Sanger sequencing requires dideoxynucleotides, although PCR does not.
What is DNA sequencing?
A DNA molecule's exact nucleotide or base sequence can be found using a general laboratory procedure known as DNA sequencing. The bases' order encodes the biological information that cells utilize to grow and function (commonly referred to by the initial letters of their chemical names: A, T, C, and G).
Polymerase chain reaction (abbreviated PCR) is a laboratory technique for rapidly producing (amplifying) millions to billions of copies of a specific segment of DNA, which can then be studied in greater detail. PCR involves using short synthetic DNA fragments called primers to select a segment of the genome to be amplified, and then multiple rounds of DNA synthesis to amplify that segment.Sanger sequencing is a technique for DNA analysis that uses electrophoresis and is based on DNA polymerase's haphazard incorporation of chain-terminating dideoxynucleotides during in vitro DNA replication. It was the most extensively used sequencing technique for over 40 years after Frederick Sanger and colleagues initially developed it in 1977. In 1986, Applied Biosystems launched the first commercialization of it. For large-scale, automated genome analysis, next-generation sequencing techniques have lately displaced greater volume Sanger sequencing. For smaller-scale initiatives and the verification of deep sequencing results, the Sanger method is still widely used.Hence, Sanger sequencing requires dideoxynucleotides, although PCR does not.
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octyl formate is an ester that has the flavor of oranges. it can be synthesized from an alcohol and a carboxylic acid. what alcohol is needed to make octyl formate? choose... what carboxylic acid is needed to make octyl formate?
Octanol alcohol is needed to make octyl formate and Formic Acid carboxylic acid is needed to make octyl formate.
The organic substance 1-octanol, commonly referred to as octan-1-ol, has the chemical formula CH3(CH2)7OH. The alcohol is fatty. In general, octanols refer to a wide variety of different isomers. In the industrial setting, octanol is mostly generated by oligomerizing ethylene with triethyl aluminum, followed by oxidation of the resulting alkylaluminium products. The Ziegler alcohol synthesis is the name of this method.
An organic acid with a carboxyl group connected to an R-group is referred to as a carboxylic acid in organic chemistry. R stands for the alkyl, alkenyl, aryl, or other group, and the typical formula of a carboxylic acid is RCOOH or RCO2H. It is common to find carboxylic acids.
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True or False: A neutrally charged atom has an equal number of protons and electrons.
Answer:
True
Explanation:
Answer:
True
Explanation:
A neutral atom must have an equal amount of protons as electrons.
Ammonia produced from the Haber process is responsible for feeding over a quarter of
the world’s population. Using this reaction equation, answer the question below.
N₂ + 3H₂ ⇒ 2NH₃
1. If you had 3 moles of N2 and an excess of H2, how many moles of NH3 would be produced?
2. How many moles of N2 are needed to react completely with 12 moles of H2?
3. If you had 30 molecules of H2 and an excess of N2, how many molecules of NH3 would be produced?
1. 2 moles of nitrogen reacting with an excess of hydrogen will produce moles of ammonia6 moles [tex]NH_3[/tex].
2. The number of moles of nitrogen needed to completely react with 12 moles of hydrogen is 4 moles.
3. 30 molecules of hydrogen reacting with an excess of nitrogen will produce 20 molecules of ammonia.
Stoichiometric problemThe balanced equation of the reaction between hydrogen and nitrogen to produce ammonia is as follows:
[tex]N_2 + 3H_2 -- > 2NH_3[/tex]
This means that the mole ratio of [tex]N_2[/tex] to [tex]H_2[/tex] to [tex]NH_3[/tex] is 1:3:2.
If there are 3 moles of [tex]N_2[/tex] an excess of [tex]H_2[/tex]. The mole ratio of [tex]N_2[/tex] to [tex]NH_3[/tex] is 1:2. This means that for every 1 mole [tex]N_2[/tex] that reacts, 2 moles of [tex]NH_3[/tex] are produced.1 mol [tex]N_2[/tex] = 2 mol [tex]NH_3[/tex]
3 mol [tex]N_2[/tex] = 3 x 2
= 6 moles [tex]NH_3[/tex]
The mole ratio of [tex]N_2[/tex] and [tex]H_2[/tex] is 1:3.3 mol [tex]H_2[/tex] = 1 mol [tex]N_2[/tex]
12 mol [tex]H_2[/tex] = 12 x 1/3
= 4 moles [tex]N_2[/tex]
The mole ratio of [tex]H_2[/tex] and [tex]NH_3[/tex] is 3:2.3 mol [tex]H_2[/tex] = 2 mol [tex]NH_3[/tex]
30 mol [tex]H_2[/tex] = 30 x 2/3
= 20 moles [tex]NH_3[/tex]
In other words, the problem is solved from the balanced equation of the reaction.
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the following initial rate data are for the reaction of hypochlorite ion with iodide ion in 1 m aqueous hydroxide solution: experiment , m , m initial rate, 1 0.00381 0.00794 2 0.00381 0.0159 3 0.00762 0.00794 4 0.00762 0.0159 complete the rate law for this reaction in the box below. use the form , where '1' is understood for or and concentrations taken to the zero power do not appear.Don't enter 1 for m or n Rate = From these data, the rate constant is M-1s-1. Submit Answer.
The rate law in general form for this reaction is:
rate = k[A]^m x [B]^n
and we want to determine m and n.
Notice the experiments conducted involved verifying the concentration of one of the reactants while keeping the other constant. By comparing two experiments in this way and noticing the effect on the reaction rate, one can deduce the order with respect to that reactant.
Take experiments 1 and 2 :
Doubling the concentration of OH⁻ while keeping (CH₃)₃CBr constant had no effect on the initial rate.
This implies the order with respect to [OH⁻] is zero.
From experiments 1 and 3 we see that doubling the [ (CH₃)₃CBr ] while keeping [OH-] the same doubles the initial rate.
We now have the orders of the two reactants, and the rate law will be:
rate = k [ (CH₃)₃CBr ] [ OH⁻]⁰ = k [ (CH₃)₃CBr ]
We could use another comparison to check our answer. For example comparing 3 and 4, maintaining [ (CH₃)₃CBr ] constant and doubling [ OH⁻] has no effect on the rate which confirms the order respect to [ OH⁻] is zero.
The rate constant we can determine it from any of the experiment by solving for k, for example from experiment 1:
7.14 x 10⁻³ M/s = k x 0.626 M ⇒ k = 0.011 s⁻¹
Therefore, the rate constant of the following reaction is 0.011 s⁻¹.
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Where do convection currents happen?(1 point)
Responses
A.crust
B.core
C.mantle
D.inner core
Which statement is correct about the movement of plates that sit on top of the mantle? (1 point)
Responses
A.They regularly move because of the convection currents of magma.
B.They never move because they are connected to Earth’s crust.
C.They never move because they are connected to mountains.
D.They regularly move because of the convection currents of oceans.
Which statement is correct about the flow of thermal energy inside Earth?(1 point)
Responses
A.Energy flow inside the mantle causes magma to sink deeper.
B.Energy flow inside the crust causes magma to rise.
C.Energy flow inside the crust causes magma to sink deeper.
D.Energy flow inside the mantle causes magma to rise.
Which is a result of boundary plates colliding or sliding past each other? (1 point)
Responses
A.valleys form
B.earthquakes occur
C.mountains form
D.volcanoes erupt
The convection currents happen in the mantle, option C.
The statement is correct about the movement of plates that sit on top of the mantle is option D.They regularly move because of the convection currents of oceans.
The statement that is correct about the flow of thermal energy inside Earth is optionB. Energy flow inside the crust causes magma to rise.
The result of boundary plates colliding or sliding past each other is option B. earthquakes occur
How can be the Convection currents described?Convection currents can be identified in the Earth's mantle wherby the materials that are been heated which is the mantle material will be rising from deep inside the mantle, then the cooler mantle material will definitely sinks which will bring about the convection current.
It should be noted that the Transform boundaries which is as a result of the sliding of the plates could results in shallow earthquakes.
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Answer: Where do convection currents happen?
Responses= mantle
Which statement is correct about the movement of plates that sit on top of the mantle= They regularly move because of the convection currents of magma.
Which statement is correct about the flow of thermal energy inside Earth= Energy flow inside the mantle causes magma to rise.
Which is a result of boundary plates colliding or sliding past each other= earthquakes occur
Explanation: I took the test
A 35.40 gram hydrate of sodium carbonate, Na2CO3•nH2O, is heated to a constant mass. Its final weight is 30.2 g. What is formula for the hydrate?A. Na2CO3∙1H2OB. Na2CO3∙2H2OC. Na2CO3D. Na2CO3∙3H2O
First, we have to calculate the molecular weights of each molecule:
[tex]\begin{gathered} Na_2CO_3\text{ : 23*2+12+16*3= 106 g/mol} \\ H_2O\text{ : 1*2+16= 18 g/mol} \end{gathered}[/tex]Then, we have to calculate the number of grams of water. We can calculate them because the process of evaporation lets us know the water amount that was retired:
[tex]g\text{ H}_2O\text{ = 35.40 g - 30.2 g=5.2 g H}_2O[/tex]Then, we're gonna convert the grams of sodium carbonate alone (30.2 g) and the grams of water to moles:
[tex]\begin{gathered} 30.2\text{ g Na}_2CO_3\text{ * }\frac{1\text{ mol}}{106\text{ g}}=\text{ 0.2849 mol Na}_2CO_3\text{ }\approx0.3\text{ mol Na}_2CO_3 \\ \\ 5.2\text{ g H}_2O\text{ * }\frac{1\text{ mol}}{18\text{ g}}=\text{ 0.288 mol H}_2O\text{ }\approx\text{ 0.3 mol H}_2O \end{gathered}[/tex]It means that the mole relation is 1:1 approx, as it is the same amount for both. Then, the formula is going to be:
[tex]Na_2CO_3\text{ . 1H}_2O[/tex]It means that the answer is A.
the number 207.2 in the box labeled Pb on the periodic table represents..?
1) the number of electrons and neutrons
2)the number of electrons in a neutral atom
3) the average atomic mass
4)the number of protons, neutrons, and electrons
5)the atomic matter
The properties of the given element, Pb, is as follows:
the number of electrons is 82 and the neutrons is 125the number of electrons in a neutral atom is 82the average atomic mass is 207.2the number of protons = 82, neutrons = 125, and electrons = 82the atomic matter is solid.What is the periodic table?The periodic table is an arrangement of the elements in increasing order of atomic number.
The atoms of elements are composed of three sub-atomic particles;
electrons- negatively charged particlesprotons - positively charged particlesneutrons - neutral particlesThe element Lead, Pb, is a metallic element found in the periodic table and has an atomic number of 82 and an average atomic mass of 207.2
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What is the missing (?) in the chemical equation for cellular respiration? glucose + oxygen --> water + ? + atp.
The complete balanced chemical equation for cellular respiration is as follow:
Glucose(C₆H₁₂0₆) + 6O₂ --> 6H₂O+ 6CO₂ + ATP.
The process through which cells break down molecules for getting energy is known as cellular respiration. The cells use the oxygen present in air to accomplish this process and produces CO₂ exhale in the atmosphere. Basically, during process of cellular respiration, Carbon dioxide is created when the oxygen present in body and the glucose present in food are combined together converted in to carbon dioxide, water and strongly powered reaction releases energy in the form of ATP molecules. Ion transport, muscular contraction, nerve impulse transmission, substrate phosphorylation, and chemical synthesis are just a few of the processes that use ATP as an energy source.
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Write a balanced equation for the complete oxidation reaction that occurs when methanol (ch3oh) burns in air.
The balanced equation for the complete oxidation reaction that occurs when methanol CH₃OH burns in air is 2CH₃OH + 3O₂ → 2H₂O + 4CO₂.
When Methane CH₃OH reacts with O₂, it get oxidized and CO₂ and H₂O are formed.
The chemical equation of the oxidation of methane when it burns in the air is,
CH₃OH + O₂ → H₂O + O₂
In order to balance the reaction, we should start first with carbon, then Hydrogen and at the end, we will balance oxygen atoms on both the sides of the reaction,
So, the balanced chemical equation becomes,
2CH₃OH + 3O₂ → 2H₂O + 4CO₂
So, in this reaction, Carbon is getting oxides as it is becoming carbon dioxide by the addition of oxygen into it and Oxygen itself is getting reduced.
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Gravity is a (n) _____________ between objects and depends on an object's size and their distance apart.
Gravity is a (n) force between objects and depends on an object's size and their distance apart.
Gravitational force is the attractive that exist between all object with mass an object with mass attracts another object with mass the magnitude of the force is directly proportional to the masses of the two objects and inversely proportional to the square of the distance between the two objects
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lead(ii) nitrate reacts with sodium sulfate in a double displacement reaction. assign oxidation numbers to elements/polyatomic ions. which element/polyatomic ion has the largest magnitude of change in oxidation number?
lead(ii) nitrate reacts with sodium sulfate in a double displacement reaction. Pb (NO₃)₂+Na₂so₄⇒Pbso₄+ 2NaNO₃ . nitrogen has highest change in oxidation number{+2 to +5}
what is oxidation state?Oxidation state indicates the degree of oxidation for an atom in a chemical compound; it is the hypothetical charge that an atom would have if all bonds to atoms of different elements were completely ionic. Oxidation states are typically represented by integers, which can be positive, negative, or zero.
Pb{+2}⇒Pb{+2} no change in oxidation state
N{+2}⇒N{+5} oxidation state increase by a factor of three
Na{+1}⇒Na{+1} oxidation state no change
S{+6}⇒S{+6} no change in oxidation
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You were helping your science teacher put away lab materials. They asked you to carry sand, iron filings, and salt in cups to put away. However, a fellow student left their backpack in the middle of the floor. You fell over it and dropped all of the materials. After sweeping up the mess, all of the sand, iron filings and salt are mixed together. Your job now is to use the physical properties of these substances to separate the mixture and return the pure substances to their separate containers.
What physical property or properties might help you remove salt from the mixture? (2 points)
What process will you use to separate the salt from the mixture? (2 points)
What physical property of properties might help you remove iron from the mixture? (2 points)
What process will you use to separate the iron from the mixture? (2 points)
What physical property or properties might help you remove sand from the mixture? (2 points)
What process will you use to remove sand from the mixture? (2 points)
Now, list the steps that you will take to separate the three components of the mixture. Be specific enough that someone else could complete the mixture separation exactly as you have planned to do it. You may use bullet points and labeled diagrams to answer this question. (8 points, see rubric)
Physical property might help you remove salt from the mixture solubility. Process use to separate the salt from the mixture is filtration and Distillation. Physical property of properties might help to remove iron from the mixture is Magnetism. process will you use to separate the iron from the mixture is using magnet. Physical property or properties might help you remove sand from the mixture is solubility. process use to remove sand from the mixture Filtration.
First we separate iron fillings from the mixture by using magnet. Then we dissolve the sand and salt mixture in water. salt is soluble in water and sand is insoluble in water. sand is now can be separated by the filtration process. last we have salt mixed in water . on heating the solution water get evaporated and salt crystal are left behind.
Thus, Physical property might help you remove salt from the mixture solubility. Process use to separate the salt from the mixture is filtration and Distillation. Physical property of properties might help to remove iron from the mixture is Magnetism. process will you use to separate the iron from the mixture is using magnet. Physical property or properties might help you remove sand from the mixture is solubility. process use to remove sand from the mixture Filtration.
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The dog has a mass of 57kg and the boy has a mass of 48 kg. Who has more kinetic energy?
Answer:
The Dog
Explanation:
The more mass something has the more kinetic energy it has in it.
Question 3 of 5Why do you need to use soap when you wash oil from your hands?OA. The soap is polar and can therefore interact with both the waterand the oil.OB. The soap has a polar end that can interact with the water and anonpolar end that can interact with the oil.OC. The soap has a nonpolar end that can interact with the water anda polar end that can interact with the oil.ОD. The soap is nonpolar and can therefore interact with both thewater and the oil.
Answer
B. The soap has a polar end that can interact with the water and a nonpolar end that can interact with the oil.
Explanation
In the case of soap, the carbon chain dissolves in oil and the ionic end dissolves in water. Thus, the soap molecules form structures called micelles. In micelles, one end is towards the oil droplet, and the other end which is the ionic faces outside.
Hence, the correct answer is:
B. The soap has a polar end that can interact with the water and a nonpolar end that can interact with the oil.
Copper was one of the earliest metals used by humans, because it can be prepared from a wide variety of copper minerals, such as cuprite (cu2o), chalcocite (cu2s), and malachite [cu2co3(oh)2]. Balance the following reactions for converting these minerals into copper metal. Place a coefficient in each gray box.
Will be the balanced chemical reaction.
A chemical reaction is a procedure that causes one group of chemical components to change chemically into another. Chemical reactions, which can frequently be described by a chemical equation, traditionally include changes that only involve the positions of electrons in the formation and dissolution of chemical bonds between atoms, with no change to the nuclei (no change to the elements present). The study of chemical reactions involving unstable and radioactive elements, where both electronic and nuclear changes may take place, is known as nuclear chemistry.
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0.10 mm kmno4 has an absorbance maximum of 0.26 at 525 nm in a 1.000-cm cell. find the molar absorptivity and the concentration of a solution whose absorbance is 0.52 at 525 nm in the same cell. watch your units.
Molar absorptivity and the concentration of the solution whose absorbance is 0.52 at 525nm is 2600M-1 cm-1 and 0.20mM.
Molar absorbance is the measure how strongly a chemical species absorbs at given wavelength of light. Beers law relates the absorbance of a solution to its molar concentration. Beers law states that the light that absorbs by the solution is directly proportional to the concentration of the substance absorbing the light.
Absorbance and concentration are related to each other using the path length of light and molar absorptivity of the substance. Molar absorptivity of a substance is given by,
A= E.I.C
0.26= 1.00cm .e . 0.10 . 10-3 M
e= 0.26 / 0.10 *10-3 M.cm
= 2600M-1cm-1
In the same way we have to calculate the concentration of the another sample using path length and molar absorptivity which are same for both the samples .
Calculating the relation, we got the concentration of 0.2mM.
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Molecules of gas in the air absorb
light of shorter wavelengths in the
range of 450-495nm is an example
of?
Molecules of gas in the air absorb light of shorter wavelengths in the range of 450-495nm is an example of quantitative data.
Quantitative data is defined as the data that can be counts in number or can be measured in numbers. There are two main types of quantitative data : discreate data and the continuous data. examples are age , date, distance , weight etc. so, the countable and measurable quantities in numbers is quantitative data. Wavelength here is measured in numbers . so, wavelength is the quantitative data.
Thus, Molecules of gas in the air absorb light of shorter wavelengths in the range of 450-495nm is an example of quantitative data.
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16.Sulfur has 16 electrons. After it bonds with Magnesium it acquires a 2- charge. How many electrons does the S2- ion contain?Select one:a. 2b. 8c. 16d. 18
18 electrons.
Explanations:According to the question, we have that sulphur has 16 electrons and after bonding with magnesium acquired a 2-charge. The sulphur ion S2- shows that sulphur has gained 2electrons to become stable.
Amount of electron S2- have = 16 electron + 2electrons
Amount of electron S2- have = 18 electrons
Hence the number of electrons S2- ion have is 18 electrons.
1. in a few sentences define each of the three main classes of isomers below. configurational isomers can be further classified as either enantiomers or diastereomers and should also be discussed. your descriptions should enable your peers to quickly and easily compare and contrast the differences between the different classes of isomers. a. constitutional isomers (or structural isomers) b. conformational isomers c. configurational isomers(or stereoisomers) i. enantiomers ii. diastereomers
Configurational isomers are stereoisomers that can't be transformed into each other via rotating the molecule around a single bond. those configurational isomers may be found in kinds such as geometrical isomers and optical isomers.
Enantiomers are pairs of compounds with precisely equal connectivity however contrary to three-dimensional shapes. Enantiomers aren't the same as every different; one enantiomer can not be superimposed on the alternative. Enantiomers reflect images of every different.
Diastereomers are a kind of stereoisomer. Diastereomers are described as non-mirror pictures, non-same stereoisomers. hence, they arise whilst two or greater stereoisomers of a compound have specific configurations at one or greater of the equal stereocenters and aren't replicate pics of every different
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a student needs to prepare 250 ml of a 0.800 m aqueous solution of sucrose, c12hz2011 (aq), which is used frequently in biological experiments 200 ml 250 ml 150 200 100 150 100 250 ml which type of glassware should be used to make this solution (assuming that the accuracy of the concentration is important)? 0 a how should the correct amount of solute be obtained? measure out x cm of sucrose with a ruler: measure out x g of solid sucrose on a balance. measure out x mol of solid sucrose on a molemeter based on the selected correct unit; what is the value of x?
The type of glassware that students need to use to prepare 250 ml of a 0.800 m aqueous solution of sucrose is a volumetric flask and the correct amount of solute to use is 68.46g.
It is always recommended to use volumetric flask when you make sucrose solution, as accuracy is very important. Other glassware can be used to make water measurements more accurate, but it is always better to use a volumetric flask to this stock solution. and the correct amount of solute to use can be calculate as follow:
In this case, sucrose is a solid compound, so the best way to measure it is to use a balance and weigh the required mass based on the concentration of the solution. Therefore, it is best to measure grams of solute on a scale.
The amounts required are:
M = n/V
n = M*V
n = 0.800 * 0.250 = 0.2 moles
To get the mass:
m = n*MM
The molar mass of sucrose is 342.3 g/mol.
m = 0.2 * 342.3
m = 68.46g
Finally, after we have weighed the mass of sucrose we need, so all that remains is to add the solute to the volumetric flask and add water. In this way, sucrose mixes with water into a solution. Then, to make the solution 0.800M, the volume should be 250mL.
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A 35. 0 ml portion of 0. 255 m nitric acid is added to 45. 0 ml of 0. 328 m mg(no3)2. What is the concentration of nitrate ion in the final solution?.
The concentration of nitrate ion in the final solution is 0.48 M.
An abundance of a constituent divided by the total volume of a mixture is known as concentration. There are various types of concentrations: Mass, molar, number, and volume. The quantity of a solute found in the given amount of solution is the concentration of the substance. Concentration is expressed in terms of molarity.
Molarity means the number of moles per litre. The unit symbol is mol / L or mol / dm³ in the SI unit.
To calculate the concentration of the solution,
[tex]C_{1}V_{1} + n C_{2}V_{2} = C * total volume[/tex] → 1
where, [tex]C_{1}[/tex] = concentration of the starting solution
[tex]C_{2}[/tex] = concentration of the desired solution
[tex]V_{1}[/tex] = volume of the starting solution
[tex]V_{2}[/tex] = volume of the desired solution
As per the question,
[tex]C_{1}[/tex] = 0.255 M[tex]C_{2}[/tex] = 0.328 M [tex]V_{1}[/tex] = 35.0 ml = 0.035 L [tex]V_{2}[/tex] = 45.0 ml = 0.045 LSubstitute the values in 1,
⇒ [tex]C_{1}V_{1} + n C_{2}V_{2} = C * total volume[/tex]
⇒ 0.255 × 0.035 + 2 × 0.328 × 0.045 = C × 0.08
⇒ 0.008925 + 2 × 0.01476 = C × 0.08
⇒ 0.008925 + 0.02952 = C × 0.08
⇒ C × 0.08 = 0.038445
⇒ C = 0.038445 / 0.08
⇒ C = 0.4805625
Therefore, 0.48 M is the concentration of the Nitrate ion in the final solution.
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27.A full bag of trash is placed in a trash compactor. After compacting, which of the following properties of the bag of trash have changed?1. Mass2. Volume3. DensitySelect one:a. 1 onlyb. 1 and 2 onlyc. 2 and 3 onlyd. 2 only
ANSWER
option D
EXPLANATION
When a full bag of trash is placed in a compactor, the compactor will compress the bag so as to allow more trash to fill in. This is done by increasing the capacity of the trash.
Therefore, the volume of the trash bag will changed
Hence, the correct answer is option D
1. what is an aquifer? a. a water purification system b. water distribution system c. geological formation that stores water d. a drinking water solution
An aquifer is a geological formation that stores water. they are higher than the surrounding terrain, which can lead to springs or artesian wells that are in motion. An aquifer can be a well, spring, lake ,etc.
What is an aquifer?Water collects in geological formations called aquifers, frequently at great depths in the earth. Some aquifers are higher than the surrounding terrain, which can lead to springs or artesian wells that are in motion.
Hence, An aquifer is a geological formation that stores water. they are higher than the surrounding terrain, which can lead to springs or artesian wells that are in motion.
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Dr. West mixes zinc (Zn) and hydrochloric acid (HCl) together in his laboratory. The two chemicals react to form hydrogen gas (H2) and zinc chloride (ZnCl2).
Dr. West mixes zinc (Zn) and hydrochloric acid (HCl) together in his laboratory. The two chemicals react to form hydrogen gas (H₂) and zinc chloride (ZnCl₂). The balance chemical equation is given as :
Zn + 2HCl ----> ZnCl₂ + H₂
Zinc react very rapidly with hydrochloric acid to form zinc chloride and hydrogen gas. This reaction is called as displacement reaction because zinc is displaces the hydrogen and form zinc chloride and hydrogen gas. The reaction is exothermic because it releases a lot of heat.
Thus, Dr. West mixes zinc (Zn) and hydrochloric acid (HCl) together in his laboratory. The two chemicals react to form hydrogen gas (H₂) and zinc chloride (ZnCl₂). The balance chemical equation is given as :
Zn + 2HCl ----> ZnCl₂ + H₂
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Mass has to do with how many particles
of matter are in something. Something
with more particles of matter will have...
The law of definite proportions agrees with Dalton atomic theory.
What is Dalton atomic theory?
It state that all matters is made of very tiny particles called atom. atoms are individual particles which can not be created or be destroyed in a chemical reactions. Atoms of given elements are identical in mass and chemical properties. Atoms of
different elements have different masses and chemical properties.
The law of definite proportions also known as proust's law ,state that a chemical compound contain the same proportion of elements by mass.this law is one of the stoichiometry .
Thus ,
This is the reason why it is agrees with dalton atomic theory.
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2. Infer what is meant by an amorphous solid.
Answer:
Amorphous solid is a form of solid
Explanation:
Amorphous solid is a solid in which atoms are not arranged in a definite geomatric pattern for eg. glass,paper etc
As the pressure of a system increases, what happens to the volume?
To answer this, we use Boyle's Law:
States that, at constant temperature, the pressure P of a gas varies inversely with its volume V.
So, if the pressure increases, the volume will decrease.
Answer: The volume decreases.
an aqueous sodium acetate, nac2h3o2 , solution is made by dissolving 0.185 mol nac2h3o2 in 0.620 kg of water. calculate the molality of the solution.
The Molality of the aqueous sodium acetate,NaC2H3O2 solution is 0.298m.
Molality is defined as the amount of solute expressed in the number of moles present per kilogram of solvent. The units of molarity are mol/kg. The formula used to calculate molality is ,
Molality of the solution=moles of the solute /mass of the solvent
An aqueous sodium acetate solution is made by dissolving 0.185 mole NaC2H3 in 0.620 kg of water. here solvent is the water and solution is sodium acetate.
Moles of NaC2H3O2 = 0.185 mole
Mass of solvent = 0.620 kg
putting all values in the expression of molality we get,
Molality of NaC2H3O2 = 0.185 mole / 0.620
=0.298m
Hence, the molality of solution is 0.298 m.
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Answer:
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Explanation:
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