What are three possible dangers when dealing with acids with low pH and bases with high pH
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What effect does the presence of dissolved sodium fluoride have on the dissociation equilibrium of hydrofluoric acid? (select all three that apply)...The percent dissociation of HF is reduced by the presence of dissolved NaF. THe pH of the solution containing NaF and HF would be higher than that of a solution of HF only. The presence of NaF drives the reaction towards the HF side to reach equilibrium. The concentration of H+ is higher in an HF solution containing NaF. The pH of the solution containing NaF and HF would be lower than that of a solution of HF only. The presence of the dissolved NaF does not affect the HF equilibrium reaction nor the equilibrium concentrations.
What are the elements in the first vertical line of the periodic table?
In Organic Chemistry, what does the letter "X" represent?a. a hydrogen c. a carbon b. a halogen d. an alkane
3 In the wave-mechanical model of the atom, an orbital is defined as(1) a region of the most probable proton location(2) a region of the most probable electron location(3) a circular path traveled by a proton around the nucleus(4) a circular path traveled by an electron around the nucleus
What is the percent yield of NH3 if the reaction of 26.3 g of H2 produces 79.0 g of NH3?
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The balanced chemical reaction is:
N2 + 3H2 = 2NH3
We are given the amount of H2 being reacted. This will be our starting point.
26.3 g H2 (1 mol H2 / 2.02 g H2) 2 mol O2/3 mol H2) ( 17.04 g NH3 / 1mol NH3) = 147.90 g O2
Percent yield = actual yield / theoretical yield x 100
Percent yield = 79.0 g / 147.90 g x 100
Percent yield = 53.4%
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Answer:
It means the waves collides and constructive interference occurred.
Explanation:
If the two waves coming from the opposite direction collide with each other, there are two way of their interference.
- Constructive interference: An interference which results in the increase in energy. And it is when crust of a wave comes on the crust of second wave.
- Destructive interference: An interference which results in decrease in energy of the resulting wave and colliding waves cancel the result of each other.
Hence in experiment there will be constructive interference.
Answer:
C.
Explanation:
I took the test!
Which type of chemical reaction is represented by this equation?
(1) synthesis (2) decomposition
(3) single replacement (4) double replacement
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Answer : The correct option is, (1) synthesis
Explanation :
Synthesis reaction : A type of chemical reaction in which multiple reactants combine to form a single product.
It is represented as,
Decomposition reaction : A type of chemical reaction in which a single reactant decomposes into two or more products.
It is represented as,
Single replacement reaction : A type of chemical reaction where the more reactive element replace the less reactive element.
It is represented as,
(A is more reactive element and B is less reactive element)
Double replacement reaction : A type of chemical reaction in which a positive cation and a negative anion of two reactants exchange their places to form two new products.
It is represented as,
(A and C are the cations, B and D are the anions)
The given balanced reaction is,
The given reaction is an example of synthesis reaction in which lithium combine with the nitrogen to form a single product as lithium nitride.
Hence, the correct option is, (1) synthesis reaction
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Answer:
Ionic Compounds have high boiling and melting points as they're very strong and require a lot of energy to break. The electrostatic forces of attraction between oppositely charged ions lead to the formation of ions. Ionic compounds form crystals. These compounds are brittle and break into small pieces easily.
Explanation:
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Answer : The moles ratio between the nitrogen gas and hydrogen gas are, 1 : 3 respectively.
Explanation :
The balanced chemical reaction will be,
Mole ratio : It is defined as the ratio of the number of moles of the substances whose ratio is to be calculated.
In a chemical reaction, the stoichiometric coefficients represents the number of moles.
By stoichiometry of the reaction we can say that,
1 mole of nitrogen gas reacts with 3 moles of hydrogen gas to produce 2 moles of ammonia gas.
Hence, the mole ratio of between the nitrogen gas and hydrogen gas are, 1 : 3 respectively.
For instance you have a chemical reaction of N2 + 3H2 -> 2NH3. The number of moles of N2 is 1, H2 is 3 and NH3 is 2. The mole to mole ratio between nitrogen gas and hydrogen gas is 1/3 or 1 is to 3.
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P1V1/T1 = P2V2/T2
Therefore, just substitute in and solve:
(105 kPa)(220.0 mL)/(275K) = ?kPa(95.0 mL)/(310 K)
Solve for ?
Answer is 274. kPa
The new pressure of the sample of helium gas in a cylinder with a movable piston is 274 kPa.
Option 4)274 kPa is the correct answer.
What is Combined gas law?
Combinedgas law put together both Boyle's Law, Charles's Law, and Gay-Lussac's Law. It states that "the ratio of the product of volume and pressure and the absolute temperature of a gas is equal to a constant.
It is expressed as;
P₁V₁/T₁ = P₂V₂/T₂
Given the data in the question;
- Initial volume V₁ = 220.0mL = 0.22L
- Initial pressure P₁ = 105kPa = 1.03627atm
- Initial temperature T₁ = 275K
- Final volume V₂ = 95.0mL = 0.095L
- Final temperature T₂ = 310K
- Final pressure P₂ = ?
To calculate the new temperature of the gas, we substitute our given values into the equation above.
P₁V₁/T₁ = P₂V₂/T₂
P₁V₁T₂ = P₂V₂T₁
P₂ = (P₁V₁T₂) / V₂T₁
P₂ = ( 1.03627atm × 0.22L × 310K ) / ( 0.095L × 275K )
P₂ = 70.673614LatmK / 26.125LK
P₂ = 2.705atm
P₂ = (2.705 × 101.325)kPa
P₂ = 274 kPa
The new pressure of the sample of helium gas in a cylinder with a movable piston is 274 kPa.
Option 4)274 kPa is the correct answer.
Learn more about the combined gaslaw here: brainly.com/question/25944795
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