Answer:
False
Explanation:
. What you’re describing is a displacement reaction.
Answer:
False, that is a single replacement reaction that you have described.
Explanation:
how many moles of C8 H18 are present in a 546.23 gram sample?
Answer:
Given:
Compound C8H18
mass of compound- 546.23 gram
To find:
number of moles =?
Solution:
let's find out the molar mass of C8H18= 12×8+18×1 = 114 gram/mole
Number of moles= given mass/molar mass
=546.23/114
= 4.7818436487 moles.
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4. "Metals are conductor of electricity"prove
Answer:
Hey mate.......
Explanation:
This is ur answer......
Metals are an excellent conductor of electricity and heat because the atoms in the metals form a matrix through which outer electrons can move freely. Instead of orbiting their respective atoms, they form a sea of electrons that surround the positive nuclei of the interacting metal ions.
Hope it helps!
mark me brainliest pls......
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A sample of hydrogen gas occupies
1.0 L at 760 torr in a balloon. If the
temperature is kept constant, which
expression represents the volume of
hydrogen gas in liters when the
pressure is raised to 860 torr?
A 860 + 760
B 860 – 760
C 860 / 760
D 760 / 860
When the pressure of a sample of hydrogen gas increases from 760 torr to 860 torr, the expression D 760 / 860 represents the volume of hydrogen gas in liters.
What does Boyle's law state?Boyle's law is a law stating that the pressure of a given mass of an ideal gas is inversely proportional to its volume at a constant temperature.
A sample of hydrogen gas occupies 1.0 L at 760 torr in a balloon. We can calculate the volume when the pressure is increased to 860 torr using Boyle's law.
P₁ × V₁ = P₂ × V₂
V₂ = (P₁/P₂) × V₁
V₂ = (760 torr/860 torr) × 1.0 L = 0.88 L
where,
P₁ and V₁ are the initial pressure and volume.P₂ and V₂ are the final pressure and volume.When the pressure of a sample of hydrogen gas increases from 760 torr to 860 torr, the expression D 760 / 860 represents the volume of hydrogen gas in liters.
Learn more about Boyle's law here: https://brainly.com/question/469270
Calculate the molecular weight of guanylate at pH 7. Show your work. Draw the structures of three different tautomers of hypoxanthine. One of the nonstandard nucleotides that appears moderately often in rRNA and tRNA is dihydrouridine. Which carbon atoms within the uracil moiety of this nucleotide have two hydrogens each attached to them
Answer:
Explanation:
The molecular formula for Guanylate is [tex]\mathbf{C_{10} H_{14} N_5O_8 P}[/tex]
This is calculated by the addition of the atomic weight of all the atoms taking part in the molecule.
i.e. (10 × C) + (14 × H) + (5 × N) + ( 8 × O) + (1 × P)
= (10 × 12) + (14 × 1) + (5 × 14) + ( 8 × 16) + (1 × 30)
= 120 + 14 + 70 + 128 + 30
= 362 g/mol
The diagram for the tautomers of hypoxanthine can be seen in the image attached below.
Dihydrouridine is available and can be seen in tRNAs and rRNAs. It is an exceptionally preserved and adjusted base. It is a pyrimidine nucleoside that is shaped by the expansion of two hydrogen atoms to uridine. By the expansion of two hydrogen atoms to uridine makes it completely soaked and no presence of any two-fold or double bond.
Catalytic reduction of carbon-carbon double bonds in Dihydrouridine synthase occurs at positions 5 and 6 on the uridine base.
Hence, 5 and 6 carbon particles inside the uracil moiety of this nucleotide have two hydrogens each connected to them.
if you understand please help me x
Answer:
1. Percentage yield is 64.75%
2. Atom economy is 48.39%
Explanation:
1. Determination of the percentage yield
Experimental yield = 24.8 g
Theoretical yield = 38.3 g
Percentage yield =?
Percentage yield = Experimental yield /Theoretical yield × 100
Percentage yield = 24.8 / 38.3 × Percentage yield = 2480 / 38.3
Percentage yield = 64.75%
2. Determination of the atom economy.
The balanced equation for the reaction is given below:
6CO₂ + 6H₂O —> C₆H₁₂O₆ + 6O₂
Next, we shall determine the mass of CO₂, H₂O and C₆H₁₂O₆ from the balanced equation.
Molar mass of CO₂ = 12 + (16×2)
= 12 + 32
= 44 g/mol
Mass of CO₂ from the balanced equation = 6 × 44 = 264 g
Molar mass of H₂O = (2×1) + 16
= 2 + 16
= 18 g/mol
Mass of H₂O from balanced equation = 6 × 18 = 108 g
Molar mass of C₆H₁₂O₆ = (6×12) + (12×1) + (6×16)
= 72 + 12 + 96
= 180 g/mol
Mass of C₆H₁₂O₆ from the balanced equation = 1 × 180 = 180 g
Next, we shall determine the total mass of the reactants. This is illustrated below:
Mass of CO₂ = 264 g
Mass of H₂O = 108 g
Total mass of reactants =?
Total mass of reactant = Mass of CO₂ + Mass of H₂O
Total mass of reactant = 264 + 108
Total mass of reactant = 372 g
Finally, we shall determine the atom economy. This can be obtained as follow:
Mass of desire atom (C₆H₁₂O₆) = 180 g
Total mass of reactants = 372 g
Atom economy =.?
Atom economy = mass of desire atom / total mass of reactant × 100
Atom economy = 180/372 × 100
Atom economy = 48.39%
Predict what will be observed in each experiment below. experiment predicted observation.
1. A student sees tiny bubbles clinging to the inside of an unopened plastic bottle full of carbonated soft drink. The student squeezes the bottle.
a. The bubbles will shrink, and some may vanish.
b. The bubbles will grow, and more may appear.
c. The bubbles won't change.
d. I need more information to predict what will happen to the bubbles.
2. A student has two unopened cans containing carbonated water. Can A has been stored in the garage () and can B has been stored in the fridge (). The student opens one can at the time, both cans make a fizz.
a. Can A will make a louder and stronger fizz than can B.
b. Can B will make a louder and stronger fizz than can A.
c. The fizz will be the same for both cans.
d. There is not enough information to predict which can will make the louder fizz.
Answer:
The correct answer is -
1. a) The bubbles will shrink, some may vanish.
2. a) Can A will make a louder and stronger fizz than can B.
Explanation:
In the first question, it is given that the bottle is not opened and therefore, squeezing the bottle filled with a carbonated drink will increase the pressure on the carbonated liquid which forces the bubbles to dissolve or displace or vanish as it moves to empty space.
Thus, the correct answer would be - The bubbles will shrink, some may vanish
In the second question, there are two different conditions for two different unopened cans of carbonated water that are different temperatures one at the garage with higher temperature and one in the fridge at low temperature. As it is known that higher the temperature less will be solubility of gas in liquid so gas in can A will be less soluble which means it has more gas and it will make louder and stronger fizz than B which was stored at low temperature.
thus, the correct answer would be - Can A will make a louder and stronger fizz than can B.
(10pts) Post-Lab Questions Answer the following questions. (2pts) Suppose the concentration of the NaOH solution was 0.5 M instead of 0.1 M. Would this titration have required more, less, or the same amount of NaOH solution for a complete reaction? Choose... (2pts) Suppose you used 0.5 M NaOH to titrate your vinegar sample instead of 0.1 M. What effect does the concentration of base added have on the reliability of the results of your titration? Choose... (2pts) Consider a 0.238 M aqueous solution of sodium hydroxide, NaOH. How many grams of NaOH are dissolved in 23.46 mL? (2pts) How many individual hydroxide ions (OH−) are found in 23.46 mL? (2pts) How many moles of sulfuric acid, H2SO4, are neutralized by 23.46 mL of 0.238 M NaOH(aq)? [Hint: begin by writing a balanced equation for this neutralization reaction.] Total: -/28 pts
Answer:
A) Less amount of NaOH will be required
B) Reliability decreases with increase in concentration of NaOH solution
C) Mass of NaOH = 0.223 g
D) Number of hydroxide ions = 3.36 × 102²¹
E)Moles of H₂SO₄ neutralized = 0.00279 moles of H₂SO₄
Explanation:
A) Since the number of moles of acetic acid in the vinegar sample is constant, the number of moles of NaOH reacting with acetic acid is constant as well.
Volume = number of moles / concentration
Assuming, number of moles = 1, concentration = 0.1 M
Volume = 1/0.1 = 10
With increase in concentration,
Volume = 1/0.5 = 2
Therefore, less amount of NaOH will be required
B) An increase in concentration of base added will results in lesser volume of based used. This will result in an increase in percentage error as well as decrease innthe accuracy of determining the endpoint. Hence, reliability decreases
C) mass = concentration × volume × molar mass
Molar mass of NaOH = 40.0 g, volume of NaOH = 23.46 mL = 0.02346 L, concentration = 0.238 M
Mass of NaOH = 0.238 × 0.02346 × 40
Mass of NaOH = 0.223 g
D) number of moles of NaOH in 0.223 g = 0.233/40 = 0.00558 moles
1 mole of NaOH produces 1 mole of hydroxide ions; 0.00558 moles of NaOH will produce 0.00558 moles of hydroxide ions
Number of hydroxide ions in 0.00558 moles = 0.00558 × 6.02 × 10²³
Number of hydroxide ions = 3.36 × 102²¹
E) H₂SO₄ + 2 NaOH ----> Na₂SO₄ + 2 H₂O
1 mole of H₂SO₄ requires 2 moles of NaOH for complete neutralization
There are 0.00558 moles of NaOH in 23.46 mL of 0.238 M NaOH solution.
Moles of H₂SO₄ required to neutralize 0.00558 moles of NaOH = 0.00558/2
Moles of H₂SO₄ neutralized = 0.00279 moles of H₂SO₄
I bet no one can solve this question......
Answer:
Equilibrium is shifted to left.
Increase in temperature favours the endothermic reaction. In the given reaction, the backward reaction is an endothermic reaction. So the backward reaction is favoured, so the equilibrium shifts towards left.
which statement is true about the reaction shown by this chemical equation HCl + NaOH ------> NaCl + H2O
Answer:
A. It is exothermic
Explanation:
This reaction of acid and base represents synthesis reaction because new subsatnces are produced.
What is synthesis reaction?Synthesis reactions are reactions that occur when two different atoms combines to form a different molecule. A synthesis reaction can be represented by the equation i.e. A + B → C. In this equation, the A and B represent the reactants whereas the C represents the product.
So we can conclude that option C is the correct answer which is the synthesis reaction.
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what is conductor?
give two examples.
Answer:
Conductor is any material tht allows he flow of electrons or electric current . Ex: Metals like iron and copper.
Hope im right!!
Answer:-
Examples of conductors include metals, aqueous solutions of salts (i.e., ionic compounds dissolved in water), graphite, and the human body. Examples of insulators include plastics, Styrofoam, paper, rubber, glass and dry air.When a sample of gas was placed in a sealed container with a volume of 3.35 L and heated to
75°C, the gas vaporized and the resulting pressure inside the container was 17atm. How
many moles of the gas were present?. Single line text.
Answer:
Explanation:What is the demand factor for three commercial ranges?
A machine with three pulleys uses
force to do work than a machine with four pulleys.
more
less
PLEASE ANYONE KNOW IT!!!!!
I think it's ethane. It might be wrong tho.
Translation is the conversion of
1 .RNA to DNA.
2. DNA to RNA.
3. DNA to protein.
4. RNA to protein.
(WILL MARK BRAINLIEST)
Translation is the conversion of RNA to protein. The conversion of RNA to DNA is called reverse transcription.
What do you mean by Proteins?Proteins may be defined as natural-appearing, extremely complex substances that consist of amino acid residues joined by peptide bonds.
The process of translation occurs in the cytoplasm of the cells, while the process of transcription occurs in the nucleus itself.
The conversion of DNA to RNA is called transcription. While the proteins are never directly converted from DNA, it involves both processes of transcription followed by the translation.
Therefore, translation is the conversion of RNA to protein.
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Consider the structures of benzaldehyde and benzyl alcohol. Benzene ring with a CH2OH attached Benzene ring with an aldehyde group attached. These two structures can be distinguished by proton NMR. The hydrogen of the aldehyde group will appear downfield between 9 and 11 ppm and there is Choose... for the alcohol. Also, the methylene hydrogens in the benzyl position of the alcohol will be the only significant Choose... peak between the two structures.
Answer:
no equivalent peak, upfield between 0 and 3 ppm
Explanation:
NMR stands for nuclear magnetic resonance. It is a spectroscopic technique that is used for observing the local magnetic fields around an atomic nuclei. It is used to study the chemical, physical and biological properties of the matter.
In the context, the structures of the benzaldehyde and the benzyl alcohol are distinguished by the proton NMR. The hydrogen atom of aldehyde appears downfield between 9 and 11 ppm and also there is no equivalent peak for the alcohol.
The methylene hydrogens will only be significant upfield between the 0 and 3 ppm peak between the given structures.
why is a saturated solution of magnesium hydroxide less basic than a saturated solution of potassium hydroxide?
A.) magnesium hydroxide is less soluble than potassium hydroxide
B.) magnesium is less basic than potassium
C.) magnesium hydroxide solutions are just as basic as potassium hydroxide solutions
D.) when magnesium hydroxide dissolved the hydroxide ion is partially neutralized
Answer:
letter C I'm not sure to my answer but hope it can hrlp
The reason why magnesium hydroxide is less basic than a saturated solution of potassium hydroxide is that magnesium hydroxide is less soluble than potassium hydroxide.
What is a saturated solution?A saturated solution is one that contains as much solute as it can normally hold at a particular temperature.
We know that magnesium hydroxide is less soluble than potassium hydroxide. Hence, the reason why magnesium hydroxide is less basic than a saturated solution of potassium hydroxide is that magnesium hydroxide is less soluble than potassium hydroxide.
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A sealed 1.0L flask is filled with 0.500 mols of I_2 and 0.500 mols of Br_2. When the container achieves equilibrium the equilibrium constant is 1.10x10^{-2}. What is the equilibrium concentration of the product, IBr?
Answer:
[IBr] = 0.049 M.
Explanation:
Hello there!
In this case, according to the balanced chemical reaction:
[tex]I_2+Br_2\rightarrow 2IBr[/tex]
It is possible to set up the following equilibrium expression:
[tex]K=\frac{[IBr]^2}{[I_2][Br_2]} =0.0110[/tex]
Whereas the the initial concentrations of both iodine and bromine are 0.50 M; and in terms of [tex]x[/tex] (reaction extent) would be:
[tex]0.0110=\frac{(2x)^2}{(0.50-x)^2}[/tex]
Which can be solved for [tex]x[/tex] to obtain two possible results:
[tex]x_1=-0.0277M\\\\x_2=0.0245M[/tex]
Whereas the correct result is 0.0245 M since negative results does not make any sense. Thus, the concentration of the product turns out:
[tex][IBr]=2x=2*0.0249M=0.049M[/tex]
Regards!
The nucleus contains:
protons and electrons
protons and neutrons
electrons
protons, neutron, and electons
Explanation:
protons, neutrons and electrons
Answer:
An atom contains protons, neutrons and electrons BUT A NUCLEUS CONTAINS PROTONS AND NEUTRONS ONLY.
Moby eats three-sixths of a pizza. Which fraction is equivalent to three-sixths?
Answer:
1/2
Explanation:
Half of 6 is 3 so therefore it is a half.
the work is in the photo can i get answers please (;´༎ຶٹ༎ຶ`)
Answer:
yes
Explanation:
it is
200.0 mL of a 0.600 M solution of KCl is diluted to 600.0 mL. What is
the new concentration of the solution?
Answer:
0.200 M
Explanation:
Begin by finding how many moles of KCl there are by using the molarity and given volume:
[tex]\frac{0.600 mol}{1000 mL} x \frac{200.0 mL}{1} = 0.12 mol KCl[/tex]
(Remember that molarity is mol/L, which is equal to mol/1000 mL.)
Next, divide the moles of KCl by the new volume (after dilution):
[tex]\frac{0.12 mol KCl}{600.0 mL} x \frac{1000 mL}{1 L} = \frac{0.200 mol KCl}{1 L} = 0.200 M[/tex]
The new concentration is 0.200 M.
The new concentration of the KCL solution is 0.200M
HOW TO CALCULATE CONCENTRATION:
The concentration or molarity in mol/L or M of a solution can be calculated using the following formula:C1V1 = C2V2
Where;
C1 = initial concentration of the solution
C2 = final concentration of the solution
V1 = initial volume of the solution
V2 = final volume of the solution
According to the information given in this question, we have the following:V1 = 200mL
V2 = 600mL
C1 = 0.600 M
C2 = ?
C2 = C1V1 ÷ V2
C2 = (0.600 × 200) ÷ 600
C2 = 120 ÷ 600
C2 = 0.2M
Therefore, the new concentration of the KCL solution is 0.200M.Learn more: https://brainly.com/question/4401006?referrer=searchResults
Identify the three basic ingredients used in glass and give an example of each
Answer:
Sand (SiO2 silica) In its pure form it exists as a polymer, (SiO2)n.
Soda ash (sodium carbonate Na2CO3) ...
Limestone (calcium carbonate or CaCo3) or dolomite (MgCO3)
Explanation:
I am pretty sure you know what sand is, Soda ash is a fine white colored powder that is extracted from the ashes of plants growing in sodium rich soils. Limestone is is a common type of carbonate sedimentary rock.
The mass of a brick is 5 grams. If the brick is smashed into little pieces, the total mass of all the pieces will be
5 grams
o less than 5 grams
O more than 5 grams
What will the mass be if the brick was smashed
Answer:
I am not sure but i think it is 5 grams
Explanation:
because the total mass= 5g
so it is a physical change so no new substance is formed
so the total mass = total mass of all the broken pieces
seven carbon chain with CH3 attached to second and third carbon
Answer:
2,3-dimethylheptane.
CH₃ - CH - CH-CH₂-CH₂-CH₂-CH₂
| |
CH₃ CH₃
Explanation:
Hello there!
In this case, according to the given instructions, it is possible to draw the organic chemical structure by connecting seven carbon atoms along the parent chain with two methyl substituents at the second and third carbon atoms; thus, the resulting structure is:
CH₃ - CH - CH-CH₂-CH₂-CH₂-CH₂
| |
CH₃ CH₃
Furthermore, the name would be 2,3-dimethylheptane according to the IUPAC rules for nomenclature.
Best regards!
What is the total number of molecules of hydrogen in 0.25 mole of hydrogen?
1
6.0 10^23
2.
4.5 * 10^23
3
3.0 x 10^23
4
1.5 * 10^23
0.25 mole of hydrogen contains 1.5 * 10^23 molecules of hydrogen gas.
We have to know that the number of molecules in one mole of a substance is obtained from the Avogadro's number.
We know that;
1 mole of hydrogen contains 6.02 × 10^23 molecules of hydrogen
0.25 mole of hydrogen contains 0.25 mole × 6.02 × 10^23 molecules/1 mole
= 1.5 * 10^23 molecules
Therefore, 0.25 mole of hydrogen contains 1.5 * 10^23 molecules of hydrogen gas.
Learn more about Avogadro's number: https://brainly.com/question/1445383
Help please thank you
Answer:
It’s probably plants seed and raise crops for their food
Explanation:
Answer:
I would say b
Explanation:
A hunter would go out to hunt and gathers handle crops or find crops so b.
Solutions, _____ colloids, _____ light.
a) like, will not scatter
b) unlike, will not scatter
c) like, will scatter
d) unlike, will scatter
Answer: unlike, will not scatter
Explanation:
Colloids are unlike solutions because their dispersed particles are much larger than those of a solution. The dispersed particles of a colloid cannot be separated by filtration, but they scatter light, a phenomenon called the Tyndall effect.
how many mole of diphosphorus pentoxide are represented by 2.63×10²⁶ molecules
Answer:
436.88 moles of P₄O₁₀
Explanation:
From the question given above, the following data were obtained:
Number of molecules of P₄O₁₀ = 2.63×10²⁶ molecules
Number of mole of P₄O₁₀ =?
From Avogadro's hypothesis,
6.02×10²³ molecules = 1 mole of P₄O₁₀
Therefore,
2.63×10²⁶ molecules = 2.63×10²⁶/6.02×10²³
2.63×10²⁶ molecules = 436.88 moles of P₄O₁₀
Thus, 436.88 moles of P₄O₁₀ are present in 2.63×10²⁶ molecules.
Please help due soon.
Answer:
water - Yes because the do drink water
Air - yes they need to breath or alse they would not do good
warmth - yes or they die from coldness
Light - yes to get there food
soil - yes nution for there roots
Explanation:
Hopes it helps
The value of Avogadro number is