The amount of ascorbic acid (vitamin C; C₆H₈O₆ )in tablets is determined by reaction with bromine and then titration of the hydrobromic acid with standard base:
C₆H₈O₆(aq) + Br₂(aq) → C₆H₆O₆(aq) + 2HBr(aq)
HBr(aq) + NaOH(aq) → NaBr(aq) + H₂O(l)
A certain tablet is advertised as containing 500 mg of vitamin C. One tablet was dissolved in water and reacted with Br₂. The solution was then titrated with 43.20 mL of 0.1350 M NaOH. Did the tablet contain the advertised quantity of vitamin C?

Option (d), P=ATC=MR=MC, accurately represents the long-run equilibrium condition for perfect competition, reflecting the balance between price and cost for firms operating in a competitive market.

The long-run equilibrium condition for perfect competition is that price (P) is equal to average total cost (ATC), which is also equal to marginal cost (MC), and marginal revenue (MR).

Option (d), P=ATC=MR=MC, best represents the long-run equilibrium condition for perfect competition. In perfect competition, firms operate at the minimum point of their average total cost curve, where price equals both average total cost and marginal cost. This condition ensures that firms are earning zero economic profit and are producing at an efficient level.

In the long run, if firms are earning economic profit, new firms will enter the market, increasing competition and driving prices down. Conversely, if firms are experiencing losses, some firms may exit the market, reducing competition and causing prices to rise. This process continues until firms reach a state where price equals average total cost, marginal cost, and marginal revenue, ensuring a long-run equilibrium.

Therefore, option (d), P=ATC=MR=MC, accurately represents the long-run equilibrium condition for perfect competition, reflecting the balance between price and cost for firms operating in a competitive market.

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Answer:

C

Explanation:

because when rocks break down they can form and once they form they can make more and even bigger rocks hopes this helps.

Answer:

filtration

Explanation:

1.put the mixture in a beaker

2.add water to the beaker and stir to dissolve salt

3.filter using a filter paper to have sand as the residue

4.Evaporate the water to remain with salt crystals

Answer:

the 2 means there are 2 al and the 3 means there are 3 o

Explanation:

I hope this helps

The correct pKa values for the substances are:
- CH₃CH₂COOH: 4.78
- NH₂CH₂COOH: 2.45
- SO₃H: 1.68

To assign the correct pKa value to each of the substances, we can match them as follows:

1. CH₃CH₂COOH: This is ethanoic acid (acetic acid), which has a pKa value of 4.78.
2. NH₂CH₂COOH: This is glycine, an amino acid, which has a pKa value of 2.45 for its carboxyl group.
3. SO₃H: This is a sulfonic acid group, which has a pKa value of 1.68.

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Answer:

-1300

Explanation:

Answer:

-1300

Explanation:

trust

Answer:

the particles must 1. collide

2. with sufficient energy

3. in proper orientation.

Explanation:

hope this helps

A simple machine which has mechanical advantange 4 and velocity ratio 5, the efficiency is 80%.

The effectiveness with which a machine transforms input energy into usable output energy is known as efficiency.

It is a proportion of the machine's useful work or energy output to its overall work or energy input. A percentage is a common way to describe effectiveness.

The efficiency of a simple machine, we can apply the formula:

Efficiency = (Mechanical Advantage / Velocity Ratio) × 100%

Given that

Mechanical advantage = 4 and

Velocity ratio = 5

We can substitute these values into the formula to find the asked efficiency.

Efficiency = (4 / 5) × 100%

Efficiency = 0.8 × 100%

Efficiency = 80%

Therefore, the efficiency of the simple machine is 80%.

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Answer:

the second object had a weaker charge

Explanation:

the charged object had a stronger charge and opposite to that of the uncharged hence causing attraction

Answer:

d

Explanation:

The second object had a weaker charge.

Answer:

Substances 1 and 2

Explanation:

an element only has 1 kind of atoms :3

Answer:

only the atoms present in the reactants can end up in the products.

Explanation:

If a piece of metal, such as calcium or magnesium, reacts with atmospheric oxygen, the product would be expected to have a greater mass than the reacting metal.

Every chemical reaction agrees with the law of conservation of mass.

According to this law, the mass of substances is conserved during the process of undergoing reactions. However, the mass could have been converted from one form to another during the reaction.

Going by this law, if substance A reacts with substance B to form a new substance AB, the mass of AB would be the addition of individual masses of A and B.

Thus, if a metal reacts with oxygen in the air, the mass of the product should be the mass of the metal plus the mass of the oxygen that reacts to form the product.

For example: \(2Mg + O_2 --- > 2MgO\)

The mass of MgO, in this case, would be the mass of the Mg and the mass of the \(O_2\). Thus, the mass of MgO would be greater than the mass of Mg.

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Explanation:

download the app topper

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mamama

The order to show the precipitation of halite from water are given below.

What is precipitation ?

Precipitation is the process of changing a dissolved substance from a super-saturated solution to an insoluble solid in an aqueous solution. Precipitate refers to the produced solid. The chemical agent that initiates the precipitation in an inorganic chemical process is referred to as the precipitant.

Step 1: Seawater starts to evaporate.

Step 2: Na cations and Cl anions concentrate as water molecules leave the liquid state and are left behind.

Step 3: Cl anions and Na cations move toward one another and start to bind.

Step 4: The resulting NaCl pairs join and start to form a crystal of halite, an ordered structure.

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Question:

Rank the following in order to show the precipitation of halite from water. Place the first event at the top and the last event at the bottom.

The other is the placement of hydrophobic amino acid residues within the interior of the protein.

What are hydrophobic amino acid?

Amino acid hydrophobicity is often defined by its partitioning between two liquid phases and this property can be important in downstream processing.

Amino acids are grouped according to what their side chains are like.

Glycine (Gly), alanine (Ala), valine (Val), leucine (Leu), isoleucine (Ile), proline (Pro), phenylalanine (Phe), methionine (Met), and tryptophan (Trp) have hydrophobic side chains.

These side chains are composed mostly of carbon and hydrogen, have very small dipole moments, and tend to be repelled from water.

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Answer:

plants

Explanation:

Answer:

it's volume also decrease

According to Newton's second law of motion, if force remains the same but mass increases, then acceleration will decrease.  Therefore, option (c) decrease is the correct answer.

This can be represented by the equation F=ma, where F is the force applied, m is the mass of the object, and a is the resulting acceleration. If the force is constant and the mass increases, the acceleration must decrease in order to maintain the equation's balance.   As the mass increases, it becomes more difficult for the force to accelerate the object at the same rate. The increased mass creates greater inertia, resisting changes in motion and resulting in a decrease in acceleration.

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Full Question ;

According to newton's second law of motion, if force remains the same but mass increases, then acceleration will ______

a. increase

b. stay the same

c. decrease

d. not be measurable

Answer:

In a chemical formula, the elements in a compound are represented by their chemical symbols, and the ratio of different elements is represented by subscripts.

Explanation:

33× 10⁻⁷ A current is needed to plate 5g of Copper metal on a cathode.

It states that during electrolysis, the amount of chemical reactions occurring at the electrodes under the influence of electrical energy is proportional to the amount of electricity conducted through the electrolyte.

n = zFQ

Where, n = moles of copper metal

n = 5/63.54

n = 0.078 moles

z = Number of electrons in the half-cell reaction

Cu²⁺ + 2e⁻ ⇔ Cu

z = 2

F = Faraday constant (96,485 A/mol)

Now, substitute the values in the equation mentioned above:

0.078 = 2 × 96,485 × Q

Q = 4.04 × 10⁻⁷ C

Since Q = I × t

Where, Q = charge

I = Current

t = Time (2 hours or 120 min.)

4.04 × 10⁻⁷ C = I × 120

I = 4.04 × 10⁻⁷/120

I = 33× 10⁻⁷ A

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the universe formed through the big bang explosion, all of the elements on Earth have been cooked for billions of years in stars and then released in the universe through super- nova explosions.

Answer:

carbon dioxide CO\({2}\)

Explanation:

Double Polar Covalent bonds with CO2

Explanation:

Keep in mind that CO2 is a nonpolar molecule

The entropy change in the system (ΔS) when one mole of water vaporizes at 100°C and a pressure of one atmosphere is 109.1 J/K.

To calculate the entropy change (ΔS) when one mole of water vaporizes at 100°C (373 K) and a pressure of one atmosphere, we can use the formula:

ΔS = ΔH° / T

where ΔH° is the enthalpy change (40.7 kJ) and T is the temperature in Kelvin (373 K).

Converting ΔH° to Joules (1 kJ = 1000 J):

ΔH° = 40.7 kJ * 1000 J/kJ = 40700 J

Now, we can plug in the values:

ΔS = 40700 J / 373 K = 109.1 J/K

So, the entropy change (ΔS) when one mole of water vaporizes at 100°C and a pressure of one atmosphere is 109.1 J/K.

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Answer:

Accuracy and precision are both important concepts in measurement, but they refer to different aspects of the measurement process.Accuracy refers to how close a measured value is to the true or expected value. In other words, accuracy is a measure of how well a measurement reflects reality. A measurement can be accurate even if it is not precise, as long as it is close to the true value.Precision, on the other hand, refers to the level of consistency or reproducibility of a set of measurements. In other words, precision is a measure of how well a measurement can be replicated. A measurement can be precise even if it is not accurate, as long as the values are consistent and repeatable.To illustrate the difference between accuracy and precision, consider the example of a dartboard. If a person throws several darts and they all land in the same spot, that person has high precision. However, if the darts all land far away from the bullseye, they have low accuracy. If a person throws several darts and they are spread out across the board, that person has low precision. However, if the darts are all clustered around the bullseye, they have high accuracy.In summary, accuracy is a measure of how close a measurement is to the true value, while precision is a measure of how consistent or reproducible a set of measurements is.

The number of particles formed by 1 mole of particles of sucrose (a molecular compound) dissolving in water is greater than the number of particles formed by 1 mole of particles of calcium chloride.

Sucrose is a molecular compound, which means it is made up of individual molecules that do not dissociate into ions when dissolved in water.

In contrast, calcium chloride is an ionic compound that dissociates into its constituent ions when dissolved in water.

Thus, when 1 mole of particles of calcium chloride dissolves in water, it will form 2 moles of ions (1 mole of Ca2+ ions and 2 moles of Cl- ions).

In conclusion, the number of particles formed when 1 mole of particles of sucrose (a molecular compound) dissolves in water is less than the number of particles formed when 1 mole of particles of calcium chloride (an ionic compound) dissolves in water.

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The statement that best completes the student table is Insects can walk on the surface of water. Option A

This statement describes the effect of water's property of surface tension on the environment. Surface pressure permits water atoms to stay together and frame a lean, cohesive layer on the surface, making a "skin" that creepy crawlies can walk on without sinking.

Surface tension  could be a property of water that emerges due to the cohesive powers between water atoms. Water particles have a propensity to draw in and adhere to each other, making a "skin" or cohesive layer on the surface of water. This cohesive constrain comes about in the next surface pressure compared to other fluids.

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The approximate current share price of ABC common stock can be calculated using the dividend discount model. The model takes into account the expected growth rate of earnings and dividends, the discount rate, and the most recent dividend.

The dividend discount model is commonly used to estimate the intrinsic value of a stock based on the present value of its expected future dividends. In this case, we have two years of extraordinary growth followed by a constant growth rate. To calculate the current share price, we need to determine the present value of dividends for the extraordinary growth period and the constant growth period.

First, we calculate the present value of dividends during the extraordinary growth period. We use the formula: Present Value = Dividend / (1 + Discount Rate)^t, where t is the number of years. In this case, we have two years of extraordinary growth, so we calculate the present value of dividends for each year.

Next, we calculate the present value of dividends during the constant growth period using the formula: Present Value = Dividend * (1 + Constant Growth Rate) / (Discount Rate - Constant Growth Rate).

Finally, we sum up the present values of dividends for both periods to obtain the approximate current share price.

Please note that the calculation involves several assumptions and approximations, and it's important to consider other factors and conduct a thorough analysis before making investment decisions.

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The concept ideal gas equation is used here to determine the molar mass of the unknown gas. The ideal gas law is also known as the general gas equation and it is an equation of the state of a hypothetical ideal gas.

The ideal gas equation is developed as a result of the combination of the Boyles law, Charles's law and Avogadro's law. The ideal gas equation has several limitations.

The ideal gas law is:

PV = nRT

Number of moles = Given mass / Molar mass = m / M

99.0kpa = 0.977 atm

68.0 C = 341 K

72.5 cm³ = 0.0725 L

PV = m / M RT

0.977 × 0.0725 = 0.207 / M 0.0821 × 341

0.977 × 0.0725 = 5.795 / M

M = 82.78 g / mol

Thus the molar mass is 82.78 g / mol.

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