Given the following unbalanced equation:
Mg +
02-
Mgo
If you want to make 47 moles of Mgo, how many moles of Mg do you need?

Nitrogenous bases refer to the building blocks of DNA and RNA molecules. They are molecules that contain nitrogen and other elements. Four nitrogenous bases are found in DNA: adenine (A), guanine (G), cytosine (C), and thymine (T).These bases are divided into two categories: purines and pyrimidines.

Purines include adenine (A) and guanine (G), which are two-ringed structures. Pyrimidines include thymine (T) and cytosine (C), which are one-ringed structures. Purines always pair with pyrimidines in DNA, resulting in a consistent diameter for the DNA helix.Nitrogenous bases play a crucial role in encoding genetic information because they are responsible for holding the information in the DNA molecule. They can bind to one another via hydrogen bonding. The number of hydrogen bonds between base pairs determines their strength, which is essential in DNA replication and protein synthesis. For example, the pairing of guanine with cytosine is stronger than the pairing of adenine with thymine. Adenine pairs with thymine, while guanine pairs with cytosine, resulting in complementary base pairing.A single strand of DNA contains four types of nitrogenous bases, and each base has a complementary base. A strand of DNA is always composed of nucleotides, which are made up of a phosphate group, a sugar, and a nitrogenous base. Therefore, the four nitrogenous bases are essential building blocks of DNA molecules.

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Answer:

23percent

Explanation:

correct this or not?

Answer:

joules

Heat is the transfer of thermal energy from a system to its surroundings or from one object to another as a result of a difference in temperature. Heat is measured in joules (J).

Explanation: Mrk me brainliest please

Answer: Joules or calories

Examples include storage polysaccharides such as starch, glycogen and galactogen and structural polysaccharides such as cellulose and chitin. Here's the answer, but I think it's A

When a carboxylic acid is reacted with a base, it will produce a carboxylate salt. the correct option is (b).

The reaction between a carboxylic acid and a base will result in the formation of a carboxylate salt. When a carboxylic acid is neutralized with a base, it loses a hydrogen ion from the carboxyl group and produces a carboxylate salt, which is composed of the negative ion of the acid and the positive ion of the base.

Here's the balanced chemical equation: HRCOOH + NaOH → HRCOO⁻Na⁺ + H₂O

The carboxylic acid, therefore, acts as a Bronsted-Lowry acid and the base as a Bronsted-Lowry base.

The salt produced in the reaction can be converted back to the original acid by the addition of a strong acid like HCl, leading to the formation of the acid and the respective salt. The reaction of carboxylic acids with bases is, therefore, a type of neutralization reaction.

When a carboxylic acid reacts with an alcohol in the presence of an acid catalyst, an ester is formed, while a carboxylic acid reacts with another carboxylic acid to form an anhydride.

Hence, the correct option is a carboxylate salt.

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Answer:

anode: magnesium

cathode: nickel

Explanation:

edg. 2021

Answer:

Question says , the height of the student = 4 feet, ... This means, if the student goes for swimming in the pool, however he does not know swimming, he will not be drowned until he is suffering from an injury or external force.

The following statements on HPLC modes are true is more polar compounds elute first in normal-phase HPLC (Option E).

The liquid chromatography (HPLC) is a technique in analytical chemistry employed for the separation, identification, and quantification of elements. It is considered a highly sensitive method, and it works by separating the components in a mixture with the assistance of a solvent under high pressure.

There are two modes of HPLC: Reversed-Phase HPLC (RP-HPLC) and Normal-Phase HPLC (NP-HPLC). In RP-HPLC, a nonpolar stationary phase, such as C18, is used, and polar solvents, such as water, are used as mobile phases. Polar stationary phases, such as silica gel, are used in NP-HPLC, while nonpolar solvents, such as hexane, are used as mobile phases.

More polar compounds have a greater affinity for the polar stationary phase than less polar compounds, which have a higher affinity for the nonpolar mobile phase in NP-HPLC. As a result, less polar compounds elute first in normal-phase HPLC.

Thus, the correct option is E.

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Answer:

There are four types of chemical reactions: synthesis or combination reactions, decomposition reactions, single displacement or replacement reactions, and double displacement or metathesis reactions. Synthesis reactions combine two or more reactants to form a single product, decomposition reactions break down a single reactant into two or more products, single displacement reactions involve an element reacting with a compound to produce a new element and compound, and double displacement reactions involve two compounds exchanging ions to form two new compounds.

Answer:

B,C

Explanation:

#4, answer: a This is because the Earth is spinning towards the east. The Earth spins about its axis, an imaginary line that runs through the middle of the Earth between the North and South poles.

#5 a, answer: c

Answer:

The answer is (A)

Explanation:

When the weather changes, nature also changes because most plants rely on photosynthesis and if they don't get as much light then they can't support as much as they used causing them to shut down parts of the plant.

Answer:

Each names a given number of objects.

Explanation:

Explanation:

The substance(s) to the left of the arrow in a chemical equation are called reactants. A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction

A system of linear equations to balance the following chemical reaction:

Limestone, CaCO₃, neutralizes the acid, H₃ O, in acid rain is:

2H₃O + CaCO₃ → 3H₂O + Ca + CO₂

To balance the chemical equation:

H₃O + CaCO₃ → H₂O + Ca + CO₂

We need to ensure that the number of atoms of each element is the same on both sides of the equation.

Let's assign variables to the coefficients of each compound:

H₃O: x

CaCO₃: y

H₂O: z

Ca: a

CO₂: b

Now, we can set up the system of equations based on the number of atoms for each element:

For hydrogen (H):

3x = 2z

For oxygen (O):

3x + 3y = 2z

For calcium (Ca):

y = a

For carbon (C):

y = b

For calcium (Ca):

a = 1

Solving this system of equations will give us the balanced coefficients. Let's solve it:

From the equation y = a, we have y = 1.

From the equation y = b, we have b = 1.

Substituting b = 1 into the equation 3x + 3y = 2z, we have:

3x + 3 = 2z

From the equation 3x = 2z, we have x = (2/3)z.

Substituting x = (2/3)z into the equation 3x = 2z, we have:

3(2/3)z = 2z

2z = 2z

This equation is true for any value of z, indicating that z can take any value.

Therefore, we can choose z = 3 to simplify the coefficients:

x = (2/3)z = (2/3)(3) = 2

y = 1

z = 3

a = 1

b = 1

Thus, the balanced equation is:

2H₃O + CaCO₃ → 3H₂O + Ca + CO₂

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Explanation:

Atomic number of Silicon..=14

Answer:

14

when liquid (at m.p. ) Silicon is a chemical element with the symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic lustre, and is a tetravalent metalloid and semiconductor.

Explanation:

Hope it is helpful....

Answer:

The force of the atmosphere 200 KN.

Explanation:

Pressure is the ratio of force applied to the area  to which the force is applied.

i.e Pressure = \(\frac{Force}{Area}\)

But, Pressure = 100000 pa (100000 N/ \(m^{2}\)), and surface area = 2.0 \(m^{2}\)

Thus,

100000 = \(\frac{Force}{2.0}\)

⇒ Force = 100000 x 2.0

              = 200000

Force = 200 KN

The force of the atmosphere 200 KN.

1. In order to answer this one and the next one, we will use mass percentage as our guide, since every compound has a mass percentage for each element, and this is found by checking the total mass and the separate masses of each element, for example, MgF2, the mass percentage is 39% for Mg and 61% for F2, this is due to their molar mass, 24g for Mg and 38g for F2

We have 27.1 g of Mg, and this will always correspond for 39% of the total mass of the compound, so we can do the following math:

100% = x

39% = 27.1g

x = 69.5 grams is the total mass of MgF2, now we only have to subtract the value of Mg and then we will have F2

69.5 - 27.1 = 42.4 grams, this is the mass of Fluorine

2. The same step by step from the previous question, 36% of the total mass is Al and 64% is S, but this question has a little difference, now we have the mass of the compound, but the process is very similar

100% = 50.2 grams

64% = x grams

x = 32.1 grams, which can be considered as letter A

Answer:

plasma membrane

Explanation:

Answer:

Ag-107 has an abundance of 51.82% and mass of 106.9 amu

Explanation:

Answer:

Naturally occurring silver ( 47Ag ) is composed of the two stable isotopes 107Ag and 109Ag in almost equal proportions , with 107Ag being slightly more abundant ( 51.839 % natural abundance ) .

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Answer:

See explanation

Explanation:

The reaction between alcohol and acidified potassium dichromate  is a redox reaction. This reaction can be used to detect a drunken driver.

Alcohols can be oxidized to aldehydes, ketones and carboxylic acids depending on the structure of the alcohol. Primary alcohols yield adehydes and carboxylic acids while secondary alcohols are oxidized to ketones.

The colour of the acidified potassium dichromate turns from orange to green when exposed to alcohols from the breath of a drunken driver.

Answer:

it gets cold or warm

Explanation:

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pCO2 is an important factor that affects various aspects of water chemistry and the impacts of ocean acidification. When pCO2 increases, the concentration of total CO2 dissolved in water also increases. This leads to changes in pH, which decreases due to increasing atmospheric CO2 concentration.

When pCO2 rises, the concentration of only CO2 dissolved in water increases. The dissolved CO2 forms carbonic acid, which contributes to the acidification of the ocean. This increase in CO2 affects the equilibrium between CO2, HCO3-, and CO3^2-, shifting it towards higher levels of dissolved CO2 and H+ ions, resulting in a lower pH.

In terms of the impacts of ocean acidification on different organisms, the effects can vary depending on their specific needs. An organism that requires CO2 is likely to fare better under ocean acidification since the increase in dissolved CO2 can provide them with a favorable environment. However, organisms that rely on HCO3- or CO3^2- may fare worse under ocean acidification, as the lower pH interferes with the availability of these carbonate ions, which are essential for shell formation and calcification in some marine organisms.

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Answer:

One with a few kinds is more likely to become unstable.

Explanation:

A lack of biodiversity means there is a lower chance of them having traits that enable them to adapt to a changing environment. A lack of biodiversity is usually caused by humans. It could be the result of habitat loss, invasive species, overexploitation, pollution, or climate change.

Answer:

2.114 atm

Explanation:

Since it is just pressure and volume, use Boyle's Law

P1V1 = P2V2

Then plug in numbers

(1 atm)(1 L) = P2(.473 L)

P2 = 2.114 atm

what are the following things

Metals are good conductors and shows some peculiarities such as luster, ductility, malleability,etc. Brittleness is not associated with metals since they are hard. Hence option A is correct.

Metals are electropositive elements with good conductivity. Metals are classified into the s block and d block of periodic table. Thus alkali metals, alkaline earth metals and transition metals are the classes of metals.

Metals are rich in free electrons thereby, they capable of conducting electrically and thermally. Other features that metals have , they are hard and not brittle. Metals are malleable and ductile.

Malleability is the property by which it can be pressed into different shapes easily without cracking. Ductility means they can be plastically deformed into thin wires without fracture.

Metals are shining and this property is called lustrous. Hence all the properties such malleability, ductility and luster are features of metals but they are not brittle. Hence option A is correct.

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Your question is incomplete. But your complete question probably was:

Which of the following is NOT a property of metals associated with metallic bonds?

A Brittleness

B Malleability

C Ductility

D Luster

Answer:

Its the first one

Explanation:

4 mol is the highest of the Bunch and 4.0L is the lowest making the first answer the correct one

The value of ln(k) at 589 K for the reaction 4 NH₃(g) + 5 O₂ ⇌ 4 NO(g) + 6 H₂O(g) is -3.3.

B. The given information is δG⁰ = -56.5 kJ/mol and the reaction equation is 4 NH₃(g) + 5 O₂ ⇌ 4 NO(g) + 6 H₂O(g). The relation between δG⁰ and equilibrium constant K is given by the equation δG⁰ = -RTlnK, where R is the gas constant and T is the temperature in Kelvin. Thus, we can calculate ln(K) as follows:

ln(K) = -δG⁰/RT

= -(56.5 kJ/mol) / (8.314 J/K·mol × 589 K)

= -0.0033

≈ -3.3 (to one decimal place)

Therefore, the value of ln(K) at 589 K for the given reaction is -3.3.

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the IUPAC nomenclature  name for ch₃ch₂con(ch₃)ch₂ch₃  for five carbon atoms is 2- METH- BUTANE

The International Union of Pure and Applied Chemistry :

The International Union of Pure and Applied Chemistry (IUPAC) is that the world authority on chemical nomenclature, terminology (including the naming of latest elements in the periodic table), standardized methods for measurement, atomic weights and lots of other critically-evaluated data.

What is the IUPAC naming system?

IUPAC nomenclature is predicated on naming a molecule's longest chain of carbons connected by single bonds, whether during a continuous chain or in a ring. All deviations, either multiple bonds or atoms aside from carbon and hydrogen, are indicated by prefixes or suffixes consistent with a specific set of priorities

What is IUPAC and its function?

The International Union of Pure and Applied Chemistry (IUPAC) is that the world authority on chemical nomenclature and terminology, including the naming of latest elements in the periodic table; on standardized methods for measurement; and on atomic weights, and lots of other critically-evaluated data.

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because all students really need to have so may papers

Answer:

paper we get from trees in which we write even many knowledge and valuable things are written in paper which is of tree only.

food is necessary for human being to live stain live. it is because of food only.

wood is needed during the winter to keep ourselves warm it is also needed in cooking food at many villages and towns. and the main thing coal by which we get electricity is also made from wood only.