Answer:
The correct answer is - True.
Explanation:
Grignard reagents used in addition to carbonyl compounds to give new carbon to carbon bonds. In order to the addition of carbon bonds of the organometallic compound acts as a nucleophile to add to the positive carbon of the carbonyl forming an alkoxide ion intermediate.
Alkoxide ions form in first step reactions by the reaction of phenyl magnesium bromide. Aqueous acid is used in the second step to protonate the alkoxide ion and form the product alcohol, it is hydrolysis the product of the first step.
how many sulfur atoms are there in 5.5 moles?
Answer:
3.31x10^24 atoms
Explanation:
1 mole of S atom = 6.023^23 atoms
5.5 moles = 5.5 x 6.023^23
= 3.31x10^24 atoms
The enthalpy of solution of NaCl in water is about 3.88 kJ/mol. However, the solubility of NaCl in water is relatively high. Which statement about the entropy of the solution process explains why NaCl dissolves in water even though the process is endothermic?
a. the entropy increases when NaCl dissolves in water
b. the entropy remains the same when NaCl dissolves in water
c. the entropy decreases when NaCl dissolves in water
d. entropy has nothing to do with the solution process
We have that the statement that explains why NaCl dissolves in water even though the process is endothermic the given as,
The entropy increases when NaCl dissolves in water.Option A
HeatGenerally ,Sodium chloride is crystalline salt, when its dissolved is H20 , it dissociates its ion, the ions are scattered through out the solution which results in increased in randomness .
Therefore, the entropy increases when NaCl dissolves in water,
Option A
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Goodyear tires are listed with 29.72 psi pressure limits in the summer, with 10.22 L of air. In the winter, however, the volume decreases to 7.19 L because of the colder weather. What would the be the new pressure?
Answer:
42.24 psi.
Explanation:
From the question given above, the following data were obtained:
Initial pressure (P₁) = 29.72 psi
Initial volume (V₁) = 10.22 L
Final volume (V₂) = 7.19 L
Final pressure (P₂) =?
The final pressure can be obtained by applying the Boyle's law equation as follow:
P₁V₁ = P₂V₂
29.72 × 10.22 = P₂ × 7.19
303.7384 = P₂ × 7.19
Divide both side by 7.19
P₂ = 303.7384 / 7.19
P₂ = 42.24 psi
Therefore, the final pressure is 42.24 psi
How many molecules does 1.25 grams of C2H4 represent?
Explanation:
hope the picture above make sense:)
Do all the words in a sentence do the same job
Answer:
No all the words in a sentence have their different job..stay safe healthy and happyWhat type of material is commonly used in 3d Printing?
O Wood
O Honey
O Plastics
O Stone
Don’t know pls help fast
Answer:
Plastics!!!!!
Explanation:
How do you print stone or honey or wood you melt plastic or filiment to print stuff
1. How much heat (in calories) is needed to raise 20 g of H2O from 5°C to 40°C? (c = 1.0 cal/g °C)
Answer:
700 calories
Explanation:
Using the formula below:
Q = m × c × ∆T
Where;
Q = amount of heat required (calories)
m = mass of substance (g)
c = specific heat of substance (cal/g°C)
∆T = change in temperature (°C)
According to this question, the following information was provided;
Q = ?
m = 20g
c = 1.0 cal/g °C
∆T = 40°C - 5°C = 35°C
Using the formula; Q = m × c × ∆T
Q = 20 × 1 × 35
Q = 700 calories
Hence, 700 cal of heat energy is needed to raise 20 g of H2O from 5°C to 40°C.
Why do atoms react with each other?
Answer:
Atoms react with atoms of other elements to form compounds because , every atom wants to attain noble gas configuration . Atoms interact with one another by transferring or sharing electrons that are furthest from the nucleus. These outer electrons govern the chemical properties of the element.
Explanation:
~Hope this helps
0.350 moles of H2O is equivalent to (blank amount) molecules of water.
Answer:
is has around 1/5 lyrics of water
Answer:
[tex]1 \: mole \: = \: 6.02 \times {10}^{23} \: molecules \\ 0.350 \: moles \: = \: (0.350 \times 6.02 \times {10}^{23} ) \: molecules \\ = 2.107 \times {10}^{23} \: molecules[/tex]
How did oxygen first enter Earth's atmosphere?
A. Meteorite impacts
B. Breakdown of Precambrian rocks
C. Biological processes
D. Volcanic outgassing
Answer:
I think c biological processes
What volume of 10 M HCl must be used to create 100 mL of a 5 M solution.
Answer: A volume of 50 mL of 10 M HCl must be used to create 100 mL of a 5 M solution.
Explanation:
Given: [tex]V_{1}[/tex] = ?, [tex]M_{1}[/tex] = 10 M
[tex]V_{2}[/tex] = 100 mL, [tex]M_{2}[/tex] = 5 M
Formula used to calculate the volume is as follows.
[tex]M_{1}V_{1} = M_{2}V_{2}[/tex]
Substitute the values into above formula as follows.
[tex]M_{1}V_{1} = M_{2}V_{2}\\10 M \times V_{1} = 5 M \times 100 mL\\V_{1} = 50 mL[/tex]
Thus, we can conclude that a volume of 50 mL of 10 M HCl must be used to create 100 mL of a 5 M solution.
What volume of solution is needed to prepare a 0.50M solution of sodium hydroxide using 2.0 g of solute? Show your work
Answer:
0.10 L
Explanation:
First we convert the 2.0 grams of solute (meaning sodium hydroxide) into moles, using its molar mass:
2.0 g ÷ 40 g/mol = 0.05 mol NaOHThen we can calculate the required volume of solution, using the definition of molarity:
Molarity = moles / litersliters = moles / molarity0.05 mol / 0.50 M = 0.10 LWhat is Climate Change and how can it effect plants?
Answer:
Climate change will make plants—and us—thirstier. The combined effects of increased CO2 levels and warmer temperatures will increase water consumption by vegetation. That will lead to water declines in streams and rivers like the Ashepoo River in South Carolina
Explanation:
Rank the following iron-carbon alloys and associated microstructures from the hardest to the softest: __________.
(a) 0.25 wt% C with coarse pearlite,
(b) 0.80 wt% C with spheroidite,
(c) 0 25 wt% C with spheroidite, and
(d) 0.80 wt% C with fine pearlite.
Justify this ranking.
Answer:
The Ranking from
Hardest to softest is as follows :
0.80 wt% C with fine pearlite.
0.80 wt% C with spheroidite
0.25 wt% C with coarse pearlite
0.25 wt% C with spheroidite
Explanation:
To find - Rank the following iron-carbon alloys and associated microstructures from the hardest to the softest. Justify this ranking.
Solution -
Ranking is as follows :
(d) 0.80 wt% C with fine pearlite.
(b) 0.80 wt% C with spheroidite
(a) 0.25 wt% C with coarse pearlite
(c) 0 25 wt% C with spheroidite
Justification -
For some wt% C,
Fine pearlite is stronger than spheroidite
and
Coarse pearlite is stronger than spheroidite.
Now,
Due to carbon content,
0.80 wt% C with spheroidite is stronger than 0.25 wt% C with coarse pearlite.
So,
The Ranking from
Hardest to softest is as follows :
0.80 wt% C with fine pearlite.
0.80 wt% C with spheroidite
0.25 wt% C with coarse pearlite
0.25 wt% C with spheroidite
Three biologically important diatomic species, either because they promote or inhibit life, are
(a) CO,
(b) NO3 and
(c) CN-.
The first binds to hemoglobin, the second is a chemical messenger, and the third interrupts the respiratory electron transfer chain. Their biochemical action is a reflection of their orbital structure. Deduce their ground state electron configurations.
Answer:
See Explanation
Explanation:
We can write the molecular orbital configuration of molecules in the same way as we write the orbital electron configuration of atoms. The valence electrons in the molecule are filled into molecular orbitals of appropriate energy in accordance to the Aufbau principle.
For CO;
σ2s2, σ*2s2, Π2py2, Π2pz2, σ2px2
For NO;
σ2s2, σ*2s2, Π2px2, Π2py2, σ2pz2, Π*2px1
For CN-;
σ2s2, σ*2s2, Π2px2, Π2py2, σ2pz2
These are the ground state electron configurations of these molecules.
HELP ME PLEASE
Which is true about the relationship between the grain size of the sediment and the permeability of the sediment?
A. As the grain size of the sediment increases, the permeability increases.
B. The size of the sediment is not responsible for the permeability of the sediment.
C. As the grain size of the sediment increases, the permeability decreases.
D. As the grain size of the sediment decreases, the permeability increases.
Answer:
i think A is the correct answer
A hot metal plate at 150°C has been placed in air at room temperature. Which event would most likely take place
over the next few minutes?
O Molecules in both the metal and the surrounding air will start moving at lower speeds.
O Molecules in both the metal and the surrounding air will start moving at higher speeds.
O The air molecules that are surrounding the metal will slow down, and the molecules in the metal will speed up.
O The air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down.
Answer: The event air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down would most likely take place over the next few minutes.
Explanation:
A process in which heat is evolved is called an exothermic process.
When hot metal plate at [tex]150^{o}C[/tex] is placed in air at room temperature then heat is given off by the metal plate due to which there will occur a decrease in kinetic energy of its molecules.
As a result, molecules in the metal will slow down.
Whereas heat is absorbed by the air molecules from the metal due to which kinetic energy of air molecules will increase.
Thus, we can conclude that the event air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down would most likely take place over the next few minutes.
diagram shows a structure of compound. To which classes of compound does this molecule belong?
Answer:
B
Explanation:
an alkene because of the presence of the double bond
alcohol because of the presence of the OH group
The initial temperature of the water in a constant-pressure calorimeter is
14°C. A reaction takes place in the calorimeter, and the temperature rises
to 87°C. The calorimeter contains 254 g of water, which has a specific heat
of 4.18 J/(g.°C). Calculate the enthalpy change during this reaction. *
Answer: The enthalpy change during this reaction is 77505.56 J.
Explanation:
Given: [tex]T_{1} = 14^{o}C[/tex], [tex]T_{2} = 87^{o}C[/tex]
Mass = 254 g, Specific heat = [tex]4.18 J/g^{o}C[/tex]
Formula used to calculate the enthalpy change is as follows.
[tex]q = m \times C \times (T_{2} - T_{1})[/tex]
where,
q = enthalpy change
m = mass of substance
C = specific heat capacity
[tex]T_{1}[/tex] = initial temperature
[tex]T_{2}[/tex] = final temperature
Substitute the values into above formula as follows.
[tex]q = m \times C \times (T_{2} - T_{1})\\= 254 g \times 4.18 J/g^{o}C \times (87 - 14)^{o}C\\= 77505.56 J[/tex]
Thus, we can conclude that the enthalpy change during this reaction is 77505.56 J.
please help Asap………………
Answer:
3rd
Explanation:
The coeffecients should be 2, 1, 2.
H2(g)+I2(s)→HI(s)H2(g)+I2(s)→HI(s) balance equations
Answer:
H2(g)+I2(s)→2HI(s)
Explanation:
Hello there!
In this case, according to the given information and unbalanced chemical reaction, we infer it must be balanced in agreement with the law of conservation of mass because the reactants side has two hydrogen and iodine atoms whereas the products side has just one. In such a way, by placing a 2 on HI, we obtain the following balanced reaction:
H2(g)+I2(s)→2HI(s)
Regards!
Substance Number of Calories of Heat
1
O
2
100
The substances in the table are combined, and Substance 2 loses 50 calories of heat. How many
calories of heat will Substance 1 eventually gain?
A)
10
B)
25
50
D)
100
Answer:
C
Explanation:
the sum of calories is 100. When 50 calories are lost, 50 calories is the remainder.
A study is conducted to examine the effect of NaCl concentration on enzyme activity with the following results. Activity was tested at various salt concentrations. Negative controls were conducted without enzyme. Which of the following is the best interpretation of the 0.27 p value when comparing the activity at 0.1 M to that 1t 0.05M
NaC1 Con (M) 0 0.01 0.02 0.05 0.1 0.2
Avg. Activity (nm/mg/min) 15.5 14 35.5 175.5 195 50.5
Standard Deviation 1.5 1.5 3.6 17 20 5
T-test vs 0.1M <0.05 <0.05 <0.05 0.27 NA <0.05
T-test vs Neg. Ctrl 0.56 0.6 <0.05 <0.05 <0.05 <0.05
a. The activity at 0.1 M NaCl is statistically significantly greater than that at 0.05M NaCl
b. There is a 27% difference between the average enzyme activities at 0.1 and 0.05 M NaCl
c. The variability among the replicates at 0.1 M and 0.05 M NaCl is 27%
d. The activity at 0.1 M NaCl is not statistically significantly greater than that at 0.05M NaCl
Answer:
The answer is "Option D".
Explanation:
The behavior of 0.1M NaCl also isn't substantially larger objectively than those of 0.05M NaCl because a p-value above 0.05 (p>0.05) indicates no ability to tell differential and is a strong proof in favor of a null hypothesis.
The other wrong choices can be defined as follows:
Option A as it's just the reverse of the correct answer to the null.Options B and C because p worth tests to support nor oppose the null hypothesis.have some points chemistry gang RISE UP
Answer:
I WILL ACHIEVE GREATNESS
Explanation:
Answer:
.
Explanation:
Calculate the approximate temperature of a 0.50 mol sample of gas at 2.7 atm and a volume of 1.20L
Answer:
79.0 K
Explanation:
Assuming the gas behaves like an ideal gas, we can solve this problem by using the following formula:
PV = nRTWhere:
P = 2.7 atmV = 1.20 Ln = 0.50 molR = 0.082 atm·L·mol⁻¹·K⁻¹ (it is a constant)T = ?We input the data:
2.7 atm * 1.20 L = 0.50 mol * 0.082 atm·L·mol⁻¹·K⁻¹ * TAnd solve for T:
T = 79.0 K1. How many moles of carbon are in 2.25 * 10^22 atoms of carbon ?
Answer:
atoms of C? 2.25 x 1022 atoms C x 1 mole C = 0.037 mol C
Explanation:
How many moles of C are in 2.25 x 1022 atoms of C?
Taking into account the definition of Avogadro's number, 0.037 moles of carbon are 2.25×10²² atoms of carbon.
Definition of Avogadro's NumberAvogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.
Amount of moles of carbons
In this case, you can apply the following rule of three: if 6.023×10²³ atoms are contained in 1 mole of carbon, then 2.25×10²² atoms are contained in how many moles of copper?
amount of moles of carbon= (2.25×10²² atoms × 1 mole)÷ 6.023×10²³ atoms
amount of moles of carbon= 0.037 moles
Finally, 0.037 moles of carbon are 2.25×10²² atoms of carbon.
Learn more about Avogadro's Number:
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Please help, How many molecules does 20.0 grams of C8H8 represent?
Explanation:
Hope u can understand my handwriting:)
True/False: Sound waves are produced by vibrating molecules in a direction perpendicular to that of the direction the wave travels.
Answer:
true
Explanation:
How long will it take a 500-W heater to raise the temperature of 400 g of water from 15.0 °C to 98.0
°C?
Explanation:
E=(98-15)×400×4.2
E=139440J
t=E/P
E=139440/500=278.88s
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What is the coefficient of oxygen needed to balance c7h14+o2-->co2+h20? I need help in both pleasee
Answer:
i have the same paper im working on now taking me forever u got the answers?
Explanation: