determine the amount of time it takes for 3/4 of a radioactive sample of an isotope of bromine to decay. The half-life of the isotope is 16.5 hours.

Answer:

To determine the volume of the solution in milliliters, we need to know the mass of CuNO3 and the concentration of the solution.

Given that 3.38g of CuNO3 is dissolved in water to make a 0.220 M solution, we can use the following formula to calculate the volume of the solution:

Volume = (Mass of CuNO3) / (Concentration of solution)

Plugging in the given values, we have:

Volume = (3.38 g) / (0.220 M)

Converting the mass to grams and the concentration to moles/liter, we have:

Volume = (3.38 g) / (0.220 mol/L)

Calculating, we find that the volume of the solution is approximately 15.36 liters.

To convert the volume to milliliters, we can multiply the volume in liters by 1000. In this case, the volume in milliliters is 15,360 ml.

Therefore, the volume of the solution in milliliters is approximately 15,360 ml.

Explanation:

Answer:

The number of moles of water in 100 g of vinegar is 0.47 moles.

Explanation:

Answer:

Correct option is C)

Kinetic Energy at 20

o

C=293K

=3/2K

B

​

T=3/2K

B

​

(293)J=K.E

1

​

kE

2

​

=2K.E

1

​

2

2

3

​

K

^

B

​

(293)=

2

3

​

K

^

B

​

T

T=586K

=313

o

C

When the conductivity is at a minimum, the true thing about the amount of Ba(OH)₂ is that the amount of the two reactants are the same when conductivity is low.

The ability of an aqueous solution to carry an electric current is measured by its conductivity. Ionic strength is measured by conductivity monitors. In automated chromatography systems, conductivity is the main input control parameter used to enable the generation of salt gradients or to control buffer dilution or in-line buffer preparation.

Conductivity monitors can be used to automate and monitor cleaning and equilibration procedures. It's important to remember that temperature affects measurements of conductivity and pH.

When conductivity is low, the amounts of the two reactants are equal. Between the reactants, there are no excesses. The aqueous solution cannot dissolve the precipitate BaSO₄. Since there are no ions, the conductivity is at its lowest.

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Complete question

The Ba(OH)₂ dissociates as Ba+2 + 2 OH-. H₂SO₄ dissociates as 2 H+ + SO₄-2. When the conductivity is at a minimum, what must be true about the amount of Ba(OH)₂ compared to H₂SO₄

The mass of copper nitrate produced in the reaction 3.65g of copper and 5.16g of nitric acid​ is 3.84g.

Nitric acid reacts with copper

4 HNO3(l) + Cu(s) ==> Cu(NO3)2(s and aq) + 2 NO2(g) + 2 H2O(l)

Deep blue colour characterises the copper nitrate salt that develops. Nitrogen dioxide is the gas that is created when strong nitric acid and copper interact. This maroon mist is nitrogen dioxide.

Copper :

=> mass copper nitrate

=> 3.65g Cu x 1mol of Cu/63.546 g Cu x 1 mol copper nitrate / 1 mol cu x 187.56 g/mol copper nitrate

=> 10.77g

HNO3 (Nitric acid):

=> Mass copper nitrate =3.65 g HNO3 X 1 mol HNO3/63.546 g HNO3 x 1mol of copper nitrate /4 mol HNO3 x 187.56 g/mol copper nitrate.

=> 3.84g.

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The mass of the compound is calculated by freezing point depression formula which is ΔTf=Kf×W₂×1000/M₂×W₁ which is equal to 3125 g.

Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.

Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.

Freezing point depression is calculated by the formula, ΔTf=Kf×W₂×1000/M₂×W₁ .Therefore,W₁=5.12×75×1000/0.48×256=3125 g.

Thus, mass of compound is 3125 g.

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The depression in freezing point of the electrolyte is 1.6 K. The weight of the solute added is 29.5 g. Then the molar mass of the compound is obtained to be 342.93 g/mol.

Addition of a non-volatile solute into a solvent decreases the freezing point of the solution. The depression in freezing point is calculated as follows:

ΔT =  W₂ 1000 Kf / (M W₁)

where W₂ be the mass of solute and W₁ is that of solvent, Kf is called molal depression constant. M be the molar mass of the solute.

Given ΔT = 1.6 K

W₂  = 29.5 g

W₁ = 100 g

Kf of water = 1.86 K/m

Then M = W₂ 1000 Kf / ( ΔT W₁)

M = 29.5 g× 1000 × 1.86 / (1.6 K × 100 g) = 342.9 g/mol

Thus, the molar mass of the solute is 342.9 g/mol.

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The VSEPR drawing for the compounds in the question are shown in the images attached.

We have to know that according to the valence shell electron pair repulsion theory, the structure of the molecule can be found by looking at the number of electron pairs that surround the central atom in the molecule.

Now the structure of the compounds as we can see in the images that ahve been attached are based on the Vlence Shell electron pair repulsion drawing for each of the compounds that we have mentioned in the question.

We can see that the structure of the compound must have a central atom and then the other atoms in the molecule are arranged around the central atom of the molecule.

The molecule would have a definite shape that is based on the number of electron shells in the molecule.

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Functional group can be interconverted into each their by the means of suitable reagent. Functional group are responsible for the chemical and physical properties of a compound. Therefore in the below given ways compound can bee classified.

A group of atoms forming a component of a molecule that accounts for a particular function or chemical behavior is called a functional group. There are so many functional group in organic chemistry.

first compound--------  secondary (2°)

second compound--------------  secondary (2°)

third compound-------------------- tertiary (3°)

fourth compound ----------------primary (1°)

fifth compound---------------primary (1°)

Therefore in the above given ways compound can bee classified.

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They are distinct Similarity: Compared to crustal rocks, mantle rocks have higher concentrations of magnesium and iron. The deep mantle's rocks are under extreme pressure and heat.

Earth's interior is made up primarily of the mantle, which is solid. Between the thin crust at the surface of the planet and its dense, extremely hot core is the mantle. A staggering 84% of the volume of the Earth is made up of the mantle, which is around 2,900 kilometers 1,802 miles thick.

The thickest layer on Earth measures just under 3,000 kilometers 1,865 miles. The beginning is only 18.6 miles 30 kilometers below the surface. It is thick, heated, and semi-solid like caramel candy, mostly made of iron, magnesium, and silicon. It circulates, much like the layer beneath it.

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The functional group of molecules as follows :

Molecule 1. is aldehyde and ketone, Molecule 2 is acid and thio, Molecule 3 is acid and amide, Molecule 4 is alcohol and ether, Molecule 5 is Alcohol and acid. The image attached below show the functional group and molecules are labeled.

The polar compounds are those compound having different positive and negative charge, therefore the bonding with atoms such as nitrogen, oxygen, or sulfur.

A buffer is a solution the can control the pH change along with the addition of an acidic or basic substance. It is able to neutralize small amounts of added acid or base, So it maintains the pH of the solution. This is important to maintain pH ranges.

Thus, Molecule 1. is aldehyde and ketone, Molecule 2 is acid and thio, Molecule 3 is acid and amide, Molecule 4 is alcohol and ether, Molecule 5 is Alcohol and acid.

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The volume of the metal block can be calculated using the density and mass of the block is 30.0 cm³

A metal block is a solid piece of metal that is typically used for machining and other industrial applications. It is usually made from aluminum, steel, or other metals, and can be machined into a variety of shapes and sizes depending on the application. Metal blocks are also used for casting, forging, and other manufacturing processes. Metal blocks may also be used for decorative purposes, such as sculpture or engraving. They are also used in jewelry making and engraving, as well as in medical and dental applications.

The volume of the metal block can be calculated using the density and mass of the block:
Volume = Mass/Density = 223.1 g/7.41 g/cm³ = 30.0 cm³
Since the metal block was submerged in the water, the volume of the block will be added to the volume of water in the beaker. Therefore, the original water level in the beaker can be calculated using the following equation:
Original Water Level = 150 mL + (30.0 cm³/1000 cm³/mL) = 180.0 mL

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Answer:

40.10 atm. is answer i think ....

Troposphere atmosphere layer does this process happen The acidity of rainwater comes from the natural presence of three substances (CO2, NO, and SO2) found in the troposphere

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The limiting reactant would be calcium and the amount of product that can be made would be 7.14 grams.

Calcium reacts with oxygen to form calcium oxide according to the following balanced equation:

[tex]2Ca + O_2 --- > 2CaO[/tex]

In other words, the mole ratio of Ca to O is 2:1.

Mole of 35.1 g Ca = 35.1/40 = 0.1275

Mole of 37.1 g O = 37.1/16 = 2.3188

This means that oxygen is in excess while Ca is the limiting reagent.

The mole ratio of Ca to CaO is 1:1, thus the equivalent amount of CaO that will be produced will also be 0.1275 moles.

Mass of 0.1275 moles CaO = 0.1275 x 56 = 7.14 grams

In other words, the limiting reactant of the reaction is calcium while the amount of the product that can be made is 7.14 grams.

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Long-term (months or years) high blood sugar levels can cause irreversible harm to organs such the kidneys, blood vessels, eyes, nerves, and nervous system. Speak with your doctor or the diabetes care team if you frequently have hyperglycemia.

If left untreated, having excessive blood sugar levels for an extended length of time might lead to major health issues. In addition to raising the risk of heart disease, stroke, kidney illness, vision issues, and nerve issues, hyperglycemia can harm the blood arteries that provide blood to essential organs.

A high-fat, high-calorie, and high-cholesterol diet

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Answer: A balanced chemical reaction is A balanced chemical equation where the number of atoms of each type in the response is the same on both reactants and product sides.

Explanation: Burning, and cooking are 2 examples.

If the volume of the balloon was 4.21L when the temperature was 25.0°C, 8.42L will be the volume of the balloon be when the temperature is 50.0°C. if Mass and pressure is constant.

Hence, in the above case it is shown that temperature is rising twice of its original value so, the volume of that given mass of gas in the balloon will also increase by twice.

Solution:

4.21L=25.0°C

4.21L×2=50.0°C

8.42L=50.0°C

8.42L will be the volume of the balloon be when the temperature is 50.0°C.

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There is a golden rule of solubility, non polar solute dissolve in non polar solvent and polar solute dissolve in polar solvent. Therefore, the correct option is option B.

Solution is a homogeneous mixture of two or more than two substances. A solution is a homogeneous mixture of solute and solvent molecules. Solvent is a substance that is in large amount in solution. solute is the substance which is in small amount in a solution.

There are two types of mixture that is homogeneous and heterogeneous. Solution is a homogeneous solution. The nature of solvent tells about whether the solvent is in liquid, solid or gas form.

Let amount of 30% to mix, be X

Then amount of 18% to mix = 300 - X

0.3X + 0.18(300 - X) = 0.21(300)

0.3X+ 0.18(300) - 0.18X= 0.21(300)

0.3X - 0.18X =0 .21(300) -0 .18(300)

0.12X =0 .03(300)

X=75L

Therefore, the correct option is option B.

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Explanation:

This hot material rises to an area of lower pressure through the process of convection. Areas of lower pressure always have a lower melting point than areas of high pressure. This reduction in overlying pressure, or decompression, enables the mantle rock to melt and form magma.

Answer:

The ion-electron method involves breaking the reactants into their component ions and transferring electrons between the ions to balance the charge and the atoms. In a basic solution, the S²⁰⁸² ion will gain two electrons to form SO₂. The I¹⁻ ion will lose one electron to form I³⁻. The balanced redox equation using the ion-electron method is:

S²⁰⁸² + 2e⁻ + 2OH⁻ → SO₂ + H₂O

I¹⁻ + e⁻ → I³⁻

The overall balanced equation is:

2S²⁰⁸² + 2OH⁻ + I¹⁻ → 2I³⁻ + SO₂ + H₂O

Answer:

The answer is the last one only.

Explanation:

Light/sun gives energy and growth which makes the plants leaves/plant grow bigger.

Explanation:

Without the sun, plants wouldn't get the food that's needed to grow, reproduce and survive. plants need sunlight, water and carbon dioxide to live.

The pH value of 500 mL of an aqueous solution of 0.005 mole HCl is 2

We'll begin our calculations by obtaining the molarity of the solution. Details below:

Molarity = mole / volume

Molarity = 0.005 / 0.50

Molarity = 0.01 M

Next, we shall obtain the concentration of the hydrogen ion, H⁺ in the solution. Details below:

HCl(aq) <=> H⁺(aq) + Cl¯(aq)

From the balanced equation above,

1 mole of HCl contains 1 mole of H⁺

Therefore,

0.01 M HCl will also contain 0.01 M H⁺

Thus, the concentration of the hydrogen ion, H⁺ in the solution is 0.01 M

Finally, we shall determine the pH of the solution. Details below:

pH = -Log H⁺

pH = -Log 0.01

pH = 2

Thus, we can conclude that the pH of the solution is 2

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Answer:

A glove is like the earth because...

A globe is like the earth in that it is a three-dimensional representation of the earth's features, such as countries, oceans, and landmasses.

A globe is also like the earth in that it can rotate on its axis, which allows the viewer to see different parts of the earth depending on the angle of rotation.

A globe is not like the earth because...

A globe is not like the earth in that it is typically much smaller than the earth.

A globe is also not like the earth in that it does not depict the earth's relief features, such as mountains and valleys, in their true proportion to the rest of the earth's surface.

A globe is like the earth in that it is a scaled-down, spherical model of the earth's surface, representing physical features accurately. However, a globe is not like the earth because it is much smaller and does not rotate or revolve.

The globe and the earth are similar in two main ways. First, a globe is a scaled-down model of the earth, showing an accurate representation of the earth's surface. This includes physical features such as continents, oceans, and countries, which are mapped out precisely. Second, a globe is spherical, just like the earth.

However, there are differences between a globe and the earth. One key difference is the scale: the earth is far larger than any globe. The most obvious point of difference is the size: while a globe is small enough to be held in your hands or placed on a desk, the earth has a diameter of approximately 7,917.5 miles. Also, the globe is a static object, it does not rotate on its axis or revolve around the sun like the earth does.

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Answer:

Explanation:

In basic solution (pH = 11), an amino acid typically exists in its zwitterionic form. This means that the amino acid has both a positive and a negative charge, due to the presence of both a basic amino group (-NH2) and an acidic carboxyl group (-COOH).

The structure of an amino acid in basic solution (pH = 11) can be represented as follows:

The central carbon atom (also known as the alpha carbon) is bonded to a hydrogen atom, an amino group (-NH2), a carboxyl group (-COOH), and a side chain R group.

The amino group is positively charged due to the loss of a proton (H+).

The carboxyl group is negatively charged due to the gain of a proton (H+).

Overall, the amino acid has a net charge of zero, due to the equal and opposite charges of the amino and carboxyl groups. This is known as the zwitterionic form of the amino acid.

Here is a visual representation of the structure of an amino acid in basic solution (pH = 11):

H |

N-C-COOH

|

R

Regenerate response

Answer:

9 times Avogadro's number, because there are a total of 9 oxygen atoms in the copper sulfate hydrate being considered: 4 from the sulfate

Explanation:

In solid carbon dioxide (dry ice), the particles are held together by strong covalent bonds, so they do not move around much.

What is the carbon dioxide?

Carbon dioxide (CO2) is an odorless, colorless gas created through natural processes such as respiration, combustion and the breakdown of organic materials. As a greenhouse gas, it is a major component of the Earth’s atmosphere and plays a critical role in regulating the global climate. Carbon dioxide is made up of one carbon atom and two oxygen atoms, and is produced when fossil fuels such as coal and oil are burned. Plants and trees also use carbon dioxide as part of their photosynthesis process. Carbon dioxide is essential for life on Earth, however, too much of it can have a negative impact on our planet. As human activity has increased over the past century, so too has our production of CO2, resulting in higher concentrations of this gas in the atmosphere and contributing to global warming.

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Answer:

The last one.

Explanation:

The other ones add more force or give the same but the last one reduces it.