how many liters of a 0.20 % (m/v) kcl iv solution can be prepared from 3.0 l of a 5.0 % (m/v) stock solution?

Now we can plug in the values for n, R, V, and T and solve for P: P = (0.54375 mol)(0.0821 L•atm/mol•K)(5.80 L) / 295.15 K = 2.28 atm. Therefore, the answer is (b) 2.28 atm

To solve this problem, we need to use the Ideal Gas Law formula: PV=nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin. We can rearrange this formula to solve for P: P=nRT/V.
First, we need to calculate the number of moles of oxygen gas in the container. We can use the formula n=m/M, where m is the mass of the gas (17.4 g) and M is the molar mass of oxygen gas (32.00 g/mol). n = 17.4 g / 32.00 g/mol = 0.54375 mol.
Next, we need to convert the temperature from Celsius to Kelvin.

T = 22.0°C + 273.15

= 295.15 K.

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.

Answer:

B. Convection oven

Explanation:

The following are all in a kitchen tool category;

I. Measuring: this includes tools such as tapes, scale (balance), graded-cup, teaspoon, which are used for taking measurements of food items in the kitchen.

II. Food preparation: it comprises of various tools used in the kitchen for the preparation of food. This includes pots, cooker, spoon, turner etc.

III. Cutting: these are tools used for cutting food items and it include knives, chopping board, grinder etc.

A convection oven is typically designed and developed with multiple fans for circulation of air and as such it is used for baking. It is mainly used in big industries and restaurants.

The final pressure of the gas if the external pressure is 0.10 atm is (1 mol × 8.314 J/mol·K × 295 K) / Vf

To calculate the final pressure of the gas, we can use the equation for work done in an isothermal expansion:

W = -nRT × ln(Vf/Vi)
Where:
W is the work done (given as 210 J),
n is the number of moles of gas (given as 1 mole),
R is the ideal gas constant (8.314 J/mol·K),
T is the temperature in Kelvin (given as 295 K),
Vi is the initial volume (since the volume is not given, it is not needed for this calculation),
Vf is the final volume (also not given, but we can find it from the given information).

We can rearrange the equation to solve for Vf:
Vf = Vi × exp(-W / (nRT))

Substituting the given values:
Vf = exp(-210 J / (1 mol × 8.314 J/mol·K × 295 K))

Calculating this expression gives us the final volume.
Finally, to find the final pressure (pf), we can use the ideal gas law:
pf × Vf = nRT

Rearranging the equation and solving for pf:
pf = nRT / Vf

Substituting the given values:
pf = (1 mol × 8.314 J/mol·K × 295 K) / Vf

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The energy that it takes to melt 2 kg of ice is; 2 kg * 1000 g/kg * 1 mol/18.02 g * 6.03 kJ/mol = 669 kJ. The correct option is C.

Energy is a quantitative value. It is the entity that is used in every reaction because without it no reaction can occur. In animals and plants and other organisms, energy is needed to carry out biological functions.

Mass of ice, m = 2 kg

Molar heat of fusion for ice; \(\rm \Delta_fus.H = 6.03 kJ/mol at 0°C.\).

The molar mass of Ice which is water is; 18.02 g/mol

By the formula for calculating energy is:

E = (m/M) * Δ_fus.H

Putting the values in the equation:

E = (2 kg * 1000 g/kg) * 1 mol/18.02 g * 6.03 kJ/mol = 669 kJ

Thus, the correct option is C, 2 kg * 1000 g/kg * 1 mol/18.02 g * 6.03 kJ/mol = 669 kJ.

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Fog is a low-lying cloud of microscopic water droplets that is thick enough to impair horizontal visibility to under 1,000 meters.

Fog is a low-lying cloud of microscopic water droplets that is thick enough to impair horizontal visibility to under 1,000 meters. The terms "ice fog" and "smoke fog" can also be used interchangeably to describe clouds containing both elements.

Depending on whether the obscurity is brought on by water droplets or solid particles, the phenomena is referred to as a mist or haze under comparable circumstances but with visibility more than 1,000 meters. Water vapor condenses on water vapor condenses that are constantly present in outdoor air to create fog.

Therefore, fog is a low-lying cloud of microscopic water droplets that is thick enough to impair horizontal visibility to under 1,000 meters.

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Answer:

the equation is balanced

Answer:

The virus's genome is uncoated from the protein and injected into the host cell.

Explanation:

is it amino acids???????

Answer:

A: three

Explanation:

Answer:Plasma is highest energy state of matter.It consists of electrons,protons and neutral particles.

Explanation:(1) Plasma has a very high electrical conductivity .

(2) The motion of electrons and ions in plasma produces it's own electric and magnetic field

(3)It is readily influenced by electric and magnetic fields .

(4)It produces it's on electromagnetic radiations.



The graduated cylinder is used to measure the volume of KOH and H2SO4 when accurate volume measurement is not required.

In the laboratory certain graduated apparatus are used to measure liquids. These graduated apparatus used to measure liquids include;

Sometimes, we are not really looking for a strictly accurate volume of liquid and we can use a graduated cylinder to measure the volume of liquid in such cases.

However, when we need to have strictly accurate volume measurement, we need a pipet or a buret.

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The CONCATENATE function will enable you to move the 2-character state abbreviation in cell l2 into its own column.

A column is a vertical arrangement of data in a table, typically used to organize and display information in a database or spreadsheet. Columns are used to organize data, making it easier to read and interpret. They can also be used to compare different values within the same data set. For example, a company may organize its customer information into columns such as Name, Address, Phone Number, etc. By organizing data into columns, companies can quickly search for and access the information they need.

The CONCATENATE function can be used to move the 2-character state abbreviation in cell l2 into its own column. This function allows you to combine two or more text strings into one string. To use the CONCATENATE function, you will need to enter the function name and the cell references of the text strings you want to combine. For example, if you wanted to move the 2-character state abbreviation in cell l2 to its own column, you could enter the following formula in the cell where you want the state abbreviation to appear: =CONCATENATE(L2). This formula will combine the text string in cell l2 into one string and display it in the specified cell.

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Chemical bonding explains the properties of chemical and biological polymers by forming strong covalent bonds or flexible hydrogen bonds, which give the polymer its unique characteristics.

Chemical bonding is a fundamental concept that explains the properties of chemical and biological polymers. Chemical bonds are formed when atoms interact with each other to form molecules or particles. In a polymer, the atoms are linked together in a repeating pattern, forming a long chain. These bonds give the polymer its unique properties, such as strength, flexibility, and the ability to interact with other molecules. The type of chemical bond formed between the atoms will determine the properties of the polymer.

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Moles of chromium (lll) oxide produced : 4 moles

The reaction equation is the chemical formula of reagents and product substances

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

Reaction

4Cr+3O₂⇒2Cr₂O₃

moles of Cr=8 moles

From the equation, mol ratio Cr : Cr₂O₃ = 4 : 2, so mol Cr₂O₃ :

\(\tt \dfrac{2}{4}\times 8=4~moles\)

Electrolyte:

The substance that conducts electricity is known as an electrolyte.

Explanation :

For example, strong and weak acids and bases, as well as salts, are examples of electrolytes. In contrast, nonelectrolytes are substances that do not conduct electricity.

Strong electrolyte: Strong electrolytes fully dissociate in solution to produce ions.

For example, all ionic compounds are strong electrolytes, and acids such as hydrochloric acid and nitric acid are strong electrolytes.

Weak electrolyte: Weak electrolytes only partially ionize in solution, resulting in a few ions and a few molecules in solution.

For example, weak acids like acetic acid are weak electrolytes.

Nonelectrolyte: Nonelectrolytes don't conduct electricity in solution because they don't produce ions. For example, sugar and ethanol are both nonelectrolytes.

The following are the identifications of each substance as a strong electrolyte, weak electrolyte, or nonelectrolyte:

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definition physical  property  can be observed or measured without changing the composition of matter

examples

color

density

volume

mass

definition

chemical A chemical property is a characteristic of a particular substance that can be observed in a chemical reaction. Some major chemical properties include flammability, toxicity, heat of combustion

examples flammability, toxicity, acidity, reactivity

pretty much the difference is is that chemical changes its chemical reaction involving the rearrangement of the atoms of one or more substances and a change in their chemical properties or composition, resulting in the formation of at least one new substance Physical change does not do that

In order to classify each compound as a primary, secondary, or tertiary amine, or as a quaternary ammonium salt, we first need to draw the structures of the compounds.

A primary amine is an amine compound that has one alkyl or aryl group attached to the nitrogen atom. A secondary amine is an amine compound that has two alkyl or aryl groups attached to the nitrogen atom. A tertiary amine is an amine compound that has three alkyl or aryl groups attached to the nitrogen atom. A quaternary ammonium salt is an amine compound that has four alkyl or aryl groups attached to the nitrogen atom, with a positive charge on the nitrogen atom.

Now, let's draw the structures of the compounds and classify each one: Compound 1: CH3CH2NH2, This compound has one alkyl group (ethyl) attached to the nitrogen atom. Therefore, it is a primary amine. Compound 2: (CH3)2NH, This compound has two alkyl groups (methyl) attached to the nitrogen atom. Therefore, it is a secondary amine.with a positive charge on the nitrogen atom. Therefore, it is a quaternary ammonium salt. In summary, Compound 1 is a primary amine, Compound 2 is a secondary amine.

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Answer:

milk, lemon juice, toothpaste and baking soda

Answer:

flatworm

Explanation:

Answer:

Explanation:

The answer should be .00500M

The molarity of the solution is = 5.12M

The molarity of a solution is the measures the number of moles of a solute per liter of a solution.

Molarity = moles solute/Liter solution

Molar mass of sodium (Na) = 23g

Molar mass of chlorine (Cl) = 35.5g

Molar mass of NaCl = 23 + 35.5 = 58.5g/mol

To calculate the quantity of moles in 150g of NaCl,

1mol = 58.5g

xmol = 150g

Cross multiply,

xmol= 150×1/58.5

= 2.56mol

To convert 500mL to Liters,

500/1000 = 0.5 Liters

Substituting into the equation, Molarity = moles solute/Liter solution

Molarity= 2.56/ 0.5 = 5.12M

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The energy of light emitted as an electron relaxes from the n = 5 to the n = 3 energy level of a hydrogen atom is  1.55 × 10⁻¹⁹ J.

The energy of light emitted as an electron relaxes from the n = 5 to the n = 3 energy level of a hydrogen atom can be calculated using the formula:

ΔE = E₅ - E₃ = (-13.6 eV / 5²) - (-13.6 eV / 3²) = 0.97 eV

where;

To convert the energy in eV to Joules, we use the conversion factor: 1 eV = 1.6 × 10⁻¹⁹ J.

Therefore, the energy of light emitted can be calculated as:

ΔE (J) = (0.97 eV) × (1.6 × 10⁻¹⁹ J/eV) = 1.55 × 10⁻¹⁹ J

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Here is an illustration of the subshells that would need to have an electron taken from them in order to form a + cation and the subshells that would need to have an electron added to them in order to form a -1 anion.

The charge of an electron, which is commonly thought to be negative, is equal to and the opposite of the charge of a proton, which is typically thought to be positive. Because there are more electrons than protons in an ion's total charge, the net charge is not zero. An anion is a negatively charged ion that has more electrons than protons compared to a positively charged ion called a cation. Because they have opposing electric charges, cations and anions are drawn to one another by electrostatic force, which makes it easy to create ionic compounds. Atomic ions are distinct from molecular ions, which are composed of two or more atoms and are also known as multi-atom ions.

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Answer:

???????

Explanation:

Answer:

The calculated mass of one atom of oxygen-18  is approximately  2.99×10⁻²³ grams

Explanation:

The given mass of an oxygen-18 atom = 18.0042 amu

The definition of the atomic mass unit is the mass equivalent to the mass of one twelfth the atomic mass of one atom of carbon-12. The atomic mass unit is used to express the mass of an isotope of an element

1 amu = 1.66 × 10⁻²⁴ grams

Therefore;

18.0042 amu = 18.0042 ×  1.66 × 10⁻²⁴ grams ≈ 2.99×10⁻²³ grams

The calculated mass of one atom of oxygen-18 ≈ 2.99×10⁻²³ grams

The atomic mass unit can be taken as the mass in grams of one mole of the substance

Therefore, the mass of one mole of the oxygen 18 atom = 18.0042 g

A liquid with stronger intermolecular forces will have a lower vapor pressure at a given temperature and thus a higher boiling point.

Answer: The Process is Deposition

Explanation:

Answer:

Deposition

Explanation:The accumulation or laying down of matter by a natural process, as in the laying down of sediments in streams or rivers.

Answer:

Volume is the quantity of three-dimensional  

Explanation: