need a quick answer please

We need 5.62 moles of H2 and 5.62 moles of CO to produce 3.60 × 10^2 g of CH3OH.

How to calculate the mole ?

To calculate the number of moles of a substance, we use the formula:

moles = mass / molar mass

where "mass" is the mass of the substance in grams and "molar mass" is the molar mass of the substance in grams per mole.

To determine the number of moles of reactants needed to produce a given amount of product, we need to use the balanced chemical equation for the reaction and the molar mass of the product.

Assuming that the reaction is:

2H2 + CO → CH3OH

We can see that the stoichiometry of the reaction is 2:1, which means that for every 2 moles of H2, we need 1 mole of CO to produce 1 mole of CH3OH.

The molar mass of CH3OH is:

12.01 + 4(1.01) + 16.00 = 32.04 g/mol

Therefore, to produce 3.60 × 10^2 g of CH3OH, we need:

n(CH3OH) = (3.60 × 10^2 g) / (32.04 g/mol) = 11.23 mol

Since the stoichiometry of the reaction is 2:1, we need half as many moles of H2 as we do of CH3OH:

n(H2) = 1/2 × n(CH3OH) = 1/2 × 11.23 mol = 5.62 mol

And we need half as many moles of CO as we do of CH3OH:

n(CO) = 1/2 × n(CH3OH) = 1/2 × 11.23 mol = 5.62 mol

Therefore, we need 5.62 moles of H2 and 5.62 moles of CO to produce 3.60 × 10^2 g of CH3OH.

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For ideal gases, the molecules themselves have negligible volume, which is one assumption of the ideal gas law.

Ideal gases, the molecules themselves are assumed to have negligible volume. This means that the gas particles are considered to be point masses with no physical size or volume.

This assumption is made because the volume occupied by the gas molecules is assumed to be insignificant compared to the total volume of the gas sample.

It simplifies calculations and allows for the application of the ideal gas law, which relates pressure, volume, temperature, and the number of moles of gas.

Although real gases do have finite molecular volumes, the assumption of negligible volume is valid under conditions of low pressure and high temperature, where intermolecular interactions are minimal.

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Answer:

Scoop a soil sample into a fresh container, add 1/2 cup of water, and mix. Then, add 1/2 cup of baking soda. If the soil bubbles or fizzes, the soil is acidic. The reaction you're seeing is the result of acidic soil coming into contact with an alkaline substance (baking soda).

Explanation:

Hope this helped!

Answer:

I can't understand your language? can you write in English

I'm sorry

a. Decreasing alpha from 0.05 to 0.01 makes the significance level more stringent. You will be less likely to reject the null hypothesis, even when it's false. This increases the probability of a Type II error, thus potentially reducing the power of the test. The power curve will shift to the left.

b. If the sample size is reduced from 90 to 50, the effect on the power curve is that it will also shift towards the left.

The power curve is a graph that shows the probability of rejecting the null hypothesis as a function of the true value of the mean.

In the given scenarios of this study, Reducing the significance level and reducing the sample size will shift the power curve to the left, indicating a decrease in the statistical power of the test.

The power of a statistical test is the probability that it correctly rejects the null hypothesis when the alternative hypothesis is true.

a) Reducing alpha from 0.05 to 0.01 means that we are more stringent in our assessment of whether the new treatment is effective.

This will result in a decrease in the power of the test, meaning that it is less likely that we will be able to detect a difference between the new treatment and the previous treatment.

b) If the sample size is reduced from 90 to 50, the effect on the power curve is that it will also shift towards the left.

This is because a smaller sample size decreases the power of the test. A larger sample size provides more information and thus makes it more likely to correctly reject the null hypothesis when the alternative hypothesis is true.

Therefore, by reducing the sample size, you are decreasing the likelihood of detecting a true effect if one exists, thus reducing the power of the test.

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Answer:

0.00580 →

3000 →

0.000908 →

200. →

Explanation:

yay

Answer:

\(\large \boxed{\mathrm{view \ explanation}}\)

Explanation:

4.060 × 10⁵ (scientific notation)

The decimal point moves 5 places to the right.

⇒ 406000 (standard form)

7 × 10³ (scientific notation)

The decimal point moves 3 units to the right.

⇒ 700 (standard form)

5.0 × 10⁻⁴ (scientific notation)

The decimal point moves 4 units to the left.

⇒ 0.0005 (standard form)

8 × 10⁻² (scientific notation)

The decimal point moves 2 units to the left.

0.08 (standard form)

Answer:

See explanation

Explanation:

Average  velocity = distance traveled/time

distance traveled = 7.25 miles

Time taken = 20 minutes or 0.33 hours

Average velocity = 7.25 miles/0.33 hours = 21.97 miles per hour

This average velocity does not reflect how fast Juan's mother drove at every point in the journey.

At every point in the journey, Juan's mother had an instantaneous velocity given by the velocity at that given instant divided by time taken up to that point.

The instantaneous velocity gives the velocity at particular instants throughout the journey while the average velocity reflects the average velocity of the entire journey.

The values of the Graduations for A , B and C will be  0.2 ml,  2ml and 1ml respectively.

Graduated Cylinder - A popular piece of scientific equipment used to measure the volume of a liquid is a graduated cylinder, sometimes referred to as a measuring cylinder or mixing cylinder. Its form is slender and cylindrical. Each marked line on the graduated cylinder indicates the volume of liquid that has been measured.

The clear graduated cylinder is widely used for volume measurements and is regarded to be more accurate than a beaker since it contains permanently marked incremental graduations.

To calculate the value of graduations-

1. Subtract the two values to get the value between the labeled graduations.

2. Determine how many spaces there are between the two graduations. Keep in mind that volume equals space.

3. Divide the number of gaps by the value between the graduations.

For cylinder  A.

2 ml- 1ml  = 1ml

Number of spaces = 5

∴1/ 5 = 0.2

Graduation = 0.2ml

For cylinder B -

20-10 = 10

number of spaces = 5

∴10/ 5 =2

Graduation = 2ml

For cylinder C-

10-5 = 5

Number of spaces= 5

∴5/5 = 1

Graduation = 1ml

Hence , Graduations for A , B and C will be  0.2 ml,  2ml and 1ml respectively.

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Your question is incomplete. Please find the missing image below.

Answer:

The answer is

2 moles of hydrogen react with 1 mole of oxygen to form 2 moles of water

The statement "Sodium hydroxide can cause severe damage to skin and eyes" is true. Sodium hydroxide is a highly corrosive substance and can cause burns, irritation, and damage when it comes into contact with the skin or eyes.

Sodium hydroxide is a highly caustic compound that can cause significant damage to the skin and eyes upon contact. The severity of the damage depends on the concentration of the sodium hydroxide solution, the duration of exposure, and the amount of skin or eye tissue affected. Sodium hydroxide reacts with the fats and oils in the skin and eyes, leading to the formation of soap-like substances called "salts of fatty acids." These salts can cause significant tissue damage, leading to pain, redness, swelling, and blistering.

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Answer:

The aluminium cation Al3+ which is small and highly charged; and is polarizing and bonds aluminium forms tend towards covalency.

Explanation:

Marie Anne Lavoisier realized how crucial it was to create drawings of the tools she and her husband employed in their research. In order to impart knowledge, this is crucial.

It is widely acknowledged that Lavoisier's major contributions to chemistry came mostly from his transformation of the field from a qualitative to a quantitative one. The discovery of the function of oxygen in combustion is what made Lavoisier famous. He challenged the phlogiston idea and identified and called the elements oxygen and hydrogen (1778). Lavoisier contributed to the development of the metric system, created the first comprehensive list of elements, and reformed chemical nomenclature. In addition to discovering that matter's mass never changes despite its form or shape, he also anticipated the creation of silicon in 1787. Lavoisier served as the general manager of the Ferme and was a key member of several aristocratic councils

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Answer:

B

Explanation:

because when you put sugar in water you actually have to stir it in the water or it will just seat at the bottom of the water it also the same for sand except whener you mix the sand or not it will not dissolve unlike the sugar.

Answer:

i think it is right..

The primary distinction between both the Bohr model as well as the quantum atomic theory would be that the former describes the behavior of a particle as just a particle, while the latter describes its dual nature as a wave and even a particle.

To explain what electrons could maintain stable orbits all around the nucleus, Bohr suggested its quantized shell model of the atom.

According to quantum theory, energy exists in discontinuous packages known as quanta.

The electron was viewed as a particle with definite circular orbits in the Bohr Model. The electron gets mathematically handled as just a vibration in the quantum theory model. The electron possesses both particle- and wave-like characteristics.

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Answer:

b. mexico

Explanation:

The Hueco Bolson aquifer is a binational aquifer shared by the United States of America (USA) and Mexico that is strongly interconnected with the transboundary river, Rio Grande/Rio Bravo. Limited recharge, increasing urbanization, and intensified agriculture have resulted in the over-drafting of groundwater

The mass, in grams, of the sample of methanol (CH₃OH) is 64 grams.

Mass of any substance can be calculated by using moles as:

n = W/M, where

W = required mass

M = molar mass

In the question that:

Moles of methanol = 2mole

Molar mass of methanol = 32g/mole

On putting these values in the above equation, we get

W = n × M

W = 2mole × 32g/mole = 64g

Hence, 64 grams is the mass of the sample.

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Answer:

It comes from the sun.

The pH and the pOH of an aqueous solution that is 0.045 M in HCl(aq) and 0.095 M in HBr(aq) at 25 °C is 1.35, and 12.98 respectively.

To calculate the pH and pOH of the solution, we need to use the concentration of the acidic solutions and the dissociation constants of HCl and HBr.

First, calculate the pH:

For HCl (aq):

[HCl] = 0.045 M

HCl is a strong acid and dissociates completely in water, so the concentration of H⁺ ions is equal to the concentration of HCl:

[H⁺] = 0.045 M

Taking the negative logarithm (base 10) of the H⁺ concentration gives us the pH:

pH = -log10(0.045)

pH = 1.35

Now, let's calculate the pOH:

For HBr(aq):

[HBr] = 0.095 M

HBr is also a strong acid, and its dissociation is similar to HCl. The concentration of H⁺ ions is equal to the concentration of HBr:

[H⁺] = 0.095 M

Again, taking the negative logarithm (base 10) of the H⁺ concentration gives us the pH:

pH = -log10(0.095)

pH = 1.02

Since pH + pOH = 14 (at 25 °C), we can calculate the pOH:

pOH = 14 - pH

pOH = 14 - 1.02

pOH = 12.98

Therefore, the pH of the solution is approximately 1.35, and the pOH is approximately 12.98.

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The hydrogen ion concentration, [H⁺], given that the pH is 2.0 is 1×10⁻² M

We know that the pH of a solution is given by the following formula:

pH = -Log [H⁺]

Where

With that above formula, the hydrogen ion concentration, [H⁺] of the solution can be obtained as follow:

pH = -Log [H⁺]

2 = -Log [H⁺]

Multiply through by -1

-2 = Log [H⁺]

Take the anti-log of -2

[H⁺] = Anti-log -2

[H⁺] = 1×10⁻² M

Thus, from the above calculation, we can conclude that the hydrogen ion concentration, [H⁺] is 1×10⁻² M

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An electrolytic cell is a cell in which an electric current drives a no spontaneous reaction.

What is electrolytic cell?

Any apparatus in which excess electricity is changed into chemical energy or conversely is an electrolytic cell. Such a cell normally includes two electrodes, which can be metal or electrical conductors, kept apart from one another and in interface with an electrolyte (q.v. ), which is commonly an ionic compound that has been dissolved or fused.

For instance, water can be electrolyzed to create gaseous oxygen and gaseous hydrogen with the use of an electrolytic cell.

Electrical energy is transformed into chemical energy in an electrolytic cell. Electricity is generated in this situation as a result of a spontaneous redox reaction. Electricity must be provided to start the redox reaction because it is not spontaneous.

Therefore, Option C is correct.

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Fe(ii) ions are there in 20.0 g of FeSO4 (molar mass=151.9 g/mol) ? Avogadro number=6.022× 10²³ is 0.794× 10²³

Mole concept is used for finding out the no of molecules present in a given sample.

Given,

Given mass =20g

Molar mass = 151.9/mol

Avogadro number=6.022× 10²³

We know,

Number of moles= Given mass / Molar mass

Number of moles= 20 / 151.9

Number of moles= 0.132 moles

According to the equation,

FeSO₄ -----> Fe⁺² + SO₄⁻²

Now,

Number of molecules of FeSO₄ = 0.132 × 6.022 × 10²³

Number of molecules of FeSO₄ = 0.794× 10²³

It can be seen from equation,

No. of molecules of  FeSO₄ = no. of ions of Fe⁺² = no of ions of SO₄⁻²

No. of ions of Fe⁺² = 0.794× 10²³

Hence, No. of ions of Fe⁺² is 0.794× 10²³.

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Answer: The correct answer (not rounded) would be 7.93 × 1022 iron(II) ions

Hope that helps:)

The structure of ammonium lauryl sulfate consists of 12 carbon atoms, 29 hydrogen atoms, 1 nitrogen atom, 4 oxygen atom and 1 sulfur atom.

The molecular formula of ammonium lauryl sulfate is written as;

C12H29NO4S

The structure of ammonium lauryl sulfate consists of 12 carbon atoms, 29 hydrogen atoms, 1 nitrogen atom, 4 oxygen atom and 1 sulfur atom.

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Hence, it takes two half-lives for a reactant's concentration to drop to 25% of its initial value.

The amount of solute contained in a specific amount of solution is how concentrated a material is. The number of moles of solute in 1 L of solution, or molarity, is the standard unit of measurement for concentrations.

You can determine how much solute has dissolved in the solvent by looking at the concentration of the solution. One teaspoon of salt per two cups of water, for instance, would be the concentration.

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Answer:

Similar properties

Explanation:

Potassium (K) has atomic number 19 which means its electron configuration (pattern of electrons in it's energy levels (electron shells)) is 2·8·8·1 while Copper (Cu) has atomic number 29 which means its electron configuration is 2·8·8·8·3 hence Potassium has 4 electron shells while Copper has 5

Potassium has 19 protons (from its atomic number) while Copper has 29 protons

The number of protons and electrons is usually the same (in an atom) (that's why atoms don't naturally have charges i.e they're usually neutral) so Potassium has about 19 electrons while Copper has about 29 electrons.

So similar properties automatically becomes your answer cuz the rest are wrong.

Answer:

Potential and Kinetic energy

Explanation:

The reaction between lithium metal and magnesium sulfate is a single displacement reaction, also known as a displacement or replacement reaction.

In this reaction, lithium metal (Li) reacts with magnesium sulfate (MgSO4) to form lithium sulfate (Li2SO4) and magnesium metal (Mg). The general equation for this reaction can be represented as:

2Li(s) + MgSO4(aq) -> Li2SO4(aq) + Mg(s)

In a single displacement reaction, one element displaces another element in a compound. In this case, lithium, being more reactive than magnesium, displaces magnesium from magnesium sulfate. The lithium atoms bond with the sulfate ions, forming lithium sulfate, while magnesium atoms are released as elemental magnesium.

Therefore, the reaction between lithium metal and magnesium sulfate is a single displacement reaction.

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If a solid sample of copper is an excellent conductor of electric current, it is likely due to the presence of metallic bonds in the sample.

Good conductors are the materials which offer very low resistance to the flow of electric current.

Solid copper is a metal, and metals have metallic bonds. Metallic bonds are a type of chemical bond that occur between atoms of metallic elements. In a metallic bond, valence electrons of the metal atoms are delocalized and shared among all the atoms in metallic solid, creating "sea" of electrons that are free to move throughout the structure.

This gives metals their unique properties such as high electrical conductivity and ductility. So, if solid sample of copper is an excellent conductor of electric current, it is likely due to the presence of metallic bonds in sample.

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Note: The question given on the portal is incomplete. Here is the complete question.

Question: A solid sample of copper is an excellent conductor of electric current . Which type of chemical bonds are in the sample?

Explanation:

Because boiling point of water is not 100 degrees Celsius but it depends on atmospheric pressure. Liquid boils at temperature when partial pressure of liquid becomes equal to atmospheric pressure.

relationship between work pressure and volume can be stated by this formula;

W=PΔV

as we know gas is expanding so it means the work is done by the system

which is shown by a negative sign

W= 138.1 j x 1 L atm / 101.3 j

   = -  1.36 L atm

let's convert torr into atm

P = 783 torr X ( 1 atm/ 760 torr)

    = 1.03 atm

W = -PΔV

- 1.36 L atm = - 1.03 atm x ΔV

ΔV = 1.36 L atm / 1.03 atm

     = 1.32 L  

ΔV = \(V_{2}\) - \(V_{1}\)

      = \(V_{2}\) - 0.0607 L

\(V_{2}\) = 1.32 L  +  0.0607 L

       = 1.38 L

the final volume of gas is 1.38 L

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Answer:

22.6g/mL

Explanation:

density = mass / volume

given mass of object : 142.5040

volume of object : not given however we are told that when placed inside of a cylinder with 25 mL of water the water level rises to 31.3 mL

31.3 - 25 = 6.3

So the water level rose by 6.3 mL meaning that the object has a volume of 6.3 mL

Now to find the density.

Recall that density = mass / volume

mass = 142.5040 g and volume = 6.3 mL

so density = 142.5040g / 6.3 mL = 22.6 g / ml