Please answer this, im too lazy to do the experiment.

1. What happened to the heavier materials in a mixture when left undisturbed?
2. How can we separate liquid and heavier particles in a mixture?
3. What materials are attracted by the magnet?​

3C⁻⁻ on reaction with HI gives I⁻⁻⁻ as the main products and not H⁻ and C₂H₅I.

When 3C⁻⁻ is reacted with HI, the reaction product obtained is I⁻⁻⁻ as the main product. The C₂H₅I and H⁻ are not produced in significant quantities and cannot be considered the main product.The 3C⁻⁻ compound reacts with HI in the presence of a solvent to produce hydrogen gas, H⁻, C₂H₅I, and I⁻⁻⁻. The primary product obtained is I⁻⁻⁻ because it is stable and has a higher energy than C₂H₅I and H⁻.However, the reaction can be controlled to obtain C₂H₅I and H⁻ as the primary products by changing the reaction conditions. The reaction must be carried out in anhydrous conditions and at a low temperature so that the reaction proceeds in the desired direction.

3C⁻⁻ on reaction with HI gives I⁻⁻⁻ as the main products and not H⁻ and C₂H₅I. However, the reaction can be controlled to obtain C₂H₅I and H⁻ as the primary products by changing the reaction conditions.

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1. From the ideal gas law, the variables and their units are as follows:

2. In a sealed bottle, when the temperature is raised from 200 K to 400K;

3. A life raft containing 200 g of air has another 200 g of air added.

Two quantities in the ideal gas equation that are directly proportional: temperature and volume

Two quantities in the ideal gas equation that are indirectly proportional: volume and pressure

The number of moles of the gas present in the container is 0.162 moles.

The number of moles of the gas present is calculated using the ideal gas law as follows:

PV = nRT

n = PV/RT

P = 1.8 atm

V = 2 L

G = 0.0821(L⋅atm) / (mol⋅K)

T = 270 K

n = 1.8 * 2 / 270 * 0.0821

n = 0.162 moles

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Answer:Forces include gravity, friction, and applied force. Force causes changes in the speed or direction of motion.

Explanation:

Answer:

Its force, Just did it. 100%

Explanation:

No explaination needed. I got it right.

Answer: True

Explanation: It always has the same number because the both have or are using the same product.

The atomic number for an element whose mass number is 138, which contains 81 neutrons per atom is 58

Atomic number, the number assigned to a chemical element in the periodic system, which places the elements in ascending order of the number of protons in their nuclei. As a result, the atomic number is also determined by the number of protons, which is always equal to the number of electrons in the neutral atom. The atomic number of iron is 26 because there are 26 protons in an iron atom's nucleus.

Mass number = atomic number+ number of neutrons.

Given, number of neutrons= 80

Mass number = 138

Therefore, atomic number= 138 - 80 = 58

Thus, The atomic number for an element whose mass number is 138, which contains 81 neutrons per atom is 58

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5 moles of carbon reacts with 2 moles of sulphur dioxide. Thus, 5.44 moles of SO₂ need 13.6 moles of carbon.

Sulphur dioxide is an inorganic gas formed by the covalent bonding between sulphur and oxygen atoms. Sulphur dioxide is a harmful gas which con reaction with carbon produce carbon monoxide and carbon sulphide as written below:

\(\rm 2SO_{2} + 5C \rightarrow CS_{2} + 4CO\)

As per the balanced reaction, 2 moles of SO₂ reacts with 5 moles of carbon. Hence, the number of moles of carbon which reacts with 5.44 moles of SO₂  is,

= 5.44 × 5/2

= 13.6 moles.

Therefore, 13.6 moles of carbon is needed to react with 5.44 moles of SO₂ .

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Answer:

\(MgO _{(s)} + 2H {}^{ + } _{(aq)} = Mg {}^{2 + } _{(aq)}+ H _{2} O _{(l)} \\ \)

According to the question the reaction A+B→C+D is exothermic.

Reaction in chemistry is a process in which two or more substances interact to form a new substance. Chemical reactions involve the breaking of chemical bonds and the formation of new bonds. Chemical reactions are essential for the formation and breaking of molecules, and are responsible for the production of energy.

a) The reaction A+B→C+D is exothermic.

b) The AH for the forward reaction is the difference between the enthalpies of the products and the reactants. The AH for the backward reaction is the difference between the enthalpies of the reactants and the products.

c) X would represent the position of the activated complex on the graph.

d) The activation energy for the forward reaction is the difference between the enthalpies of the reactants and the activated complex. The activation energy for the backward reaction is the difference between the enthalpies of the products and the activated complex. The forward reaction is expected to be faster because it has a lower activation energy.

e) On the same set of axes, the graph would show a decrease in the activation energy with the use of a catalyst, resulting in a lower energy barrier and faster reaction rates.

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The evidence that refutes the statement is: 4 EVIDENCE: Scientists have observed galaxies are moving away from us.

According to the observations made by astronomers, galaxies in the universe are not only moving away from each other, but they are also moving away from us.

This phenomenon is known as the expansion of the universe, and it contradicts the idea that all matter and energy in the universe was initially concentrated in a tiny corner of space during the time of the big bang and has since filled up the entire universe.

The observation that galaxies are moving away from us suggests that the universe is expanding in all directions. This expansion implies that the universe was not initially confined to a specific location but rather underwent a rapid expansion from a highly dense and hot state.

Therefore, the idea that all matter and energy in the universe was initially concentrated in a small corner of space and then expanded to fill up the whole universe is inaccurate based on the evidence of the observed expansion of galaxies. Evidence 4

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Answer: C

Explanation:

To rearrange the given equation for v, we need to isolate v on one side of the equation.  
The given equation is c = n/v. We need to rearrange this equation for v.

Firstly, we need to isolate v on one side of the equation. To do this, we will multiply both sides of the equation by v. This gives us:
cv = n
Next, we need to isolate v. To do this, we will divide both sides of the equation by c. This gives us:
v = n/c
Therefore, the rearranged equation for v is v = n/c.
In simpler terms, to find the value of v, we divide n by c.
Overall, rearranging equations is an important skill in chemistry and math. It allows us to manipulate equations and solve for different variables.

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Answer: We can translate the given chemical equation as:

"potassium permanganate combined with zinc chloride produces zinc permanganate and potassium chloride". The best option to answer the question is the first one.

Explanation:

The question requires us to choose, among the options given, the correct "translation" for the following chemical equation:

To solve this problem, we can separate the compounds into their cations and anions, and then analyze the metal (cation) name and anion name. Keep in mind that the name of the compound is formed by cation/metal name + anion name.

1) Let's start with KMnO4, which is formed by the cation K+ (potassium) and anion (MnO4)- (permanganate). The name of KMnO4 is potassium permanganate.

2) Next, let's analyze ZnCl2, which is formed by the cation Zn2+ (zinc) and anion Cl- (chloride). The name of ZnCl2 is zinc chloride.

3) Now, let's check Zn(MnO4)2, which is formed by Zn2+ (zinc) and (MnO4)- (permanganate). The name of Zn(MnO4)2 is zinc permanganate.

4) At last, let's analyze KCl, which is formed by K+ (potassium) and Cl- (chloride). The name of KCl is potassium chloride.

Therefore, we can translate the given chemical equation as:

"potassium permanganate combined with zinc chloride produces zinc permanganate and potassium chloride". The best option to answer the question is the first one.

The sequence of a peptide based on the following mrna sequence, 5' . . . uuuucuuauugucuu 3' is  phe-ser-tyr-cys-leu.

'What is peptide sequencing?'

The process of identifying the amino acids that make up a peptide chain's structural sequence is known as peptide sequencing. This knowledge must be made public in order to understand a protein's structure and function in a cell, which is important for biomedical research applications.

The nucleotide sequence of entire genomes or tiny, targeted genomic sections can be determined through sequencing. With the help of Illumina sequencing, a wide range of scientific questions about the genome, transcriptome, or epigenome of any organism can be answered. The preparation of the DNA or RNA samples and the data analysis choices used are the main differences between next-generation sequencing (NGS) approaches.

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The equilibrium constant (K) for the reaction HCN(aq) + NH3(aq) ⇌ CN(aq) + NH4(aq) can be calculated using the given concentrations. The value of K is determined to be 0.036.

To calculate the equilibrium constant (K), we need to use the concentrations of the species at equilibrium. In this case, the given concentrations are:

[HCN] = 0.100 M

[NH3] = 0.140 M

[CN] = 0.055 M

Using the balanced chemical equation, we can write the expression for K as:

K = ([CN][NH4]) / ([HCN][NH3])

Substituting the given concentrations:

K = (0.055)([NH4]) / (0.100)(0.140)

We need to determine the concentration of NH4 at equilibrium. Since HCN and NH3 react to form CN and NH4, we can assume that the change in concentration of NH3 is equal to the change in concentration of NH4.

Change in [NH3] = Change in [NH4]

Let's assume x is the change in concentration of NH3 and NH4 at equilibrium. Therefore:

[HCN] = 0.100 - x

[NH3] = 0.140 - x

[CN] = 0.055 + x

[NH4] = x

Now we can substitute these values into the equilibrium constant expression:

K = (0.055 + x)(x) / ((0.100 - x)(0.140 - x))

Simplifying the expression and neglecting the x term in comparison to the initial concentrations:

K = (0.055)(x) / (0.100)(0.140)

Solving for x:

K = 0.036

Therefore, the equilibrium constant (K) for the given reaction is 0.036.

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The following organic molecules are isomers CH3CH₂CH₂CH3. Option A.

All organic compounds have isomers. Isomers mean that they have the same molecular formula but different configurations. The connectivity of a connection ultimately determines its functionality. For example, the same molecular formula can be used to identify alcohols or ethers.

Isomers are molecules that have the same molecular formula but differ in the arrangement of their atoms in space. This excludes all other configurations by rotating the molecule as a whole or around specific bonds. In organic chemistry, isomers are molecules that have the same molecular formula but differ in the structural or spatial arrangement of the atoms within the molecule.

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Answer:

The reactions of the cycloalkanes are generally just the same as the alkanes, with the exception of the very small ones - particularly cyclopropane. ... In the absence of UV light, cyclopropane can undergo addition reactions in which the ring is broken

The rate constant, k, for the decomposition reaction :  k = 0.0124 / days

Given

The half-life of 56 days

Required

The rate constant, k

Solution

For first-order, rate law : ln[A]=−kt+ln[A]o

The half-life :  the time required to reduce to half of its initial value.

The half life :

t1/2 = (ln 2) / k

k = (ln 2) / t1/2

k = 0.693 / 56 days

k = 0.0124 / days

The rate constant for the decomposition reaction has been 0.0124/days.

The rate constant has been given by;

log [Final concentration] = kt + log [Initial concentration]

k has been the rate constant, and t has been the time.

The initial concentration has been 1, after the half life period the concentration  has been half i.e. 0.5 .

The given half life has been 56 days.

The rate constant can be calculated as:

log 1 = k(56) + log 0.5

k(56) = 0.693

k = 0.0124/days.

The rate constant for the decomposition reaction has been 0.0124/days.

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Answer:

1. Endothermic

2. Exothermic

3. Exothermic

4. Endothermic

Explanation:

A P E X

Converted Recipe for 10 ounces:

- 4 oz Chicken stock

- 8 oz Butter

- 24 oz Flour

- 20 oz Shrimp

Note: The conversion factor is based on the assumption that the density of the ingredients remains constant.

To convert the recipe to yield 10 ounces, we need to determine the conversion factor and apply it to each ingredient.

The conversion factor is calculated as follows:

Desired Yield / Original Yield

Conversion factor = 10 oz / 1.25 gal

Let's convert each ingredient:

1/2 gal Chicken stock:

Conversion factor = 10 oz / 1.25 gal = 8 oz/gal

Converted amount = (1/2 gal) * (8 oz/gal) = 4 oz

8 oz Butter:

No conversion is needed since the amount remains the same.

3 C Flour:

Conversion factor = 10 oz / 1.25 gal = 8 oz/gal

Converted amount = (3 C) * (8 oz/gal) = 24 oz

2.5 # Shrimp:

Conversion factor = 10 oz / 1.25 gal = 8 oz/gal

Converted amount = (2.5 #) * (8 oz/gal) = 20 oz

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Ionic and Covalent Bonds.

Ionic bonds are between metals and non-metals, where electrons are transferred from the metal to the non-metal.

Covalent bonds are between non-metals, where electrons are shared between atoms and are not lost or gained.

In Anions, electrons are gained

Anions are negatively charged ions. They gain electrons to achieve a stable electron configuration.

b) Electrons are negatively charged subatomic particles that orbit the nucleus of an atom. They are responsible for chemical reactions and the formation of chemical bonds between atoms.

The most common examples of anions are halide ions such as chloride (Cl-), bromide (Br-), and iodide (I-), which are formed by the addition of an extra electron to the outermost shell of a halogen atom.

Other examples of anions include hydroxide (OH-), sulfate (SO42-), and nitrate (NO3-), which are important in many chemical reactions and biological processes. Anions are usually attracted to positively charged ions or molecules, called cations, to form ionic compounds.

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The sequence of atomic numbers 1, 2, 3, and 4 denotes the periodic table's ordering of following elements.

Series are significant because they offer a possible point of entry. It's possible for a user to merely be aware of the fact that a publication is part of a specific series or to be searching for all publications in that series without being aware of any of the individual titles. The series could potentially be used as a storage and control system.

There are two ways to recognize elements in a series: The elements are in series if there are two and only two connections between them and a single node. When two elements' currents are determined to be similar by KCL at a node, the elements are in series.

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Answer:

Electrons orbit the nucleus.

Answer:

electrons

Explanation:Atoms are made up of protons and neutrons located within the nucleus, with electrons in orbitals surrounding the nucleus.

The hydrogenation of a monounsaturated fatty acid, such as oleic acid, can indeed yield a saturated fatty acid.

Oleic acid has the molecular formula CH₃(CH₂)7CH=CH(CH₂)7COOH, where the double bond is located between the ninth and tenth carbon atoms from the carboxylic acid end.

Hydrogenation is a chemical reaction that involves the addition of hydrogen (H₂) to a compound. In the case of oleic acid, hydrogenation can be achieved by using a suitable catalyst, typically a metal catalyst such as nickel or palladium, under specific reaction conditions.

During hydrogenation, the double bond in oleic acid is broken, and hydrogen atoms are added to the carbon atoms that were part of the double bond. This process converts the unsaturated fatty acid into a saturated fatty acid. The resulting saturated fatty acid derived from oleic acid is called stearic acid, which has the molecular formula CH₃(CH₂)16COOH.

By undergoing hydrogenation, oleic acid, a monounsaturated fatty acid with one double bond, is converted into stearic acid, a saturated fatty acid with no double bonds. The addition of hydrogen atoms effectively saturates the fatty acid chain, removing the unsaturation.

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Complete Question:  hydrogenation of a monounsaturated fatty acid yields a saturated fatty acid. oleic acid, ch3(ch2)7ch. What is the difference in molecular structure between oleic acid and stearic acid after hydrogenation?

The theoretical yield of diazotized sulfanilic acid can be calculated by multiplying the molar ratio of sulfanilic acid (the limiting reagent) to methyl orange by the molar mass of sulfanilic acid. The molar ratio of sulfanilic acid to methyl orange is 1:1, and the molar mass of sulfanilic acid is 243.26 g/mol. Therefore, the theoretical yield of diazotized sulfanilic acid is 243.26 g/mol.

To calculate the theoretical yield of methyl orange, we need to know the molar ratio of methyl orange to diazotized sulfanilic acid. This is determined by the reaction conditions, and typically the molar ratio of methyl orange to diazotized sulfanilic acid is 3:2. This means that for every 3 moles of methyl orange, 2 moles of diazotized sulfanilic acid are required. The molar mass of methyl orange is 384.2 g/mol. Multiplying the molar ratio (3:2) by the molar mass of methyl orange yields a theoretical yield of 576.3 g/mol.

In conclusion, the theoretical yield of diazotized sulfanilic acid is 243.26 g/mol, and the theoretical yield of methyl orange is 576.3 g/mol.

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Answer:

because you might have a too much bigger than explosion if you add more baking soda or vinegar

Explanation:

You use the same amount of baking soda and the same amount of liquid for each combination for the explosion.

We know that,

When you use the same amount of baking soda and the same amount of liquid for each combination then be get the explosion.

Baking soda and liquid are base and acid so they react chemically.

Here, the given liquid is vinegar

If you will increase the amount of baking soda and if you will increase the amount of liquid then no reaction

So, you use the same amount of baking soda and the same amount of liquid for each combination for the explosion.

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The energy of combustion for 1 gm of the hydrocarbon is 0.56 kJ

What is a bomb calorimeter?

Bomb Calorimeter is a constant-volume  calorimeter which  measures the heat of a particular reaction or measures the calorific value of the fuels. They can withstand  large pressure produced within the calorimeter due to the reaction or burning of fuel.

The above question can be solved by

Energy of combustion = m X c X ΔT

m = mass of hydrocarbon burnt  ,

 c = heat capacity of calorimeter   ,

 ΔT = temperature change

Energy of combustion = 0.106g X 2.47kJ/K X 2.14K = 0.56kJ

Energy of combustion when 1g of hydrocarbon is burnt = (0.56kJ / 0.106g ) X 1g = 5.28kJ

Hence,  The energy of combustion for 1 gm of the hydrocarbon is 0.56 kJ

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Answer:

Explanation:

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