0.01040 m as an integer

Answer:

H₂(g) + F₂(g) ⇒ 2 HF(g)   ΔH°rxn = -542 kJ

Explanation:

Let's consider the unbalanced equation that occcurs when H₂(g) reacts with F₂(g) to form HF(g).

H₂(g) + F₂(g) ⇒ HF(g)

In order to get the balanced equation, we will multiply HF(g) by 2.

H₂(g) + F₂(g) ⇒ 2 HF(g)

To convert a balanced equation into a thermochemical equation, we need to add the standard enthaply of the reaction, considering that 542 kJ of energy are evolved for each mole of H₂(g) and there is 1 mole of H₂(g) in the balanced equation. By convention, when energy is released, it takes a negative sign. The thermochemical equation is:

H₂(g) + F₂(g) ⇒ 2 HF(g)   ΔH°rxn = -542 kJ

Answer:

D

Explanation:

best choice, makes the most sense

In the scientific method, conducting an experiment involves designing and performing controlled experiments to test a hypothesis and the correct option is option B.

Scientists manipulate the independent variable while controlling other variables (dependent and controlled variables) to observe and measure the effect on the dependent variable.

By controlling variables, scientists can isolate the factors that influence the outcome, ensuring that any observed changes are a result of the manipulated variable and not other unrelated factors. This step allows for the collection of reliable data, which is essential for drawing meaningful conclusions based on the evidence gathered from the experiment.

Thus, the ideal selection is option B.

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Answer:

24 silver atoms.

Explanation:

11.5 moles of silver atoms will have = 11.5×6.022×1023=6.925×1024 11.5 × 6.022 × 10 23 = 6.925 × 10 24 silver atoms.

Hope this helps!

Brain-List?

According to Avogadro's number, there are 6.926×10²⁴ representative particles in 11.5 moles of silver.

Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.

It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .

According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.

Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number or number of moles×Avogadro's number=11.5×6.023×10²³=6.926×10²⁴ atoms.

Thus, there are 6.926×10²⁴ representative particles in 11.5 moles of silver.

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The best explanation for the increase in the number of plants with long, narrow flowers over time is option D: Individuals with long, narrow flowers produce more seeds than individuals with short, wide flowers.

In this population, short, wide flowers are better suited for bee pollination, while long, narrow flowers are more suitable for hummingbird pollination. Over time, the plants with long, narrow flowers produce more seeds compared to those with short, wide flowers.

This happens because the hummingbirds, which are the main pollinators for long, narrow flowers, are more effective in transferring pollen between these flowers. As a result, the long, narrow flower individuals have a higher reproductive success and pass on their traits to the next generation

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Explanation:

The warmer and less dense air near the ground rises during the day pulling more air through the valley floor. This gentle upslope wind known as a valley breeze. ... The cooler and denser air at higher elevations flows back down the slopes of the mountain and into the valley. This is called a mountain breeze.29-May-2017



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A mountain breeze and a valley breeze are two related, localized winds that occur one after the other on a daily cycle. They are not the same as anabatic and katabatic winds, which are larger and stronger. These winds are opposite from each other. Wikipedia

Amobarbital (like all barbiturates) works by being incontestible to the GABAA receptor at either the alpha or the beta subunit.

Amobarbital (like all barbiturates) works by binding to the GABAA receptor at either the alpha or the beta subunit. These are compulsory sites that are distinct from GABA itself and also distinct from the benzodiazepine binding site.

Amobarbital is a barbiturate classified as having a halfway duration of action, meaning that the effects of the drug can last from 4-6 amobarbital increases the effects of benazepril by apparatus: pharmacodynamic synergism.

So we can conclude that Amobarbital, 5-ethyl-5-isoamyl barbituric acid like all barbiturates.

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Answer:

The element is Iron

Explanation:

Answer:

So what are you asking? the error

Explanation:

the error is the ff its says freckles when it is supposed to be no freckles. The ff stands for none, but Ff stands for freckles so ita a difference and error.

Answer:

the bottom left square it should be ff not Ff

Explanation:

hope this helps

An element is a substance that cannot be broken down by chemical means. Elements are extremely particular compounds that serve as the foundation for all life and matter (well other than the stuff smaller than atoms). It can contain one atom or trillions of them for anything to be an element, however atoms of different types cannot be combined in. That is to say, every atom has a set number of protons, ranging from 1 to 118. You can be positive that the substance you have is hydrogen if there is just one proton present. Mercury is what you get if you have 80 protons. Atoms of pure hydrogen only contain one proton. As most people are aware, if you add oxygen to it, it turns into water, which is no longer an element but a compound. Nevertheless, the building blocks are the elements. Every single object you can see is composed of elements, whether there are many of them, as there are in the human body, or only a few, as there are in salt.

A compound is a substance with a definite composition (with some leeway there, there are 'non-stoichiometric' compounds), that is composed of 2 or more elements.

Further explanation:

A compound in chemistry is a material that is created by mixing two or more distinct chemical elements in such a way that the atoms of the various elements are kept together by strong chemical bonds. These bonds form as a result of the sharing or exchange of electron s among the atoms. A molecule is the smallest, unbreakable unit of a substance.

A mixture is not a compound since there is no bonding between the atoms of the constituent substances in a mixture. In certain cases, mixing dissimilar elements causes chemical reactions that result in the formation of bonds between the atoms and the molecules of a compound. Other possibilities allow mixing distinct components without causing a reaction, preserving the separate identities of the elements. When elements are combined, reactions can happen quickly or slowly (for example, when iron is exposed to oxygen) (as when lithium is exposed to oxygen). There are times when an element is introduced to a chemical, a reaction takes place, creating new compounds (as when pure elemental sodium is immersed in liquid water).

A compound frequently looks and acts quite different from any of the constituent parts. Think about hydrogen (H) and oxygen, for instance (O). At standard atmospheric pressure and room temperature, both of these substances are gases. However, they combine to form the well-known material known as water, which is a liquid at room temperature and at normal atmospheric pressure and whose molecules each contain two hydrogen atoms and one oxygen atom (H2O).

Few elements' atoms readily combine with those of other elements to produce compounds. These gases—helium, neon, argon, krypton, xenon, and radon—are referred to as noble or inert gases. Compounds made of certain elements can be formed easily with other elements. Examples include fluorine, chlorine, and oxygen.

2) The adjective compound refers to something that is made up of several different components. Examples of this usage include compound eyes, which are found in a variety of insects, compound microscopes, which are high-power magnifying devices made up of multiple lenses, compound sentences, which are organized collections of smaller sentences that form a single integrated perceptual environment, and compound documents.

The mass of water used is 50.0-g  and the precise warmness of water (C) is 1.0 cal/g °C. those values will give you the warmth gained in calories. Q = m × C × ∆T = 50.0 g × 1.zero cal/g°C × 5.three °C = 265 cal.

answer °C = 265 cal.

Measurement of heat is finished in energy. One calorie is the quantity of energy required to raise one gram of water one diploma Celsius. To degree heat, you divide the alternate temperature of a sample of water by way of the mass of the water.

Mass is constantly regular for a body. One way to calculate mass is Mass = quantity × density. Weight is the measure of the gravitational force performing on a mass. The SI unit of mass is "kilogram".

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Answer:

19.6 J

Explanation:

The following data were obtained from the question:

Mass (m) of object = 2 Kg

Height (h) = 1 m

Workdone =?

NOTE: Acceleration due to gravity (g) = 9.8 m/s²

Thus, we can obtain the workdone in lifting the object by using the following formula:

Workdone = mgh

Workdone = 2 × 9.8 × 1

Workdone = 19.6 J

Therefore, the workdone in lifting the object to height of 1 m is 19.6 J

The variables that are not state functions are m (mass), q (heat), and w (work).

Work is an activity that requires physical or mental effort and is done in exchange for money or other rewards. It can also be seen as an exchange of energy, where an individual puts in effort in order to achieve a desired outcome. Work can be done in a variety of fields and can range from manual labor to professional jobs. It is an important part of many people's lives and can be a source of fulfillment and satisfaction, as well as providing a means of economic security. Work can also be a source of stress, but when done properly can be a great way to make a living, develop skills, and better oneself.

Therefore, The variables that are not state functions are m (mass), q (heat), and w (work).

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We can see here that one use of ethanol based on its volatile nature is as a fuel additive.

Ethanol, also known as ethyl alcohol or grain alcohol, is a volatile, colorless liquid that belongs to the alcohol chemical group. It is produced through the fermentation of sugars by yeast or other microorganisms. Ethanol has a wide range of applications, including industrial, fuel, and recreational uses.

Ethanol is a renewable resource that can be used to replace gasoline in some applications. It is also less polluting than gasoline, and it can help to reduce greenhouse gas emissions.

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Approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M.

To determine the mass of glucose (C6H12O6) required to prepare a 0.215 M solution in 5000 mL, we need to use the formula:

Molarity (M) = moles of solute / volume of solution (in liters)

First, let's convert the volume of the solution from milliliters (mL) to liters (L):

5000 mL = 5000/1000 = 5 L

Now, we can rearrange the formula to solve for moles of solute:

moles of solute = Molarity (M) x volume of solution (L)

moles of solute = 0.215 M x 5 Lmoles of solute = 1.075 mol

Since glucose (C6H12O6) has a molar mass of approximately 180.16 g/mol, we can calculate the mass of glucose using the equation:

mass of solute = moles of solute x molar mass of solute

mass of glucose = 1.075 mol x 180.16 g/mol

mass of glucose = 194.0 g (rounded to three significant figures)

Therefore, approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M. It's important to note that the molar mass of glucose used in this calculation may vary slightly depending on the level of precision required.

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Answer:

i just had gthe sme question looked it up and got it WRONG

Explanation:

sorry i ont have a clue

In the slow carbon cycle, carbon moves through rocks, soil, oceans, and the atmosphere over a period of 100–200 million years through a series of chemical reactions and tectonic activity.

Carbon cycle is defined as the exchange of carbon compounds between the earth's biosphere, geosphere, pedosphere, hydrosphere, and atmosphere. Life on Earth is reliant on the carbon cycle. Because nature tends to keep carbon levels in balance, the amount of carbon that is naturally released from reservoirs equals the amount that is naturally absorbed by reservoirs.

The slow carbon cycle is the term used to describe the flow of carbon compounds between the atmosphere and the Earth. The carbon cycle processes of combustion and breakdown are primarily involved in this process. The annual average for the slow carbon cycle is 1013 to 1014 grams of carbon.

Thus, in the slow carbon cycle, carbon moves through rocks, soil, oceans, and the atmosphere over a period of 100–200 million years through a series of chemical reactions and tectonic activity.

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Answer:  1,950 N

Explanation:

2812.5N of force is needed to accelerate a 1,875 kg object at a rate of 1.5 m/s².

HOW TO CALCULATE FORCE:

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Answer:

Mohammed has less kinetic energy

Explanation:

m=Kg

V= m/s

KE= kinetic energy = J

the way you work out the answer is:

KE = 1/2 × m × v squared

Answer:

A) 0.1005 m

sorry if it's wrong

The measurement has four significant figures, is 0.1005 m. The correct option is A.

Significant figures are the digits that provide accuracy to the numbers or any calculations. Zero does not count as significant figures. So if zero is present in the significant figures or numbers, it will not be counted as the significant figures.

All other numbers are counted as significant figures under a group of numbers. The digits that are present on the right or left side of decimals are counted as significant figures, but zero will not count on either side of the decimals.

For example, here, the first option, 0.1005 m =  four significant figures, because 0 between significant figures is considered significant.

2. 5100.m = two significant figures.

3. 0.0510 m = two significant figures.

4. 0.0510 m = two significant figures.

Thus, the correct option is A) 0.1005 m.

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Explanation:

I only know

Cs3As = Cesium arsenide

The stronger acids includes: H₂Se in option -(i) , HBrO₃ in option - (ii), and HBrO₃ in option - (iii) are correct answers.

Strong acids are defined as those that completely ionise in solutions. This means that it emits the greatest amount of hydrogen ions or protons when added to a solution containing it.

Strong acids are made up of seven primary acids: sulfuric acid, nitric acid, hydrochloric acid, hydrobromic acid, and hydrochloric acid. These possess the strong acid property and can completely dissociate in water.

In an aqueous solution, a strong acid completely ionises. Every time it dissolves in water, a proton (H⁺) is lost. A weak acid is one that only partially ionises in a solution. When dissolved in water, it only releases a small number of its (H⁺) atoms.

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The required tubular length for 99.9% conversion is 116.84 meters.

On Earth, the rate at which cyclohexane reacts with benzene and methylcyclopentane is constrained by high mass transfer.

A tubular reactor with an internal diameter of 5 cm and a length of 20 m will be used to conduct the reaction, and cylindrical pellets with dimensions of 0.5 cm in diameter and 0.5 cm in length will be placed within the reactor's pipes.

Only the exterior surface of the pellets are coated.

The packed bed has a 40% porosity and a 60 dm3/min intake flow rate.

When the intake gas stream includes 5% cyclohexane and 95% hydrogen at 2 atm and 500°C, the tubular length vs. conversion graph should be drawn.

The graph may be used to identify the minimum length of tube necessary for 99.9% conversion.

For cyclohexane diffusion in hydrogen, the Fuller, Schettler, and Giddings Correlation is as follows:

a = 0.8854,

b = 1.764102,

C = 6.0231023.

The tube length vs. conversion graph may be displayed at 2 atm and 500°C when the incoming gas stream includes 5% cyclohexane and 95% hydrogen.

The following equation may be used to determine the rate of reaction:

ra=2.31011 exp[-88580/RT]C_A(1X)/3

The mole balancing equation for an isothermal tubular reactor is given as

dX/dL = -ra/C A,

where X is the conversion and L is the length.

To determine the length of the tubular reactor needed for a specific conversion X, we can integrate the aforementioned equation from X = 0 to X = X.

We must numerically calculate the following equation to obtain the necessary tube length for 99.9% conversion:

∫0.999L0−ra/CA 

dL=0.999XEq L 

for X=0.999

After rearranging the equation above, we get:

0.999L0ra/CA

dL=XX Eq

The aforementioned equation is integrated to give us

L = 116.84 m.

Therefore, the required tubular length for 99.9% conversion is 116.84 meters.

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We can see here that the organic function of cannabinol is its interaction with the endocannabinoid system (ECS) in the human body.

The organic function of procainamide lies in its ability to block sodium channels in cardiac cells, leading to a decrease in the excitability of the heart muscle and a suppression of abnormal electrical signals.

Procainamide is a medication used primarily in the treatment of cardiac arrhythmias, specifically ventricular arrhythmias. It belongs to a class of drugs known as antiarrhythmics, which work by regulating the electrical activity of the heart.

In addition to its antiarrhythmic properties, procainamide also possesses mild anticholinergic effects, which contribute to its overall pharmacological profile.

Cannabinol (CBN) is a cannabinoid compound found in the cannabis plant. While it is not as well-known as other cannabinoids like THC and CBD, it has some notable organic functions and potential effects on the body.

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Answer:

Describe electrons.

Location: electron cloud

Charge: negative

Mass: one-two thousands amu

Explanation:

Answer:

235.45 cm³

Explanation:

From the question given above, the following data were obtained:

Initial volume (V₁) = 220 cm³

Initial temperature (T₁) = 26 °C

Final temperature (T₂) = 47 °C

Pressure = constant

Final volume (V₂) =?

Next, we shall convert celsius temperature to Kelvin temperature. This can be obtained as follow:

T(K) = T(°C) + 273

Initial temperature (T₁) = 26 °C

Initial temperature (T₁) = 26 °C + 273

Initial temperature (T₁) = 299 K

Final temperature (T₂) = 47 °C

Final temperature (T₂) = 47 °C + 273

Final temperature (T₂) = 320 K

Finally, we shall determine the volume (i.e V₂) at 47 °C as follow:

Initial volume (V₁) = 220 cm³

Initial temperature (T₁) = 299 K

Final temperature (T₂) = 320 K

Final volume (V₂) =?

V₁ / T₁ = V₂ / T₂

220 / 299 = V₂ / 320

Cross multiply

299 × V₂ = 220 × 320

299 × V₂ = 70400

Divide both side by 299

V₂ = 70400 / 299

V₂ = 235.45 cm³

Thus, the volume at 47 °C is 235.45 cm³

Answer:

They stay the same

Explanation:

Answer:

GFM Magnesium = 24.5g

Moles = 5.15 moles

Grams of Magnesium in 5.15 Moles = moles x GFM

= 5.15 moles X 24.5 g

= 126.175

-----> 126.2g

The statement that describes the phenomenon whereby Metal paper clips do not attract or repel each other is option A. Magnetic domains within the paper clips align with the magnetic field.

A magnetic field is a force field that is created by the presence of a magnet or a moving electric charge. It exerts a force on other magnetic objects or on charged particles that move within it.

Magnetic fields can be represented by field lines that show the direction and strength of the magnetic force at each point in space. The strength of a magnetic field is usually measured in units of tesla (T) or gauss (G), with 1 T = 10,000 G.

Magnetic fields are used in a wide range of applications, including electric motors, generators, MRI machines, and particle accelerators. They also play a crucial role in the Earth's magnetic field, which protects us from the solar wind and cosmic radiation.

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Answer:

I have no idea but I think its 15 ;-;

Explanation:

Answer: i also need help on the same question :(

Explanation: