Please answer my question.

A brewed black tea generally has 81.30 milligrams of TA per 100 mL of water (which is to say it is at equilibrium). If a tea bag is steeped in 150. mL of water, 54.2 is the concentration of TA at equilibrium.

A substance's concentration is the amount of solute present in a given amount of solution. Molarity is the number of moles of solute in one liter of solution and is used to express concentrations.

Given:

M₁ = 81.30 milligrams

M₂ = ?

V₁ = 100ml

V₂ = 150ml

M₁V₁ = M₂V₂

By substituting given values in this equation and we get,

81.30 × 100 = M₂ × 150

M₂ = 81.30 × 100 / 150

= 54.2

Thus,  54.2 is the concentration of TA at equilibrium.

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The sample of water is impure because the boiling point is above 100°C.

Boiling point is the temperature at which a liquid boils, with the vapor pressure equal to the given external pressure.

The boiling point of pure water is 100 °C or 212 °F at 1 atmosphere of pressure (sea level).

The boiling point of water also depends on the purity of the water. Water that contains impurities (such as salted water) boils at a higher temperature than pure water. This phenomenon is called boiling point elevation.

According to this question, a sample of water boils at 103°C, hence, the water is impure.

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Answer:

no one can really be sure who was the very first human in america, but the Clovis people were the 1st type of people to populate the US. If you meant the person who founded america then Christopher Columbus would be your answer.

Also, not part of the answer, but this is marked in chem? not sure its supposed to be.

Answer:

When 2 moles of ammonia (NH3) decomposes into nitrogen gas (N2) and hydrogen gas (H2), the balanced chemical equation for the reaction is:

2 NH3 -> N2 + 3 H2

Therefore, 3 moles of hydrogen gas (H2) are produced for every 2 moles of ammonia (NH3) that decomposes.

2.13 pm in metre is 2.13 ×  10⁻¹²m. Unit conversion is a multi-step procedure that involves adding, subtracting, multiplying, or dividing.

Unit conversion is a multi-step procedure that involves adding, subtracting, multiplying, or dividing by a conversion factor. Additionally, rounding and choosing the appropriate number of important digits may be necessary during the procedure. To measure various characteristics, several units of conversion were utilized.

To better comprehend, we convert measurement units in mathematics. For ease of understanding, the height of a tabletop is in inches, but the width of a garden was measured in yards.

2.13 pm to meters

1pm = 10⁻¹²m

2.13 pm ×  10⁻¹²m= 2.13 ×  10⁻¹²m

Therefore, 2.13 pm in metre is 2.13 ×  10⁻¹²m.

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The vapor density of the gas X is 8.

A gas diffuses by the random movement of its particles. In a container of gas, the individual gas particles are constantly moving in random directions and colliding with each other and the walls of the container. This random motion causes the particles to spread out evenly, leading to diffusion.

From the Graham's law; we have that;

R1/R2 = √M2/M1

2/1 = √M2/4

4/1 = M2/4

16 = M2

The vapor density of the gas X is 0.5 * 16 = 8

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Answer: Increase Resistance- lenght of conductor, Decrease resistance- Utilize a conductor with a larger cross-section, Decrease Resistance- Cool the conductor to lower its temperature

Explanation:

The resistance of an electric current can increase or decrease depending on the material it's passing through, the length of its path, its cross-sectional area, and the temperature. Lower resistances are found in metals like copper or aluminum, or in paths with a larger cross-sectional area. Higher resistances are found in materials like rubber or glass, in longer paths, or at higher temperatures.

There are several factors that can increase or decrease the resistance of an electric current passing through a body. These could include:

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The average density is 0.954 g/ mL

The mean or average density is the total mass of a region divided by the entire volume of that region. Calculating the average density of a mixture involves multiplying the densities of each compound by its volume, then dividing the result by the sum of all the volumes.

The mass of the object divided by its volume is referred to as the average or "mean" density. For mass, we'll use grams (g), and for volume, we'll use cubic centimeters (cm³).

Average density = density ₁ +density ₂

                           number of density

Average density = 0.954 g/ml +0.954 g/ml

                                              2

Average density = 0.954 g/mL

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The mass of the gold is   3.34 x 10^4 grams.

Density is a measure of mass per unit volume of a substance or object. It is expressed in units such as kilograms per cubic meter (kg/m^3) or grams per cubic centimeter (g/cm^3).

We have the following from the question;

Length of the side of the cube = 12.00 cm

Density of the gold =  19.3 g/cm³

Volume of the gold = l^3 = (12)^3 = 1728cm^3

Mass of the gold = Volume * density of the gold

=  1728cm^3 * 19.3 g/cm³

=  3.34 x 10^4 grams

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Strong oxidizer potassium nitrate, or KNO3, is a crystal salt that is employed in fertilizer, medicine, and the production of gunpowder. The artificial nitrates salt of potassium is called potassium nitrate.

The K factor, also known as the viral coefficient, calculates how many additional users a single new user contributes to your lifetime total. If a SaaS company's software is good, its customers will recommend it to other friends, teams, and businesses.

Because more energy is needed to separate the potassium potassium ions or nitrate anions from one another in solids than is released whenever these ions are hydrated, this occurs. It is therefore an endothermic process.

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The skeletal equation is:

NaHCO3

Na2CO3 + H2O + CO2 • To equalize sodium, multiply NaHCO3 by 2 2NaHCO3 - Na2CO3 + H2O + CO2

The equation is balanced.

The pressure of hydrogen gas formed in mmHg is 633.5mmHg.

In physics, pressure is the magnitude of the force acting per unit area of surface or area of pressure. This phenomenon arises as a result of the compressive force acting on an object per unit surface area in a perpendicular direction.

A pressure will depend on the magnitude of the force. The amount of pressure generated is in line with the amount of force exerted or directly proportional to the force. On the one hand, pressure is inversely proportional to surface area. If the surface area of the compressive field is enlarged, then the pressure will decrease.

The international unit of pressure is Newton per meter squared or N/m2. Meanwhile, the amount of pressure is symbolized by the letter P or p. Besides N/m2, pressure has another unit of measurement, namely Pascal (Pa), which is taken from the name of the French physicist, Blaise Pascal.

Based on question above, the calculation is:

Pressure of hydrogen gas = total pressure - vapor pressure of water

Vapor pressure of water at 19°C = 16.5 mmHg

Hydrogen gas pressure = 650.0mmHg to 16.5mmHg = 633.5mmHg

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In order to provide for our basic needs of food, clothing, shelter, health, energy, and pure air, water, and soil, chemistry is crucial.

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Based on the comparison between the properties of the unknown elements and those of known elements, the elements are alkali metals.

The unknown elements are sodium and potassium.

Alkali metals exhibit metal properties such as strong thermal and electrical conductivity, luster, ductility, and malleability. In the outermost shell of each atom of an alkali metal, there is just one electron. Compared to those in inner shells, this valence electron is significantly more loosely bonded.

Other properties of the alkali earth metals are:

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Explanation:

Not enough information man

Answer:

The balanced chemical equation for the reaction between sodium bicarbonate (NaHCO3) and citric acid (H3C6H5O7) is:

NaHCO3 + H3C6H5O7 -> CO2 + H2O + Na2C6H5O7

Explanation:

In this reaction, sodium bicarbonate and citric acid react to form carbon dioxide (CO2), water (H2O), and sodium citrate (Na2C6H5O7). The coefficients in front of each substance indicate the relative number of moles of that substance involved in the reaction. In this case, the coefficients are already balanced, meaning that there are equal numbers of atoms of each element on both sides of the equation.

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Answer:- density = 13.41 g/ml

Density (d) of a substance is the mass (m) occupied by it in a given volume (v).

Density mass/volume =

i.e. d = m/v

m = (d) v -----(1)

The given equation from the plot of weight vs volume is :

y = 13.41 x ---- (2)

Based on equations (1) and (2) we can deduce that the density of the metal is 13.41 g/ml

Intermolecular attractions that form between nonpolar substances in water are called Hydrophobic interactions.

Intermolecular attraction refers to the attractive forces between molecules. These forces determine many of the physical properties of a substance, such as its boiling and melting points, surface tension, and viscosity. There are several types of intermolecular attractions, including hydrogen bonding, dipole-dipole interactions, and London dispersion forces.

Hydrogen bonding occurs between molecules that contain hydrogen and electronegative elements such as nitrogen, oxygen, and fluorine. Dipole-dipole interactions occur between polar molecules, where one end is positively charged and the other end is negatively charged. London dispersion forces are the result of temporary dipoles that form in nonpolar molecules and attract each other.

Intermolecular attraction plays a crucial role in the behavior of liquids and solids, and it helps to explain the properties of substances such as why some substances are liquids at room temperature, while others are solids. The strength of intermolecular attractions can be influenced by temperature, pressure, and other environmental factors, which can have a significant impact on the physical properties of a substance.

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To convert from Celsuis to Kelvin, add 273 or vice versa to convert from Kelvin to Celsuis.

So 60 Celsius + 273 = 333K

and 25 + 273 = 298K

Therefore we can see the decrease in temperature in units of degrees and Celsuis is 35.

According to law of conservation of mass, the mass  of the liquid is 7.10 grams.

According to law of conservation of mass, it is evident that mass is neither created nor destroyed rather it is restored at the end of a chemical reaction .

Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.

According to law, mass of liquid= mass of flask and liquid-mass of liquid= 102.551-95.451=7.1 00 g.

Thus,  the mass  of the liquid is 7.10 grams.

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The energy difference between the third and first energy states of an electron confined in a potential well of 1 Å width depends on various factors such as the depth of the potential well and the mass of the electron.

Energy states refers to any discrete value from a set of values of total energy for a subatomic particle confined by a force to a limited space or for a system of such particles, such as an atom or a nucleus.

The excitation energy stored in excited atoms and nuclei is radiated usually as visible light from atoms and as gamma radiation from nuclei as they return to their ground states.

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The diagram that have been shown represents an electrochemical cell.

A cell is a basic unit of an electrical system that generates electricity from a chemical reaction. It typically consists of two electrodes (anode and cathode) immersed in an electrolyte solution, which allows for the flow of ions between the electrodes.

A battery is a group of cells connected together to provide a more powerful and longer-lasting source of electrical energy. A battery can consist of one or more cells, depending on the required voltage and current output. Batteries are commonly used in portable electronic devices, automobiles, and backup power systems.

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The second floor may hold a maximum of eight electrons with two in the s orbital and 6 each of the triple p orbitals. Five d orbitals are grouped together for each principal level of energy above the second.

Despite the numerous different kinds of energy, kinetic and potential energy are the two main categories. Energy is the force that propels moving mass or objects. Examples include electrical and mechanical energy, among others.

Potential or kinetic energy are the two types of energy. Chemical, electric, gravitational, mechanical, and radioactive forms of potential energy can all be stored. Work is being done by kinetic energy forms like heat, lighting, motion, and sound.

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9.49 x 10^21 atoms of Cu is equivalent to 1.58 x 10^-2 moles of Cu.

To convert the number of atoms of copper (Cu) to moles, we need to use Avogadro's number. Avogadro's number is defined as the number of atoms, ions, or molecules in one mole of a substance. It is equal to 6.022 x 10^23.

The number of moles of Cu can be calculated as follows:

9.49 x 10^21 atoms / (6.022 x 10^23 atoms/mol) = 9.49 x 10^21 / 6.022 x 10^23 mol = 1.58 x 10^-2 mol

The number of degrees of freedom for a system made up of ice and water at equilibrium is 1.

The correct option is B.

A molecule's degree of freedom is how many different ways it can move, rotate, or vibrate in space when it is in the gas phase. There are three different kinds of degrees of freedom: translational, rotational, and vibrational.

The Gibbs phase rule states that F = C − P + 2.

where

F is the degree of freedom

C is the component

P is the phase involved

As a result, there are two degrees of freedom for a one-component, one-phase system, and any temperature and pressure are achievable within certain bounds.

From the phase rule formula:

F = C - P + 2

C is water = 1

P is liquid water and ice = 2

Hence,

F = 1 - 2 + 2

F = 1

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Rocks undergo weathering or erosion by water , air or an y mechanical factors. This will decompose the rock to small size and over time the changes to grains.

Decomposition of rocks into smaller rocks and grains is called weathering or erosion. The weathering process is of two types. Chemical weathering and physical weathering.

In chemical weathering, rocks undergo decomposition by the action of water or air. In physical weathering, a rocks breakes by a pressure. In both cases, over long time bigger rocks will change to small rock and grains.

In the given case, the rock changed in shape by decrease the sharpness of its edge. It size reduced by 1mm by one year. However, the hardness or color didn't change.

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Answer: 3.44%

Explanation: try it for math

The electrolytic reaction between Zn and Ag results in the oxidation of Zn and reduction silver metal. The oxidation of Zn make the Zn ions pass into the solution and its mass decreases.

An electrochemical cell converts chemical energy to electrical energy. It involves redox reaction of two metallic electrodes. The electrode with higher negative electrode potential undergo oxidation and one with lower negative or having positive potential undergoes reduction.

The electrode which undergo oxidation is consumed in the process and metal gets ionized. Ions move into the electrolyte. Whereas, the ions of the second electrode gets reduced into metallic state and deposits on the electrode.

In this case, Zn is oxidizing and  it is consumed to reduce the silver metal on the cathode. Therefore, the mass of Zn metal decreases in the strip.

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Answer:

false

Explanation: