According to the following reaction, how many grams of hydrogen iodide will be formed upon the complete reaction of 26.1 grams of iodine with excess hydrogen gas?
hydrogen (g) + iodine (s) hydrogen iodide (g)

Statement II: At the equivalence point of a weak acid-strong base titration, the solution is basic because all of the weak acid has been converted to its conjugate base, is true.Statement I: At the equivalence point of a strong acid-strong base titration, the solution is neutral and not acidic.

Therefore, statement I is false.Statement III: Adding a common ion to the solution will decrease the solubility of the insoluble salt is also true.Therefore, option (b) is the correct choice, i.e. III only. Note that the solubility product constant (Ksp) decreases when a common ion is added. This is known as the common-ion effect and it decreases the solubility of the insoluble salt.A titration is a technique used to determine the concentration of an unknown substance. An acid-base titration is a method used to determine the concentration of an acid or base by adding a known volume of a solution with a known concentration (standard solution) to an unknown volume of a solution with an unknown concentration.

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Answer:

False

Explanation:

Heat rises, but cold air doesn't. Cold air is heavier than warm air is.

The absolute age of rock layer g can be determined using radiometric dating, which is based on the decay of radioactive isotopes.

Radiometric dating involves measuring the ratio of an unstable isotope to its decay product and comparing it to a known constant. By measuring the ratio of the unstable isotope to its decay product, the absolute age of the rock can be determined. In the case of rock layer g, the absolute age can be determined by measuring the ratio of the radioactive isotopes within the rock and comparing it to the known decay rate.

The absolute age of rock layer g can then be determined by multiplying the decay rate by the ratio of the isotopes, resulting in an absolute age for the rock layer. The absolute age of rock layer g is therefore 800000000 years.

Radiometric dating is a powerful tool that is used to determine the absolute age of rocks and other materials. It is based on the decay of radioactive isotopes, which decay at a known rate.

By measuring the ratio of the unstable isotope to its decay product, the absolute age of the rock can be determined. While radiometric dating can be used to accurately determine the age of rocks, it is important to be aware of any potential errors or inaccuracies that can occur when using this method.

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4K+O2-----------2K2O

Dow Chemical would be best described as a multinational corporation in this scenario.

This is the type of corporation which are involved in controlling production of goods and services in at least one country different from that of residence.

Dow chemical is known to have a plant in Germany and Russia thereby making it a multinational corporation.

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Answer:

Plugging in the numbers we find the average force to be Favg=18,436 N, which is equivalent to 4124 lbs of force. The impulse delivered by this force is the product of the average force the the contact time, resulting in an impulse of 12.91 Ns.

Answer:

the force multiplied by the time the objects are in contact

Explanation:

took the quiz

It is included in it's purpose or function that it will move the components at different speeds. The dyes which cover slowly. ... if two substances have similar chemical or physical properties they will behave the same as they travel through the medium and thus will not be separated.

Explanation:

HOPE ITS HELP

AND MARK ME AS BRAINLIST PLEASE ;)

The problem is the relationship between speed and surface area

As they are moving with same speed they would have same surface area also same physical and chemical properties

This can't be separated by chromatography

The minimum volume of distilled water that is needed to completely dissolve a 3.0 g sample of CuCO3 at 25o c = 1538.5 liter of water.

Let s be the solubility of CuCO3  

CuCO3 ⇌ Cu+2 + CO32-

[Cu+2 ] = [CO32-] = s

Ksp [Cu+2 ] [CO32-] = s * s = s2

Ksp  = s2 = 2.5 * 10-10

s2 = 2.5 * 10-10

s = 1.58 * 10-5

s = 0.0000158 M

molar mass of CuCO3 = 63.5 + 12 + 3*16 = 123.5g

the solubility of CuCO3 in g/L is 123.5 * 0.0000158 = 1.95 * 10-3 g/L

1.95* 10-3 g in 1 litre of water

3 g will dissolve in 3/ (1.95 * 10-3) = 1538.5 litre of water.

Volume is a physical quantity that measures the amount of space occupied by an object, substance, or container. It is a derived unit of measurement, typically expressed in cubic units such as cubic meters, cubic centimeters, or cubic feet. The volume of a solid object can be calculated using its dimensions, such as length, width, and height.  

For irregularly shaped objects, their volume can be determined using methods such as water displacement. In fluids, the volume is typically measured in terms of the amount of space occupied by a given amount of the fluid, such as liters or gallons. The volume of a gas is often measured in terms of its displacement of a liquid or its expansion into a container.

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A statement which most likely explains why the early atomic models did not include the subatomic particles is that: D. subatomic particles could not be detected with the technology available.

Generally, an atom comprises three (3) distinct subatomic particles and these include the following

Ernest Rutherford performed a set of experiments on atoms in 1910 which has helped several scientists and researchers to better understand the structure of atoms by using gold foil.

In his experiment on structure of atoms, Rutherford directed a beam of small, positively charged particles referred to as alpha () particles at a very thin sheet of gold foil.

However, the early atomic models did not include the subatomic particles is that they could not be detected with the technology available at the time.

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Complete Question:

Ancient atomic models described the atom as a solid sphere with no charge. In the 1800's and 1900's, scientist discovered subatomic particles with charges inside the atoms.

Which statement most likely explains why the early models did not include the subatomic particles?

answer choices

atoms changed over time to develop the subatomic particles

not all atoms contain subatomic particles

subatomic particles move and cannot be counted

subatomic particles could not be detected with the technology available.

Answer: 7.1

Explanation:

Ion-dipole interaction is responsible for dissolution of KCI in water and the reason is that the electrostatic attraction between an ion and a molecule containing a dipole.

How does KCL dissolve in water?

The hydration energy of K+Cl- is greater than the lattice energy of KCl. Water molecules surround K+ and Cl-, yet these ions are kept apart and dissolved in the water.

What is ionic dipole force?

An ion's electrostatic attraction to a neutral molecule with a dipole produces an attractive force known as the ion-dipole force.

What are the example of ion dipole force?

Ion-dipole forces are at work in solutions when an ionic chemical is dissolved into a polar solvent, for as in a solution of table salt (NaCl) in water.

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The tensile stress required to fail a tensile coupon that has a 0.5 mm crack on one side is about 14.35 MPa.

Polymethyl methacrylate (PMMA) is a transparent thermoplastic often used as a lightweight or shatter-resistant alternative to glass. It is also used in casting, molding, and extrusion. The tensile strength of PMMA is roughly 65 MPa, but this value changes when a defect is present. The stress required to cause failure can be calculated using the single edge notch plate model to calculate the geometric factor Y.

The fracture toughness of PMMA is 1 MPa m¹/2, and the crack length is 0.5 mm. 12.5 mm is the width of the specimen.For a tensile coupon, the tensile stress required to fail it with a 0.5 mm crack on one side is calculated using the following formula:Stress = (K IC / Y √(πa)) × (b / W)where KIC is the fracture toughness, Y is the geometric factor, a is the crack length, b is the specimen width, and W is the specimen width. For a PMMA coupon with a 0.5 mm crack, a is 0.5/2 = 0.25 mm. Y = 1.12, according to the single edge notch plate model. Substituting the given values, the stress required to fail the coupon is:Stress = (1 MPa m¹/² / 1.12 √(π x 0.25 mm)) × (12.5 mm / 12.5 mm)≈ 14.35 MPa.

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Answer:

40

Explanation:

Porque yo creo que asi )          :

Answer: Basilosaurus is a prehistoric whale which lived approximately 40 million to 34 million years ago during the Late Eocene Period.

Explanation:

Answer:

11. I think the answer is, Both humans and whale embryos have a tail and a backbone (I'm not sure).

12. Basilosaurid, any member of the family Basilosauridae, an early group of whales that lived from the middle Eocene to the late Oligocene Epoch (about 41 million to 23 million years ago).

13.  Protocetids had long snouts, large eyes, and their nasal opening was farther caudally than in earlier archaeocetes.

Hope this helps! :D

Answer:

If a body is accelerated by 10m/s^2, it means that the body's speed (or velocity to be precise) is increasing by 10m/s every second. That is, if the initial ...

Answer:

Both types of waves transfer energy

Explanation:

I think that's right

Electromagnetic waves and sound waves  both types of waves can transfer energy.

The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.

The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.

In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.

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In a liquid-liquid extraction (LLE) system with loratadine and pseudoephedrine sulfate, the choice of organic and aqueous phases is crucial for efficient separation.

Loratadine is a non-polar compound, while pseudoephedrine sulfate is more polar due to the presence of a sulfate group. To achieve effective separation, we need to choose a suitable organic phase and aqueous phase.

For the organic phase, a non-polar solvent such as diethyl ether, ethyl acetate, or chloroform can be used. These solvents have good solubility for loratadine. The non-polar organic phase will extract loratadine from the mixture, allowing for separation from the aqueous phase.

As for the aqueous phase, we need to choose a polar solvent that will selectively extract pseudoephedrine sulfate. Aqueous solutions of acids like hydrochloric acid (HCl) or sulfuric acid (H2SO4) can be used. The acidic conditions protonate the pseudoephedrine sulfate, making it more soluble in the aqueous phase.

To perform the extraction, the mixture of loratadine and pseudoephedrine sulfate is added to the LLE system consisting of the organic phase (non-polar solvent) and the aqueous phase (acidic solution). The mixture is then vigorously shaken to ensure thorough mixing and extraction.

After shaking, the phases are allowed to separate, with the more dense aqueous phase settling at the bottom and the less dense organic phase on top. The layers can be carefully separated, and each phase can be further processed to isolate the desired compounds.

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The mass percentage (m/m%) of copper in the ornament is 70.83%.

Mass percentage is one way of representing the concentration of an element in a compound or a component in a mixture.

Mass percentage is calculated as the mass of a component divided by the total mass of the mixture, multiplied by 100%.

According to this question, Brass is an alloy of copper and zinc. If a 1.20 kg ornament made of brass contained 850 g of copper, the mass percentage of copper in the brass is calculated as follows:

Mass percentage = (850g ÷ 1200g) × 100

Mass percentage = 70.83%

Therefore, 70.83% is the mass percentage of copper in the brass.

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The balanced chemical equation for the reaction between ethane (C₂H₆) and molecular oxygen (O₂) to produce carbon dioxide (CO₂) and water (H₂O) is :-     C₂H₆ + 7O₂ → 2CO₂ + 3H₂O

Steps to write balanced chemical equation of reaction between ethane and molecular oxygen :-

1: In the balanced equation, there are 2 molecules of ethane and 7 molecules of oxygen on the left side of the equation, which means there are 14 atoms of carbon, 18 atoms of hydrogen, and 14 atoms of oxygen in total.

2:On the right side of the equation, there are 2 molecules of carbon dioxide and 3 molecules of water, which means there are 2 atoms of carbon, 6 atoms of hydrogen, and 8 atoms of oxygen in total. The balanced equation must ensure that the number of atoms of each element is the same on both sides of the equation.

3: To balance the equation, the coefficients 2 and 7 are used to balance the number of atoms of carbon and oxygen, respectively. After balancing the equation, there are 4 atoms of carbon, 12 atoms of hydrogen, and 14 atoms of oxygen on both sides of the equation, which means the equation is balanced.

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Answer:

Benzene

Explanation:

You have to find the freezing point for each of these (make sure they're in Celsius). You might want to double check these but:

Benzene: 5.5

Water: 0

Butane: -138

Nitrogen: -210

The substances that will solidify before the temperature reaches 0°C is benzene. The correct option is A.

Freezing, also known as solidification, is a phase transition that occurs when the temperature of a liquid falls below its freezing point.

If the intermolecular forces between its molecules are strong, the freezing point is high.

When the forces are weak, the freezing point is low. The freezing point of a liquid or the melting point of a solid occurs when the solid and liquid phases are in equilibrium.

Pure benzene has a freezing point of 5.48 degrees Celsius. Because of the salt in it, fresh water freezes at 32 degrees Fahrenheit, but seawater freezes at around 28.4 degrees Fahrenheit.

Thus, as per the given scenario, the correct option is A.

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Answer:

convection (I am pretty sure, I am sorry if it isnt right)

Explanation:

The 85th percentile of blood pressure readings is approximately 137.64. a. To calculate the z-score for a blood pressure reading of 140, we can use the formula:

z = (x - μ) / σ

where x is the value (140 in this case), μ is the mean (121), and σ is the standard deviation (16).

Substituting the values into the formula:

z = (140 - 121) / 16

z ≈ 1.19 (rounded to two decimal places)

b. To find the proportion of Canadians with high blood pressure, we need to calculate the area under the normal distribution curve for values above 140. This can be done by finding the cumulative probability using the z-score.

Using a standard normal distribution table or a calculator, we can find that the cumulative probability corresponding to a z-score of 1.19 is approximately 0.881.

Therefore, the proportion of Canadians with high blood pressure is approximately 0.881 (rounded to four decimal places).

c. To find the proportion of Canadians with systolic blood pressure in the range from 100 to 140, we need to calculate the area under the normal distribution curve between these two values.

Using the z-scores corresponding to 100 and 140, we can find the cumulative probabilities for each value. The cumulative probability for a z-score of -1.25 (corresponding to 100) is approximately 0.105, and the cumulative probability for a z-score of 1.19 (corresponding to 140) is approximately 0.881 (as calculated in part b).

The proportion with systolic blood pressure between 100 and 140 is the difference between these two probabilities:

Proportion = 0.881 - 0.105 ≈ 0.776 (rounded to four decimal places)

d. The 85th percentile represents the value below which 85% of the blood pressure readings fall. To find the 85th percentile, we need to determine the z-score that corresponds to an area of 0.85 under the normal distribution curve.

Using a standard normal distribution table or a calculator, we can find that the z-score corresponding to an area of 0.85 is approximately 1.04.

To find the actual blood pressure reading at the 85th percentile, we can use the z-score formula:

x = μ + (z * σ)

Substituting the values:

x = 121 + (1.04 * 16)

x ≈ 137.64

Therefore, the 85th percentile of blood pressure readings is approximately 137.64.

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Answer:

54.5 L of nitrogen monoxide, NO.

Explanation:

The balanced equation for the reaction is given below:

2CO + 2NO —> N₂ + 2CO₂

From the balanced equation above,

2 L of NO reacted to produce 2 L of CO₂.

Finally, we shall determine the volume of nitrogen monoxide, NO, required to produce 54.5 L of carbon dioxide, CO₂. This can be obtained as follow:

From the balanced equation above,

2 L of NO reacted to produce 2 L of CO₂.

Therefore, 54.5 L of NO will also react to produce 54.5 L of CO₂.

Thus, 54.5 L of nitrogen monoxide, NO, is needed for the reaction.

Answer:

54.5

Explanation:

Answer:

Pressure inside soda can = 5.56 atm

Explanation:

Given data:

Initial volume = 1250 mL

Initial pressure = 1.00 atm

Final volume = 225  mL

Final pressure = ?

Solution:

The given problem will be solved through the Boyle's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

1.00 atm × 1250m L =  P₂ × 225 mL

P₂ =  1250 atm. mL/ 225 mL

P₂ = 5.56 atm

We call water a universal solvent because it can dissolve many different substances.

Water acts as a solvent due to the polarity of each water molecule. Water molecules have a polar arrangement of oxygen and hydrogen atoms i.e. one side (hydrogen) of each water (H2O) has a slight positive electrical charge and the other side (oxygen) had a slight negative charge.

A substance that displaces most compounds is known as a universal solvent. Because it dissolves more chemicals than any other solvent, water is known as the universal solvent. But no solvent, not even water, can dissolve all chemicals. Like typically dissolves like. This indicates that polar compounds, such salts, are dissolved by polar liquids. Nonpolar solvents can dissolve organic molecules like lipids and other nonpolar substances.

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Answer:

D. Because it can dissolve many different substances.

Explanation:

Answer:

The object is moving with uniform acceleration

Explanation:

Acceleration is defined as the change of speed with time. Hence, we define acceleration as ds/dt.

The slope of a speed/time graph gives us the acceleration of the moving object.

An object is said to move with uniform acceleration when the speed increases by equal amounts in equal time intervals as in the straight line speed/time graph shown in the question