VSEPR theory predicts that an atom with one lone pair and three bonding pairs (such as the N-atom in aniline) will have a tetrahedral electron geometry and a trigonal pyramidal molecular geometry due to steric repulsions between H-atoms and the N-atom lone pair. However, in question 5 you observed that the N-atom in aniline is not perfectly sp3 hybridized (i.e. the hybridization is different from that predicted for a tetrahedral electron geometry). Briefly describe all of the factors that result in the calculated hybridization of the N-atom lone pair
Answer: The lone pair of electron on nitrogen is accommodated in a 2p orbital hence it interacts with the pi system in aniline.
Explanation:
Aniline is less basic than amines. This is because, the nitrogen atom in aniline is not purely sp3 hybridized. Its actual hybrization state is closer to sp2 because the lone pair on nitrogen is accommodated in a 2p orbital. The nitrogen atim in aniline is planar and its
lonely pair interacts with the pi electron system of aniline. This makes the lone pair unavailable for protonation hence aniline is less basic than amines.
Atomic models have changed over the decades. Two early atomic models can be seen here. There is a dramatic change in the models, as Rutherford experimented with the cathode ray tube and charged particles. Differentiate between the two models.
Question 14 options:
A) Rutherford's model shows negative charges dispersed throughout the atom.
B) Rutherford's model shows negative particles orbiting the central nucleus.
C) Rutherford's model shows the positive charge of an atom as a very small area.
D) Thomson's model shows at sea of negative charged particles surrounding a small, positive area.
Answer:
C. Rutherford's model shows the positive charge of an atom as a very small area.
Explanation:
Rutherford's model shows the positive charge of an atom as a very small area.
The Thompson model of the atom depicted the atom as a sphere of positively charges into which negative charges were embedded. This is called the plum - pudding model of the atom.
The Rutherford's model of the atom depicted the atom as having a core containing positive charges. This core occupies a very small area and is surrounded by electrons. This is called the planetary model.
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Cl2 reacts with the element Sr to form an ionic compound. Based on periodic properties, identify a molecule, X2, that is likely to to react with Sr in a way similar to how Cl2 reacts with Sr. Justify your choice.
Answer:
The bromine molecule, Br2 will likely react with Sr in a similar way to chlorine molecule, Cl2.
Explanation:
Chlorine belongs to group 7 of the periodic table. Elements in this group are known as halogens. Its molecule has the formula Cl2. The next element in the group after chlorine is bromine. Its molecule has a formula Br2. It has similar properties as chlorine, therefore, it would react with Strontium in a similar way to chlorine.
Elements belonging to the same group of the periodic the table have similar chemical properties as they contain the same number of valence electrons. Chlorine and Bromine both belong to group 7 of the periodic table and each have seven valence electrons. They both react with metals to form salts even though reaction with chlorine is more vigorous as it is more reactive than bromine. They both form negatively-charged ions with a charge of -1.
Reaction of Strontium with the halogens:
With chlorine: Sr + Cl2 ---> SrCl2
With bromine: Sr + Br2 ---> SrBr2
The salts formed are both crystalline salts with high melting and boiling points.
A molecule X₂ that will likely react with Sr in a way similar to how Cl₂ reacts with Sr is I₂
Strontium, Sr is a group 2 element.
Chlorine, Cl is a group 17 element. All members of this group have 7 valence electrons and as such, they have similar chemical properties. Other members of this group include fluorine (F), bromine (Br), iodine (I).
Chlorine molecule (Cl₂) reacts with strontium (Sr) as follow:
Cl₂ + Sr —> SrCl₂Iodine molecule (I₂) will also reacts in the same way since they are in the same group.
I₂ + Sr —> SrI₂Learn more: https://brainly.com/question/4725757
ASAP 40 POINTS PLUS BRAINLIEST PLZ IM ON TIMER
How does altitude affect climate patterns in a region?
Areas at high elevations have cooler temperatures.
Air continues to warm as it rises to a higher elevation.
Tropical regions do not have many differences in altitude.
High-altitude areas have less variation in seasonal temperatures.
Answer:
Answer is A
Areas at high elevations have cooler temperatures.
I presume you're doing earth science B?
Answer: It is A) Areas at high elevations have cooler temperatures.
Explanation: I got it correct.
PSYCHOLOGYWhich of the following statements is not correct concerning the relationship between attention and perception? Focusing one’s attention on something in the environment is necessary in order to perceive it. Individuals have the ability to focus attention on a specific stimulus in the midst of surrounding activity. Whether or not people perceive information as meaningful influences their attention to it. Individuals can easily detect changes in the environment when they are absorbed in a task.
Answer:
The answer is Individuals can easily detect changes in the environment when they are absorbed in a task.
Explanation:
The statements is not correct concerning the relationship between attention and perception is that individuals can easily detect changes in the environment when they are absorbed in a task.
What is psychology?Psychology is defined as the scientific discipline that studies mental state and processes and behavior in human and other animals.
It can also be defined as the scientific study of mind and behavior.
Environment is defined as the sum total of all the living and non living elements and there effect that influences human life.
Thus, the statements is not correct concerning the relationship between attention and perception is that individuals can easily detect changes in the environment when they are absorbed in a task.
To learn more about psychology, refer to the link below:
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#SPJ2
How many moles are in 8.8 x 1024 atoms of magnesium?
Answer:
15 mol Mg
Explanation:
Step 1: Find conversions
Avagadro's Number: 6.022 × 10²³
Step 2: Use Dimensional Analysis
[tex]8.8(10)^{24} \hspace{3} atoms \hspace{3} Mg(\frac{1 \hspace{3} mol \hspace{3} Mg}{6.022(10)^{23} \hspace{3} atoms \hspace{3} Mg} )[/tex] = 14.6179 mol Mg
Step 3: Simplify
We have 2 sig figs.
14.6179 mol Mg ≈ 15 mol Mg
Why are the so many volcanoes in california help pls!!
Explanation:
During and after an explosive or effusive eruption volcanic hazards are still a concern. Unstable ground, noxious gas emissions, and intense heat from fumaroles (steam vents) and hot springs are dangerous. Loose volcanic debris on the flanks of the volcano can be mobilized by heavy rainfall or melting snow and ice, forming powerful floods of mud and rock (lahars) resembling rivers of wet concrete. These can rush down valleys and stream channels, destroying roads and bridges and carrying away entire buildings
hope the answer is correct
2. A gas has volume of 4.2L at 110 kPa. If temperature is constant, find the pressure of gas when the volume is change to 11.3L.
Answer:
40.88 kPa.
Explanation:
Given that,
Volume, V₁= 4.2 L
Pressure, P₁ = 110 kPa
We need to find the pressure of the gas when the volume is changed to 11.3L at constant temperature.
According to Boyle's law, at constant temperature, volume is inversely proportional to the pressure. Mathematically,
[tex]P_1V_1=P_2V_2\\\\P_2=\dfrac{P_1V_1}{V_2}\\\\P_2=\dfrac{4.2\ L\times 110\ kPa}{11.3\ L}\\\\P_2=40.88\ kPa[/tex]
So, the new pressure is 40.88 kPa.
What is the oxidation state of Cobalt (iii)
A.+2
B.+5
C.-3
D.+3
Answer:
D. +3
Explanation:
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What is the difference between mass number and average atomic mass?
(choose all that apply)
A: Mass number is a whole number, average atomic mass is a decimal number
B: Mass number is protons + neutrons, average atomic mass is all the different protons + neutrons
C: Mass number is the mass of one element, average atomic mass is the number of
protons
D: There is no difference
Answer:
the answer is c. I think
Explanation:
Acetylsalicylic acid (ASA) _____.
A.is used to treat acne
B.reduces pain and fever
C.is used as an anesthetic
D.causes acid rain
Answer:
b. reduces pain and fever
✅Acetylsalicylic acid (ASA) _____. reduces pain and fever
IamSugarbee
The most common form of elemental sulfur is S8, in which eight sulfur atoms linked in a ring of single bonds. At high temperature, in the gas phase, S8 can break apart to give S2, the sulfur analog of molecular oxygen:
S8(g) 4S2(g) ΔH = +239 kJ at T = 800 K
Using the appropriate data in Table 3-2 S-S 240 calculate the S=S double-bond energy (in kJ/mol) in S2(g).
Answer:
Explanation:
In S₈ , there are 8 single bonds which breaks up first . Energy absorbed
= 8 x 240 = 1920 kJ
In S₈ four double bonds of S₂ are formed . Let bond energy be x . In this process energy will be released . energy released in four S₂ molecules formed = 4 x
Given
1920 + 4x = 239
4x = 239 - 1920
x = - 420.25 kJ .
So bond energy of S₂ = 420.25 kJ .
Hydrogen gas at a pressure of 740. mmHg has a volume of 2.00 L at a temperature of 25.0°C. What is the temperature of this gas at 3.50 L and
standard pressure?
Answer:
The final temperature of hydrogen gas is 537.63 K.
Explanation:
Given data:
Initial volume = 2.00 L
Initial pressure = 740 mmHg (740/760 = 0.97 atm)
Initial temperature = 25 °C (25 +273 = 298 K)
Final temperature =?
Final volume = 3.50 L
Final pressure = standard = 1 atm
Formula:
According to general gas equation:
P₁V₁/T₁ = P₂V₂/T₂
P₁ = Initial pressure
V₁ = Initial volume
T₁ = Initial temperature
P₂ = Final pressure
V₂ = Final volume
T₂ = Final temperature
Solution:
P₁V₁/T₁ = P₂V₂/T₂
T₂ = P₂V₂T₁ / P₁V₁
T₂ = 1 atm × 3.5 L × 298 K / 0.97 atm × 2.00 L
T₂ = 1043 atm .L. K / 1.94 atm. L
T₂ = 537.63 K
what is a a metamorphic rock
Answer:
A metamorphic rock is rock that comes from mountains and its little rocks squished together
Explanation:
Select all that apply. When the products of a reaction have more energy than the reactants: The reaction is endothermic. The reaction is exothermic. The reactants gave up energy.
Answer:
the reaction is exothermic
Explanation:
heat will be produced from the reaction
Answer:
The reaction exothermic
Reactants gave up energy ;) Have a good day
basically everything is in the picture, and i dont really understand please help.
Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. A solution containing 3.80 g of sodium carbonate is mixed with one containing 5.43 g of silver nitrate.
Part A)
How many grams of sodium carbonate are present after the reaction is complete?
Part B)
How many grams of silver nitrate are present after the reaction is complete?
Part C)
How many grams of silver carbonate are present after the reaction is complete?
Part D)
How many grams of sodium nitrate are present after the reaction is complete?
Answer:
Part A) [tex]m_{Na_2CO_3}^{leftover}=3.74g[/tex]
Part B) Nothing as it is the liming reactant.
Part C) [tex]m_{Ag_2CO_3}=4.42gAg_2CO_3[/tex]
Part D) [tex]m_{NaNO_3} =2.72gNaNO_3[/tex]
Explanation:
Hello,
In this case, the undergoing chemical reaction is:
[tex]Na_2CO_3(aq)+2AgNO_3(aq)\rightarrow Ag_2CO_3(s)+2NaNO_3(aq)[/tex]
Thus, in order to proceed, we first need to identify the limiting reactant is it yielding the least moles of silver carbonate for instance, thus, for the given mass of sodium carbonate (molar mass 106 g/mol) and silver nitrate (molar mass 170 g/mol) we obtain for silver carbonate:
[tex]n_{Ag_2CO_3}^{by\ Na_2CO_3}=3.80gNa_2CO_3*\frac{1molNa_2CO_3}{106gNa_2CO_3}*\frac{1molAg_2CO_3}{1molNa_2CO_3} =0.0359molAg_2CO_3\\\\n_{Ag_2CO_3}^{by\ AgNO_3}=5.43gAgNO_3*\frac{1molAgNO_3}{170gAgNO_3}*\frac{1molAg_2CO_3}{2molAgNO_3} =0.0160molAg_2CO_3[/tex]
In such a way, we can see that the silver nitrate yields less amount of silver carbonate, that is why it is the limiting reactant. Thus, we answer:
Part A) Since sodium carbonate is the excess reactant, we need to compute the consumed grams by the limiting silver nitrate as shown below:
[tex]m_{Na_2CO_3}^{consumed}=5.43gAgNO_3*\frac{1molAgNO_3}{170gAgNO_3}*\frac{1molNa_2CO_3}{2molAgNO_3} *\frac{106gNa_2CO_3}{1molNa_2CO_3} =1.69gNa_2CO_3[/tex]
Therefore, the leftover of sodium carbonate is:
[tex]m_{Na_2CO_3}^{leftover}=5.43g-1.69g=3.74g[/tex]
Part B) Since silver nitrate is the limiting reactant no leftover are present after the reaction as it was all consumed.
Part C) As the 5.43 g of silver nitrate yield 0.0160 moles of silver carbonate, the corresponding mass is computed as shown below:
[tex]m_{Ag_2CO_3}=0.0160molAg_2CO_3*\frac{276gAg_2CO_3}{1molAg_2CO_3}=4.42gAg_2CO_3[/tex]
Part D) Finally, via stoichiometry, we compute the grams of sodium nitrate that are yielded:
[tex]m_{NaNO_3}=5.43gAgNO_3*\frac{1molAgNO_3}{170gAgNO_3}*\frac{2molNaNO_3}{2molAgNO_3} *\frac{85gNaNO_3}{1molNaNO_3} =2.72gNaNO_3[/tex]
Best regards.
You have a mixture of salt, sand, iron fillings, and large rocks in a big bucket. Your goal is to separate the four different items into their own bucket. Write a detailed procedure showing the step by step process on to separate each item.
Answer:Please see answers in the explanation column
Explanation:
In a mixture of salt, sand, iron fillings, and large rocks in a big bucket.
The process of separation is as follows:
Ist step ---
Use of magnet : Because Irons are attracted to magnet, Introducing a magnet to the mixture will cause the iron fillings to cling to the magnet leaving the other constituents behind
2nd Step
we eliminate the large rocks by carefully Sorting or picking them out since they are large and visible or we use a MESH or Sieve and carry out the separation by pouring the rock, salt and sand mixture on top of the mesh with continuous shaking so as to filter the smaller particles,The smaller particles will pass through the mesh while the bigger rocks remains on top.
3rd Step
We are left with the salt and sand. we will then introduce water to mix the salt and sand. salt dissolves completely in water while the sand settles as the bottom of the container. We can then separate the sand by decantation and then filtration to remove any left over sand.
4th step
Evaporation is then carried out on the salt solution to separate the salt from water.
How many formula units make up 36.2 g of magnesium chloride (MgCl2)?
Answer:
2.29 × 10²³ formula units of MgCl₂
Explanation:
Given data:
Mass of MgCl₂ = 36.2 g
Number of formula units = ?
Solution:
The given problem will be solved by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
For example,
18 g of water = 1 mole = 6.022 × 10²³ molecules of water = 6.022 × 10²³ formula units of water.
In 36.2 g of MgCl₂:
Number of moles = mass / molar mass
Number of moles = 36.2 g / 95.211 g/mol
Number of moles = 0.38 mol
1 mole = 6.022 × 10²³ formula units
0.38 mol / 1mol × 6.022 × 10²³ formula units
2.29 × 10²³ formula units of MgCl₂
What is the correct relationship between a molecule and a compound? *
2 points
All molecules are compounds, but not all compounds are molecules.
All compounds are molecules, but not all molecules are compounds.
Only compounds make a molecule.
Only molecules make a compound.
Answer:
All compunds are molecules, but not all molecules are compounds.
Explanation:
Not all molecules are made of compounds because some molecules only have one element, of only one type of atom.
ou are performing a ton test for household ammonia. you place 150 ml of distilled water in a 500 ml beaker first. you added 1 ml of the household ammonia and add distilled water to top up a total volume of 200 ml, the odor can be detected in this dilution. take 50 ml of the above diluted sample as an intermediate sample and continually dilute it to 200 ml and the odor is still detectable. you decided to reduce to 10 ml of the first time diluted household ammonia and the odor was just detectable. how much is the ton of the household ammonia
Answer: the ton of the household ammonia is 4000
Explanation:
Given that;
the initial ammonia in 200mL sample = 1ml
also decided to reduce to 10 ml of the first time diluted household ammonia and the odor was just detectable
10ml ammonia content = 1/200 * 10 = 1/20ml
we know that total volume is 200 ml
therefore the TON of household ammonia will be = total volume / volume of ammonia
TON = total volume / volume of ammonia
we substitute
TON = 200 / (1/20)
TON = 200 / 0.05
TON = 4000
therefore the ton of the household ammonia is 4000
which two chemists organized elements based on properties such as how the elements react or whether they are solid or liquid
Answer: Dmitri Mendeleev and Henry Moseley developed their periodic tables about forty years apart. During that time, many discoveries in chemistry were made.
Explanation:
Hope this helps
What mass (in g) of nitrogen are needed to react completely with 5.8g of hydrogen?
[tex]N_{2}[/tex] + [tex]3H_{2}[/tex] —> [tex]2NH_{3}[/tex]
Answer:
Explanation:
mass of N2 Mass of3 H2
2x (14) g/mole 3x(2x1) g/mole
X g 5.8 g
mass of nitrogen = 27 g
Use your periodic table to answer the following question.
A scientist was looking at two elements, Titanium (Ti) and Uranium (U). Which observation would be a true statement?
Question 7 options:
Uranium is larger than Titanium and it has higher electronegativity
Titanium is larger than Uranium and it has a higher electronegativity
Uranium is larger than Titanium and it has a higher ionization energy
Titanium is smaller than Uranium and has a higher ionization energy
Answer:
Option B: Uranium is larger than Titanium and it has a higher ionization energy
Explanation:
From left to right across the periodic table, electronegativity increases.
So, going from left to right across the periodic table, Titanium comes before uranium. Thus;
Uranium will have a higher electronegativity.
So option A is false
From left to right across the periodic table, ionization energy increases.
Thus;
Uranium will have a higher ionization energy than Titanium.
Thus; option B is correct.
Help me find the answer please
Answer:
1. A
2. C
3. B
4. G
5. H
6. D
7. F
8. E
Explanation:
Where are the instructions that tell the cell everything it needs to survive?
mitochondrion
nucleolus
endomembrane system
ribosome
Answer:
Nucleolus
Explanation:
It holds the DNA
Answer:
Nucleolus
Explanation:
I did the test. You’re welcome. ✌️
If methane undergo combustion, what mass of methane must be burnt to produce 27.5 g of CO2?
Answer:
Mass of methane burnet 10.025 g.
Explanation:
Given data:
Mass of CO₂ produced = 27.5 g
Mass of methane burnet = ?
Solution:
Balanced chemical equation.
CH₄ + 2O₂ → CO₂ + 2H₂O
First of all we will calculate the number of moles of CO₂ produced.
Number of moles = mass/ molar mass
Number of moles = 27.5 g/ 44 g/mol
Number of moles = 0.625 mol
Now we will compare the moles of CO₂ with CH₄.
CO₂ : CH₄
1 : 1
0.625 : 0.625
0.625 moles of CH₄ are burnet.
Mass of methane burned:
Mass = number of moles × molar mass
Mass = 0.625 mol × 16.04 g/mol
Mass = 10.025 g
Calculate the volume of an object (in mL) if the density of the object is 4.08 g/mL and the mass of the object is 10.02 g.
Round your answer to one decimal.
Answer:
The answer is 2.5 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\ [/tex]
From the question
mass of object = 10.02 g
density = 4.08 g/mL
The volume of the object is
[tex]volume = \frac{10.02}{4.08} \\ = 2.4558823...[/tex]
We have the final answer as
2.5 mL to one decimal placeHope this helps you
What are the main differences between plang and animal cells
_________energy from the sun
Answer:
radiant energy, solar energy
During nuclear fusion, radiant energy and solar energy from the core of the Sun is released. Hope it helps!
