Since the ethanol has a density of 0.800 g/mL, the mass of the ethanol is 180 grams.
Given the following data:
Volume of ethanol = 225 mLDensity of lead ball = 0.800 g/mL.To find the mass of the ethanol;
Density can be defined as mass all over the volume of an object.
Mathematically, the density of a substance is given by the formula;
[tex]Density = \frac{Mass}{Volume}[/tex]
Making mass the subject of formula, we have;
[tex]Mass = Density \times Volume[/tex]
Substituting the given parameters into the formula, we have;
Mass of ethanol = 180 grams.
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What would you name this molecule?
Answer:
H2O is the name of this molecule and it is water
In the preparation of a certain alkyl halide, 10 g of sodium bromide (NaBr), 10 mL distilled water (H20), and 9 mL 3-methyl-1-butanol (C5H120) were mixed in the round-bottomed flask and allowed to cool for 2 -3 minutes. Then while swirling the flask, 10 mL sulfuric acid (H2SO4) was slowly added to the flask and the mixture was refluxed and later distilled. The mass of the pure product obtained was 6.48 g. Sodium hydrogen carbonate (NaHCO3) was used to remove impurities. (Density of 3-methyl-1-butanol is 0.810 g/mL). The percentage yield will be?
Percentage yield shows the amount of reactants converted into products. The percentage yield of the reaction is 51.7%.
The equation of the reaction is sown in the image attached. The reaction is 1:1 as we can see.
Number of moles of NaBr = 10 g/103 g/mol = 0.097 moles
We can obtain the mass of 3-methyl-1-butanol from its density.
Mass = density × volume
Density of 3-methyl-1-butanol = 0.810 g/mL
Volume of 3-methyl-1-butanol = 9 mL
Mass of 3-methyl-1-butanol = 0.810 g/mL × 9 mL
Mass of 3-methyl-1-butanol = 7.29 g
Number of moles of 3-methyl-1-butanol = mass/molar mass = 7.29 g/88 g/mol = 0.083 moles
Since the reaction is 1:1 then the limiting reagent is 3-methyl-1-butanol
Mass of product 1-bromo-3-methylbutane = number of moles × molar mass
Molar mass of 1-bromo-3-methylbutane = 151 g/mol
Mass of product 1-bromo-3-methylbutane = 0.083 moles × 151 g/mol
= 12.53 g
Recall that % yield = actual yield/theoretical yield × 100
Actual yield of product = 6.48 g
Theoretical yield = 12.53 g
% yield = 6.48 g/12.53 g × 100
% yield = 51.7%
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Synthetic reactions in Citric Acid Cycle
★ « Synthetic reactions in Citric Acid Cycle » ★
The overall reaction for the citric acid cycle is as follows: acetyl-CoA + 3 NAD+ + FAD + GDP + P + 2H2O = CoA-SH + 3NADH + FADH2 + 3H+ + GTP + 2CO2. Many molecules in the citric acid cycle serve as key precursors for other molecules needed by cells.hope it is
1. ¿Cuál de los factores se deben emplear para convertir: a. ¿Número de moles de cloro en número de moles de NaCl? b. Moles de sodio a moles de cloro C. Moles de cloro a moles de sodio. 2 Na + CI, - 2 Naci
Ayudaaa
Answer:
Número de moles de cloro en número de moles de NaCl
Explanation:
espero que si sea la correcta
Increasing the frequency _________________ the wavelength. Group of answer choices decreases increases does not change
Answer:
heightens
Explanation:
Please tell me an example of a protein structure that would give positive test with Molisch’s Reagent?
Answer:
positive reaction for Molisch's test is given by almost all carbohydrates (exceptions include tetroses & trioses). It can be noted that even some glycoproteins and nucleic acids give positive results for this test (since they tend to undergo hydrolysis when exposed to strong mineral acids and form monosaccharides).
Answer:
glycoproteins
Explanation:
A positive reaction for Molisch's test is given by almost all carbohydrates (exceptions include tetroses & trioses). It can be noted that even some glycoproteins and nucleic acids give positive results for this test (since they tend to undergo hydrolysis when exposed to strong mineral acids and form monosaccharides).
The green light emitted by a stoplight has a wavelength of 505 nm. What is the frequency of this photon? (c = 3.00 × 10⁸ m/s).
Answer:
5.9405*10^14 Hz
Explanation:
Remember the equation c=v*λ
v=frequency
λ=wavelength
By manipulating the equation, we can get it in terms of frequency:
c/λ=v
Now convert wavelength to meters (1nm=m*10^-9)
5.05*10^-7m (2 decimal places were shifted to make the number between 1-10, hence the -7 exponent)
Use the manipulated equation:
(3.00*10^8)/(5.05*10^-7), which yields:
5.9405*10^14 Hz (or s^-1)
The frequency of the photon will be "[tex]5.9405\times 10^{14} \ Hz[/tex]".
According to the question,
Wavelength,
[tex]\lambda = 505 \ nm[/tex]or,
[tex]= 5.05\times 10^{-7} \ m[/tex]
As we know the equation,
→ [tex]c = v\times \lambda[/tex]
or,
→ [tex]v = \frac{c}{\lambda}[/tex]
By putting the values, we get
[tex]= \frac{3.00\times 10^8}{5.05\times 10^{-7}}[/tex]
[tex]= 5.9405\times 10^{14} \ Hz[/tex]
Thus the above answer is right.
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What is this atom structure?
Explain the process of ionization in at least 1 paragraph.
Brainliest goes to best explanation!
Explanation:
Ionization is the process by which ions are formed by gain or loss of an electron from an atom or molecule. If an atom or molecule gains an electron, it becomes negatively charged (an anion), and if it loses an electron, it becomes positively charged (a cation). Energy may be lost or gained in the formation of an ion.
what is an ion?what are the two ways to which an ion can be made?
Answer:
please give me brainlist and follow
Explanation:
ion
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Chemistry
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physics
BY The Editors of Encyclopaedia Britannica | View Edit History
ion, any atom or group of atoms that bears one or more positive or negative electrical charges. Positively charged ions are called cations; negatively charged ions, anions. Ions are formed by the addition of electrons to, or the removal of electrons from, neutral atoms or molecules or other ions; by combination of ions with other particles; or by rupture of a covalent bond between two atoms in such a way that both of the electrons of the bond are left in association with one of the formerly bonded atoms. Examples of these processes include the reaction of a sodium atom with a chlorine atom to form a sodium cation and a chloride anion; the addition of a hydrogen cation to an ammonia molecule to form an ammonium cation; and the dissociation of a water molecule to form a hydrogen cation and a hydroxide anion.
Tin has the atomic number Sn (Z = 50).
(a). Give its electronic structure
(b). Is it one of the transition metals?
(c). Knowing that it loses its electrons in pairs and that the 4d subshell is not affected. What are the possible degrees of oxidation for this element?
Tin has electron configuration [Kr] 5s²4d¹⁰5p² and it is not a transition element because its outermost orbitals are 5s² 5p². It has oxidation states of +2 and +4.
The electron configuration of tin is [Kr] 5s²4d¹⁰5p². The electronic structure of an atom shows the arrangement of electrons in the atom of an element. The electrons are arranged in sub-shells.
Tin is not a transition metal because it has a completely filled d sub-shell and its outermost shell consists of ns, np orbitals.
Tin looses its electrons in pairs. Remember that the outermost orbitals are 5s² 5p². This means that tin can have two stable oxidation states, +2 and +4.
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helpppppppppppppppppppppppppp
Answer:
B
Explanation:
Answer:
B
Explanation:
U can read the second part
According to the periodic table, which two elements have an atomic mass less than twice their atomic number?
Answer:
Hydrogen and oxygen
Explanation:
Hydrogen
2 × atomic number = 2
atomic mass = 1.008 amu
Oxygen
2 × atomic number = 16
atomic mass = 15.999 amu
How many hydrogen atom are in compound NH42CO3
Answer:
There are 4 Hydrogen atoms in the compound NH42CO3
Explanation:
The "H4" is used to represent the amount of Hydrogen atoms in the compound itself, which is 4.
How many mm Hg are there in 2.27 atm?
Answer:
[tex]\huge\boxed{\sf 2.27\ atm = 1,725\ mm\ of\ Hg}[/tex]
Explanation:
We know that:
1 atm = 760 mm of Hg (Standardly)
Multiply both sides by 2.27
2.27 atm = 760 * 2.27 mm of Hg
2.27 atm = 1,725 mm of Hg
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807Describe how you would separate rock salt to obtain salt crystals and pure dry sand.
what is the formula for tetraaquaoxalatoiron(III)sulphate
Answer:
Fe2(SO4)3(H2O)n
Explanation:
Answer:
sorry I couldn't understand the question
A car slows to a velocity of 20 m/s and weighs 20 kg. Does the car have momentum? If so, what is the momentum of the car?
Answer:400
Explanation:
20x20
P(momentum)= mxv
Mass times velocity = momentum
4. Some biologists declare "structure determines functions." The 3-D molecular geometry in small molecules (or units of molecules) are critical in the final shape of larger structures. Give an example, not found in your notes or textbook that illustrate how a change a final shape can affect how the structure functions (or how other substances interact with it) and explain your choice.
.. How many seconds will it take for a satellite to travel 650 km at a rate of 220 m/s?
Answer: 3750s Happy To Help
Explanation:
helppppppppppppppppppppppppppp
Answer:
It's also true
Explanation:
the answer is written in this question
I hope that helps
Que son Moléculas neutras
Answer:
Una molecula en que hay igual numero de cargas positivas y negativas y los electrones estan distribuidos de modo que no hay regiones con carga parcial(o sea una molecula no polar). Esto ocurre cuand los atomos tienen mas o menos igual electronegatividad para atraer los electrones.
Explanation:
Identify the functional groups present in each molecule.
A 19-carbon compound is composed of one five-membered ring and three six-membered rings.
Carbon 3 is double bonded to an oxygen and attached to carbon 2 and carbon 4.
Carbon 17 is attached to an oxygen, which is attached to a hydrogen.
i. hydroxyl group
ii. carboxyl group
iii. carbonyl group
A central carbon is attached to an amine, two hydrogens, and a carbon that is double bonded to an oxygen and single bonded to an oxygen attached to a hydrogen.
i. amino group
ii. carboxyl group
iii. amide group
Answer:
Carbon 3 is double bonded to an oxygen and attached to carbon 2 and carbon 4. :
Answer: Carbonyl group ( Ketone or aldehyde)
Carbon 17 is attached to an oxygen, which is attached to a hydrogen. :
Answer: Carboxyl group (Carboxylic acid)
A central carbon is attached to an amine, two hydrogens, and a carbon that is double bonded to an oxygen and single bonded to an oxygen attached to a hydrogen. :
Answer: Amide group
An amide group contains both amine and carboxyl
[tex].[/tex]
how many grams of hydrogen in 1.85moles
Part D
Based on the activity series you created in part C, predict whether there would be a chemical reaction or no
reaction when the listed pairs of substances are combined.
Answer:
magnesium and copper(II) sulfate no reaction
iron and magnesium sulfate reaction
copper and iron(III) nitrate reaction
magnesium and hydrochloric acid reaction
Explanation:
On vacation, Aria went scuba diving in the Pacific Ocean for the very first time. She rose toward the surface of the water at a steady speed for 4 minutes. She rose 36 meters in that time. What was her speed? HELP ME ASAP!!!!!!!!!!!!!
Aria speed during scuba diving was 0.15 m/s.
Speed is the ratio of the distance travelled to the time taken. Speed is given by:
Speed = distance / time
Given that the distance travelled was 36 meters and the time was 4 minutes, hence:
Time = 4 minutes × 60 seconds per minute = 240 seconds
Speed = 36 m / 240 s
Speed = 0.15 m/s
Therefore Aria speed during scuba diving was 0.15 m/s.
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HELPPPPPPPP i need help!!!!!!!!!!!!!
Answer:
C!
Explanation:
when water is boiling the water particles will give each other more space and will then be turned into a gas :)
Biểu thức định luật Raoul là?
Answer: Định luật Raoult là một định luật hóa học vật lý, với ý nghĩa trong nhiệt động lực học. Được thành lập bởi nhà hóa học người Pháp François-Marie Raoult vào năm 1887, nó nói rằng áp suất một phần của mỗi thành phần của một hỗn hợp chất lỏng lý tưởng bằng với áp suất hơi của thành phần tinh khiết nhân với phần nốt ruồi của nó trong hỗn hợp. Kết quả là, việc giảm áp suất hơi tương đối của dung dịch pha loãng của chất tan không lây bằng với phần nốt ruồi của chất tan trong dung dịch.
Explanation: hope this helps :)
What Group is this atom located use a number only
*
Covert 645g of CuCl2 to mole
Answer:
kombinasi kuda-kuda belakang
Explanation:
maaf kalau salahnya