If 3.57 g of barium sulfate is formed, how many grams of sodium sulfate reacted

Answer: aging?

Explanation: sorry, i’m not too sure, but that would be my best guess.

Answer:

Hello!!! Princess Sakura here ^^

Explanation:

The precipitate forms when one of the compounds is insoluble. In double replacement reactions, the positive ions and the negative ions are dissolved reactants that switch places to form the precipitation reaction.

Answer:

because one of the compounds in insoluble

Explanation:

a p e x :)

By expelling the air below the filter paper, vacuum filtration maintains a pressure differential across the filter medium.

In addition to gravity, vacuum filtration increases the rate of filtration and exerts a force on the solution.

A vacuum pump forces the liquid through the filter, which is used to separate the solid solution from the liquid. It is utilized generally utilized when particles broke down in a dissolvable and afterward recuperated through warming, so the fluid dissipates.

When you need to isolate the precipitate (the solid), you use vacuum filtration, also known as Buchner filtration. When you need to isolate the precipitate (the solid) for further work or analysis, you use filtration under vacuum with a Buchner funnel. The device required is; a funnel by Buchner.

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Answer:

The table compares making ethanol by hydration of ethene (ethene and steam) to making ethanol by fermentation (sugar from plant material).

The concentration of iron(iii) chloride contaminant in the original groundwater sample is (C1 × V1 / V) × 162.2 g/mol.

Given that the chemist adds m silver nitrate solution to the sample until silver chloride stops forming. He then washes, dries, and weighs the precipitate. He finds he has collected of silver chloride. Let us calculate the concentration of iron(iii) chloride contaminant in the original groundwater sample.Calculating the concentration of iron(iii) chloride contaminant in the original groundwater sample

Here is the given information;

Mass of silver chloride precipitate = m grams

Volume of groundwater sample taken = V ml

Volume of AgNO3 solution used = V1 ml

Concentration of AgNO3 solution = C1

Molar Mass of AgCl precipitated = 143.5 g/mol

The molarity of AgNO3 solution is given as;

Molarity of AgNO3 = Number of equivalents / Volume of solution in liters

We know that 1 mole of AgNO3 gives 1 mole of AgCl, i.e., AgNO3 is equivalent to AgCl.Therefore, the number of equivalents of AgNO3 is the same as the number of equivalents of AgCl.

Number of equivalents of AgNO3 = C1 × V1

Number of equivalents of AgCl = m / 143.5 g/mol

Concentration of FeCl3 = (Number of equivalents of FeCl3 / Volume of sample in liters) × Molar mass of FeCl3

Number of equivalents of FeCl3 = Number of equivalents of AgNO3

Number of equivalents of FeCl3 = C1 × V1

Concentration of FeCl3 = (C1 × V1 / V) × Molar mass of FeCl3

Concentration of FeCl3 = (C1 × V1 / V) × 162.2 g/mol

Hence, the concentration of iron(iii) chloride contaminant in the original groundwater sample is (C1 × V1 / V) × 162.2 g/mol.

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Answer:

Digestive enzymes break down food into smaller building blocks which makes it easier for absorption by the body.

Answer:

Break down the pood particles for their absorption e. g pepsin breaks down protein for its absorption in small intestine. Pepsin is present in stomach

Answer:

66.5% (3 s.f.)

Explanation:

Please see the attached pictures for the full solution.

*Mr stands for relative formula mass

0.600 mol of HCl are needed to react with 0.300 mol of \(Na_2CO_3\).

What is moles?

Moles is a unit of measurement used in chemistry to express the amount of a substance. One mole of a substance is defined as the amount of that substance which contains the same number of particles (atoms, molecules, or ions) as there are in exactly 12 grams of carbon-12. This number of particles is known as Avogadro's number, which is approximately 6.022 x 10²³ particles per mole.

To answer this question, we need to first write the balanced chemical equation for the reaction between HCl and \(Na_2CO_3\):
\(2HCl + Na_2CO_3\rightarrow 2NaCl + CO_2 + H_2O\)
From the balanced equation, we can see that 2 moles of HCl react with 1 mole of \(Na_2CO_3\). Therefore, to calculate the moles of HCl needed to react with 0.300 moles of \(Na_2CO_3\), we can use the following conversion factor:
0.300 mol \(Na_2CO_3\) x (2 mol HCl / 1 mol \(Na_2CO_3\)) = 0.600 mol HCl
Therefore, 0.600 moles of HCl are needed to react with 0.300 moles of \(Na_2CO_3\).

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Sure! I will help you draw a stick structure for trans-1-ethyl-2-t-butylcyclopentane. To begin with, let's look at the given term "trans-1-ethyl-2-t-butylcyclopentane."

The prefix "trans" indicates that the two functional groups are on opposite sides of the ring. 1-ethyl indicates that the ethyl group is attached to the first carbon of the ring, whereas 2-t-butyl indicates that the t-butyl group is attached to the second carbon of the ring. Now, let's see how the stick structure can be drawn. We start by drawing a cyclopentane ring with one of the carbons labeled as 1. Then, we attach an ethyl group to the carbon 1 and a t-butyl group to the carbon 2. As per the instructions, the ethyl and t-butyl groups should be on opposite sides of the ring.

Therefore, the t-butyl group should be oriented downwards while the ethyl group should be oriented upwards from the plane of the ring. The final stick structure of trans-1-ethyl-2-t-butylcyclopentane is shown below:Thus, the stick structure for trans-1-ethyl-2-t-butylcyclopentane has been successfully drawn.

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Percent composition indicates the relative amounts of each element in a compound. For each element, the mass percent formula is: % mass = (mass of element in 1 mole of the compound) / (molar mass of the compound) x 100% or. mass percent = (mass of solute / mass of solution) x 100%.

Answer: The given statement is TRUE.

Explanation:

An equilibrium reaction is one in which rate of forward reaction is equal to the rate of backward reaction.

Equilibrium constant is defined as the ratio of the product of the concentration of products to the product of the concentration of reactants each raised to their stochiometric coefficient.

For example for the given equilibrium reaction;

\(2H_2O(g)\leftrightharpoons 2H_2(g)+O_2(g)\)

\(K_{eq}=\frac{[H_2]^2[O_2]}{[H_2O]^2}\)

Thus the given statement that in calculating the equilibrium constant for a reaction, the coefficients of the chemical equation are used as exponents for the factors in the equilibrium expression is True.

The estimated optimum pipe diameter for a flow of H₂SO₄ of 300 kg/min at 7 bar and 35°C, in a carbon steel pipe, can be determined using fluid dynamics calculations and considering the molar volume. The approximate pipe diameter is 0.653 meters

Step 1: Calculate the molar flow rate

To estimate the optimum pipe diameter, we first need to calculate the molar flow rate of H₂SO₄. By dividing the mass flow rate (300 kg/min) by the molar mass of H₂SO₄ (approximately 98 g/mol), we can determine the molar flow rate. This yields a molar flow rate of 3061.22 mol/min.

Step 2: Convert the operating conditions to standard conditions

The molar volume provided is at 1 bar and 0°C, while the given operating conditions are at 7 bar and 35°C. To bring the conditions to standard state, we use the ideal gas law. By rearranging the equation and substituting the given values, we can calculate the molar volume at standard conditions. The result is approximately 0.317 m³/kmol.

Step 3: Calculate the pipe diameter

Using the equation Q = (π/4) * D² * V, where Q is the flow rate, D is the pipe diameter, and V is the fluid velocity, we can solve for the pipe diameter. By substituting the known values, we can estimate the optimum pipe diameter to be around 0.653 meters.

In summary, to estimate the optimum pipe diameter for the given H₂SO₄ flow, we calculated the molar flow rate, converted the operating conditions to standard conditions, and used the fluid dynamics equation to determine the pipe diameter. The estimated diameter is 0.653 meters.

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Answer:

nanoparticle cancer drugs could act like biological missiles that destroy tumors while minimizing damage to healthy organs

Answer:

Some of the common impacts of earthquakes include structural damage to buildings, fires, damage to bridges and highways, initiation of slope failures, liquefaction, and tsunami.

The main difference between an alkaline wave and a true acid wave lies in their pH levels and chemical compositions. An alkaline wave has a higher pH, typically around 9-11, and uses an alkaline chemical, such as ammonium thioglycolate, to break and reform the hair's disulfide bonds. In contrast, a true acid wave has a lower pH, typically around 4.5-7, and employs an acid-based chemical, like glyceryl monothioglycolate or cysteamine, to alter the hair's protein structure. These differences in pH and chemical composition determine the curling or straightening effects and the potential risks associated with each type of wave.

An alkaline wave, also known as a cold wave, has a higher pH compared to a true acid wave. It typically has a pH range of 9-11. Alkaline waves use an alkaline chemical, most commonly ammonium thioglycolate, to break the disulfide bonds in the hair's protein structure. The disulfide bonds are then reformed in the desired shape, resulting in the formation of curls or waves.

On the other hand, a true acid wave has a lower pH, usually ranging from 4.5-7. Acid waves use acid-based chemicals, such as glyceryl monothioglycolate or cysteamine, to alter the hair's protein structure. The acid chemicals work by softening the protein structure of the hair, allowing it to be reshaped into curls or waves.

The difference in pH and chemical composition between alkaline and acid waves affects their performance and potential risks. Alkaline waves tend to provide stronger curling effects but can be more damaging to the hair due to the higher pH and alkaline nature of the chemicals. Acid waves, with their lower pH, are generally considered milder and gentler on the hair, but they may not produce as strong or long-lasting curls as alkaline waves.

It's important to note that the choice between an alkaline wave and a true acid wave depends on various factors, including the desired outcome, hair type, and condition. Professional advice and proper application techniques are essential to achieve the desired results and minimize potential damage.

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Answer:

A. zinc metal

Explanation:

Zinc is a chemical element with the symbol Zn and atomic number 30. Zinc is a slightly brittle metal at room temperature and has a blue-silvery appearance when oxidation is removed. It is the first element in group 12 of the periodic table.

Answer:

A.) Zinc (Zn) is a metal

Explanation:

Hope this helps!

Answer:

It is B.

Explanation:

The introduction serves to inform the reader of the basic premises, and then to state the author's thesis, or central idea. A thesis can also be used to point out the subject of each body paragraph. When a thesis essay is applied to this format, the first paragraph typically consists of a narrative hook, followed by a sentence that introduces the general theme, then another sentence narrowing the focus of the one previous. (If the author is using this format for a text-based thesis, then a sentence quoting the text, supporting the essay-writer's claim, would typically go here, along with the name of the text and the name of the author. Example: "In the book Night, Elie Wiesel says..."). After this, the author narrows the discussion of the topic by stating or identifying a problem. Often, an organizational sentence is used here to describe the layout of the paper. Finally, the last sentence of the first paragraph of such an essay would state the thesis the author is trying to prove. The thesis is often linked to a "road map" for the essay, which is basically an embedded outline stating precisely what the three body paragraphs will address and giving the items in the order of the presentation. Not to be confused with an organizational sentence, a thesis merely states "The book Night follows Elie Wiesel's journey from innocence to experience," while an organizational sentence directly states the structure and order of the essay. Basically, the thesis statement should be proven throughout the essay. In each of the three body paragraphs, one or more identified (evidence/fact/etc.) that supports the thesis statement is discussed. And in the conclusion, everything is analyzed and summed up. For example, the conclusion part in an essay about sports: "Sports can bring a bunch of benefits for youth, including general health, together with blood circulation and overall physical stamina improvement. Sport develops and improves people’s physical, social, and organizational skills, which are beneficial in personal and professional life and must always be obtained."

The following pairs are showing the types of bonds as follows:

1: N and H -  Moderately to very polar covalent

2: F and F - Nonpolar covalent

An enduring attraction between atoms or ions known as a chemical bond is what allows molecules and crystals to form.

Ionic, covalent, hydrogen, and van der Waals interactions are the four types of chemical bonding that are necessary for life to exist.

3: Li and F - ionic bond

4: Al and Cl - Very polar covalent

5: H and Br - Moderately polar covalent

6: S and F - Very polar covalent

7: C and O - Moderately to very polar covalent

8: Li and O - Ionic

9: Cl and F - Moderately polar covalent

10: Br and Br - Nonpolar covalent

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Answer:

Explanation:

The closest I can come to this is

Li C2H5 which would really be weird, but it comes to nearly 37.11. Everything depends on the periodic table you are using.

C2 = 2 * 12.011 = 24.022

H5 = 5 *   1.008 = 5.040

Li =  1 * 6.94          6.94

Total                    36.002  

Answer:

Sea turtle

Is the animal in the image

If 50 g of potassium nitrate is added to 100 g of water at 30 degrees Celcius, 30 gram of potassium nitrate will not dissolve.

A solubility curve is a curve that is produced when the amount of solute that dissolves in a given volume of solvent is plotted against the temperature of the solution formed.

A solubility curve can be used to predict the amount of a given solute that will dissolve in a given amount of solvent at a particular temperature.

The solubility curve of potassium nitrate is shown in the attachment.

At 30°C, the solubility of potassium nitrate is 20 g/100 g of water.

Hence, the amount of potassium nitrate that will remain undissolved when 50 g of it is added to 100 g of water at 30°C will be:

Amount left undissolved = 50 - 20 g

Amount left undissolved = 30

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Answer:

5/3 or 1 2/3 atmospheres.

Explanation:

If the temperature is kept constant then P*V will be constant.

The standard pressure is 1 Atm. so:

250 * 1 = 150 * V

V = 250 / 150

= 5/3 Atm.

The new pressure of gas  is 126.66 mm Hg  at constant temperature according to Boyle's law.

Boyle's law is an experimental gas law which describes how the pressure of the gas decreases as the volume increases. It's statement can be stated as, the absolute pressure which is exerted by a given mass of an ideal gas is inversely proportional to its volume provided temperature and amount of gas remains unchanged.

Mathematically, it can be stated as,

P∝1/V or PV=K. The equation states that the product of of pressure and volume is constant for a given mass of gas and the equation holds true as long as temperature is maintained constant.

According to the equation the unknown pressure and volume of any one gas can be determined if two gases are to be considered.That is,

P₁V₁=P₂V₂

∴P₂=760×250/150=126.66 mm Hg

Therefore, the final pressure  of the gas is 126.66 mm Hg.

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Purified water when growing nanoparticles in solution must be used so that The number of ions in solution must be carefully controlled

A particle that is smaller than 100 nm in size is referred to as a nanoparticle. These kinds of particles have many uses, particularly in the materials sector. Because the presence of ions in solution might alter the characteristics of the nanoparticles and the stability of the solution, purified water is frequently utilised while developing nanoparticles in solution.

To guarantee constant and repeatable development of nanoparticles, the number of ions in the solution must be carefully regulated. Ions in a solution can alter a nanoparticle's surface charge, which in turn can alter its stability and behaviour. There are several ways to manage ions in a solution, including utilising filtered water, altering the solution's pH, and employing salts to regulate the ionic strength of the solution.

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Answer:

A neon lamp was switched on during the Great Depression and continued to burn until it was discovered some 77 years later. The electricity bill came up to a whopping $17 000!

Explanation:

Answer:

I hope that's what u were lookong for :))

Explanation:

A. The amount of resonance will be influenced by a sound's frequency. B. A sound's pitch has an effect on resonance. C. The amount of resonance is influenced by a sound's pitch.

D. A sound's frequency has an effect on resonance.

A hypothesis, which is a statement that can be tested, provides an explanation for an experiment's observation or phenomenon.

It is a proposed explanation for a phenomenon that no established scientific theory can currently explain.

A theory put forth to explain a phenomenon is called a hypothesis. An experiment's anticipated or potential outcome is provided by a hypothesis. It is necessary for a hypothesis to be testable and falsifiable, meaning that it can be disproven. Typically, observations, research, and logical reasoning are used to formulate hypotheses.

A hypothesis must be tested by gathering evidence and data, carrying out experiments, and evaluating the outcomes to determine whether or not the data back up the hypothesis.

In order for a hypothesis to be accepted as a scientific theory, it needs to be based on existing knowledge and reasonable assumptions.

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Answer:

khate ko ban randi ko ban