x^{2} = 0 [/tex]
By solving the above equation for x we have:
[tex] x = P_{NH_{3}} = P_{CO} = 2.77 atm [/tex]
[tex] P_{COHNH_{2}} = 2.82 - 2.77 = 0.05 atm [/tex]
Thus, the total pressure is:
[tex] p_{T} = p_{COHNH_{2}} + p_{NH_{3}} + p_{CO} = (0.05 + 2.77 + 2.77) atm = 5.59 atm [/tex]
Hence, the total pressure in the container at equilibrium is 5.59 atm.
I hope it helps you!
Which of the following is not sublimable? * 1 point Dry ice Calcium chloride Ammonium chloride
fasttttt
Answer:
Calcium chloride
Explanation:
Sublimation is the process whereby a solid substance is converted to gas when heat is applied or when exposed to an environment with a higher temperature.
Solid normally gets converted to the liquid phase before reaching the gaseous phase but these substances gets converted from solid straight to gas
Solid—> Gas
Dry ice( solid CO2) and Ammonium chloride undergo sublimation while Calcium chloride doesn't.
Hexane is a chain organic compound that has the formula C6H14. What type of organic compound is hexane? Alcohol Amine Ether Hydrocarbon
Answer: [tex]C_6H_{14}[/tex] is a hydrocarbon.
Explanation:
Alcohols are the compounds which contain -OH as the functional group. Example: [tex]CH_3OH[/tex]
Amine are the compounds which contain [tex]-NH_2[/tex] as the functional group. Example: [tex]CH_3NH_2[/tex]
Ether are the compounds which contain [tex]ROR[/tex] as the functional group. Example: [tex]CH_3OCH_3[/tex]
Hydrocarbons are defined as the compounds in which bonds are present between carbon and carbon atoms. Hydrocarbons with single bond between carbon and carbon atoms are called as alkanes.The general formula for alkanes is [tex]C_nH_{2n+2}[/tex] Example: [tex]C_6H_{14}[/tex] which is named as hexane.
Answer:
D) Hydrocarbon
Explanation:
Completed the test and got it right
How many moles of sodium hydroxide would react with 1 Mole of sulphuric acid?
Answer:
Two moles.
Explanation:
Sulphuric (sulfuric) acid [tex]\rm H_2SO_4[/tex] is a diprotic acid. When one mole of [tex]\rm H_2SO_4[/tex] molecules dissolve in water, two moles of [tex]\rm H^{+}[/tex] ions would be produced.
[tex]\rm H_2SO_4 \to 2\, H^{+} + {SO_4}^{2-}[/tex].
On the other hand, sodium hydroxide [tex]\rm NaOH[/tex] is a monoprotic base. When one mole of [tex]\rm NaOH[/tex] formula units dissolve in water, only one mole of hydroxide ions [tex]\rm OH^{-}[/tex] would be produced.
[tex]\rm NaOH \to Na^{+} + OH^{-}[/tex].
Note that [tex]\rm H^{+}[/tex] and [tex]\rm OH^{-}[/tex] react at a one-to-one ratio:
[tex]\rm H^{+} + OH^{-} \to H_2O[/tex].
As a result, it would take [tex]2\; \rm mol[/tex] of [tex]\rm OH^{-}[/tex] to react with the [tex]\rm 2\; mol[/tex] of [tex]\rm H^{+}[/tex] that was released when [tex]1\; \rm mol[/tex] of [tex]\rm H_2SO_4[/tex] is dissolved in water. Since one mole of [tex]\rm NaOH[/tex] formula units could produce only one mole of [tex]\rm OH^{-}[/tex], it would take [tex]\rm 2\; mol[/tex] of [tex]\rm NaOH[/tex] formula units to produce that [tex]2\; \rm mol[/tex] of [tex]\rm OH^{-}[/tex] for reacting with [tex]1\; \rm mol[/tex] of [tex]\rm H_2SO_4[/tex].
what can a criminal do to make the bullet not match the gun hurry plz
The concentration of 1130+ in a solution is found to be 1.75 X 10-8 M 250C. Find [OH].
Answer:
[OH] = 6.31 * 10^-7 M
Explanation:
Mathematically;
pH + pOH = 14
Mathematically;
pH = -log [H3O+]
also;
pOH = -log [OH]
From the question; [H3O+] = 1.75 * 10^-8 M
pH = -log [1.75 * 10^-8]
pH = 7.76
since pH is normally given to 1 decimal place
we can say pH = 7.8
Now;
pH + pOH = 14
pOH = 14-7.8
pOH = 6.2
now pOH = -log [OH]
[OH] = -antilog 6.2
[OH] = 6.31 * 10^-7 M
Balance the equation.
SiO2 +
CaC2 →
Si +
CaO +
CO2
Answer:
5SiO[tex]_{2}[/tex] + 2CaC[tex]_{2}[/tex] → 5Si + 2CaO + 4CO[tex]_{2}[/tex]
5 2 5 2 4 are your answers.
If the temperature outside is 297 what is this temperature in degrees celsius
Answer:
147.222 degrees C
Explanation:
assuming its 297 F it should be correct
The temperature outside is 297°F then this temperature in celsius is equal to 147.22 °C.
How to convert from Fahrenheit to celsius?Temperature can be described as a physical quantity that expresses quantitatively the perceptions of hotness or coldness. The most general scales are the Celsius scale with (°C), the Fahrenheit scale (°F), and the Kelvin scale (K), the latter being used predominantly for scientific purposes.
Fahrenheit to Celsius formula can be used to change the temperature from the scale Fahrenheit to degrees Celsius.
The formula that can be used to convert Fahrenheit to Celsius is given below:
[tex]\dusplaystyle ^oC = (^oF - 32) \times \frac{5}{9}[/tex]
Here, F represents the temperature in Fahrenheit, and C represents the temperature in Celsius.
Given the temperature in Fahrenheit = 297 °F
[tex]\dusplaystyle T( ^oC) = (297 - 32) \times \frac{5}{9}[/tex]
T = 147.22 °C
Therefore, the given temperature in celsius is equal to 147.22 °C.
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How many significant figures does 5.750 have?
Answer:
4
Explanation:
What is a criterion for all products made using the process of technological design? The product must be cheaper than similar products.
The product must be available to any user who wants it.
The product must solve the problem for which it was designed.
The product must be capable of solving a variety of problems.
Answer:
C. The product must solve the problem for which it was designed.
Explanation:
Technological design is the study, development and application of technological process with the intent of designing a product to solve required problem.The process could be based on the use of a computer.
Generally, technological process and development always tend to design a problem solver product. Through this process, more new technologies are produced.
Therefore in technological process, the product must solve the problem for which it was designed.
Answer:
C) The product must solve the problem for which it was designed.
