Please balance the equation, putting the correct coefficient in each box.

Do not leave any boxes blank! Enter "1" for formulas having a presumed

coefficient of 1.

Bi(OH)3 +

HNO3 →

H2O +

Bi(NO3)3

It is significant to remember that the order of a reaction affects how a reaction's half-life is calculated. It is commonly expressed in seconds and is represented by the sign "t 1/2." The amount which is left after 172.8 years is 0.8 g.

The time it takes for the concentration of a particular reactant to reach 50% of its initial concentration, or the time it takes for the reactant concentration to reach half of its initial value, is known as the half-life of a chemical reaction.

To calculate the remaining amount:

N₀ / N = 2ⁿ

n = time / t1/2

172.8 / 57.6 = 3

N = 2ⁿ / N₀

N = 2³ / 10 = 0.8 g

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Answer:  According to the Arrhenius concept, an acid is a substance that  causes an increase in the concentration of H in aqueous solutions

Explanation:

According to the Arrhenius concept, an acid is a substance that ionizes in the water to give hydronium ion or hydrogen ion and a bases is a substance that ionizes in the water to give hydroxide ion .

\(HA(aq)\rightarrow H^+(aq)+A^-(aq)\)

\(BOH(aq)\rightarrow B^+(aq)+OH^-(aq)\)

According to lewis concept , an acid is a substance that accepts electrons and a base is a substance that can donate electrons.

An example of human intervention in the genes is; humans breed dogs to be smaller and more friendly. Option A

We know that the gene is the unit of inheritance that can be found in the chromosome of the organism. The genes that the organism does have is what would tell must the observed traits of the organism and this is called the phenotype of the organism.

We know that human's do have an impact with the fact that the genes can spread in an organism. In many cases, we can see the alteration of the genes when we deal with the genetic make up of the pets.

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Answer:

The answer is A. Aquifer

Explanation:

It stores groundwater.

Answer:

The answer is Conduction

Explanation:

Conduction is the process of heat being transferred between objects through direct contact, and it's the most common type of heat transfer.

Answer:

The answer is Conduction

Explanation:

Conduction is the process of heat being transferred between objects through direct contact, and it's the most common type of heat transfer.

I hope this helps!

1) Find moles of oxygen (02)

2 molecules of water (H2O) contain 1

molecule of oxygen (02).

We can also say 2 mol of water (H20)

contains 1 mol of oxygen (02).

molesofO2 =6.7molH20.
1molof O2\ 2 molo of H2 O = 3.35molofO?

Answer:

A salt that is dissolved in water is called a solute

Once you have dissolved the salt - you have a solution

The water is called the solvent

Explanation:

We have that When salt dissolves completely into water the water is called a Solvent

it is important to not that once the salt compound comes into water it breaks down the molecule apart the Na on one hand and the Cl on the other hand

Once the NaCl is dissolved in to the H_2O it is known as a solute of salt

And when When salt dissolves completely into water the water is called a Solvent

Therefore

When salt dissolves completely into water the water is called a Solvent

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Answer:

A) a north pole and a south pole

Explanation:

As, a magnet will have a north pole in one of its end and a south pole in the other

We can see here that one use of ethanol based on its volatile nature is as a fuel additive.

Ethanol, also known as ethyl alcohol or grain alcohol, is a volatile, colorless liquid that belongs to the alcohol chemical group. It is produced through the fermentation of sugars by yeast or other microorganisms. Ethanol has a wide range of applications, including industrial, fuel, and recreational uses.

Ethanol is a renewable resource that can be used to replace gasoline in some applications. It is also less polluting than gasoline, and it can help to reduce greenhouse gas emissions.

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Answer: A. A bond in which molecules share electrons

Answer:

A

Explanation:

I just know it because i am smart, trust me I know this is correct.

a i think if i am wrong i am truly sorry but i dont think i am wrong

Answer:

T = 136.5K

Explanation:

Answer:

12 mi/h

Explanation:

Step 1: Given data

Step 2: Convert "d" to miles

We will use the conversion factor 1 mi = 1.60934 km.

6 km × 1 mi/1.60934 km = 3.7 mi

Step 3: Convert "t" to hours

We will use the conversion factor 1 h = 60 min.

19 min × 1 h/60 min = 0.32 h

Step 4: Calculate the average speed of the runner (s)

The speed is equal to the quotient between the total distance and the time elapsed.

s = d/t

s = 3.7 mi/0.32 h = 12 mi/h

The answer, when rounded to the nearest whole quantity, is 192 grammes of lithium hydroxide.

The atomic mass in g/mol is the element's typical molar mass. The atomic mass in amu can also be used to compute molar mass by multiplying it by the molar mass constant (1 g/mol). Add together all the atomic masses of the constituent atoms to determine the molar mass of a compound with numerous atoms.

Li2SO4 + 2 H2O = 2 LiOH + H2SO4

According to the equation, 1 mole of lithium sulphate is created when 2 moles of lithium hydroxide react. Hence, the following is required to make 4.02 moles of lithium sulphate:

(2/1) x 4.02 moles = 8.04 moles of lithium hydroxide

Lithium hydroxide has a molar mass, which can be used to convert moles to grammes.

LiOH: (6.941 g/mol) + (15.999 g/mol) + (1.008 g/mol) = 23.948 g/mol

Thus, 4.02 moles of lithium sulphate must be produced from a quantity of lithium hydroxide equal to:

8.04 moles x 23.948 g/mol ≈ 192 g

The answer, when rounded to the nearest whole quantity, is 192 grammes of lithium hydroxide.

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Answer:

Explanation:

The protein comprises of two 60-kD polypeptides and two 40-kD polypeptides. Each one of the 40-kD chains has a disulfide-bond, which is directly bonded to a 60-kD chain.

The 100-kD units attach noncovalently to produce a protein with a molecular mass of 200 kD.

The protein consists of 200 kD in size, and the Gel filtration doesn't affect the relationship and interaction among the various subunits in the protein.

When SDS-PAGE takes place, samples are being subjected to boiling of samples and therefore undergoing denaturation conditions. The result causes disorganization in the 100 kD units.

It implies that BME is responsible for the reduction between the R1-S-S-R2 bond between 40 kD and 60 kD to R1-SH and R2-SH, resulting in separate proteins.

However, the reducing agent (BME) main task is reducing disulfide bonds in a protein.

The volume of concentrated acid that must be added to obtain a total volume of 50ml is = 0.967ml.

An acid is defined as the substance that is capable of donating it's hydrogen ion as the only positive ion in a chemical reaction.

The concentration of stock solution (M¹) = 6.00M.

The concentration of dilution that is needed (M²) = 0.116M.

The volume of the dilution to be used (V²) = 50.0 ML.

The volume of the stock solution to be used (V¹) = xML.

Using the formula;

M¹V¹= M²V²

Make V¹ = M²V²/M¹

V¹= 0.116 × 50/ 6

V¹= 5.8/6

V¹= 0.967ml

Therefore, the amount of concentrated acid (which is the stock solution) that would be used for dilution= 0.967ml.

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Answer:

The solution is 0.450 M. How many mL are needed?

- 0.667 mL

Explanation:

Explanation:

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Answer:

Matter can change from one state to another if heated or cooled. If ice (a solid) is heated it changes to water (a liquid). This change is called MELTING. If water is heated, it changes to steam (a gas).

Explanation:

HTML5 has included particular components to structure websites. If you want to incorporate content that is directly connected to the topic of the document, use the <nav> structure element.

In chemistry, an element is a pure substance made up of atoms that have the same number of protons in their nuclei. Each element is identified by its atomic number, which represents the number of protons in the nucleus. Elements are the building blocks of matter, and they cannot be broken down into simpler substances by ordinary chemical reactions. The periodic table of elements organizes all known elements based on their properties and atomic structure. There are currently 118 known elements, each with its own unique properties and uses. Understanding the properties and behavior of elements is essential to understanding the behavior of matter and the chemical reactions that occur in the natural world and in industry.

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Answer:

F = ma, where F is the force acting on the body, m is the mass of the body, and a is the acceleration of the body. Therefore, the force acting on the ball is 4Newtons.

Explanation:

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Although caffeine (a stimulant found in coffee and tea) is a relatively complicated molecule, it's only eight atoms of carbon, ten of hydrogen, four of nitrogen and two of oxygen – C8H10N4O2. This kind of representation is called a molecular formula – it tells us what kind of atoms we have, and how many of each.

There are 10 hydrogen atoms in one mole of caffeine.

Caffeine belongs to the methylxanthine category of nervous system stimulants. It's just a cognitive booster that improves alertness but also attentional performance.

Caffeine's chemical formula would be C8H10N4O2, that indicates it contains eight carbon atoms, ten hydrogen atoms, four nitrogen atoms, and two oxygen atoms.

So it can be seen that , 10 hydrogen resent in caffeine molecule.

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Answer:

0.00500M of Na₂C₂O₄

Explanation:

When are dissolved in 150 mL of 1.0 M H2SO4.

We can solve this problem finding molarity of sodium oxalate: That is, moles of Na2C2O4 per liter of solution. Thus, we need to convert the 0.1005g to moles using molar mass of sodium oxalate (134g/mol) and dividing in the 0.150L of the solution:

0.1005g * (1mol / 134g) = 7.5x10⁻⁴ moles of Na₂C₂O₄

In 0.150L:

7.5x10⁻⁴ moles of Na₂C₂O₄ / 0.150L =

The concentration of the solution is 0.005 M.

From the information available in the question;

We know that;

Mass of  Na2C2O4 = 0.1005 g

Volume of solution = 150 ml

To obtain the number of moles of Na2C2O4;

Number of moles = mass/molar mass

Molar mass of Na2C2O4  = 134 g/mol

Number of moles =  0.1005 g /134 g/mol = 0.00075 moles

Concentration = number of moles/volume

Volume of solution = 150ml or 0.15 L

Concentration =  0.00075 moles/0.15 L

= 0.005 M

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Missing parts

An acidic solution of sodium oxalate (Na2C2O4) was prepared by dissolving ~0.100 g of Na2C2O4 in 150 mL of 1.0 M H2SO4 in a 250 mL Erlenmeyer flask. Calculate the concentration of the resulting sodium oxalate solution if 0.1005 g of Na2C2O4 was used.

Ionic bonds are bonds that occur due to the handover of electrons to form positive ions and negative ions whose electron configuration is the same as that of the noble gasses.

Chemical bonds are the forces that hold atoms in elements and compounds together. Chemical bonds can occur with several types of bonds.

Based on the electron configuration that occurs in bond formation, chemical bonds are divided into 4 types:

1. Ionic or electrovalent bonds

This bond occurs because of the electrostatic attraction between positive ions and negative ions in a chemical compound

2. Covalent bonds

Covalent bonds occur when the sharing of electron pairs from each of the bonding atoms.

3. Coordinate covalent bond

Coordinate covalent bond is a bond that uses a shared pair of electrons, but the electrons only come from one of the atoms.

4. Metallic bond

This bond is formed due to the attractive force of the metal atomic nucleus with a sea of electrons.

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Chemical energy is first transformed into heat in a combustion engine to induce a fluid's expansion, which subsequently results in motion. The chemical energy released by adenosine triphosphate (ATP) hydrolysis cannot be directly converted into meaningful mechanical labor, but motor proteins can.

Chemical energy is the energy that is released when chemical substances engage in a chemical reaction and change into other substances. Batteries, food, and gas are a few examples of chemical energy storage mediums.

Chemical energy is the form of energy held within the fuel. A car's engine operates by burning fuel. The fuel is burned, creating mechanical energy that moves the vehicle. The engine thus transforms chemical energy into mechanical energy.

Your body can move your muscles when you ingest food, allowing you to breathe, walk, run, leap, lift objects, and perform all the other activities necessary for survival.

Thus, The chemical energy released by adenosine triphosphate (ATP) hydrolysis cannot be directly converted into meaningful mechanical labor.

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The original substance has undergone a transformation into a new substance with different properties, indicating a change in the chemical composition of the material.

An example of a change in substance is the process of combustion. When a substance, such as wood, is burned, it undergoes a chemical reaction with oxygen in the air, which produces a new substance: carbon dioxide gas, water vapor, and ash. This change in the chemical composition of the wood means that it has transformed into a completely new substance with different physical and chemical properties.

Another example is the process of electrolysis, where an electric current is passed through a solution containing ions. This can cause a chemical reaction to occur, resulting in the breakdown of the original substance into its component parts or the formation of a new substance.

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The periodicity and patterns displayed by the earlier versions of the periodic table played a critical role in driving the discovery of new elements, and the periodic table remains an essential tool for organizing and understanding the properties of the known elements today.

The chemical elements are arranged in rows and columns in the periodic table, sometimes referred to as the periodic table of the elements.

The Russian chemist Dmitri Mendeleev's periodic table, which he developed in 1869 and which established the periodic law as the dependence of chemical properties on atomic mass, was the first to be widely acknowledged.

Mendeleev's periodic table had gaps because not all elements were known at the time; however, he was able to forecast some of the missing elements' properties using the periodic law.

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Answer:

Protons, Atomic number

Answer:

\(\boxed {\boxed {\sf 63.0 \%}}\)

Explanation:

The percent yield is the ratio of the actual yield to the theoretical yield.

\(percent \ yield = \frac{actual \ yield}{theoretical \ yield} * 100\)

We can substitute the known values into the formula.

\(percent \ yield= \frac{ 14.8 \ g}{23.5 \ g}*100\)

Divide.

\(percent \ yield = 0.629787234043*100\)

Multiply.

\(percent \ yield = 62.9787234043\)

The original measurements for the theoretical and actual yields have 3 significant figures, so our answer must have the same. For the number we calculated, that is the tenths place.

The 7 to the right, in the hundredths place, tells us to round the 9 up to a 0. Since we rounded up to 0, we have to move to the next place to the left and round the 2 up to a 3.

\(percent \ yield \approx 63.0\)

The percent yield is approximately 63.0 percent.