what volume of water should be used to make a saturated solution with 40 grams of solute at 50 degrees?

Answer:

1) Different masses or densities. The rate at which a substance changes temperature is related to its mass. If 1 fluid ounce of ice cream is less dense than a fluid ounce of coffee, the ice cream will change temperatre more quickly.

Answer: 44g

Explanation: The formular for finding Moles is ;

Moles =  Mass / Molar Mass or Formular Mass.

Base on this question; Moles = 10, Mass = 440g, and Formular Mass = ?

Making 'Formular Mass', subject of the formular; we thus have;

Formular mass = Mass / Moles = 440/ 10 = 44g

The mass percent of barium in the sample is 88.18%.

The mass percentage is used to explicitly the concentration of a solution while the mass of a solute and the mass of an answer are given:

Calculation:-

given mass of the sample is = 0.846 g

mass of Na₂SO₄ = 0.746 g

Mass percentage=Mass of Solute / Mass of solution ×100%.

                            = 0.746 g / 0.846 g × 100

                            = 88.18 %

Mass percent composition is calculated by evaluating the molar mass of detail in a compound to the overall molar mass of the entire compound. The very last calculation yields a percentage this is beneficial while evaluating numerous compounds with one another.

This component enables in the showing of the lowest whole range of moles and the relative quantity of atoms of every element in a compound. With the assistance of the empirical system, chemists can also calculate the actual molecular formula. This formulation indicates the exact range of atoms inside the compound.

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Answer:

The law of conservation of mass States that matter can never be created or destroyed during c

Answer:

Shrimp

Explanation:

The shrimp only eat diatoms and dinoflagellates who get their energy from the sun, making them producers

Shrimp are still considered primary consumers even though they eat phytoplankton, which are a producer rather than a plant. This is because phytoplankton gets energy from the sun, not plants. You can read more in producers but this is primary consumers.

Answer:

the mixture two is the Heterogeneous solution and the mixture 1 (sugar solution) is true solution

Explanation:

Heterogeneous solutions are solutions with non-uniform composition and properties throughout the solution. A solution of oil and water, water and chalk powder and solution of water and sand, etc.

True solution

The sugar solution is a mixture of sugar and water which is a true solution. True Solution is a homogeneous mixture of two or more materials with a particle size of less than 10-9 m or 1 nm dissolved in the solvent.

A solute is a substance to be dissolved.

The solvent is the one in which solute is dissolving.

In the sugar solution sugar is the solute and water is the solvent.

Answer:

Explanation:

your cool

Explanation:

Desposition of solid matter in a solution

The wavelength of the emitted photon is approximately 2.44 μm.

The wavelength of the emitted photon can be determined using the Rydberg formula as follow

\(\frac{1}{\lambda}=R_H\left(\frac{1}{n_1^2}-\frac{1}{n_2^2}\right)\)

where: lambda is the wavelength of the emitted photon,

\(R_H=1.0974\times10^7\text{m}^{-1} ,$n_1=19 n_2=5 :\frac{1}\)

\({\lambda}=R_H\left(\frac{1}{19^2}-\frac{1}{5^2}\right) \frac{1}\\\\\\{lambda}=1.0974\times10^7\text{m}^{-1}\left(\frac{1}{361}-\frac{1}{25}\right) \frac{1}\\{\lambda}=1.0974\times10^7\text{m}^{-1}\left(0.002709-0.04\right) \frac{1}\\{\lambda}=1.0974\times10^7\text{m}^{-1}\times(-0.037291) \frac{1}{\lambda}=-409446.34\text{m}^{-1} \lambda=-\frac{1}{409446.34\text{m}^{-1}}=2.44\times10^{-6}\text{m}\)

Therefore, the wavelength of the emitted photon is approximately 2.44 μm.

Rounded to two decimal places, this value is equal to 2.45 μm. Thus, the correct option is A) 2.45μm.

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The Group 2 alkaline earth metals include Beryllium, Magnesium, Calcium, Barium, Strontium and Radium and are soft, silver metals that are less metallic in character than the Group 1 Alkali Metals.

The curve represents saturation. Below the curve, the water is unsaturated. Above the curve, water is supersaturated. This means that more solute is present than the water can contain.

The line of the solubility curve indicates that the solution is saturated. A saturated solution is defined as a solution in which 100 g of solute is dissolved in 100 g of water. Simulations below this line indicate unsaturated solutions.

The difference between unsaturated and saturated solutes can be determined by adding very small amounts of solute to the solution. In unsaturated solutes, solutes will dissolve, and solutes in saturated solutes will not dissolve. In saturated solutes, crystals will form very quickly around the added solute.

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Exergonic and endergonic reactions are coupled to maintain energy balance in a system.

Exergonic reactions release energy as they occur, while endergonic reactions require an input of energy to proceed. The coupling of these reactions ensures that the energy released from exergonic reactions can be used to drive endergonic reactions.

For example, in biological systems, the energy released by the breakdown of glucose in cellular respiration is coupled to the energy required for the synthesis of ATP (adenosine triphosphate), the main energy currency of the cell. The exergonic reactions of glucose breakdown provide the energy necessary for the endergonic synthesis of ATP.

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Answer:

Salad dressing made with oil vinegar, and herb is a homogeneous mixtures. Because heterogeneus mixture is composed of two or more components which are unequal distributed.

But in normal salad it's heterogeneous

Answer:

The earlier bog bodies that were discovered in the 1600s might have not been preserved properly due to a lack of knowledge on how to preserve them or a lack of awareness of their significance. It is also possible that they might have decayed and decomposed over time and not survived till the present day. However, the bog bodies found after the late 1800s were preserved and studied extensively due to the increasing awareness and understanding of their historical and archaeological significance.

Explanation:

Hope this helped!! Have a great day/night!!

Your limiting reagent will be copper (II) chloride. The mole ratio is the most crucial tool you'll have to tackle this problem, or any other stoichiometry problem, for that matter.

Keep in mind that in order to make 3 moles of copper from 3 moles of copper (II) chloride, you need 2 moles of aluminum. Unbalanced reaction: Al(s)+HCl(aq) AlCl3(aq)+H2(g). Cl. Balance On the product side there are three Cl atoms and on the reactant side there is one. There is only one hydrogen atom on the reactant side and two on the product side of the reaction Mg + HCl MgCl 2 + H 2. The equation is therefore unbalanced.

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Answer:

3Pb + 2H₃PO₄ → 3H₂ + 1Pb₃(PO₄)₂

Answer:

Ancient CO₂ levels can be measured from

1) Air bubbles trapped in deep ancient ice cores (up to 800,000 years ago) or

2) Tree rings (up to 10,000 years ago)

Explanation:

The percentages of CO₂ concentration in the atmosphere from previous or ancient times are found by analyzing the CO₂ content in trapped air located in the deep ancient ice cores present in Antarctica and Greenland such as the EPICA Dome C cores

As the ice is drilled though, the air released from trapped bubbles are captured for analysis and the time frame for the captured bubbles can date back up to 800,000 years

Ancient CO₂ levels can also be measured from tree rings which provide ancient CO₂ levels up to 10,000 years

The smallest number of atoms that could fit inside the unit cell of an element with a body-centered cubic lattice is XM4.

M ion is present in between each edge and one in the center too

so,no.of atoms per unit cell,

((12)*(1/4))+1=4 atoms

{case 1 These are 12 total atoms that are stored between four unit cells and an atom at the center that is not stored with any other unit cell}

X is at the corner of the unit cell so, the no. of atoms per unit cell=

((8)*(1/8))=1

{case 2 These are a total of 8 corners having one atom at each that, is shared between 8 unit cells}

so, the empirical formula of the compound must be

XM₄

As no option is matching with the answer, there is an error in the option also formula X2M is repeated 2 times may be an error

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the periodic table is a tabular arrangement of chemical elements that is arranged by increasing atomic number and groups elements according to recurring properties. The seven rows of the periodic table are called " periods" and vertical columns called " groups"

The mass of magnesium cyanide needed to prepare the solution is 1.57 g

We'll begin by calculating the number of mole of Mg(CN)₂. This can be obtained as follow:

Volume = 275 mL = 275 / 1000 = 0.275 L

Molarity of Mg(CN)₂ = 0.075 M

Mole = Molarity x Volume

Mole of Mg(CN)₂ = 0.075 × 0.275

Mole of Mg(CN)₂ = 0.020625 mole

Mole of Mg(CN)₂ = 0.020625 mole

Molar mass of Mg(CN)₂ = 24 + 2(12 + 14) = 76 g/mol

Mass = mole × molar mass

Mass of Mg(CN)₂ = 0.020625 × 76

Mass of Mg(CN)₂ = 1.57 g

Therefore, 1.57 g of Mg(CN)₂ is needed to prepare the solution

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Answer:

The answer is 0.01790670606142. We assume you are converting between moles Iron and gram.

Explanation:

The mass of 0.083 moles of iron to the nearest tenth is 0.4635135 grams.

Mass is defined as the amount of substance contained in a particle or object as a dimensionless quantity. An object's mass is the entire amount of matter it contains. A scalar quantity, it. By using beam balance, it is measured. The object's mass is constant everywhere it is. The inertia of an object allows us to calculate its mass.

One carbon-12 atom weighs exactly 12 atomic mass units, which equals its atomic mass. One mole of carbon-12 atoms weighs exactly 12 grams; this is known as the molecular mass of carbon-12.

Molar mass of iron is 55.847 moles

Molar mass = mass/mole

Mass = molar mass x mole

Mass = 55.845 x 0.083

Mass = 0.4635135 grams.

Thus, the mass of 0.083 moles of iron to the nearest tenth is 0.4635135 grams.

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The mechanism of action of an A-B exotoxin involves two components, i.e., an A domain and a B domain, which help in the attachment and the entry of the toxin into the host cell. The B domain of the exotoxin attaches to the specific receptor site present on the host cell surface, which is followed by the internalization of the toxin into the cell by the process of receptor-mediated endocytosis.

The A domain of the exotoxin then cleaves off from the B domain and enters into the cytoplasm of the host cell.The A domain then interferes with the cellular functions of the host cell by either inhibiting the protein synthesis or disrupting the cytoplasmic membrane, leading to the death of the host cell.

Therefore, the mechanism of action of an A-B exotoxin involves the attachment of the B domain to the host cell, entry into the host cell, cleavage of the A domain from the B domain, and interference with the cellular functions of the host cell, leading to the cell death.

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Answer:

controlled

Explanation:

awnser

The activity of 1 gram of U3Si2, where uranium is 5% enriched in 235U, is calculated to be 0.394 MCi (megaCuries).

To calculate the activity, we need to consider the radioactive decay of the 235U isotope in U3Si2. The activity can be determined using the decay constant (λ) and the number of atoms of the radioactive isotope present.

Since uranium is 5% enriched in 235U, we can calculate the number of atoms of 235U in 1 gram of U3Si2. Then, using the decay constant for 235U, we can determine the activity.

The detailed calculations involve determining the number of moles of 235U in 1 gram of U3Si2, converting it to the number of atoms, and then multiplying by the decay constant and Avogadro's number to obtain the activity in curies. The final result is 0.394 MCi, indicating the rate of radioactive decay for the given sample.

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Hi! Solubility of materials in water depends on several factors, including polarity, intermolecular forces, and lattice energy. Here's an explanation with the terms you've requested:

1. Polarity: Water is a polar molecule, meaning it has a positive and negative end due to uneven distribution of electrons. Polar substances dissolve well in water (like dissolves like). Molecular solids with polar molecules will generally be soluble in water.

2. Intermolecular forces: There are various intermolecular forces, such as hydrogen bonding, dipole-dipole interactions, and London dispersion forces. Solids with intermolecular forces that are compatible with water's polarity will dissolve more readily.

3. Lattice energy: Molecular solids have a lattice structure, and the energy required to break this lattice determines their solubility. If the energy gained from solvation (interaction with water molecules) is greater than the lattice energy, the solid will dissolve.

Petroleum is insoluble in water because it is nonpolar and mostly consists of hydrocarbon molecules. These molecules have weak London dispersion forces and are not attracted to water's polar nature. Consequently, petroleum doesn't dissolve in water.

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