in a laboratory experiment, a student found that a 195-ml aqueous solution containing 2.494 g of a compound had an osmotic pressure of 12.2 mmhg at 298 k. the compound was also found to be nonvolatile and a nonelectrolyte. what is the molar mass of this compound?

I think the answer is A. I know it's Planet X.

MgCl₂ in the reaction forms a precipitate.

The chemical reaction in which two ionic bond combine to form an insoluble salt in a aqueous solution is called precipitation reaction. The formation of a precipitate, an insoluble ionic solid, which is the result of precipitation processes, occurs when cations and anions in an aqueous solution interact. The solubility principles for typical ionic solids can be used to assess if such a reaction happens. MgCl₂ produced as a product in the reaction forms precipitate because it is solid in nature and it is an insoluble salt and not dissolve in solution and forms precipitate on the bottom surface of the solution. Thus, MgCl₂ product in the reaction forms a precipitate.

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Answer:

PbSO4    

Explanation:

just took it

It would be 2.515 yards. This is because to convert cm into yards, you would need to divide the length value by 91.44 so in your case, it would be 230÷ 91.44 which equals 2.51531.

Hope that helps!

When calculating the number of neutrons you subtract the mass number from the atomic number?

Since the vast majority of an atom's mass is found its protons and neutrons, subtracting the number of protons (i.e. the atomic number) from the atomic mass will give you the calculated number of neutrons in the atom. In our example, this is: 14 (atomic mass) – 6 (number of protons) = 8 (number of neutrons).

Performing hydrolysis with cold aqueous sulfuric acid allows for better control over the reaction, minimizes unwanted side reactions, and ensures the stability of the desired product.

Hydrolysis of the reaction mixture is performed with cold aqueous sulfuric acid instead of at room temperature for several reasons, including controlling the reaction rate, minimizing side reactions, and ensuring product stability.
1. Reaction rate control: Lowering the temperature slows down the reaction rate, providing better control over the hydrolysis process. This allows for a more gradual and manageable conversion of reactants to products, reducing the chance of over-hydrolysis and improving the yield of the desired product.
2. Minimizing side reactions: Performing the hydrolysis with cold aqueous sulfuric acid reduces the likelihood of unwanted side reactions occurring. Side reactions can result in impurities and decreased product quality. By keeping the reaction mixture cold, the energy available for such side reactions is limited, promoting the selectivity for the desired hydrolysis reaction.
3. Product stability: Some products of hydrolysis reactions can be sensitive to high temperatures and may degrade or decompose if exposed to elevated temperatures for extended periods. Using cold aqueous sulfuric acid helps maintain the stability of the product, preserving its integrity and ensuring a better overall yield.

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a- Aluminium bromide has the following formula: AlBr₃, so the unbalanced equation is:

As we can see, for now the aluminium atoms are balanced, but the bromine is not. To balance the bromine, we can put 3 in front of Br₂ and 2 in front of AlBr₃. That way, we will have a total of 6 bromine atoms in each side:

But now the Al is unbalaced, so to fix it we can add a 2 in front of Al to get the balanced equation:

b- The aluminium are the lone atoms, so, counting them, we see that there are 8 atoms initially.

c- Each pair of empty circles represent a molecule of Br₂, counting them we have 6 molecules initially.

d- The proportion of Al to AlBr₃ is 2:2, that is, 1:1, so if all Al reacts, we would produce the same amount of AlBr₃ as Al, which would be 8 molecules.

The proportion of Br₂ to AlBr₃ is 3:2, so is all Br₂ reacts we will get 2/3 of that as AlBr₃, which would be 6*2/3 = 4 molecules.

This shows that there is not enough Br₂ to react with all 8 atoms of Al, meaning only 4 molecules of AlBr₃ will be produced.

e- Since there is not enough Br₂ to react with all Al present, the limiting reactant is the bromine.

f- The excess reactant is the other one, so if bromine is the limiting, the aluminium is the excess reactant.

g- Since only 4 molecules of AlBr₃ will be formed with all the bromine present, since the proportion of Al to AlBr₃ is 1:1, we wil need only 4 atoms of Al to produce them, which meand that, from the total 8 atoms, we will get

4 atoms of Al as excess reactant after the reaction is complete.

Answer:

c

Explanation:

kw=h+bls

This is a combustion reaction of an alkane with oxygen. It is exothermic (

Δ

H

<

0

), and can be balanced in normal methods for balancing chemical equations ie ensuring that the total number of atoms of each element is the same on both sides of the equation.

Gravity, as a fundamental force of nature, is influenced by several factors. The following are some of the key factors affecting gravity:

Answer: Predominant tropical easterly winds sweep across the central and southern portions of the state, keeping the temperatures mild

Explanation:

bc

Answer:

The brain stem

Explanation:

Answer:

hfufhdufdhfdufhdufhdudf

Explanation:

ring a bell?

Answer:

Explanation:

i think its b

In the given reaction, Cl₂ is an oxidizing agent, and Rb is a reducing agent.

2Rb + Cl₂(g) → 2RbCl

Here, Cl₂ is an oxidizing agent.

Rb is a reducing agent.

The oxidizing agent is a substance that causes oxidation by accepting electrons; therefore, its oxidation state decreases.

The reducing agent is a substance that causes reduction by losing electrons; therefore its oxidation state increases.

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Among the given options, methanol (CH3OH) would be the most soluble in water. This is because methanol has a smaller and more polar structure than the other two options, which makes it easier for the molecule to dissolve in the polar water molecule.

Methanol can form hydrogen bonds with water due to the presence of an oxygen atom and a hydrogen atom attached to it. The hydrogen bonds that form between methanol and water break the intermolecular forces between the methanol molecules and allow them to dissolve in water.

On the other hand, 1-hexanol (CH3CH2CH2CH2CH2CH2OH) is the least soluble in water due to its larger and nonpolar structure. While it has a hydroxyl (-OH) functional group, which is polar and can form hydrogen bonds with water, the hydrocarbon chain of the molecule is nonpolar and repels water molecules.

The intermediate compound, 1-butanol (CH3CH2CH2OH), is more soluble in water than 1-hexanol due to its smaller size and polar functional group.

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Answer:

In the chemical industry.

Isotopes are the atoms of the same element with same atomic no: and different mass numbers. ... ⇒As isotope of uranium is used as a fuel in nuclear reactor. ⇒An isotope of iodine is used in the treatment of goitre. ⇒An isotope of cobalt is used in the treatment of cancer.

NH4+ and C2H5NH3+ are the strongest acids based on the value of Kb (options A and option B).

To determine which cation is the strongest acid among the given options, we need to compare their Kb (base dissociation constant) values. The cation with the smallest Kb value will correspond to the strongest acid.

The Kb values are not provided, so we cannot make a direct comparison. However, we can make some general observations based on common trends and properties of the cations.

a. NH4+ (Ammonium ion): NH4+ is the conjugate acid of the weak base ammonia (NH3). It can act as a weak acid in water by donating a proton (H+). Ammonium ion is moderately acidic.

b. C2H5NH3+ (Ethylammonium ion): Similar to NH4+, C2H5NH3+ is the conjugate acid of a weak base, ethylamine (C2H5NH2). It can also act as a weak acid in water. Ethylammonium ion is moderately acidic.

c. C5H6N (Pyridine): Pyridine is a weak base and does not readily donate protons in water. Therefore, it is not an acid.

d. [C8H11N4O2]+ (Protonated histidine): Protonated histidine is a conjugate acid derived from the amino acid histidine. It can donate a proton and act as an acid. However, without the Kb value, we cannot compare its acidity to the other options accurately.

e. [NH2NH3CO]+ (Protonated urea): Protonated urea is the conjugate acid of urea, which is a weak base. Protonated urea can donate a proton and act as an acid. However, without the Kb value, we cannot compare its acidity to the other options accurately.

Based on the provided information, we can determine that NH4+ and C2H5NH3+ are moderately acidic, while pyridine does not act as an acid. The acidity ranking between [C8H11N4O2]+ and [NH2NH3CO]+ cannot be determined without the Kb values.

Therefore, among the given options, NH4+ and C2H5NH3+ are the strongest acids.

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To calculate the pressure required to pop a kernel of popcorn, we can use the ideal gas law, which states:

PV = nRT

Where:

P = pressure (in atm)

V = volume (in liters)

n = number of moles

R = ideal gas constant (0.0821 L·atm/(mol·K))

T = temperature (in Kelvin)

First, let's convert the given temperature from Celsius to Kelvin:

T = 100 + 273.15 = 373.15 K

Next, we need to calculate the number of moles of water vapor produced during the popping process. We know that the total mass of water in the popcorn is 16.7 g, so we can convert it to moles using the molar mass of water:

moles of H2O = mass of H2O / molar mass of H2O

moles of H2O = 16.7 g / 18.015 g/mol

Since the water vapor is the gas inside the kernel, we can assume that all the water inside the kernel turns into steam during the popping process.

Now, we can calculate the pressure using the ideal gas law:

P = (n * R * T) / V

By substituting the values into the equation, we can calculate the pressure required to pop a kernel of popcorn.

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According to the given picture:

A represents the atomic number.

B represents the chemical symbol.

C represents the atomic mass.

D represents the name of the element.

1. Fluid compressibility (C): Fluid compressibility refers to the measure of how much a fluid's volume changes in response to a change in pressure.

2. Solution-gas/liquid ratio (SGLR): The solution-gas/liquid ratio represents the volume of gas dissolved in a given volume of liquid at a specific pressure and temperature.

3. Fluid formation volume factor (FVF): The fluid formation volume factor represents the ratio of the volume of a fluid at reservoir conditions (pressure and temperature) to its volume at surface conditions.

4. Fluid densities (ρ): Fluid densities refer to the mass per unit volume of a fluid.

5. Fluid viscosities (μ): Fluid viscosities represent the measure of a fluid's resistance to flow.

1.  Equation: C = -1/V * dV/dP

  Symbol: C

  Unit: 1/Pascal (Pa^-1)

  Correlation: The compressibility of fluids can vary depending on the fluid type. For ideal gases, the compressibility is inversely proportional to pressure.

2.Equation: SGLR = V_gas / V_liquid

  Symbol: SGLR

  Unit: Volumetric ratio (e.g., scf/bbl)

  Correlation: The solution-gas/liquid ratio is influenced by the pressure and temperature conditions, as well as the composition of the fluid.

3. Equation: FVF = V_reservoir / V_surface

  Symbol: FVF

  Unit: Volumetric ratio (e.g., bbl/STB)

  Correlation: The fluid formation volume factor depends on the composition and properties of the fluid, as well as the reservoir conditions.

4. Equation: ρ = m / V

  Symbol: ρ

  Unit: Mass per unit volume (e.g., kg/m^3)

  Correlation: Fluid densities can vary depending on the type and composition of the fluid. For example, water has a density of approximately 1000 kg/m^3.

5. Equation: No single equation; viscosity is measured experimentally using viscometers.

  Symbol: μ

  Unit: Pascal-second (Pa·s) or centipoise (cP)

  Correlation: The viscosity of a fluid is influenced by temperature and pressure. Different fluids exhibit different viscosities, ranging from low-viscosity fluids like water to high-viscosity fluids like heavy oil.

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Based on the information in the table, the differences between the two mountain ranges are most likely due to the process of uplift and erosion.

The Appalachian Range has an average peak elevation of 900 meters and is composed of mostly sedimentary rock, which suggests that it is a very old mountain range that has undergone significant erosion over time. In contrast, the Himalayan Range has an average peak elevation of 6,000 meters and is composed of mostly sedimentary rock, which suggests that it is a relatively young mountain range that has undergone significant uplift.

The sharp, jagged peaks of the Himalayan Range are likely due to the process of uplift, which has caused the rock to be pushed upward, creating a more dramatic and rugged landscape.

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Answer:

1: CO2 cycle

2: soil respiration

3: in soil repiration grass regenerates and is ready for gazing, the carbon will be sequestered again when the animals return. then CO2 is released into the atmosphere.

Answer:

1. covalent

2. polyatomic ion

Explanation:

:)

Answer:

1) b

2)c

Explanation:

Answer:

Monomers contain bonds between metals

Answer:

B: Monomers contain double bonds

Explanation:

I got it right on Edge

Organic compound which has -OH as functional group is classified as alcohols while those with -COOH as functional group are classified as carboxylic acids.

Functional group is defined as a substituent or group of atoms or an atom which causes chemical reactions.Each functional group will react similarly regardless to the parent carbon chain to which it is attached.This helps in prediction of chemical reactions.

The reactivity of functional group can be enhanced by making modifications in the functional group .Atoms present in functional groups are linked to each other by means of covalent bonds.They are named along with organic compounds according to IUPAC nomenclature.

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Answer: 4.00

Explanation:

Here, we're given a very simple unit conversion problem.

1 mL= 1 x 10⁻³ L

1 μL = 1 x 10⁻⁶ L

So, we can convert 250 mL and 13.5 μL into L as follows,

        250 mL = 250 x 10⁻³ L

        13.5 μL = 13.5 x 10⁻⁶ L

1 experiment requires 13.5 μL  of HCl.

Hence,

  the number of experiments = total volume / volume per experiment

                                                  = 250 x 10⁻³ L / 13.5 x 10⁻⁶ L

                                                  = 18518.518

                                                  = 18518

(number of experiments should be a whole number. Hence we have to choose 18518)

Hence, the number of experiments which can be performed is about 18500.

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As per the chemical reaction ,sodium hydroxide can be used for neutralization of sulfuric acid as,2 NaOH+H₂SO₄\(\rightarrow\)Na₂SO₄ +2 H₂O.

Chemical reactions are defined as reactions which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical reaction.

There are several characteristics of chemical reactions like change in color, change in state , change in odor and change in composition . During chemical reaction there is also formation of precipitate an insoluble mass of substance or even evolution of gases.

There are three types of chemical reactions:

1) inorganic reactions

2)organic reactions

3) biochemical reactions

During chemical reactions atoms are rearranged and changes are accompanied by an energy change as new substances are formed.

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Answer:

This option is correct

Explanation:

Molecules are expressed in the form of Lewis in order to simplify their expression or chemical study, but this does not mean that they manifest or respect this form in all three dimensions since some are generally unstable, or even in the third dimension, these locations between atoms are respected for the characteristics of their unions.