The largest ruby in the world is 10.9 cm long, 9.10 cm wide, and 5.80 cm thick, giving it an overall volume of 575 cm3. If the density of ruby—a form of aluminum oxide—is 3.97 g/cm3, what is the mass of the largest ruby?

C/ If Fe is greater than Fg, the negatively charged oil droplet will move freely toward the negatively charged plate.

In the Millikan oil droplet experiment, the negatively charged oil droplets are subjected to an electric field created by the charged plates. The electric force (Fe) acts on the oil droplet in a direction opposite to the gravitational force (Fg). When Fe is greater than Fg, the electric force overcomes the gravitational force, causing the negatively charged oil droplet to experience an upward force. As a result, the oil droplet moves freely upward toward the negatively charged plate.

Option B is incorrect because if Fe is equal to Fg, the forces balance each other, resulting in a stationary droplet. However, the question states that Fe is increased until it is greater than Fg, implying that the droplet is no longer stationary but moves in response to the electric force.

Therefore, option C is the correct answer, as it describes the effect of an electric field on the motion of a negatively charged oil droplet in the Millikan oil droplet experiment.

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-1.09'C is the change in freezing point

“Freezing point depression” depends on the solvent and the molar concentration of the solute.

Sulfide is highly basic, consequently

K2S

completely and irreversibly hydrolyzes in water according to the following equation:

K2S+H2O→KOH+KSH

Freezing, also known as solidification, is a phase transition where a liquid turns into a solid when its temperature is lowered below its freezing point.

the temperature at which a liquid solidifies specifically : the temperature at which the liquid and solid states of the substance are in equilibrium at atmospheric pressure : melting point the freezing point of water is 0° Celsius or 32° Fahrenheit.

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Answer:1.0881

Explanation:

Tension force is the force applied on the ball in a horizontal direction or along the that makes the ball in motion

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Answer:

See answer below

Explanation:

AS we know that the valence for those metals X, Y, and Z are 1, 2 and 3, we can determine the formula of each compound.

1. Hydroxides.

An hydroxide is formed when an oxyde of a metal reacts with water. When this happens, the general molecular formula is:

Meₐ(OH)ₙ

Where:

a: valence or charge of the hydroxide (Which is -1)

n: valence of the metal.

Following this, the formula for X, Y and Z would be:

XOH

Y(OH)₂

Z(OH)₃

2. Sulphates

Sulphates follow a similar rule of hydroxide in the general molecular formula, but instead of having a charge of -1, it has a charge of -2 so:

Mₐ(SO₄)ₙ

So, following the rule:

X₂SO₄

Y₂(SO₄)₂ ------> YSO₄

Z₂(SO₄)₃

3. Hydrogens

Following the same rule as the previous, hydrogens works with a charge of -1, so:

MₐHₙ

Then:

XH

YH₂

ZH₃

4. Carbonates.

This follows the same rule as sulphates, with the same charge so:

Mₐ(CO₃)ₙ

Then:

X₂CO₃

YCO₃

Z₂(CO₃)₃

5. Nitrates

Follow the same rule as the hydroxides, with the same charge of -1.

Mₐ(NO₃)ₙ

Then:

XNO₃

Y(NO₃)₂

Z(NO₃)₂

6. Phosphates

In the case of phosphates, these have a charge of -3 so:

Mₐ(PO₄)ₙ

Then:

X₃PO₄

Y₃(PO₄)₂

Z₃(PO₄)₃ ----> ZPO₄

Hope this helps

Partial pressure of the gas B is 0.23 atm.

Let us note that if there is a mixture of gases that can be found in a particular vessel then we must know that each of the gases that are there would exert its own pressure on the walls of the container.

Now we know that the total number of moles that is present =

2.5 + 1.2 + 1.0 = 4.7 moles. The total pressure of the gases that we have in the system is about 0.9 atm.

We know that;

Partial pressure = Mole fraction * Total pressure

Partial pressure of B is;

1.2/4.7 * 0.9

= 0.23 atm

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The most accurate measurement for the length of an object of 15.0 m long is 15.2m. Option (B) is correct.

Accuracy is the measurement tolerance of the instrument in industrial instrumentation. It refers to the limits of the errors made when the instrument is used. Resolution is simply how fine the measuring instrument is set to read to tenths, hundreds, thousands, or whatever.

Measurement can be explained as the process of numerical evaluation of a dimension with standard measuring instruments. The elements of the measuring system involve instrumentation, calibration standards,  human operator limitations, environmental influence, and features of the workpiece.

Given, the length of the object is equal to 15 meters. After being measured with an apparatus the only lies closest to 15 m can be considered as the most accurate measurement.

Therefore, the length of 15.2 m is the most accurate measurement for the length of an object with an actual length 15 m.

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when the temperature of an isolated system decreases while the surroundings of a non-isolated system gains heat.

Answer:

B 48.72 g

Explanation:

i hope this helps

The statement "Titanium's corrosion resistance is so strong that even titanium with oxygen impurities does not show a reduction in corrosion resistance" is true as Titanium is a highly corrosion-resistant metal, which is attributed to its ability to form a stable, protective oxide layer on its surface.

This layer acts as a barrier, preventing the penetration of corrosive agents and thus maintaining the metal's integrity.

Even when oxygen impurities are present in titanium, the corrosion resistance remains strong. This is because the impurities do not significantly affect the formation of the oxide layer, which is primarily responsible for the metal's resistance to corrosion. Additionally, the presence of oxygen can actually increase the strength and hardness of titanium, further contributing to its durability.

In summary, titanium's corrosion resistance remains strong even with the presence of oxygen impurities, due to the protective oxide layer that forms on its surface and the potential for increased strength and hardness.

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Answer:

Released energy

Explanation:

Answer:

The answer is: Released energy

Hope this helped <33

Explanation:

Answer:

is a way of presenting information about the chemical proportions of atoms

Explanation:

gram of NO=5

2NO = 2N+O2

2×2.50=x

x=5

The mass of nitrogen monoxide  produced from 2.5 grams of oxygen is 1.875 grams

4NH₃ + 50₂ → 4NO + 6H₂0

The limiting reagent is 0₂ because the least moles of this are used in the reaction.

Therefore, it will determine the amount of product formed.

From the chemical reaction above

10(16) g of 0₂ gives (4×14 + 4×16) g of NO

2.50 g of 0₂ will give ? of NO

cross multiply

mass of NO formed = 2.50 × 120 / 160

mass of NO formed = 300 / 160

mass of NO formed = 1.875 grams

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The glycemic index (GI) is a measure of how quickly carbohydrates are digested and absorbed by the body, causing a rise in blood sugar levels. The lower the GI, the slower the digestion and absorption of carbohydrates, and the less of an impact they have on blood sugar levels.

Among carbohydrate molecules, fructose has the lowest glycemic index. This is because fructose is a simple sugar that is metabolized differently than other carbohydrates. It is absorbed more slowly in the intestine, and its metabolism does not require insulin. This means that fructose has a minimal effect on blood sugar levels, making it a good choice for people with diabetes or those who want to avoid rapid spikes in blood sugar.

However, it is important to note that consuming large amounts of fructose can have negative health effects, such as contributing to insulin resistance, fatty liver disease, and obesity. Therefore, it is important to consume fructose in moderation and as part of a balanced diet.

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The volume of the stock solution is 0.18

0.70*0.80/0.30 =0.18

Divide the quantity of moles of glucose by the molarity of the stock solution to calculate the volume of stock solution required.

(C1) (V1) = (C2) (V2) is the formula for figuring out a dilution.

A solution is made up of a solute and a solvent, and the total volume of a solution is equal to the sum of the volumes of both the solute and the solvent that it contains.

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Answer:

Nickel has a total of 28 electrons.

Explanation:

\(2C_2H_6 + 7O_2\) → \(4CO_2 + 6H_2O\) is the balanced equation for the complete combustion of ethane.

The chemical equation in which the number of atoms of each element is equal in the reactant and the product of the reaction is called a balanced chemical equation.

\(2C_2H_6 + 7O_2\) → \(4CO_2 + 6H_2O\) is the balanced equation for the complete combustion of ethane.

Reactants contain 4 carbon atoms, 12 hydrogen atoms and 14 oxygen atoms. The same is true for products too.

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The equation for the combustion of ethane is 2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O .

Combustion, or burning, is a high-temperature exothermic redox chemical reaction between a fuel and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke.

Balanced equation for the combustion of ethane :

2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O .

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The number of particles of water you drink if you drink 64 oz., or 1893 grams, of water in a day is 6.32 x 10²⁵ particles.

In order to determine how many particles of water you consume if you drink 64 oz of water in a day, we need to convert the given mass of water to moles.

Mass of water = 1893 g

Molar mass of water (H₂O) = 18.0 g/mol

Number of moles of water = mass / molar mass = 1893 g / 18.0 g/mol = 105 mol

Now, we can use Avogadro's number (6.02 x 10²³ particles/mol) to determine the number of particles:

Particles of water = number of moles x Avogadro's number = 105 mol x 6.02 x 10²³ particles/mol = 6.32 x 10²⁵ particles

Therefore, if you drink 64 oz or 1893 grams of water in a day, you would consume approximately 6.32 x 10²⁵ particles of water.

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To produce one molecule of glucose, 6 molecules of carbon dioxide (\(CO_{2}\)), 18 molecules of adenosine triphosphate (ATP), and 12 molecules of nicotinamide adenine dinucleotide phosphate (NADPH) are required.

Glucose, a six-carbon sugar, is synthesized through the process of photosynthesis in plants. It involves the Calvin cycle, which incorporates carbon dioxide, ATP, and NADPH to produce glucose. For each molecule of glucose formed, 6 molecules of carbon dioxide are required.

The energy needed for glucose synthesis is provided by ATP, which is an energy-rich molecule. In the Calvin cycle, the synthesis of one glucose molecule requires 18 molecules of ATP.

NADPH, a coenzyme involved in energy transfer reactions, is required for the reduction of carbon dioxide during the Calvin cycle. In the process, 12 molecules of NADPH are utilized to produce one molecule of glucose. These components play crucial roles in capturing and storing energy, as well as providing carbon atoms for the formation of glucose, which serves as a vital energy source for organisms.

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The new volume of the oxgen gas as the temperature is increased is 171.3ml.

Given the data in the question;

Charles's law states that "the volume occupied by a definite quantity of gas is directly proportional to its absolute temperature.

It is expressed as;

\(\frac{V_1}{T_1} = \frac{V_2}{T_2}\)

To determine the new volume of the oxgen gas as the temperature is increased, we substitute our given values into the expression above.

\(\frac{V_1}{T_1} = \frac{V_2}{T_2}\\ \\ \frac{0.095L}{305K} = \frac{V_2}{550K}\\\\V_2 * 305K = 0.095L * 550K\\\\V_2 * 305K = 52.25LK\\\\V_2 = \frac{52.25LK}{305K} \\\\V_2 = 0.1713L\\\\V_2 = 171.3ml\)

Therefore, the new volume of the oxgen gas as the temperature is increased is 171.3ml.

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The concentration of fluoroacetic acid in a solution is \(5.69*10^-^3M .\)

What is dissociation of acids?

In an aqueous  solution, an acid dissociates into hydrogen ions (H+) and anions. The molecules of a strong acid dissociate, resulting in a high concentration of H+.

It is calculated by:

Ka = \(\frac{[A^-][H^+]}{[H^+]}\)

The dissociation of HCl is given as follows:

HCl ⇄ \(H^+\) + \(Cl^-\)

The concentration of H+ ion = 0.00275 M.

So,

pH = -log\([H^+]\)

pH =  -log\([0.00275M]\)

pH = 2.56

According to question

pH of HCl = pH of fluoroacetic acid

The dissociation of fluoroacetic acid is given as follows:

\(FCH^2COOH\) ⇄ \(FCH_2COO^-\) + \(H^+\)

Ka = \(\frac{[FCH^2COO^-][H^+]}{FCH^2COOH}\)

pKa = -log [Ka]

2.59 = -log [Ka]

Ka = \(2.57*10^-^3\)

According to ICE table:

            \(FCH^2COOH\) ⇄ \(FCH_2COO^-\) + \(H^+\)

I                        C               0                       0

C                      -x               +x                     +x

E                     C-x               x                        x

According to the equation:

Ka = \(\frac{[FCH^2COO^-][H^+]}{FCH^2COOH}\)

\(2.57*10^-^3\) = \(\frac{x.x}{C-x}\)

\(2.57*10^-^3\) = \(\frac{x^2}{C-x}\)

x = 0.00275M

\(2.57*10^-^3\) = \(\frac{0.00275^2}{C-0.00275}\)

Solving for C,

C = 0.00569M or  \(5.69*10^-^3M .\)

The concentration of fluoroacetic acid in a solution is \(5.69*10^-^3M .\)

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Answer:

\(1oz=29.589ml\)

Explanation:

From the question we are told that:

Initial Volume \(v_1=250ml\)

Final Volume \(v_2=8.45oz\)

Generally the equation for one ounce is mathematically given by

 \(1oz=\frac{v_1}{v_2}\)

Therefore

 \(1oz=\frac{250}{8.45}\)

 \(1oz=29.589ml\)

If a doctor's order is 125 mg of ampicillin. The liquid suspension on hand contains 250 mg/5.0 mL, then 250 milliliters of the suspension are required.

To determine the number of milliliters of the suspension required, you can use the following formula:

Milliliters of suspension = (Ordered dose in mg) / (Strength of suspension in mg/mL)

Plugging in the values given in the problem, we get:

Milliliters of suspension = 125 mg / (250 mg/5.0 mL)

Simplifying the expression in the denominator by dividing both numerator and denominator by 250, we get:

Milliliters of suspension = 125 mg / (1/2) mL

Multiplying the numerator and denominator by 2 to simplify the expression in the denominator, we get:

Milliliters of suspension = 125 mg x 2 / 1 mL

Simplifying the numerator, we get:

Milliliters of suspension = 250 / 1 mL

Milliliters of suspension = 250 mL

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Nonspontaneous reactions are those that require a continuous input of energy to proceed and are not favored thermodynamically.

A reaction that would be nonspontaneous at any temperature is one with a positive change in Gibbs free energy (ΔG). This occurs when the change in enthalpy (ΔH) is positive and the change in entropy (ΔS) is negative. In other words, the reaction is endothermic and results in a decrease in disorder.

In summary, a reaction that is nonspontaneous at any temperature has a positive ΔG, resulting from a positive ΔH (endothermic) and a negative ΔS (decrease in disorder).

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Answer:

to figure out how to sustain large populations in this environment.

Answer:

The maya needed to create innovative ways to manage water because they lived in a dry climate.

They needed to find ways to collect water and store it for later use.

Explanation:

There were downpours during the unpredictable wet season and there was a long dry season

Not many rivers

Answer:

they're losing electrolytes

Explanation:

When athletes sweat, they're losing electrolytes primarily in the form of sodium (Na+) and chloride (Cl-), so when you start to replace lost fluids, ahtletes should replace the electrolytes as well. Potassium (K+), Magnesium (Mg2+) and Calcium (Ca2+) are electrolytes also lost through sweating.

The difference in boiling points for oxygen and carbon dioxide is due to their respective molecular structures.

Oxygen is a diatomic molecule, meaning it contains two oxygen atoms bonded together, while carbon dioxide is a triatomic molecule, meaning it contains three atoms (one carbon and two oxygen). This difference in number of atoms leads to differences in boiling point, as oxygen has a boiling point of -183°C (90K) and carbon dioxide has a boiling point of -78°C (215K). To further explain the difference in boiling points, it’s important to understand the intermolecular forces at play. When molecules are cooled to a certain temperature, they will enter into a liquid state. At this time, the molecules’ kinetic energy is outweighed by the attractive forces between them. Oxygen is able to liquefy at a lower temperature than carbon dioxide because it has weaker intermolecular forces.

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The 95% confidence interval estimate for the mean wake time with the drug treatment is between 76.6 min and 89.6 min.

The 95% confidence interval estimate is calculated based on the sample mean and the standard deviation. In this case, the sample mean wake time after treatment is 83.1 min, and the standard deviation is 20.7 min. With these values, we can construct the confidence interval estimate.

The formula for calculating the confidence interval estimate is:

CI = sample mean ± (critical value * standard deviation / square root of sample size)

Using a 95% confidence level, the critical value is 1.96. The sample size in this case is 21.

Plugging in the values:

CI = 83.1 ± (1.96 * 20.7 / √21)

Simplifying the equation:

CI = 83.1 ± 8.08

Therefore, the 95% confidence interval estimate for the mean wake time with the drug treatment is between 76.6 min (83.1 - 8.08) and 89.6 min (83.1 + 8.08).

This result suggests that the mean wake time before the treatment, which was 105.0 min, is outside the confidence interval estimate. The confidence interval estimate does not include the value of 105.0 min, indicating that the mean wake time with the drug treatment is significantly different from the mean wake time before the treatment.

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The number of molecules of iron (iii) oxide F₂O₃ that can be produced from 13.5 moles of Fe is 4.06×10²⁴ molecules

4Fe + 3O₂ —> 2F₂O₃

From the balanced equation above,

4 moles of Fe reacted to produce 2 moles of F₂O₃.

Therefore,

13.5 moles of Fe will react to produce = (13.5 × 2) / 4 = 6.75 moles of F₂O₃

From Avogadro's hypothesis,

1 mole of F₂O₃ = 6.02×10²³ molecules

Therefore,

6.75 moles of F₂O₃ = 6.75 × 6.02×10²³

6.75 moles of F₂O₃ = 4.06×10²⁴ molecules

Thus, 4.06×10²⁴ molecules of F₂O₃ were obtained from the reaction

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