If one mol of gas = 22.4 at STP how many liters is occupied by 3.65 moles of oxygen gas at STP

Answer: water (d)

Explanation:

the nutral value is 7. 7.1 is closest

Answer:

Voltage is the measure of electric potential energy per unit charge, current is the flow of electric charge through a circuit, and resistance is the property of a material that opposes the flow of electric current.

Ohm's Law relates these three concepts by stating that current is directly proportional to voltage and inversely proportional to resistance.

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Net Reaction is,

\(2Al + 8H^+ + 2K^+ + 2OH^- + 4SO_{4}^2- + 22H_{2}O ---> 2KAl(SO_{4})_{2}.12H_{2}O +3H_{2}\)

For total yield,

as the moles are 2 for both aluminium and potash alum if we divide 1 gm by the mass of Al the outcome mole will be 0.3. since the moles are same so potash alum will also have 0.3 mole. Now multiply 0.3 moles by the mass of potash alum that is 474 so the ANSWER FOR THE YIELD WILL BE 142.2 gms

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Answer: The smallest whole-number ratio of the atoms in a compound represents the molar ratio of the elements in which they are combined. For example, Water is a compound. The chemical formula of water is H2O H 2 O . In water, H and O elements are combined in the molar ratio of 2:1.Explanation:

Answer:

\(emperical \: formula\)

Answer:

conductivity

Explanation:

Answer:

0 degrees Celsius

Explanation:

Answer:

Water changes from a liquid to a solid at 0° Celsius

The concept stoichiometry is used here to determine the moles of NaNO₃ produced. Chemical stoichiometry refers to the quantitative study of the reactants and products involved in a chemical reaction. Here the moles of NaNO₃ is

Stoichiometry is an important concept in chemistry which helps us to use the balanced chemical equation to find out the amounts of reactants and products. Here we make use of ratios in the balanced equation.

The balanced equation is:

Co(NO₃)₂ + Na₂SO₄ → 2 NaNO₃ + CoSO₄

1 mole of Na₂SO₄ gives 2 moles of NaNO₃.

So 5 moles of Na₂SO₄ gives: 2 NaNO₃ × 5 mole Na₂SO₄ / 1 mole Na₂SO₄ = 10 mole NaNO₃

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Answer:

The philosophical view of man implies that we are moral as well as intelligence beings. It provides the framework to discover the nature of human excellence embodied by the perennial virtues towards which all men of good will tend.

A) Calculate the lower and upper bounds of the 95% confidence interval:

Lower bound = X - ME

Upper bound = X + ME

B) you would compare the obtained mean concentration (0.101675 N) with the prepared concentration (0.1012 N) and calculate the t-value. The t-value is then compared to the critical t-value at a certain significance level (e.g., a = 0.05) and the degrees of freedom (n-1) to determine if there is a statistically significant difference.

(a) To determine the range within which you can be 95% confident that the true value falls, you can calculate the confidence interval using the obtained results.

First, calculate the mean (X) of the measured concentrations:

X = (0.1017 + 0.1019 + 0.1016 + 0.1015) / 4 = 0.101675 N

Next, calculate the standard deviation (s) of the measured concentrations:

s = sqrt(((0.1017 - X)² + (0.1019 - X)² + (0.1016 - X)² + (0.1015 - X)²) / (4 - 1))

Then, calculate the standard error of the mean (SE) using the formula:

SE = s / sqrt(n)

where n is the number of measurements (in this case, n = 4).

With the standard error, you can calculate the margin of error (ME) for a 95% confidence interval using the t-distribution. The t-value for a 95% confidence interval with 3 degrees of freedom is approximately 3.182.

ME = t * SE

Finally, calculate the lower and upper bounds of the 95% confidence interval:

Lower bound = X - ME

Upper bound = X + ME

(b) To determine if there is a statistical difference between the obtained mean concentration (0.101675 N) and the prepared concentration (0.1012 N), you can perform a t-test. The t-test compares the means of two sets of data to determine if they are significantly different from each other.

Using the formula for a two-sample t-test, you would compare the obtained mean concentration (0.101675 N) with the prepared concentration (0.1012 N) and calculate the t-value. The t-value is then compared to the critical t-value at a certain significance level (e.g., α = 0.05) and the degrees of freedom (n-1) to determine if there is a statistically significant difference.

If the calculated t-value is greater than the critical t-value, it suggests a statistically significant difference between the obtained mean concentration and the prepared concentration.

Please note that the actual calculations and interpretation may vary depending on the statistical software or method used, and it's always recommended to consult a statistician or refer to appropriate statistical references for accurate analysis.

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Answer:

0.0238 moles NaOH

Explanation:

To find the amount of moles, you need to

(1) convert the volume from mL to L (1,000 mL = 1 L)

(2) calculate the amount of moles (using the molarity equation)

It is important to arrange the conversions in a way that allows for the cancellation of units. The final answer should have 3 sig figs.

 125.0 mL NaOH                  1 L
---------------------------  x  ---------------------  =  0.1250 L NaOH
                                         1,000 mL

Molarity = moles / volume (L)                    <----- Molarity equation

0.190 M = moles / 0.1250 L                       <----- Insert values

0.0238 = moles                                         <----- Multiply both sides by 0.1250

Answer: 177.23 g.

Explanation:

the volume of the aluminum bar is

1.7 cm x 3.0 cm x 12.9 cm

= 65.61 cm^3

2.7 g/cm^3 x 65.61 cm^3

177.23g

Answer:

b

Explanation:

Answer:

hot dog

Explanation:

Option B, where [OH-] is 1.0 x 10-13 mol dm-³3, is the only one that can be considered basic. Therefore, Option B is the correct answer.

To determine whether a solution is basic or acidic at 25 °C, we can compare the concentration of hydroxide ions ([OH-]) with the concentration of hydronium ions ([\(H_3O\)+]). In a neutral solution, the concentrations of [\(H_3O\)+] and [OH-] are equal, resulting in a pH of 7.

Option A states that the concentration of [\(H_3O\)+] is 1.0 x 10-3 mol dm-3. Since [\(H_3O\)+] represents the concentration of hydronium ions, this solution would be acidic because the concentration of [\(H_3O\)+] is higher than [OH-], indicating an excess of hydronium ions.

Option B states that the concentration of [OH-] is 1.0 x 10-13 mol dm-³3. In this case, [OH-] is higher than [\(H_3O\)+], indicating an excess of hydroxide ions. Therefore, this solution would be considered basic.

Option C states that the solution has a pH of 4.00. A pH of 4.00 is below the neutral pH of 7, indicating an excess of hydronium ions and an acidic solution. Therefore, this option does not represent a basic solution.

Option D states that the concentration of [\(H_3O\)+] is 1.0 x 10-13 mol dm-3. Similar to Option A, this concentration of [\(H_3O\)+] indicates an acidic solution, not a basic one.

Option B

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Answer:

D is the correct answer

Explanation:

In order for a solution to be basic at 25 C, the H+ concentration has to be less than the OH- concentration, and given that H+ times OH- is 10^-14, we deduce that H+ must be less than 10^-7 for the solution to be acidic. Thus, A can be eliminated, and so can C. With B, we calculate an H+ concentration of 0.1M, which also fails to be less than 10^-7
Thus, D is the correct answer and we can verify that as H+ is less than 10^-7.



Note: I do not know why my previous answer was deleted for "being incorrect", and i'm not sure how the incorrect answer was "expert verified", but I am as certain that D is the correct answer as i am sure of 3*(4+5-1) being equal to 24.

Answer:

34.06amu

Explanation:

The reaction expression is given  as:

          N₂   +   3H₂   →    2NH₃  

We are to find the mass of reactants in the equation given;

  Here:

      Mass of reactants  = 2(atomic mass of N) + 3[ 2 x atomic mass of H]

 Atomic mass of N  = 14.0067amu

 Atomic mass of H = 1.008amu

      Mass of reactants  = 2(14.0067) + 3(2 x 1.008)  = 34.06amu

Explanation:

Three things are required in proper combination before ignition and combustion can take place---Heat, Oxygen and Fuel. There must be Fuel to burn. There must be Air to supply oxygen. There must be Heat (ignition temperature) to start and continue the combustion process.

Answer:

Although Thomas Jefferson came to power determined to limit the reach of the federal government, foreign affairs dominated his presidency and pushed him toward Federalist policies that greatly contrasted with his political philosophy. The first foreign episode involved Jefferson's war with the Barbary pirates. For the previous century or so, Western nations had paid bribes to the Barbary states, which would later become Morocco, Algeria, Tunis, and Tripolitania, to keep them from harassing American and merchant ships

Explanation:

Volume of the sample of neon gas is 8.48L

Volume can be calculated by multiplying mole of gas with molar gas volume and the neon gas is the inert gas which is present in group 18 of the periodic table used in electric sign and florecent lamp

Here given data is 0.379 mol of neon gas at STP

Formula to calculate volume

Volume = n×Vm

Where n = number of moles

Vm = molar gas of volume at STP

Put the given value in the formula then

V =  0.379 mol × 22.4L/mol

V = 8.48L

Volume of the sample of neon gas is 8.48L

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Answer:

1. Rinse with distilled water.

2. Avoid dropping it

3. Use a stopper and fill with water and shake

4. Dry

The formula for Co3+ is Co3+ because it represents the ion of cobalt that has lost three electrons, leaving it with a 3+ charge.

What is chemical formula and how they are formed ?

A chemical formula is a symbolic representation of a chemical compound that shows the types of elements present in the compound and the relative number of atoms of each element. For example, the chemical formula for water is H2O, which indicates that it is made up of two hydrogen atoms and one oxygen atom.

Chemical formulas are formed by identifying the elements that make up a compound and determining the relative number of each element in the compound. The number of each element is represented by a subscript following the chemical symbol of the element. For example, the chemical formula for methane is CH4, which indicates that there is one carbon atom and four hydrogen atoms in each molecule of methane.

The formula for Se2- is Se2- because it represents the ion of selenium that has gained two electrons, giving it a 2- charge.

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The voltage of an electrolytic cell with copper and magnesium electrodes is 2.71 v. Therefore, option B is correct.

The electrolytic cell is a type of cell that performs a redox reaction while using electrical energy. When electrical energy is applied, a redox reaction occurs in molten NaCl. It is therefore an electrolytic cell.

An electrolyte, two electrodes, and an electrolytic cell make up an electrolytic cell (a cathode and an anode). The electrolyte is typically a mixture of ions that have been dissolved in water or another solvent. Electrolytes can also be molten salts, like sodium chloride.

The standard reduction potential, E° of the metals are as below:

Mg²⁺ + 2e⁻ ⇌  Mg; E° = -2.372

Cu²⁺ + 2e⁻ ⇌  Cu; E° = +0.337

Therefore, magnesium has the the lower E°, it will serve as the anode in the electrolytic cell while copper will serve as the cathode.

At the anode; Mg ⇌  Mg²⁺ + 2e⁻, E° = -2.372

At the cathode; Cu²⁺ + 2e⁻ ⇌  Cu, E° = +0.337

EMF of the cell = E° cathode - E° anode

= 0.337 - (-2.372) = 2.71 V

Therefore, EMF of the cell is 2.71 V

Thus, option B is correct.

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The electron changes from a higher energy level to a lower energy level, and a photon is emitted.

What is electrons?

Electrons are the smallest and most fundamental particles that make up matter. They are negatively charged particles that exist in the orbits of atoms and molecules and that participate in chemical reactions. Electrons are found in all atoms, and determine the chemical properties of the atom. They are also responsible for electricity and magnetism, and can be used to create electrical current in circuits. Electrons have a very small mass and move around the nucleus of an atom very quickly. In addition, electrons can be excited by certain energies, causing them to move to higher energy levels, where they can then be used to create electrical current.

Therefore, The electron changes from a higher energy level to a lower energy level, and a photon is emitted.

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Answer:

compound

Explanation:

it is calcium oxide, also known as quicklime

Answer:

right now we are using energy by online learning on our laptops , air conditioning, and transportation

Explanation:

The concentration of a substance can be expressed using molarity, molality or percent.

The term concentration has to do with the amount of substance present in solution. Now let us solve the problems individually;

a) Number of moles =  0.850 grams/80 g/mol = 0.011 moles

molarity = 0.011 moles/345 * 10^-3 L = 0.032 M

b) Number of moles =  13.5g /58 g/mol = 0.23 moles

molality = 0.23 moles/250 * 10^-3 Kg = 0.92 m

c) Number of  moles = 16.5 g/128 g/mol = 0.13 moles

molality = 0.13 moles/54.3  * 10^-3 Kg =2.39 m

d) Total mass present =  12 g +  18 g + 25 g + 500 g = 555 g

mass percent of calcium sulfate =  12 g/555 g * 100/1 = 2.2 %

mass percent of sodium nitrate =  18 g/ 555 g  * 100/1 = 3.2 %

mass percent of potassium chloride = 25 g / 555 g  * 100/1 = 4.5%

mass percent of water =  500 g / 555 g  * 100/1 =90.1%

e) Total mass present = 125 g + 1500g = 1625 g

Mass percent of NaCl =  125 g/1625 g * 100/1 = 7.7%

f) Total volume of solution = 15 L +  28 L  = 43 L

percent by volume of acetone = 15 L/43 L * 100/1 =  34.9%

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A methane molecule (CH4) is considered symmetrical because it possesses a symmetric structure and exhibits symmetry operations.

Symmetry refers to a balanced arrangement of elements that can be divided into equal parts by a plane, axis, or center. In the case of methane, it exhibits several symmetrical characteristics.

Firstly, methane has a tetrahedral molecular geometry, with the carbon atom at the center and four hydrogen atoms positioned around it. This geometry ensures that the molecule is symmetrical in terms of its spatial arrangement.

Each hydrogen atom is located at one of the vertices of the tetrahedron, forming equal angles and distances with respect to the central carbon atom. This symmetry is maintained regardless of the orientation of the molecule.

Additionally, methane possesses rotational symmetry. It can be rotated around any of the carbon-hydrogen bonds, and the molecule will retain its overall appearance.

The symmetry of methane arises from its molecular structure and the equal distribution of electron density around the central carbon atom. The four hydrogen atoms are bonded to the carbon through sigma bonds, which have a cylindrical symmetry. This balanced arrangement of the atoms contributes to the overall symmetry of the molecule.

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Answer:

A metal M readily forms water-soluble sulphate MSO4, water-insoluble hydroxide M(OH)2 and oxide MO. The oxide and hydroxide are soluble in NaOH. The M is:

Answer:

1577 °C

Explanation:

Step 1: Calculate the volume of the cylinder

The diameter of the base (d) is 13.0 cm and the height (h) is 15.6 cm. We will use the following expression.

V = h × π × (d/2)²

V = 15.6 cm × π × (13.0 cm/2)² = 8.28 × 10³ cm³ = 8.28 × 10³ mL = 8.28 L

Step 2: Calculate the moles of BF₃

We have 0.0985 kg (98.5 g) of BF₃, whose molar mass is 67.81 g/mol.

98.5 g × 1 mol/67.81 g = 1.45 mol

Step 3: Convert 2.70 MPa to atm

We will use the conversion factor 1 MPa = 9.86923 atm.

2.70 MPa × 9.86923 atm/1 MPa = 26.6 atm

Step 4: Calculate the maximum safe operating temperature

We will use the ideal gas equation.

P × V = n × R × T

T = P × V / n × R

T = 26.6 atm × 8.28 L / 1.45 mol × (0.0821 atm.L/mol.K) = 1850 K

We can convert 1850 K to Celsius using the following expression.

°C = K - 273.15 = 1850 K - 273.15 = 1577 °C

The sample of nitrogen gas will occupy 236.54 mL of volume at 1.05 atm pressure.

Boyle's law is the ideal law that defines the relationship between pressure and volume of gases. A law is given if the temperature is kept constant. Pressure and volume exhibit an inverse relationship.

The Boyle's Law is given as:

P₁V₁ = P₂V₂

Given,

Initial pressure (P₁) = 0.974 atm

Initial volume (V₁) = 255 mL

Final pressure (P₂) = 1.05 atm

Final volume = V₂

The final volume at 1.05 atm is calculated by substituting values in Boyle's Law as:

P₁V₁ = P₂V₂

0.974 × 255 = 1.05 V₂

V₂ =  248.37 ÷ 1.05

= 236.54 mL

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Answer:Nothing

Explanation:

The answer is nothing the tempatature isnt matched with the degrees this is false