How many hydrogen molecules are in 1.2 moles of hydrogen?

The Ka for this acid is 2.37 x 10⁻⁴.

To solve this problem, we can use the relationship between pH and Ka for a weak acid:

From the given pH, we can calculate the [H⁺] concentration:

We can assume that all of the acid dissociates in water, so [HA] = 1.28 M. Therefore:

Therefore, the Ka value for the monoprotic acid is 2.37 x 10⁻⁴.

A monoprotic acid is an acid that can donate only one proton or hydrogen ion (H⁺) per molecule in an aqueous solution. Examples of monoprotic acids include hydrochloric acid (HCl), nitric acid (HNO₃), acetic acid (CH₃COOH), and formic acid (HCOOH).

When dissolved in water, these acids dissociate to produce one hydrogen ion (H⁺) and one negative ion, such as chloride (Cl⁻) for HCl, nitrate (NO₃⁻) for HNO₃, acetate (CH₃COO⁻) for CH₃COOH, and formate (HCOO⁻) for HCOOH. Monoprotic acids are often used in chemistry and biology experiments, as they are easier to handle and analyze than polyprotic acids, which can donate multiple protons.

To learn more about monoprotic acid, here

https://brainly.com/question/22497931

#SPJ4

Answer:  Shaun must consume 6 more g of protein to reach the required amount.

Explanation:

Given : Recommended amount of protein = 200 calories

Now 4 calories = 1 gram of protein

Thus 200 calories = \(\frac{1}{4}\times 200=50\) g of protein.

Calories consumed per day by Shaun = 176 calories

176 calories =  \(\frac{1}{4}\times 176=44\) g of protein.

Thus Shaun need to consume = (50-44) g = 6 of protein to reach the required amount.

Shaun must consume 6 more g of protein to reach the required amount.

The density of water decreases as it becomes warmer, more space. When comparing two samples same salinity of water, sample with the higher temperature will have more volume and hence be less dense.

The accumulation of salt from rainfall over a long period of time or the weathering of rocks are two examples of natural processes that contribute to primary salinity.

By running an electric current between a salinity meter's two electrodes in a sample of soil or water, it is possible to determine the salinity of both water and soil. The quantity and make-up of dissolved salts affect the electrical conductivity, or EC, of a soil or water sample.

To know more about Salinity visit:

https://brainly.com/question/14575146

#SPJ13

Answer:

10.4 hours

Explanation:

Now from;

0.693/t1/2 = 2.303/t log (No/N)

t1/2= half life of the radioactive isotope

t = age of the radioactive isotope

No= Original amount of radioactive isotope

N= amount of radioactive isotope left after time t

Substituting values;

N = 0.0625No

0.693/2.6 = 2.303/t log (No/0.0625No)

0.693/2.6 = 2.303/t log (1/0.0625)

0.267 = 2.303/t * log 16

0.267 = 2.773/t

t = 2.773/0.267

t = 10.4 hours

Using complete sentences, I will explain how a set of experimental data can be accurate but not precise, precise but not accurate, and neither accurate nor precise.

a. If a set of experimental data is accurate but not precise, it means that the data is close to the true value or target, but the measurements or values are not consistent or repeatable. In other words, the data points may be scattered or vary widely from each other, but their average or mean value is close to the true value. This can happen due to random errors or uncertainties in the measurement process.

b. On the other hand, if a set of experimental data is precise but not accurate, it means that the measurements or values are consistent or repeatable, but they are not close to the true value or target. In this case, the data points may cluster tightly around a single value, but that value may be different from the expected or true value. This can happen due to systematic errors or biases in the measurement process.

c. Finally, if a set of experimental data is neither accurate nor precise, it means that the measurements or values are neither close to the true value nor consistent or repeatable. The data points may be scattered or vary widely from each other, and their average or mean value may not be close to the true value. This can happen due to a combination of random errors and systematic errors in the measurement process.

In summary, accuracy refers to how close the measured values are to the true value or target, while precision refers to the consistency or repeatability of the measurements. A set of experimental data can be accurate but not precise, precise but not accurate, or neither accurate nor precise, depending on the combination of these factors.

Learn more about measurement process

brainly.com/question/29898854

#SPJ11

The correct answer is b. Phytoplankton. When a body of water becomes acidified, it can affect the pH levels, making it difficult for certain species to survive.

Phytoplankton, which are important producers at the base of the food chain in aquatic ecosystems, are particularly sensitive to changes in pH and are often the first to disappear. This can have a cascading effect on the entire ecosystem, as other species that depend on phytoplankton for food may also struggle to survive. When a body of water becomes acidified, the pH level decreases significantly and the water becomes more acidic. This causes a disruption in the aquatic environment, with the most sensitive species being the first to suffer.

To learn more about acidified click here https://brainly.com/question/28529228

#SPJ11

Answer:

The answer is

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \)

From the question

mass = 12.9 g

volume = 8 cm³

The density of the block is

\(density = \frac{12.9}{8} \\ = 1.6125\)

We have the final answer as

Hope this helps you

Answer:

The answer is

D)

radiant, electrical, mechanical

Explanation:

The compound that will form the most intensely colored 0.01 M aqueous solution will depend on the specific compound and its ability to exhibit color in solution.

The compound that will form the most intensely colored 0.01 M aqueous solution will depend on the specific compound and its ability to exhibit color in solution. Without knowing the specific compounds being considered, it is difficult to provide a definitive answer. Different compounds can exhibit a wide range of colors based on their molecular structure and electronic transitions.

In general, compounds with highly conjugated systems or transition metal complexes tend to exhibit intense colors in solution. These compounds often have extended delocalized π-electron systems that allow for absorption of light in the visible range, resulting in the observed color.

To determine which compound would form the most intensely colored solution, it would be necessary to consider the specific compounds and their molecular structures, including the presence of conjugated systems or transition metal ions. Conducting experiments or consulting references specific to the compounds in question would provide more accurate information regarding their coloration in aqueous solution.

To learn more about ions, click here: brainly.com/question/10942834

#SPJ11

The given statement "Carbon in the ocean originates from the atmosphere" is true because Carbon is one of the most vital elements on Earth and is involved in various biogeochemical cycles, including the carbon cycle.

For more questions on the carbon cycle

https://brainly.com/question/8626856

#SPJ8

The correct question would be as

Carbon in the ocean originates from the atmosphere. Please select the best answer from the choices provided. True or False

The number of moles of gas is the same on both sides, the change in volume will not affect the equilibrium position of the reaction. The answer is B) There is no change because there are the same number of moles of gas on both sides.

To determine the change that will occur when the container is shrunk from 9.0 L to 3.0 L for the given reaction:

51.8 kJ + H₂(g) + I₂(g) → 2HI(g)

We need to consider the number of moles of gas on each side of the reaction.

On the left side, there are 2 moles of gas (H₂ and I₂), while on the right side, there are 2 moles of gas (2HI). Both sides have an equal number of moles of gas.

Therefore, the correct answer is B) There is no change because there are the same number of moles of gas on both sides.

For more details regarding the number of moles, visit:

https://brainly.com/question/20370047

#SPJ1

Answer:

the analysis of the relationships between different physical quantities by identifying their base quantities and units of measure and tracking these dimensions as calculations or comparisons are performed.

Explanation:

Rutherford conclusion was: Inside of the gold atom consists of empty spaces.

Rutherford theorized that atoms have their charge concentrated in a very small nucleus.

This was famous Rutherford's Gold Foil Experiment: he bombarded thin foil of gold with positive alpha particles (helium atom particles, consist of two protons and two neutrons).

Rutherford observed the deflection of alpha particles on the photographic film and notice that most of alpha particles passed straight through foil.

That is different from Plum Pudding model, because it shows that most of the atom is empty space.

More about Rutherford model: brainly.com/question/6708627

#SPJ4

Answer:

\({ \rm{2H {}^{ + } _{(aq)} + CO {}^{2 - } _{3(aq)} \: \: \: {}^{ { \huge{\dashrightarrow} }} _{ \huge{ \dashleftarrow}} }} \: \: { \rm{H _{2} CO _{3(aq)} }}\)

Answer:

gravity equation.

Explanation:

use this gravity equation

F= G(m1*m2/d²)

Answer:

Explanation:

Here, we want to get the correct electronic configuration for Au

The element gold has 79 electrons

We have the configuration as follows:

All of these processes change the atomic numbers. The correct option is (E).

Each of the listed processes involves a change in the atomic number of an atom. Let's briefly explain each process:

A. Alpha emission: In alpha emission, an atomic nucleus emits an alpha particle, which consists of two protons and two neutrons. As a result, the atomic number decreases by 2 because two protons are lost from the nucleus.

B. Beta emission: In beta emission, a neutron in the atomic nucleus is converted into a proton and emits a beta particle (an electron) or a positron (a positively charged electron). This conversion results in an increase or decrease in the atomic number by one, depending on whether a beta particle or a positron is emitted.

C. Electron capture: In electron capture, an electron from the electron cloud surrounding the nucleus is captured by the atomic nucleus. This captured electron combines with a proton, resulting in the formation of a neutron. As a result, the atomic number decreases by one.

D. Positron emission: Positron emission occurs when a proton in the atomic nucleus is converted into a neutron, and a positron is emitted. This emission leads to a decrease in the atomic number by one.

In all of these processes, there is a change in the number of protons in the atomic nucleus, which defines the atomic number. Therefore, each of these processes results in a change in the atomic number.

To know more about atomic number refer here:

https://brainly.com/question/14190064#

#SPJ11

In summary:

(a) No internal irreversibilities: Specific entropy at the exit is equal to the specific entropy at the inlet.

(b) No internal irreversibilities: Specific entropy at the exit is equal to the specific entropy at the inlet.

(c) No internal irreversibilities: Specific entropy at the exit is equal to the specific entropy at the inlet.

(d) Internal irreversibilities: Specific entropy at the exit is greater than the specific entropy at the inlet.

(e) Internal irreversibilities: Specific entropy at the exit is greater than the specific entropy at the inlet.

Let's analyze each case separately:

(a) No internal irreversibilities:

If there are no internal irreversibilities, it means that the process is reversible or internally reversible. In such cases, the specific entropy at the exit will be equal to the specific entropy at the inlet. This is because reversible processes conserve entropy within a control volume.

(b) No internal irreversibilities:

Similarly to case (a), if there are no internal irreversibilities, the specific entropy at the exit will be equal to the specific entropy at the inlet. This holds true regardless of the heat transfer rate or location.

(c) No internal irreversibilities:

Once again, if there are no internal irreversibilities, the specific entropy at the exit will be equal to the specific entropy at the inlet.

(d) Internal irreversibilities:

When internal irreversibilities exist, the specific entropy will generally increase within the control volume. Internal irreversibilities could result from factors such as friction, turbulence, or non-equilibrium processes. In this case, the specific entropy at the exit is expected to be greater than the specific entropy at the inlet.

(e) Internal irreversibilities:

Similar to case (d), the presence of internal irreversibilities indicates that the specific entropy at the exit will likely be greater than the specific entropy at the inlet.

In summary:

(a) No internal irreversibilities: Specific entropy at the exit is equal to the specific entropy at the inlet.

(b) No internal irreversibilities: Specific entropy at the exit is equal to the specific entropy at the inlet.

(c) No internal irreversibilities: Specific entropy at the exit is equal to the specific entropy at the inlet.

(d) Internal irreversibilities: Specific entropy at the exit is greater than the specific entropy at the inlet.

(e) Internal irreversibilities: Specific entropy at the exit is greater than the specific entropy at the inlet.

These conclusions are based on general principles, and the specific behavior of the gas and control volume would depend on the details of the process and the specific properties involved.

To know more about entropy:

https://brainly.com/question/31768840

#SPJ4

Saponification is a chemical reaction that involves the formation of a sodium carboxylate (also known as soap) through the reaction of sodium hydroxide with certain types of organic compounds.

These organic compounds can include steroids, triglycerides, waxes, and even methyl esters. When sodium hydroxide is added to these compounds, it causes a chemical reaction that breaks down the ester bonds and releases the fatty acid components. The fatty acid components then react with the sodium hydroxide to form the sodium carboxylate or soap. This process is commonly used in the production of soap and other cleaning products.

saponification is a process in which a triglyceride (fat or oil) reacts with sodium hydroxide (a strong base) to produce glycerol and sodium carboxylate salts, which are commonly known as soap. The reaction can be summarized in the following steps:

1. Sodium hydroxide (NaOH) is mixed with a triglyceride, which consists of a glycerol molecule bound to three fatty acid chains.
2. The base (NaOH) breaks the ester bonds between the glycerol molecule and the fatty acid chains, releasing glycerol and free fatty acids.
3. The sodium ions (Na+) from the sodium hydroxide react with the carboxylate groups (COO-) of the free fatty acids to form sodium carboxylate salts (soap).

This reaction is used in the production of soap and in the conversion of fats and oils to various other useful products.

learn more about Saponification here

https://brainly.com/question/2263502

#SPJ11

Answer:

1)Alkaline nature 2)Reaction with water 3)Reaction with oxygen and air 4)Corrosion 5)Reducing properties

If either one of them are in the choices, that's the chemical property

Explanation:

Answer:

C. Aluminum is highly reactive.

Explanation:

just did it on Edge.

Answer:

sugar and oxygen

Explanation:

Answer:

the second option

Explanation:

fossils of the same species were found in the same place but it was half way around the world. there are similarities in landforms in the east as western Europe. hot weather plants were found in Antarctica.

Landforms, fossils, climate represents three major types of evidence for continental drift. Therefore, option B is correct.

The term continental drift is defined as the movement of the Earth's continents relative to each other, thereby appearing to drift together across the oceanic bed.

The fossil record is one type of evidence that strongly supported the Theory of Continental Drift. Scientists have discovered fossils of similar plants and animals in rocks of comparable age. These rocks were found on the shores of various continents.

The same species' fossils were discovered in the same location, but it was halfway around the world. Landforms in the east and Western Europe are similar. Antarctica was discovered to have hot weather plants.

Thus, option B is correct.

To learn more about the continental drift, follow the link;

https://brainly.com/question/15122129

#SPJ2

The hydrologic cycle is the movement of water.

Water can recycle itself in the water cycle which is called the hydrologic cycle.

This cycle can be considered to start from the evaporation of water from the ocean's surface, making the air moist. As this moist air is lifted it cools and the water vapor condenses. It then forms clouds; in fact, clouds are made from tiny water droplets and ice crystals that are so small that they can float in the air.

The moisture in the atmosphere can also be transported around the globe until it returns to the surface as precipitation. Precipitation may take the form of rain, snow, sleet, or hail. Once the water reaches the ground, water may evaporate back into the atmosphere, or the water may penetrate the surface and become groundwater.

To learn more about the hydrologic cycle; click here:

https://brainly.com/question/1338837

#SPJ4

The atoms of a specific element is A zinc Zn atom containing 30 protons inside the nucleus and 30 electrons outside the nucleus.

Each element's atoms contain a characteristic number of protons and electrons. The number of protons determines the atomic number of an element and is used to distinguish one element from another. All atoms of a given element are identical in that they have the same number of protons, which are one of the building blocks of an atom.

Atoms of different elements have different numbers of protons, so they are also different from atoms of all other elements. Atoms can only have electrons and protons, but neutrons are the correct description for an element's atom. There are two properties that can be used to identify an element. Atomic number or number of protons in an atom. The number of neutrons and the number of electrons are often the same as the number of protons.

Learn more about A specific element here:-https://brainly.com/question/6258301

#SPJ9

Answer:

Helping Hand Organization

Answer:

if we're talking about beryllium then the answer should be 2 because it wants to move 2 spaces back (losing electrons) to become a Nobel gas so the answer is 2+  

Explanation:

it has 2 valence electrons YW :)    

Answer:

False

Explanation:

A model is a representation of a more complex system.

Answer:

False

Definition:

The scientific model is a condensed depiction of complicated or invisible to the human sight scientific systems, such an atom or a solar system. Although this representation is simplified, it is nevertheless accountable for producing all of the original systems' essence, substance, and behavior. This allows the models to be employed in scientific studies and research and to provide tangible outcomes that accurately reflect the actual systems.

What is a scientific model?

A scientific model is a simplification that roughly represents the real world while making it simple to think about issues, gain clarity and understanding, and perhaps forecast behavior.

Say, "The world is flat!" as an example. Actually, if you were alive 10,000 years ago, this estimate wasn't so awful. In general, everything you see around you suggests that the globe *is* flat, especially if you're living on a large grassy plane. Forget some of the boundary difficulties around the "edge of the globe"; perhaps it just never ends.

Then, though, you could start to see ships if you go to the ocean and stare out across that huge horizon. The sail is shown first, followed by a little portion of the mast, and then the ship's body. Hmm. That must imply that the spacecraft was underneath the earth's "flat surface," or...

The globe that is the earth (Or having a burrito-like form. But for now, let's stick with spherical.) That's fascinating. That would indicate that if I go from one location on Earth to another and keep moving, I would ultimately return to the original location. This proposition is testable!

The Earth is not a perfect spherical, of course. Its core protrudes a little bit. But a sphere is a reasonably good scientific model for the Earth for all everyday practical purposes (with the exception of things like GPS and satellite communications, etc.).

Similar to this, other scientific models should be as straightforward as feasible in order to explain occurrences and offer some level of testable prediction potential.

Thanks,
Eddie

At −92°C, the vapour pressure of the substance X is 5.5 atm

According to Clausius Clapeyron equation,

ln (P₂/P₁) = -ΔHvap /R (1/T₂ - 1/T₁) -------> (i)

Here,

P₁ = 1 atm

T₁ = 90°C = (90 +273)K = 363K

T₂= -92°C = (-92+ 273)K = 181 K

ΔHvap = 17 KJ/mol

R = 8.314 J/K/mol

To find: P₂

Substituting the above given values in equation (i) we get,

ln (P₂/P₁) = -ΔHvap /R (1/T₂ - 1/T₁)

ln(P₂/ 1 atm)= -17 KJmol⁻¹ /  8.314 JK⁻¹mol⁻¹ ( 1/181K -1/363K)

ln P₂ = -17 KJmol⁻¹ /  0.008314 KJK⁻¹mol⁻¹ ( 0.0028K)

2.303 log (P₂) = - 730240.55 atm

log (P₂) = - 730240.55 atm/ 2.303

log (P₂) = -317082.306 atm

P₂ = antilog (-317082.306)

P₂  = 5.5 atm (upto two significant figures)

Thus, the vapour pressure of X at −92°C is 5.5 atm.

To know more about vapour pressure here

https://brainly.com/question/13213515

#SPJ4

The relationship between acceleration due to gravity (g), mass of earth (M) and the radius of earth (R) is \(g = \frac{GM}{R^2} \).

The weight of an object is determined as the product of the object's mass and acceleration due to gravity.

F = mg

The gravitational force between two objects in the universe is directly proportional to the product of mass of the objects and inversely proportional to the square of the distance between the objects.

\(F = \frac{GmM}{R^2} \)

\(mg = \frac{GmM}{R^2} \\\\ g = \frac{GM}{R^2} \)

where;

M is the mass of the earth

R is the radius of the earth

Thus, the relationship between acceleration due to gravity (g), mass of earth (M) and the radius of earth (R) is \(g = \frac{GM}{R^2} \).

Learn more about Newton's gravitational law here: https://brainly.com/question/9373839