Question 8 (3 points)
Cindy dropped a test tube during a lab in science class, spilling its contents on the
floor. She immediately picked up the broken glass and used paper towels to clean up
the spill before redoing her lab.
How should she have handled the clean up?

The statements that does not support the Kinetic Molecular Theory is (option A) the particles of an ideal gas are separated by short distances, compared to their size.

The kinetic molecular theory is a scientific model that explains the behavior of gases based on the motion of their constituent particles. It makes several assumptions about the behavior of gas molecules and how they interact with each other and their surroundings.

In an ideal gas, the particles are considered to be point masses that have negligible volume and do not interact with each other except through elastic collisions.

Therefore, the particles of an ideal gas are considered to be separated by long distances, because there is no attraction or repulsion between the particles, and they move freely in a random motion in the available volume of the container.

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Answer:

angular momentum

Explanation:

Answer:

5 grams of iron react with 5 grams of oxygen to produce iron 3 oxide.

The actual yield of the reaction is--- 5 grams.

What is the percent yield?

Explanation:

The balanced chemical equation of the reaction is:

\(4Fe(s)+3O_{2} (g)->2Fe_{2} O_3(s)\)

1)Identify the limiting reagent.

2)Using the limiting reagent calculate the amount of theoretical yield formed.

Identification of limiting reagent:

4 mol of Fe reacts with 3mol. of O2

that is:

4mol(55.84g/mol) of Fe reacts with ---- 3mol (32.0g/mol)

=223.36g of Fe reacts with ---- 96g. of O2

then,

5g of Fe requires how many grams of O2?

\(=>5g. of Fe * \frac{96g O2}{223.36g Fe} \\=2.14g. of O_{2} .\\\)

But provided 5g of O2.

So, O2 is present more than required.

Hence, O2 is the excess reagent and the limiting reagent is Fe.

The amount of product formed depends only on the amount of Fe only.

Theoretical yield:

From the balanced chemical equation:

4mol. of Fe forms ----- 2mol. of Fe2O3.

that is

223.36g of Fe forms --- 2(159.68g)of Fe2O3.

=>223.36g of Fe forms --- 319.36g of Fe2O3.

then,

5g of Fe forms ----? grams of Fe2O3

\(=>5g of Fe * \frac{319.36g Fe2O3}{223.36g of Fe} \\=7.14g. of Fe2O3\\\)

\(%Error =\frac{actual yield}{theoretical yield} * 100\\\\ %error=\frac{5g}{7.14g} * 100\\ %error =70.0\)% error=actual yield/ theoretical yield  x 100

%error=5g./7.14g  x100

=>%error=70.0

Hence, the answer is 70.0%.

Answer:

well for me I think

Explanation:

Water has higher heat capacity than methane because before heat can break the bond it has to reach a very high temperature

Answer:

water has a lower heat capacity than methane .

Explanation:

b/c methane is gases so higher heat capacity

1. In order to answer this one and the next one, we will use mass percentage as our guide, since every compound has a mass percentage for each element, and this is found by checking the total mass and the separate masses of each element, for example, MgF2, the mass percentage is 39% for Mg and 61% for F2, this is due to their molar mass, 24g for Mg and 38g for F2

We have 27.1 g of Mg, and this will always correspond for 39% of the total mass of the compound, so we can do the following math:

100% = x

39% = 27.1g

x = 69.5 grams is the total mass of MgF2, now we only have to subtract the value of Mg and then we will have F2

69.5 - 27.1 = 42.4 grams, this is the mass of Fluorine

2. The same step by step from the previous question, 36% of the total mass is Al and 64% is S, but this question has a little difference, now we have the mass of the compound, but the process is very similar

100% = 50.2 grams

64% = x grams

x = 32.1 grams, which can be considered as letter A

To answer this question, we need to know the volume of the solution used to electroplate the penny and the duration of electrolysis. Without that information, we cannot determine the concentration of the solution after electrolysis.

Additionally, the missing terms such as the inner part of the penny and the coat of electroplated material do not have any relevance to finding the concentration of the solution.

Electrolysis is a technique that uses direct electric current (DC) to drive an otherwise non-spontaneous chemical reaction. Electrolysis is commercially important as a stage in the separation of elements from naturally occurring sources such as ores using an electrolytic cell. The voltage that is needed for electrolysis to occur is called the decomposition potential.

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This increased energy causes the molecules to move more rapidly, which in turn increases the volume of the substance. As the volume of the substance increases, its density decreases because the same amount of matter is spread out over a larger volume.

The density decreases as the temperature increases because the molecules lose energy and slow down, so the same number of molecules occupy less space. This happens because the increase in temperature causes the molecules to move more rapidly, increasing the space between them. The density of a substance is defined as its mass per unit volume. The density of a substance depends on its temperature, as well as its pressure and composition. As the temperature of a substance increases, the kinetic energy of its molecules also increases. This increased energy causes the molecules to move more rapidly, which in turn increases the volume of the substance. As the volume of the substance increases, its density decreases because the same amount of matter is spread out over a larger volume.

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Answer:

Just look at which one it doesn't show.

Explanation:

Characteristics of compounds

1. Components in a compound are present in a definite proportion.

2. It has a homogeneous composition.

3. Particles in a compound are of one kind.

4. A compound is made up of one or more atoms of the same or different elements.

5. In a compound the elements are present in a fixed ratio by mass.

6. A compound can be divided into simpler substances by a chemical process.

7. The physical and chemical properties of a compound are completely different from those of its constituents.

the molar concentration of the resulting NaCl solution is 0.804 mol/L.

The molar concentration of the NaCl solution can be calculated using the equation:

C = n/V,

where C is the molar concentration, n is the amount of substance (in moles), and V is the volume of the solution (in liters).

Given that the sample has a mass of 23.5 g and the molar mass of NaCl is 58.44 g/mol, we can calculate the amount of substance (n) in the sample:

n = 23.5 g / 58.44 g/mol = 0.402 mol

The volume of the solution (V) is equal to the volume of the Erlenmeyer flask, which is 0.500 L:

V = 0.500 L

Therefore, the molar concentration of the NaCl solution can be calculated as follows:

C = 0.402 mol / 0.500 L = 0.804 mol/L

Therefore, the molar concentration of the resulting NaCl solution is 0.804 mol/L.

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The structural formula of glutamic acid at pH 1 is \(NH3+ – CH2 – CH2 – COOH.\)

At pH = 1, the amino and carboxyl groups in glutamic acid are protonated, meaning they have gained a hydrogen ion (H+). This results in the formation of the zwitterion form of glutamic acid, with a net charge of +1:

\(NH3+ – CH2 – CH2 – COOH\)

The pI (isoelectric point) of glutamic acid is 3.2, which is the pH at which the molecule has no net charge. At pH = 1, the molecule has a net positive charge, so it is not at its pI.

The structural formula of glutamic acid at pH = 1 is shown above.

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To determine how many moles of carbon dioxide are in 211 g of carbon dioxide, we'll use the formula of moles given the mass and molar mass of the substance.

What is a mole?

A mole is defined as the amount of a substance that contains as many entities (such as atoms, molecules, or ions) as there are in 12 grams of carbon-12. One mole of a substance contains 6.022 × 1023 entities

To determine the number of moles in a sample, divide the mass of the sample by the molar mass of the substance.

The equation can be written as:

n = m / M,

where n is the number of moles, m is the mass of the sample in grams, and M is the molar mass of the substance in grams per mole.

The molar mass of carbon dioxide is approximately 44 g/mol.

Hence, the number of moles of carbon dioxide in 211 g of carbon dioxide is:

n = m / M

= 211 g / 44 g/mol

= 4.80 moles

Therefore, there are 4.80 moles of carbon dioxide in 211 g of carbon dioxide.

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Answer:

Presence of starch in a leaf is reliable evidence of photosynthesis

Excessive energy created from photosynthesis is stored in plant tissue as starch. Starch is a white and powdery substance. It houses glucose (which plants use for food).

Hope it helps:)

Answer:

because the salt will melt the egg shell because of whats in the salt

i tried i didnt really know the answer LOL

Explanation:

In the fasted state, fatty acyl-CoA is transported across the mitochondrial membrane. The transport of fatty acids via carnitine palmitoyltransferase I (CPTI) can be directly inhibited by Malonyl-CoA.

Malonyl-CoA- Malonyl-CoA is a metabolite found in all living organisms, including humans. It is a molecule produced by the carboxylation of acetyl-CoA and is the first intermediate in fatty acid biosynthesis. Malonyl-CoA is a potent inhibitor of carnitine palmitoyltransferase I (CPTI), which is found on the outer mitochondrial membrane.

Carnitine palmitoyltransferase I- Carnitine palmitoyltransferase I (CPTI) is a crucial enzyme that controls the transportation of long-chain fatty acids into the mitochondria, where they undergo β-oxidation to produce energy. CPTI is located on the outer mitochondrial membrane and is responsible for catalyzing the rate-limiting step in fatty acid oxidation.

Function of β-oxidation- β-oxidation is a metabolic process in which fatty acids are broken down into acetyl-CoA molecules, which can then enter the citric acid cycle and produce energy. The process occurs in the mitochondria, and it begins with the activation of the fatty acid to a fatty acyl-CoA by fatty acyl-CoA synthetase.

The fatty acyl-CoA is then transported across the mitochondrial membrane via carnitine palmitoyltransferase I (CPTI) and is broken down through a series of reactions by β-oxidation enzymes. Finally, the resulting acetyl-CoA molecules enter the citric acid cycle and are oxidized to produce ATP.

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In the preceding equation, 6.67 moles of boric acid (\(H_3BO_3\)) will react to generate 10 moles of water (\(H_2O\)).

To determine the number of moles of boric acid that react in the equation to produce 10 moles of water, we need to examine the balanced chemical equation and use stoichiometry.

1. Begin by examining the balanced chemical equation for the reaction involving boric acid and water. Let's assume the equation is:

  \(3H_2O\) + \(3H_2O\) -> \(B_2O_3\) + \(6H_2O\)

2. From the balanced equation, we can see that 2 moles of boric acid (H3BO3) react with 3 moles of water (\(H_2O\)) to produce 6 moles of water (\(H_2O\)).

3. Use the given information that 10 moles of water (\(H_2O\)) are produced. Since the stoichiometric ratio between boric acid and water is 2:3, we can set up a proportion to find the number of moles of boric acid:

  2 moles \(H_3BO_3\) / 3 moles \(H_2O\) = x moles \(H_3BO_3\) / 10 moles \(H_2O\)

4. Cross-multiply and solve for x:

  (2 moles \(H_3BO_3\))(10 moles \(H_2O\)) = (3 moles \(H_2O\))(x moles \(H_3BO_3\))

  20 moles \(H_2O\) = 3x moles \(H_3BO_3\)

5. Divide both sides of the equation by 3 to isolate x:

  x moles \(H_3BO_3\) = (20 moles \(H_2O\)) / 3

6. Calculate the value of x:

  x moles \(H_3BO_3\) ≈ 6.67 moles \(H_3BO_3\)

Therefore, approximately 6.67 moles of boric acid (\(H_3BO_3\)) will react to produce 10 moles of water (\(H_2O\)) in the given equation.

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The correct (R) or (S) designations for stereocenter carbons are as follows: (S) is the organic substrate, and (P) is the organic product (R).

The substrate is designated as S the reaction's result as R. As a result. The SN2 reaction's mechanism can be summed up as follows: This nucleophilic substitution process only requires one step.

Due to the involvement of two reactants in the step that determines the rate, the reaction is referred to as the SN2 reaction.

The electrophile is attacked by the nucleophile in the reaction's mechanism, causing a transition phase in which the electrophile's alkyl group leaves and the nucleophile forms a new bond with the substrate that is still present.

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A single replacement reaction is a type of chemical reaction that takes place when one element in a compound is replaced by another element. In other words, in this reaction, one element is replaced by another element. There are a few ways to predict whether or not a single replacement reaction will occur.

These ways are explained below: Paying Attention to ReactantsThe first way to predict if a single replacement reaction will occur is by paying attention to the reactants. In a single replacement reaction, a more reactive element will replace a less reactive element. For example, if a metal element is mixed with an aqueous solution that contains ions of another metal, a single replacement reaction will occur if the metal in the solid state is more reactive than the metal in the solution state. For instance, if you put zinc in copper sulfate, a reaction will occur because zinc is more reactive than copper. Therefore, it will replace copper, producing zinc sulfate and copper.Using the Activity SeriesAnother way to predict if a single replacement reaction will occur is by using the activity series. The activity series is a list of metals and their ability to replace other metals from their compounds. This list is arranged in order of decreasing activity. Therefore, if a metal is more active than another metal on the activity series, it will replace that metal from its compound. For example, if you put magnesium in silver nitrate, a reaction will occur because magnesium is more reactive than silver. Therefore, magnesium will replace the silver, producing magnesium nitrate and silver. If the metal is less active than another metal on the activity series, no reaction will occur.Using Electrochemical SeriesThe electrochemical series is another way to predict if a single replacement reaction will occur. The electrochemical series lists the elements in order of their standard reduction potentials. A metal with a higher reduction potential will replace a metal with a lower reduction potential from its compound. For instance, if you put copper in magnesium sulfate, no reaction will occur because copper has a lower reduction potential than magnesium. Therefore, magnesium will not replace copper from its compound.

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To determine the specific heat of the metal, we can use the equation:

Q = mcΔT

where Q is the heat transferred, m is the mass of the metal, c is the specific heat of the metal, and ΔT is the change in temperature.

First, let's calculate the heat transferred to the water:

Q_water = mw * cw * ΔTw

where mw is the mass of water, cw is the specific heat of water, and ΔTw is the change in temperature of water.

Given:

mw = 110.0 g (mass of water)

cw = 4.18 J/g°C (specific heat of water)

ΔTw = (311.56 - 24.00) °C (change in temperature of water)

Q_water = (110.0 g) * (4.18 J/g°C) * (311.56 - 24.00) °C

Next, let's calculate the heat transferred to the metal:

Q_metal = mm * cm * ΔTm

where mm is the mass of the metal, cm is the specific heat of the metal, and ΔTm is the change in temperature of the metal.

Given:

mm = 110.0 g (mass of metal)

ΔTm = (311.56 - 85.0) °C (change in temperature of metal)

Since the container is insulated, the heat lost by the water is equal to the heat gained by the metal:

Q_water = Q_metal

Therefore, we have:

(mw * cw * ΔTw) = (mm * cm * ΔTm)

Solving for cm (specific heat of the metal), we get:

cm = (mw * cw * ΔTw) / (mm * ΔTm)

Now, substitute the given values into the equation to calculate the specific heat of the metal.

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Answer:

Molarity of a solution = 1 mol / L

Explanation:

Given:

Amount of NaOH =20 g

Amount of water = 0.50 l

Find:

Molarity of a solution

Computation:

1 mol of NaOH = 40 g

So,

Moles of NaOH = 20 / 40 g = 0.50 mol NaOH

Molarity of a solution = moles of solute / Liters of solution

Molarity of a solution = 0.50 / 0.50

Molarity of a solution = 1 mol / L

Answer: White objects look white because they reflect back all the visible wavelengths of light that shine on them - so the light still looks white to us. Colored objects, on the other hand, reflect back only some of the wavelengths; the rest they absorb.

Explanation:

Hydrochlorothiazide, C₇H₈ClN₃O₄S₂, mass percentage of Cl in hydrochlorothiazide is  11.93% ≈ 12.

The concentration of an element in a compound or element of a combination can be expressed as a mass percentage. The mass percentage is calculated by multiplying the result by 100% after dividing the combined mass by the masses of each component.

Molecular mass of Cl = 35.5

Molecular mass of  C₇H₈ClN₃O₄S₂

= 7×2 + 8×1 + 35.5×1 + 14×3 + 16×4 + 32×2

Molecular mass of C₇H₈ClN₃O₄S₂ =  84 + 8 + 35.5 + 42 + 64 + 64

Molecular mass of C₇H₈ClN₃O₄S₂ = 297.5

You can express the mass percentage of chlorine in hydrochlorothiazide as follows:

Mass percentage = 35.5/297.5×100

Mass percentage = 11.93% ≈ 12

Hence, the mass percentage of of Cl in hydrochlorothiazide, C₇H₈ClN₃O₄S₂ is 11.93% ≈ 12.

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The volume of the glycerol sample is 36.4 mL.

To calculate the volume of a substance, we can use the formula:

Volume = Mass / Density.

Given that the mass of the glycerol sample is 43.7 g and the density is 1.20 g/mL, we can substitute these values into the formula:

Volume = Mass / Density

Volume = 43.7 g / 1.20 g/mL

Volume = 36.4 mL

In this calculation, we use the formula Volume = Mass / Density, where the mass is given in grams and the density is expressed in grams per milliliter. Dividing the mass by the density gives us the volume in milliliters, as density is defined as mass per unit volume.

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The molar concentration of the weak acid solution is 0.09308 M.

To determine the molar concentration of the weak acid solution, we need to use the balanced chemical equation for the reaction between the weak acid and the strong base NaOH:

HA + NaOH → NaA + H2O

where HA is the weak monoprotic acid and NaA is its corresponding sodium salt.

At the stoichiometric point of the titration, all of the weak acid has reacted with the strong base, and the number of moles of NaOH used is equal to the number of moles of weak acid present in the original solution:

n(HA) = n(NaOH)

We can use the molarity and volume of NaOH used to calculate the number of moles of NaOH used:

n(NaOH) = M(NaOH) × V(NaOH)

= 0.0981 mol/L × 23.74 mL / 1000 mL/L

= 0.002327 moles

Since the molar ratio of HA to NaOH in the balanced equation is 1:1, the number of moles of HA in the original solution is also 0.002327 moles.

To calculate the molar concentration of the weak acid solution, we divide the number of moles of HA by the volume of the original solution used in the titration:

M(HA) = n(HA) / V(HA)

= 0.002327 moles / 25.0 mL / 1000 mL/L

= 0.09308 mol/L

Therefore, the molar concentration of the weak acid solution is 0.09308 M.

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12,194 L is the answer!

Explanation:

Water has the maximum density at the temperature of 4°Celsius. So, it expands at temperatures higher or lower than 4°C, knowing that at the temperature of -25°C the water can't have a lower volume than the one at 15°C.

Answer:

12, 194 L

That's your answer!!!

Answer:

Lime

Explanation:

Out of all types of oil, coconut oil is one of the oils that would remain solid at the highest temperature. However, the answer to this question will also depend on the type of oil and its composition.

Coconut oil contains a high percentage of saturated fats which gives it the properties to remain solid at high temperatures. It is one of the few oils that can withstand high temperatures without oxidizing, producing harmful free radicals, or breaking down into unhealthy fats.

Coconut oil is suitable for high-heat cooking such as frying and baking and also has a long shelf life. Therefore, it can be concluded that coconut oil is one of the best options for cooking at high temperatures, as it can withstand high heat without breaking down into harmful compounds. It has a high smoke point and does not degrade quickly when exposed to high temperatures. So, it remains solid at the highest temperature.

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Answer:

2I- ---> I2 + 2e- = O

Au+3 + 3e- ---> Au = R

Explanation:

The first loses electrons, so it is Oxidized, and the second one gains electrons, so it is Reduced. (Also I just did this and saw the answers were O and R respectively)

Answer: o, r

Explanation:

i did the assignment on edge on 2022