Answers
Related Questions
What mass of NaOH is needed to make 500mL of 4M solution
Answers
Answer:
80.0 grams NaOH
Explanation:
500 mL = 0.500 L
M = moles / liters
4 M = x moles / 0.500 L
Multiply both sides by 0.500 L
2 moles = x
Convert moles to grams
2 moles NaOH x (39.998 grams NaOH / 1 mole) = 80.0 grams NaOH
Select the correct structure that
corresponds to the name.
3-bromo-6-methyl-4-octene
CHE
A
Br
B.
CH3CH2CHBrCH = CHCH(CH3)CH2CH3
C. both
Someone please help
Answers
Answer:
b
Explanation:
one clue is the double bond at 4 carbon c=c
The correct structure that corresponds to the name.
3-bromo-6-methyl-4-octene is \($\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CHBrCH}=\mathrm{CHCH}\left(\mathrm{CH}_{3}\right) \mathrm{CH}_{2} \mathrm{CH}_{3}$\) .
What is 3-bromo-6-methyl-4-octene?The molecule in which bromine is attached with C-3 carbon and double present at C-4 carbon containing total number of 8 carbon atom can be considered as 3-bromo-6-methyl-4-octene.
What is structure?
A chemist specifies the molecular geometry and, where possible and required, the electronic structure of such given molecule as well as other solid during a chemical structure determination.
It can be seen that in molecule \($\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CHBrCH}=\mathrm{CHCH}\left(\mathrm{CH}_{3}\right) \mathrm{CH}_{2} \mathrm{CH}_{3}$\) bromine is attached with C-3 carbona and double bond exist at C-4 carbon. the total number of carbon atom is 8.
therefore, the structure of the compound will be \($\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CHBrCH}=\mathrm{CHCH}\left(\mathrm{CH}_{3}\right) \mathrm{CH}_{2} \mathrm{CH}_{3}$\).
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Drag force is directly proportional to ______. velocity. thrust shorter and faster blades longer and slower blades
Answers
Answer:
Drag force is directly proportional to squared velocity
Explanation:
googl e
If water rises in the ocean, what must be true of that water? \_—_—_/
Answers
Answer:
Consequences. When sea levels rise as rapidly as they have been, even a small increase can have devastating effects on coastal habitats farther inland, it can cause destructive erosion, wetland flooding, aquifer and agricultural soil contamination with salt, and lost habitat for fish, birds, and plants.
calculate the volume i liters of a 3.48g/dl potassium iodide solution that contains 341.g of potassium iodide (KI) round your answer to 3 significant figures
Answers
Answer:
\(V=980L\)
Explanation:
Hello,
In this case, we have a concentration that is per unit of deciliters, therefore, we need to convert it to litre basis:
\(3.48\frac{g}{dL} *\frac{1L}{10dL}=0.348\frac{g}{L}\)
Then, to compute the volume we use the given mass to obtain:
\(V=\frac{341g}{0.348g/L}\\ \\V=980L\)
Best regards.
Which part of the brain is affected by a smell, a song, or a photograph?
A. the primitive brain
B. the right brain
C. the outer brain
D. the emotional brain
Answers
The right brain part of the brain is affected by a smell, a song, or a photograph.
What is Right Brain?The right brain is more intuitive and visually oriented. It is occasionally referred to as the analog brain. It thinks less logically and with more creativity. According to out-of-date research by Sperry, the right brain aids in creativity.
Which part of brain deals with photograph?Posterior parietal cortex of the parietal lobe of the brain mainly deals with the photographs.
Which part of brain deals with Smell?The olfactory bulb, a structure in the front of the brain, processes smells before sending data to other regions of the body's central nervous system.
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The right brain part of the brain is affected by a smell, a song, or a photograph.
What is Right Brain?
The right brain is more intuitive and visually oriented. It is occasionally referred to as the analog brain. It thinks less logically and with more creativity. According to out-of-date research by Sperry, the right brain aids in creativity.
Which part of brain deals with photograph?
Posterior parietal cortex of the parietal lobe of the brain mainly deals with the photographs.
Which part of brain deals with Smell?
The olfactory bulb, a structure in the front of the brain, processes smells before sending data to other regions of the body's central nervous system.
A chemical reaction that has the general formula of AB->A + B is best classified as a (blank) reaction.
synthesis
polymerization
decomposition
oxidation
replacement
What is the blank?
Answers
Answer: Decomposition
Explanation:
Synthesis reaction is a type of chemical reaction in which two reactants combine to give a single product.
Polymerization is a reaction where small units called as monomers joine together to form a large molecule called as polymer.
A decomposition reaction occurs when one reactant breaks down into two or more products. This can be represented by the general equation: AB → A + B.
Oxidation is a reaction where a substance loses electrons and undergo an increase in oxidation state.
Replacement reaction is a type of chemical reaction in which more reactive element displaces the less reactive element from its salt solution.
how would you confirm the presence of lead in an ore?
Answers
There are numerous ways to determine whether lead is present in an ore. Atomic absorption spectroscopy is a popular approach. With this method, an ore sample is dissolved in acid and then atomized in a flame or plasma.
The sample's atoms will absorb light at particular wavelengths that are peculiar to the element under investigation. The amount of light absorbed can be used to calculate how much lead is present in the sample. Inductively coupled plasma mass spectrometry and X-ray fluorescence spectroscopy are further techniques. It is crucial to remember that these procedures call for specialized tools and training, thus they ought to only be carried out in a lab by qualified experts.
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What is the median reaction of second end point in HCL and NaOH titration
Answers
The median reaction at the second end point in the HCl and NaOH titration is: HCl + NaOH → NaCl + H2O
In a titration between hydrochloric acid (HCl) and sodium hydroxide (NaOH), the reaction involved is the neutralization reaction between an acid and a base. The balanced equation for this reaction is:
HCl + NaOH → NaCl + H2O
In this reaction, one mole of HCl reacts with one mole of NaOH to form one mole of NaCl (sodium chloride) and one mole of water.
During the titration process, the reaction occurs gradually as the base is added to the acid solution.
The first end point of the titration is reached when the moles of HCl and NaOH are stoichiometrically equivalent, meaning they react in a 1:1 ratio. At this point, all the HCl has been neutralized by the NaOH, and no excess of either reagent remains.
However, if the titration is continued beyond the first end point, the reaction between HCl and NaOH can still occur, albeit in a different ratio.
The second end point refers to the point where the moles of NaOH added exceed the stoichiometrically required amount to neutralize the HCl completely. As a result, any excess NaOH added after the second end point reacts with the excess HCl in a 1:1 ratio.
Therefore, the median reaction at the second end point in the HCl and NaOH titration is:
HCl + NaOH → NaCl + H2O
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Identify acceptable names for the molecule. A benzene ring with two bromine atoms attached at different sites of the ring, so that either three carbon atoms or one carbon atom separate them, depending on the direction from which you count from a bromine atom.
Answers
Answer:
1,3-dibromobenzene
Explanation:
An image of the compound described in the question is attached to this answer.
We need to reiterate here the rules of IUPAC nomenclature. The substituents in a compound must be named in such a way that they have the lowest number.
The compound described may also be named as 1,5-dibromobenzene but this name is disallowed because it gives the substituents a higher number than 1,3-dibromobenzene.
Which of the following pairs of solutions produces a precipitate when combined?
Cu(NO3)2 and NaCl
Cu(NO3)2 and K2CO3
CaCl2 and NaNO3
Fe(NO3)3 and MgCl2
Answers
The pairs of solutions that produces a precipitate when combined are \(Cu(NO_{3})_{2}\) and \(K_{2} CO_{3}\)3. So the correct option is B.
What is a precipitate?A precipitate is a solid that is created from a solution in an aqueous state in which two chemicals react. The precipitate then, once formed, will remain floating in solution. If you intervene in the process by putting the solution in a centrifuge, it will press the mass to the bottom of the tube, generating a compact mass.
The generation of the precipitate can be generated only if the characteristics of the compounds will overcome the solubility that it has to be able to generate a reaction.
All this will be generated because in the solution there will be components which will generate a chemical reaction between two ionic compounds. For this reason, the correct option will be B. \(Cu (NO_{3}) _{2}\) and \(K_{2} CO_{3}\).
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Calculate the number of gold atoms in a 80.0 g sample of gold (III) chloride (Au2CI6)Be sure your answer has a unit symbol if necessary, and rounded to 3 significant digits
Answers
The number of gold atoms is 1.590x10^23.
- First, with the molar mass of Au2Cl6 (607g/mol) we can find the grams of Au in 80g of Au2Cl6:
\(\begin{gathered} 607g\text{ of Au2Cl6 \_\_\_\_\_\_ 394g of Au} \\ 80g\text{ of Au2Cl6 \_\_\_\_\_\_ x= }\frac{80g.394g}{607g} \\ x=\text{ 51.93g} \end{gathered}\)Now we know that there are 51.93g of Au in 80g of Au2Cl6.
- Second, with the molar mass of gold (197g/mol) we can calculate the number of moles in 51.93g of gold:
\(\begin{gathered} 197g\text{ \_\_\_\_\_ 1mol} \\ 51.93g\text{ \_\_\_\_ x= }\frac{51.93g.1mol}{197g} \\ x=0.264\text{mol} \end{gathered}\)Now we know that there are 0.264 moles of gold in the sample.
- Third, with the Avogadro's number (6.022*10^23) we can calculate the number of gold atoms in the sample:
\(\frac{0.264mol.\mleft(6.022x10^{23}\mright)}{1\text{mol}}=1.590x10^{23}\)So, the number of gold atoms is 1.590x10^23.
Suppose certain sample takes 100 min for 750 mL water to percolate into the
soil. Calculate the rate of percolation of water.
Answers
The rate of percolation of water into the soil will be 0.125 mL per second
Percolation rateThe rate of percolation of water into the soil is determined by the volume of water that enters the soil per unit of time under specific conditions.
In this case, 750 mL of water percolated in 100 minutes.
100 minutes = 100 x 60 = 6,000 seconds
Percolation rate = 750/6000 = 0.125 mL per second
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Match the label to the correct description.
Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse.
ball-and-stick model advantage
ball-and-stick model disadvantage
space-filling model advantage
space-filling model disadvantage
Answers
We can see here that matching the label to the correct description, we will have to have a complete part of the description and have a full understanding of what ball-and-stick model is all about.
A specific kind of molecular model called the ball-and-stick model uses balls to represent atoms and sticks to represent the connections connecting them to depict the three-dimensional structure of molecules.
It is a physical model that enables researchers to see the configuration of atoms within a molecule and comprehend their interrelationships.
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RAOULT'S LAW
1- The vapor pressure of water at 25° C is 23.8 torr. What is the vapor
pressure at 25° C of a 20% aqueous solution of a non-electrolyte with a
molar mass of 121.3?
Answers
Answer:
23.4 torr
Explanation:
For solutions that contain non-volatile solutes, the vapor pressure of the solution can be determined by using the mole fraction of the solvent and the vapor pressure of the pure solvent at the same temperature.
P
sol
=
χ
solvent
⋅
P
∘
solvent
, where
P
sol
is the vapor pressure of the solution
χ
solvent
is the mole fraction of the solvent
P
∘
solvent
is the vapor pressure of the pure solvent
In your case, you know that the vapor pressure of pure water at
25
∘
C
is equal to
23.8
torr. This means that all you have to do is determine the mole fraction of water in the solution.
As you know, mole fraction is defined as the number of moles of a component of a solution divided by the total number of moles present in that solution.
Use glucose and water's respective molar masses to determine how many moles of each you have
18.0
g
⋅
1 mole glucose
180.0
g
=
0.100 moles glucose
and
95.0
g
⋅
1 mole water
18.015
g
=
5.273 moles water
The total number of moles present in the solution will be
n
total
=
n
glucose
+
n
water
n
total
=
0.100
+
5.273
=
5.373 moles
This means that the mole fraction of water will be
χ
water
=
5.273
moles
5.373
moles
=
0.9814
Finally, the vapor pressure of the solution will be
P
sol
=
0.9814
⋅
23.8 torr
=
23.4 torr
The answer is rounded to three sig figs.
Why is the classification species not considered a group? (1 point)
O Each species is a separate type of organism.
O Each species is an individual organism.
O Each species lacks the characteristics of the levels above.
O Each species shares characteristics with other species.
Answers
Each species is a separate type of organism.
A species is a group of creatures that share similar traits. The same species of organisms are capable of sexual reproduction as well as interbreeding and producing fertile offspring. It is a fundamental unit of taxonomy and classification.The system is divided into seven categories: Kingdom, Phylum or Division, Class, Order, Family, Genus, and Species. Kingdom is the most inclusive category.In a group, many types of an organism can be included even if they do not share the same traits. But species is a group of organisms that share similar traits.For example, human beings are species as they are all alike in physical features, way of reproduction, etc. But the animal is considered a group because it included a variety of living beings.Therefore, Each species is not considered a group.
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Which species has 54 electrons
Answers
Answer: Neutral Xe atom
Of the following, which is a triprotic acid?
Select the correct answer below:
HPO2−4
H2PO−4
H3PO4
None of the above
Answers
The correct answer is \(H_{3}PO_{4}\), which is a triprotic acid .
A triprotic acid is a type of acid that can donate three protons or hydrogen ions per molecule. These acids have three ionizable hydrogen atoms or three acidic hydrogens. The term "triprotic" means "three acidic hydrogens." Examples of triprotic acids. Triprotic acids include phosphoric acid (\(H_{3}PO_{4}\)), citric acid (\(C_{6} H_{8} O_{7}\)), and tribasic ammonium phosphate (\([NH_{4}]3PO_{4}\)).Phosphoric acid, \(H_{3}PO_{4}\), is a triprotic acid.
It has three ionizable hydrogens, and it can lose them one at a time in a stepwise fashion to form different species,\(H_{2}PO_{4}\)-, \(HPO_{4}\)3-, and \(PO_{4} 3\)-. The ionization constants of the acid, called Ka1, Ka2, and Ka3, correspond to each of the three proton transfer steps. Thusthe overall acidity of the acid depends on the relative magnitudes of each of these constants.The correct answer is \(H_{3}PO_{4}\).
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The standard heat of combustion is shown in the following chemical equation CgH 20 (g) + 140 2(g) 9CO 2(g) + 10H 2 o (1) delta
Answers
The given question is incomplete. The complete question is:
The standard heat of combustion is shown in the following chemical equation \(C_9H_{20}(g)+14O_2(g)\rightarrow 9CO_2(g)+10H_2O\)\(\Delta H_{rxn}=-6125.21kJ/mol\). If 130 g of nonane combusts , how much heat is released?
Answer: 6211.21 kJ
Explanation:
Heat of combustion is the amount of heat released on complete combustion of 1 mole of substance.
Given :
Amount of heat released on combustion of 1 mole of nonane = 6125.21 kJ
According to avogadro's law, 1 mole of every substance occupies 22.4 L at NTP, weighs equal to the molecular mass and contains avogadro's number \(6.023\times 10^{23}\) of particles.
1 mole of nonane \((C_9H_{20})\) weighs = 128.2 g
Thus we can say:
128.2 g of nonane on combustion releases = 6125.21 kJ
Thus 130 g of \(C_4H_{10}\) on combustion releases =\(\frac{6125.21}{128.2}\times 130=6211.21kJ\)
Thus the heat of combustion of 130 g of nonane is 6211.21 kJ
red litmus paper was used to test toothpaste and it turns blue.Explain what this tells about the toothpaste
Answers
When the molecular reaction is correctly balanced, what is the stoichiometric coefficient for potassium nitrate?
Co(NO3)3 + K2S --->
Answers
The balanced equation for the reaction between cobalt(III) nitrate (\(Co(NO_3)_3\)) and potassium sulfide (\(K_2S\)) is:
\(3 Co(NO_3)3 + 2 K_2S - > 3 CoS + 6 KNO_3\)
In the balanced equation, the stoichiometric coefficient for potassium nitrate (\(KNO_3\)) is 6.
A molecular reaction is a chemical reaction in which two or more molecules combine to form a new compound. Molecular reactions include a wide range of natural and synthetic phenomena, ranging from enzyme-catalyzed transformations to protein folding and drug binding. In a chemical equation, stoichiometric coefficients reflect the relative number of molecules of each reactant and product.
Potassium nitrate is a chemical compound that is commonly used in fertilizers, fireworks, and rocket propellants. It is an ionic salt with the formula \(KNO_3\). Potassium nitrate is a white crystalline substance that is soluble in water. It is also known as saltpeter.What is the balanced chemical equation for the reaction of potassium nitrate and potassium sulfide?\(Co(NO_3)_3 + K_2S → CoS + 3KNO_3\)
This is the balanced chemical equation for the reaction of potassium nitrate and potassium sulfide. The stoichiometric coefficient for potassium nitrate is 3, which means that three molecules of KNO3 are required to react with one molecule of \(K_2S\). On the other hand, the stoichiometric coefficient for \(Co(NO_3)_3\) is 1, which means that only one molecule of \(Co(NO_3)_3\) is required to react with one molecule of \(K_2S\) .
The stoichiometric coefficient for CoS is also 1, which means that one molecule of CoS is produced for every molecule of \(K_2S\)that reacts.
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Heart, 5 stars, Brainiest, and 40 coins if right! Answer needed ASAP
Which statement describes what happens when Bret runs up a flight of stairs?
A. His kinetic energy is destroyed.
B. His potential energy decreases.
C. His kinetic energy is converted into potential energy.
D. His potential energy is converted into kinetic energy.
Answers
Answer:
His kinetic energy is converted into potential energy.
Explanation:
Plz help it over science stuff
Answers
Answer:9.012
Explanation:
I used the periodic table, the mass is 9.012
Answer:
Pretty sure it would be 69(nice).
Explanation:
You add the number of protons and neutrons to find the mass
what is not considered a major characteristic of industrial agriculture?
Answers
Answer:
Es un tipo de agricultura. Se caracteriza por emplear complejos sistemas de producción. Presenta una gran tecnificación y emplea muchos recursos técnicos. Requiere de maquinaria especializada y, por ende, mucha inversión de capital.
Which type of radiation poses the fewest safety issues?
A. Beta
B. Gamma
C. Alpha
D. X-rays
Answers
Answer:
C. Alpha
Explanation:
I did it and I got it right
Answer: C. Alpha
Explanation:
can someone answer that for me
Answers
Answer:
4^4, or 256
Explanation:
When dividing numbers with exponents and the same base, you will subtract from the exponents and keep the base the same.
The temperature inside my refrigerator is about 40 Celsius. That temperature in Kelvin is K.
I place a balloon in my fridge that initially has a temperature of 220 C. This is K.
If the original volume of the balloon is 0.5 liters, what will be the volume of the balloon when it is fully cooled by my refrigerator? liters. (Round to two decimal places)
Answers
Substituting the given values, we have (0.5 L) / (220 + 273.15 K) = V₂ / (313.15 K).Solving for V₂, we get V₂ = (0.5 L) * (313.15 K) / (220 + 273.15 K).
Calculating this expression, the volume of the balloon when fully cooled by your refrigerator would be approximately 0.38 liters when rounded to two decimal places.To convert Celsius to Kelvin, we need to add 273.15 to the Celsius temperature. Therefore, the temperature inside your refrigerator of 40 degrees Celsius is equivalent to 313.15 Kelvin.Now, let's consider the ideal gas law, which states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.Since the number of moles and pressure remain constant, we can write the equation as V₁/T₁ = V₂/T₂, where V₁ is the initial volume of the balloon, T₁ is the initial temperature, V₂ is the final volume, and T₂ is the final temperature.
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Which of the following statements is false regarding the reactivity of Gilman reagents? A) They are unreactive with tertiary halides. B) They react with acyl halides to give ketones. C) They react with alkyl halides or aryl halides in a coupling reaction. D) They react with á,&-unsaturated ketones to give alcohols. Previous Not saved
Answers
The statements that is false regarding the reactivity of Gilman reagents is they react with α, β unsaturated ketones to give alcohols. The correct option is D.
The Gilman Reagent is the organometallic reagent that is containing the two R-groups that is alkyl or the aryl, the copper, and the lithium. The general formula of the Gilman reagents that can be expressed as the R₂CuLi. The Grignard reagents, are these compounds tend to the replace the halide group with the R group and when it reacted with the organic halides.
The Gilman reagent react with α, β unsaturated ketones to give the alcohols.
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What is the mass number, symbol, and charge of an atom that contains 19 protons, 20 neutrons and 19 electrons?
Answers
Answer:
Explanation:
mass number = 19 + 20 = 39 (protons + neutrons)
The charge is 0. This is an atom
The symbol = K
Protons: 19
Electrons: 19
Neutrons: 20
1. Convert 0.780 moles of CaCl2 to a number of formula units.
2. How many moles are in 9.09 x 10 22 molecules of CO2 ?
3. Find the number of moles of magnesium atoms, Mg, that are represented by 2.13 x 10 24 atoms.
show work plss
Answers
1 mole of CaCl2 = 6.02 x 10^23 formula units of CaCl2
0.780 moles of CaCl2 = 0.780 x 6.02 x 10^23 formula units of CaCl2
= 4.69 x 10^23 formula units of CaCl2
2. To convert molecules of CO2 to moles, we need to use Avogadro's number.
1 mole of CO2 = 6.02 x 10^23 molecules of CO2
9.09 x 10^22 molecules of CO2 = (9.09 x 10^22) / (6.02 x 10^23) moles of CO2
= 0.151 moles of CO2
3. To find the number of moles of magnesium atoms represented by 2.13 x 10^24 atoms, we need to divide the number of atoms by Avogadro's number.
1 mole of Mg = 6.02 x 10^23 atoms of Mg
2.13 x 10^24 atoms of Mg = (2.13 x 10^24) / (6.02 x 10^23) moles of Mg
= 3.54 moles of Mg