Which group of measurements is the most precise? (Each group of measurements is for a different object. )


a) 2. 0 g, 3. 0 g, 4. 0 g

b) 2 g, 2. 5 g, 3 g

c) 2 g, 3 g, 4 g

d) 1 g, 3 g, 5 g

Answers

Answer 1

The group of measurements that is the most precise is option b) 2 g, 2.5 g, 3 g.

This is because precision refers to how closely a group of measurements are to each other.

In this case, the measurements in option b are the closest together, with only a difference of 0.5 g between each measurement.

Therefore, this group of measurements is the most precise.

It is important to note that precision does not necessarily mean accuracy, as the measurements could all be close together but still be far from the true value.

However, in this case, we are only looking at precision, so option B is the correct answer.

Learn more about distance here:

https://brainly.com/question/22728744

#SPJ11


Related Questions

16) SEP Ask Questions The process of evaporation has a different outcome in an open
system versus a closed system. What happens to the water level in a closed water
bottle compared to an open water bottle if you set them both out in the sun?
Notebook
I U
B

Answers

The water level remains unchanged because the molecules of water vapor cannot diffuse into the surroundings.

Describe the evaporation.

In order for a liquid to become a gas, evaporation must occur. When raindrops "disappear" on a hot day or when wet clothing dries in the sun, it is simple to picture this phenomenon. In these instances, the liquid water is actually evaporating into a gas known as water vapor rather than truly dissipating.

Evaporation explained to children

When a liquid turns into a gas, it has evaporated. To form a gas known as water vapor, liquid water evaporation occurs. Water evaporation and atmospheric re-entry are made possible by the sun's heat. It then creates a cloud and returns to being liquid water.

To know more about Evaporation visit:

https://brainly.com/question/5019199

#SPJ1

11.8 Aromatic compounds
1. Name each compound using both the common name and the IUPAC name.
1.
2.
3.
CI
Oo
CI
Br
NO,
2. Name each compound using both the co
CH₂
NO₂

Answers

The compound CO has name carbon monoxide while CH₂ and NO₂ respectively ethylene and nitrogen dioxide respectively.

What is a compound?

Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.

Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:

1)Molecular compounds where in atoms are joined by covalent bonds.

2) ionic compounds where atoms are joined by ionic bond.

3)Inter-metallic compounds where atoms are held by metallic bonds

4) co-ordination complexes where atoms are held by co-ordinate bonds.

Learn more about compounds,here:

https://brainly.com/question/13516179

#SPJ1

Why is SF6 a nonpolar molecule?

Answers

[tex]SF_{6}[/tex] is non polar due to symmetrical placement of all the fluorine around the central sulfur atom.

SF6 is a covalent molecule with a central sulfur atom. Sulfur on its own contains 6 valence electrons as a main group 6A element. This will share all 6 valence electrons through 6 single covalent bonds to the 6 peripheral fluorine atoms. So the central sulfur atom has zero non-bonding pairs. These bonds are sometime polar due to the central and peripheral atoms having different electronegativity values. The polar molecule contains a certain geometry that does not cancel out these polar bond vectors. Due to its geometry sulfur hexafluoride is non polar. The arrangement of this is at perpendicular (90˚) angles ensures that the pull for electrons by fluorines on one side is balanced by fluorines pulling on the other side.

To learn more about Non polar molecule please visit:

https://brainly.com/question/1426521

#SPJ4

Atomic mass of bromine is 80 g. The mass of four moles of molecular bromine (Br2) is:
A.80 g
B.6.40 g
C.40 g
D.320 g

Answers

Atomic mass of bromine is 80 g. The mass of four moles of molecular bromine (Br₂) is 640 g. The correct alternative is not given.

To find the mass of four moles of molecular bromine (Br₂), you can use the formula:

mass = moles × molar mass

The molar mass of Br₂ is the atomic mass of bromine multiplied by two, since there are two atoms of bromine in each molecule of Br₂. So the molar mass of Br₂ is:
molar mass of Br2 = 80 g × 2 = 160 g

Now you can plug in the values for moles and molar mass into the formula:

mass = 4 moles × 160 g = 640 g

So the mass of four moles of molecular bromine (Br₂) is 640 g.

To know more about Atomic mass here:

https://brainly.com/question/29117302#

#SPJ11

is nh3 strong or weak?

Answers

Ammonia (NH₃) is a weak base.

When dissolved in water, ammonia reacts with water molecules to form ammonium ions (NH₄⁺) and hydroxide ions (OH⁻), according to the following equation:

NH₃ + H₂O ⇌ NH₄⁺ + OH⁻

Ammonia only partially dissociates in water, which means that it produces relatively few hydroxide ions compared to a strong base like sodium hydroxide (NaOH). Therefore, ammonia is considered a weak base.

The strength of a base is determined by its ability to donate hydroxide ions (OH⁻) in water, which is quantified by the base dissociation constant (Kb). The Kb value for ammonia is relatively low (1.8 x 10⁻⁵), compared to strong bases like sodium hydroxide (Kb value of 1.0 x 10¹⁴).

Overall, ammonia can still react with acids to form salts and water, but its reactivity is much weaker than that of a strong base.

To know more about Ammonia here

https://brainly.com/question/15409518

#SPJ4

How to Draw the Lewis Structure for SeF4

Answers

The lewis structure of the SeF₄ is as follows :

                 ..

                 |

                 ..

              : F :

     : F : - Se : - : F :

      °°       |          °°

             : F :

              °°

The total valence electrons in the  SeF₄ is the 34 electrons. The molecular structure of the  SeF₄ is the trigonal bipyramidal. The  Selenium that is Se is the least electronegative atom than the fluorine atom and therefore in the center of the structure.

In  SeF₄  Lewis structure with the Selenium which can hold the more than 8 valence electrons and there are the seven Fluorine atoms with the F.

To learn more about lewis structure here

https://brainly.com/question/20300458

#SPJ4

what is the molar mass of ferrocene?

Answers

The molar mass of the ferrocene is the 186.0 g/mol.

The molecular formula for the ferrocene is the C₁₀H₁₀Fe.

The molar mass of the carbon is 12 g/mol

The molar mass of the hydrogen is 1 g/mol

The molar mass of the Fe is 55.8 g/mol

The molar mass of the ferrocene , C₁₀H₁₀Fe is as

The molar mass of the ferrocene = 10 (12) + 10 (1) + 55.8

The molar mass of the ferrocene = 186 g/mol.

Thus, molar mass of the  ferrocene that is the C₁₀H₁₀Fe is 186 g/mol.

The ferrocene, C₁₀H₁₀Fe is also called as the  Dicyclopentadienyliron, this is the earliest and best known for the sandwich compounds.

To learn more about molar mass here

https://brainly.com/question/22997914

#SPJ4

how to write lewis structure for h2s?

Answers

The concept of covalent bond is introduced by the scientist G.N. Lewis. The Lewis structure of hydrogen sulfide is similar to that of water.

What is Lewis structure?

The structure in which the electrons of the compound are represented by dots is defined as the Lewis structure. It provide a picture of bonding in molecules in terms of the shared pairs of electrons and the octet rule.

The structure of H₂S contains two 'H' atoms and one 'S' atom. The central element is sulfur and two hydrogen atoms are linked with the help of a single bond. It has tetrahedral shape.

Thus the Lewis structure of H₂S is shown below.

To know more about Lewis structure, visit;

https://brainly.com/question/20300458

#SPJ1

The carboxyl group is made up of a carbon atom bonded to__________.

Answers

The carboxyl group is made up of a carbon atom bonded to an oxygen atom, a hydroxyl group (-OH), and a double-bonded oxygen atom.

The carboxyl group is an organic functional group characterized by a carbon atom bonded to an oxygen atom (-COOH) and a hydroxyl group (-OH). The carbon atom is also double-bonded to an oxygen atom, resulting in the formation of a carbonyl group (-C=O). This combination of functional groups makes the carboxyl group highly reactive, and it is a key component of many organic molecules, including carboxylic acids, amino acids, and many other biochemicals.

The presence of the carboxyl group gives these molecules acidic properties and makes them important components of metabolic reactions. The carboxyl group is also a common target for chemical modification and is used in many industrial and research applications, including drug development and chemical synthesis.

Learn more about carboxyl group:

https://brainly.com/question/26445709

#SPJ4

1) Predict the products of a chemical reaction.

a) Use your knowledge of atoms, bonding, and the periodic table to complete the chemical equation and predict the products of the chemical reaction on your paper.

Label this equation “Initial Prediction.” CH4 + O2 becomes ___________________

2) Write a few paragraphs predicting the products of the chemical reaction and explaining why you made this prediction. Your document should:

Answers

The products of the chemical reaction given are carbon dioxide and water.

The prediction was made based on the fact that the reaction of hydrocarbons with oxygen is a combustion reaction that produces carbon dioxide and water.

What is a combustion reaction?

Burning, also known as combustion, is a high-temperature exothermic redox chemical reaction that occurs when an oxidant, typically atmospheric oxygen, interacts with a fuel to generate oxidized, frequently gaseous products in a mixture known as smoke that includes carbon dioxide.

The equation of the reaction of CH₄ and O₂ is given below:

CH₄ + O₂ ----> CO₂+ H₂O

Learn more about combustion reactions at: https://brainly.com/question/12172040

#SPJ1

Select the appropriate pipette to use for each of the following volumes. a. 874 µLb. 57 µL c. 340 µL d. 15 µL

Answers

The pipette we can use for 874µL is A P1000 and for 57µL is A P20 and for 340µL is A P200 and for 15µL is A P10 .

To select the appropriate pipette, we need to choose one with a volume range that encompasses the desired volume, but also one that is precise enough for the required application. Here are some options:

a. 874 µL: A P1000 pipette would be appropriate, as it has a volume range of 100-1000 µL and can deliver volumes up to 1 mL with high precision.

b. 57 µL: A P20 pipette would be appropriate, as it has a volume range of 2-20 µL and can deliver volumes up to 20 µL with high precision.

c. 340 µL: A P200 pipette would be appropriate, as it has a volume range of 20-200 µL and can deliver volumes up to 200 µL with high precision.

d. 15 µL: A P10 pipette would be appropriate, as it has a volume range of 0.5-10 µL and can deliver volumes up to 10 µL with high precision.

Learn more about pipette here:

https://brainly.com/question/13719419

#SPJ4

in the laboratory, you could determine whether a colorless liquid was ethanol or a mixture of ethanol and sucrose by___

Answers

Sucrose is not highly soluble in ethanol, sucrose particles will be seen in the solution that contains both sugar and ethanol.

What is sucrose and ethanol?

Two moles of ATP are created during the fermentation of alcohol from one mole of glucose into two moles of ethanol and two moles of carbon dioxide. The sugar sucrose is made up of two sugars: glucose and fructose.

[tex]$$C_6H_{12}O_6 \rightarrow 2 C_2H_5OH + 2 CO_2[/tex]

Inorganic solvents like acetonitrile, benzene, pyridine, and methanol are easily soluble in sucrose octa acetate. At room temperature, it dissolves in 95% ethanol with a 12% (v/v) solubility.

A specific solute may be easily dissolved by some solvents but not by others. Differentiating between these solvents can be done by testing solubility. Because sucrose is not highly soluble in ethanol, sucrose particles will be seen in the solution that contains both sugar and ethanol.

To learn more about sucrose and ethanol refer to:

https://brainly.com/question/12044380

#SPJ4

________ is used to display the contents of a cell on multiple lines.A. The Wrap Text command
B. The active worksheet tab displays in red font.
C. Vertical dotted line between columns
D. Vertical or horizontal bars

Answers

A. The Wrap Text command is used to display the contents of a cell on multiple lines.

What is the Wrap Text command?

The Wrap Text command is a feature in Microsoft Excel that allows the contents of a cell to be displayed on multiple lines within the cell.

While entering text into an Excel cell, by default, the text will overflow into adjacent cells if it's longer than the width of the cell. However, the Wrap Text command allows to display the full text within the cell by automatically adjusting the row height to accommodate multiple lines of text.

To apply the Wrap Text command in Excel, select the cell or range of cells that has to be formatted, right-click on them, and choose Format Cells. In the Format Cells dialog box, go to the Alignment tab and select the Wrap Text checkbox. You can also access this option through the Home tab on the ribbon by clicking on the Wrap Text button.

Once applied the Wrap Text command to a cell, any text that exceeds the width of the cell will automatically wrap to the next line within the same cell. Adjust the row height manually by dragging the bottom border of the row to make all the wrapped text visible. If want to remove the text wrapping, simply uncheck the Wrap Text option.

To know more about The Wrap Text command, visit:

https://brainly.com/question/29891251

#SPJ1

What term describes the lowest temperature to which air can be cooled at constant pressure before saturation occurs?

Answers

The minimum temperature that air must be chilled to in order to reach saturation at or below 0°C (32°F).

Is the temperature to which air must be cooled at constant pressure to reach saturation?

The dew point is the temperature that must be reached while maintaining pressure for the air to become saturated, or for the relative humidity to reach 100%.

Simply said, the boiling point is also known as the saturation temperature. The term "saturation" refers to the temperature that a liquid must reach in order to boil and transition into the vapour phase based on its saturation pressure.

Intensity and chroma are other names for saturation. It speaks to the color's predominant hue. The "pure" hues are found at the outermost portion of the hue wheel. The hue we are using to describe the colour predominates less and less as you travel towards the centre of the wheel.

To learn more about saturation refer to:

https://brainly.com/question/601501

#SPJ4

many cell organelles, most notably the nucleus, are anchored by

Answers

intermediate filaments

Why is hexane non-polar?

Answers

Because it only contains carbon and hydrogen atoms, which evenly transfer electrons across all of the atoms in the molecule, hexane is a non-polar molecule.

The molecule is non-polar because electrons are distributed evenly throughout it as a result of this equitable sharing.

With the chemical formula C6H14, the hydrocarbon hexane indicates that it has six carbon atoms and fourteen hydrogen atoms. There occurs a formation of three covalent bond by using each carbon atom with hydrogen atom and one more with one carbon atom next to it.

These covalent connections, which require sharing electrons between atoms, require one or more electrons from each element.

Learn more about hexane:

https://brainly.com/question/30549157

#SPJ4

Each different signal in a 1H NMR spectrum represents a different__________of hydrogen atom. Hydrogen atoms that are_______________give the same signal.

Answers

The various signals in a 1H NMR spectrum correspond to various hydrogen atom types. Equivalent hydrogen atoms produce the same signal.

What signals represent in a 1H NMR spectrum?

The 1H NMR spectrum has three signals in total. 1,3-dimethylbenzene: The two protons in Hc and Hd are each one carbon away from a methyl group, while Hb is located between two methyl groups. The four aromatic protons can therefore be separated into three sets. It is comparable to have two methyl groups.

So, when a 1H NMR experiment is run, the spectrum will only contain one signal that represents all four hydrogens at a single chemical shift. [Here is the NMR spectra]

In terms of NMR, all three Ha protons and all three Hb protons are chemically equal to one another. The Ha and Hb protons are not chemically identical, though. Because of this, the Ha protons' resonance frequency differs from the Hb protons'.

To learn more about 1H NMR spectrum refer to;

https://brainly.com/question/30544771

#SPJ4

Precipitation of water on the land surface leads directly to ________.

Answers

Surface water bodies

Calculate the molecular mass of Ammonium chloride nh4cl

Answers

The molecular mass of a Ammonium chloride molecule, NH₄Cl is equals to the 53.5 g/mol.

We have a Ammonium chloride molecule, NH₄Cl. It consists one atom of nitrogen, one atom of chlorine and four atoms of hydrogen. Molecular mass of a molecule is the sum of the masses of the individual atoms within the quantities present in a molecule. So, the molecular mass of NH₄Cl, is sum of individual masses of hydrogen, nitrogen and chlorine atoms with number of their atoms. The atomic mass of chlorine atom, Cl = 35.5 g/mol

The atomic mass of hydrogen atom, H = 39.098 g/mol

The atomic mass of nitrogen atom, N

= 14 g/mol

Now, Molecular mass of NH₄Cl = 1× atomic mass of Nitrogen + 1×atomic mass of chlorine + 4× atomic mass of hydrogen atom

= 1×N + 1×Cl + 4×H

= 1× g/mol + 1×14 g/mol + 4×1 g/mol

= 35.5 g/mol + 14 g/mol + 4 g/mol

= 53.5 g/mol

Hence, the molecular mass of NH₄Cl is 53.5 g/mol.

For more information about Molecular mass, visit :

https://brainly.com/question/24191825

#SPJ4

an nacl solution is prepared by dissolving 20.0 g nacl in 150.0 g of water at 25°c. what is the vapor pressure of the solution if the vapor pressure of water at 25°c is 23.56 torr?A. 0.9304 torrB. 0.4746 torrC. 21.77 torrD. 0.8950 torrE. 22.63 torr

Answers

The vapor pressure of the solution is approximately 20.91 torr, which is closest to option C: 21.77 torr.

To calculate the vapor pressure of the solution, we can use Raoult's law, which states that the vapor pressure of a solution is proportional to the mole fraction of the solvent in the solution.

The mole fraction of water can be calculated as follows:

moles of water:

= (150.0 g / 18.015 g/mol) / [(150.0 g / 18.015 g/mol) + (20.0 g / 58.44 g/mol)]

= 0.887

Raoult's law states that the solution's vapour pressure is:

vapor pressure of water * mole fraction of water

= 23.56 torr * 0.887

= 20.91492 torr.

Learn more about   vapor pressure here:

https://brainly.com/question/11864750

#SPJ4

What is the volume of 128 g of oxygen at STP?

Answers

Standard Temperature and Pressure, or STP

1 mole of any gas takes up 22.4L at STP. Answer is 89.6L

What is STP (Standard Temperature and Pressure)?

Numerous thermodynamic tabulations and computations using STP. The density, viscosity, boiling point, and other characteristics of matter will change when the temperature or pressure changes. Calculations are made simpler and comparisons are made feasible by using a single set of criteria (or "state") to tabulate these data.

It is closely connected to the idea of matter in its usual state, sometimes known as "standard circumstances." Standard state does not always refer to a particular temperature, however 25 °C (298 K) is the most typical value used.

On a safety data sheet, the initials "STP" are most frequently found following a physical characteristic of the substance, such as density, flammable limit, or vapor pressure. The SDS's Section 9 (Physical and Chemical Properties) contains information on these characteristics.

To know more about STP, check the link below:

https://brainly.com/question/27100414

#SPJ4

The molar mass of nacl and the molar mass of caco3 contain approximately the same number of _____.

Answers

The molar mass of NaCl and the molar mass of CaCO₃ contain approximately the same number of grams per mol.

In science, the molar mass (M) of a chemical compound is characterized as the proportion between the mass and how much substance (estimated in moles) of any example of said compound.[1] The molar mass is a mass, not sub-atomic, property of a substance. The molar mass is a normal of many occasions of the compound, which frequently fluctuate in mass because of the presence of isotopes.

Most ordinarily, the molar mass is figured from the standard atomic weight and is consequently an earthly normal and an element of the overall wealth of the isotopes of the constituent particles on the planet. The molar mass is fitting for changing over between the mass of a substance and how much a substance for mass amounts.

i()Molar of mass : NaCl: 58.5 g/mol No. of Moles = Mass / Molar mass Mass = 1 × 58.5g Therefore, mass of 1 mole of NaCl is 58.5 g.

(ii) Molecular mass of CaCO₃ = (1 × Ca + 1 × C + 3 × O) = (1 × 40 + 1 ×12 + 3 × 16) = 40 + 12 + 48 = 100 Molar mass of CaCO₃ = 100 g

To know more about molar mass,visit here:

https://brainly.com/question/22997914

#SPJ4

The molecular formula of most monosaccharides represents a multiple of:a. CHOCHO.b. CHO2CHO2.c. CHO3CHO3.d. CH2OCH2O.e. CH3OCH3O.

Answers

Monosaccharides, also called sugars, have the typical molecular formula [C([tex]$$H_2O[/tex])]n.

What is the molecular formula of most monosaccharides?

Monosaccharides, also called sugars, have the typical molecular formula [C([tex]$$H_2O[/tex])]n, where n = 3–7, and can be classified as either aldehyde-aldoses or ketoses based on whether they contain an aldehyde or ketone functional group.

Examples of monosaccharides include glucose, fructose, galactose, ribose, and deoxyribose. Monosaccharides are one sugar unit (hexose sugar).

The simplest type of carbohydrates are monosaccharides. Monomers called monosaccharides are able to be combined to create more intricate carbohydrates. Carbon, hydrogen, and oxygen make up the molecules that make up monosaccharides.

The monosaccharides consist of simple sugars and their byproducts. The building blocks of more complicated molecules, they are the basic carbohydrate units. At least one hydroxyl group, an aldehyde (RCHO) or ketone (RCOR) group, and carbon atoms with hydrogen atoms attached are the components of monosaccharides.

Therefore, the correct answer is option a. CHOCHO.

To learn more about monosaccharides refer to:

https://brainly.com/question/1768793

#SPJ4

Is the dissolution of sodium acetate in water endothermic or exothermic?

Answers

The dissolution of sodium acetate in water is exothermic. The dissolution of sodium acetate in water is a chemical reaction that releases heat.

This reaction is exothermic, meaning that it releases energy in the form of heat into the surroundings. This occurs because the bonds between the sodium acetate molecules are broken during the dissolution process, and the energy required to break these bonds is released into the water. The amount of heat released during the reaction can be measured using a calorimeter, and can be used to calculate the enthalpy change for the reaction.

The exothermic nature of the dissolution of sodium acetate in water is due to the fact that the energy released by breaking the bonds between the sodium acetate molecules is greater than the energy required to separate the ions in the solution. This results in a net release of energy, which makes the reaction exothermic.

Learn more about endothermic and exothermic:

https://brainly.com/question/13014923

#SPJ4

Answer: The dissolution of sodium acetate in water is exothermic. The dissolution of sodium acetate in water is a chemical reaction that releases heat. This reaction is exothermic, meaning that it releases energy in the form of heat into the surroundings. This occurs because the bonds between the sodium acetate molecules are broken during the dissolution process, and the energy required to break these bonds is released into the water. The amount of heat released during the reaction can be measured using a calorimeter, and can be used to calculate the enthalpy change for the reaction. The exothermic nature of the dissolution of sodium acetate in water is due to the fact that the energy released by breaking the bonds between the sodium acetate molecules is greater than the energy required to separate the ions in the solution. This results in a net release of energy, which makes the reaction exothermic.

Explanation:

what is ca 540 instructions?

Answers

The CA 540 instruction is to make the adjustments to the federal adjusted gross income and to the federal itemized deductions by using the California law.

The CA (540), is the California Adjustments –  The Residents, to make the adjustments to the federal adjusted gross income and to the federal itemized deductions by using the California law. The CA 540 is the  California Resident Income Tax Return.

It is equal to total income we report that's the subject to the income tax, such as the earnings from the job, the self-employment, the dividends and the interest from the bank account - minus the specific deductions, the  adjustments that we are eligible to take.

To learn more about law here

https://brainly.com/question/30390837

#SPJ4

You have a sample of 35.2g of MgSO4. How many moles of MgSO4 are in the sample? Show all your work

Answers

General Stoichiometry

We must understand the relationship between moles, molar mass and mass to be able to solve questions with them:

[tex]n=\dfrac{m}{M}[/tex]

[tex]n[/tex] = moles[tex]m[/tex] = mass[tex]M[/tex] = molar mass

Solving the Question

We're given:

[tex]m[/tex] = 35.2 g[tex]M[/tex] = sum of Mg, S and O4: 120.368 g/mol (taken from Chemspider)

Apply the formula:

[tex]n=\dfrac{m}{M}[/tex]

[tex]n=\dfrac{35.2}{120.368}\\\\n=0.292\hspace{4}mol[/tex]

Answer

0.292 mol

give iupac names for the following compounds:
(a) Propylbenzene
(b) 3-Methylpentanenitrile
(c) 2,5-Dimethylheptane
(d) 3-Brome-3-chloroheptane
(e) 3-chloropropanal
(f) 2,2-Dichloroethanol

Answers

The IUPAC names for the following compounds are :

(a) Propylbenzene

(b) 3-Methylpentanenitrile

(c) 2,5-Dimethylheptane

(d) 3-Brome-3-chloroheptane

(e) 3-chloropropanal

(f) 2,2-Dichloroethanol

The IUPAC naming rules are the certain rules that are regarding the naming of the organic compounds. The compounds will be numbered based on the longest chain of the carbon atoms in it. The numbering will be starts from the position of the double bond or the triple bond.

The name will be given in the alphabetical order with the prefix of the functional groups and the number is  in the manner that the carbons atoms containing the functional groups will have the small numbers.

To learn more about IUPAC here

https://brainly.com/question/30086566

#SPJ4

The colligative molality of seawater is approximately 1.10 m. Calculate the vapor pressure of sea water at 20°C. The vapor pressure of pure water at 15°C is 17.54 Torr?

Answers

The vapor pressure of sea water at 20°C is 0.45 Tor.

First, we calculate the mole fraction of salt in seawater. We can use the formula:

X₂ = moles of salt / (moles of salt + moles of water)

The molar mass of seawater is approximately 0.9645 kg/mol, so the mass of water in 1 kg of seawater is:

mass of water = 1 kg / (1 + 0.9645 kg/mol) = 0.5093 kg

Therefore, the moles of water in 1 kg of seawater are:

moles of water = mass of water / molar mass of water = 0.5093 kg / 0.01802 kg/mol = 28.32 mol

Using the molality, we can calculate the moles of salt in 1 kg of seawater:

moles of salt = molality × mass of water = 1.10 mol/kg × 0.5093 kg = 0.560 mol

Therefore, the mole fraction of salt in seawater is:

X₂ = 0.560 mol / (0.560 mol + 28.32 mol) = 0.0195

Next, we can use the given vapor pressure of pure water at 15°C to calculate the vapor pressure of pure water at 20°C.

ln(P₂°/P₁°) = (ΔH_vap / R) × (1/T₁ - 1/T₂)

ln(P₂°/17.54 Torr) = (40.7 kJ/mol / (8.314 J/(mol·K))) × (1/288.15 K - 1/293.15 K)

Solving for P₂°, we get:

P₂° = 18.91 Torr

Finally, we can use the equation for the change in vapor pressure to calculate the vapor pressure of seawater at 20°C:

ΔP = X₂ × P₂° × i₂

ΔP = 0.0195 × 18.91 Torr × 1.2

ΔP = 0.45 Tor

To know more about vapor pressure here

https://brainly.com/question/11864750

#SPJ4

why compound be broken down into simpler substances

Answers

A compound can be broken down into simpler substances because it is made up of two or more different elements that are chemically combined together. When a compound is broken down, it results in the formation of new substances that have different properties than the original compound.

Compounds are formed through a chemical reaction between different elements, and the resulting substance is held together by chemical bonds. These bonds can be broken through various processes such as heating, electrolysis, or chemical reactions. Once the bonds are broken, the individual elements that make up the compound are released and can be isolated.

The ability to break down compounds into simpler substances is an important aspect of chemistry, as it allows scientists to study the properties and behavior of individual elements. It also plays a crucial role in industries such as pharmaceuticals and agriculture, where compounds are broken down to extract useful substances. Understanding the composition and behavior of compounds is fundamental to advancing our knowledge of the natural world and improving our quality of life.

Learn more about compound

brainly.com/question/19831841

#SPJ4

The complete question is-

Are the properties of two proteins with the same type and number of amino acids but a different order of linkage the same?

An NaCl solution is prepared by dissolving 90.0 g NaCl in 250.0 g of water at 25°C. What is the vapor pressure of the solution if the vapor pressure of water at 25'C is 23.56 torr? 21.21 torr 2.354 torr 1239 torr 19.28 torr 2.140 torr

Answers

The correct answer to this solution is

Using Raoult's Law

P solution = X solvent * P0 solvent

Where, X solvent = mole fraction of solvent

P0 solvent= vapor pressure of pure solvent = 23.56 torr

Number of moles of solute

= mass/molar mass = 90.0g / 58.44g/mol

= 1.540 moles

However, number of moles of solute particles (n1) after complete dissociation

= 2*1.540 = 3.08 moles

Number of moles of solvent (n2) = 250.0g/18.02g/mol

= 13.874 moles

X solvent = (n,)/ (n, +n,)

                = 13.874 / (3.08+13.874)

                = 0.8183

Learn more about vapor pressure here brainly.com/question/11864750

#SPJ4

Other Questions
once a company has identified its competitive advantages and chosen the ones that define its market niche, what is its next step? What term should be inserted in m +........+ 1/m it a perfect square? Place the steps of the consumer decision process in order, with the first step at the top.Need RecognitionInformation SearchAlternative EvaluationPurchase and ConsumptionPostpurchase The population of the world grows approximately 1. 1% per year. If the population of the world is approximately 8 billion people in 2022, write an exponential equation to model the world population (in billions) after t years why cant exponential equations be zero fill the Blank?the two most important inventory-based questions answered by the typical inventory model are ______. Three objects having the same mass begin at the same height, and all move down the same vertical distance H. One falls straight down, one slides down a frictionless inclined plane, and one swings on the end of of a string. In which case does the object have the biggest total work done on it by all forces during its motion? Free Fall Incline String Same If a box of gloves cost $7.73 for 100, how much for each glove? How do I find endpoints in Wireshark? Which of the following is not a goal of the Intelligent Enterprise?Multiple Choicea. recommend how to manage problemsb. prioritize our workc. automate simple tasksd. complete our work for us How much did the Buffalo Soldiers get paid? Twice the difference of a number and 7 equals 3(GIVING AWAY 15 POINTS) Which is the most accurate and reliable means of taking body temperature?A. oralB. aural or tympanicC. axillaryD. rectal Do you consider it important to restore the Battleship Missouri?O YesO NoExplain why you voted the way you did. which of the following lists the number of points at which a circle can intersect a triangle? 2 and 6 only 2, 4, and 6 only 1, 2, 3, and 6 only 1, 2, 3, 4, and 6 only 1, 2, 3, 4, 5, and 6 tudies have found that listening occupies of a college student's communicating time.answer choicesless than 10%less than 30%more than 50%more than 70%about 95% How did industrialization impact the environment? Provide two historical examples to support your claim. T or F: Margo is a district manager who oversees several store managers in a national chain of department stores. Margo reports directly to the vice president of stores and marketing, a member of top management. Margo is a middle manager. How many total points are awarded in this election? The table shows the total distance that Myra runs over different time periods.A 2-column table with 5 rows titled Time and Distance Ran by Myra. The first column is labeled Time (minutes) with entries 0, 2, 4, 6, 8. The second column is labeled Distance (miles) with entries 0.0, 0.4, 0.8, 1.2, 1.6.