1 Define Soft water and Hard water.​

The IUPAC name for 2,3,7,9-tetramethyl-5-(1-methylbutyl)decanoic acid is 2,3,7,9-tetramethyl-5-(1-methylbutyl)decanoic acid. It is a carboxylic acid with a molecular formula of C20H40O2 and a molecular mass of 312.54 g/mol. The compound has a melting point range of 70-75°C.

2,3,7,9-tetramethyl-5-(1-methylbutyl)decanoic acid contains a carboxyl group (-COOH), which is the functional group responsible for its acidic properties and solubility in water. The presence of the carboxyl group makes the compound more polar than similar molecules, enhancing its water solubility. Carboxylic acids are also known for their reactivity with bases and ability to undergo esterification reactions.

In summary, 2,3,7,9-tetramethyl-5-(1-methylbutyl)decanoic acid is a carboxylic acid with a unique molecular structure. Its IUPAC name describes the positions and nature of the substituent groups. The presence of the carboxyl group contributes to its polarity, water solubility, acidity, and reactivity with bases and esterification reactions. The compound's characteristics are significant in understanding its properties and potential applications in various chemical reactions and processes.

for such more questions on  compound

https://brainly.com/question/29108029

#SPJ8

The piece of evidence that best identifies the type of reaction as nuclear or chemical is: Chemical, because a new substance is formed. Option 4

In this scenario, the observation that a new substance is formed is a key characteristic of a chemical reaction. Chemical reactions involve the rearrangement of atoms to form different substances with distinct properties. The formation of a new substance indicates a chemical change has occurred.

The other pieces of evidence listed do not necessarily point to a nuclear reaction:

Chemical, because energy is released during the reaction: Energy can be released in both nuclear and chemical reactions, so this observation alone is not sufficient to determine the type of reaction.

Nuclear, because energy is released during the reaction: While energy can be released in nuclear reactions, it is not exclusive to them. Chemical reactions can also release energy, such as in exothermic reactions.

Nuclear, because the mass decreased after the reaction: This observation suggests a change in mass, which could be indicative of a nuclear reaction. However, it is important to consider that chemical reactions can also involve changes in mass, such as the formation of gases or dissolution of a solid.

Overall, the most conclusive evidence to identify the type of reaction is the formation of a new substance, which aligns with a chemical reaction.

Option 4

For more such questions on Chemical visit:

https://brainly.com/question/29886197

#SPJ8

The work associated with the decomposition of TNT upon detonation can be determined by using the First Law of Thermodynamics.

According to the First Law, the change in internal energy (ΔU) of a system is equal to the heat added to the system (q) minus the work done by the system (w).

In this case, the reaction is exothermic and heat is released, meaning that q is negative. The work done by the system can be calculated using the equation:

w = -PΔV

where P is the pressure and ΔV is the change in volume is used to calculate the work done by the system.

Learn more on law of thermodynamics here: https://brainly.com/question/26035962

#SPJ1

26.8L is the volume, in liters, of 1.20 mol of C\(_3\)H\(_8\) gas at STP. A measurement of three-dimensional space is volume.

A measurement of three-dimensional space is volume. It is frequently expressed quantitatively using SI-derived units, like the cubic metre or litre, or different imperial or US-standard units, including the gallon, quart and cubic inch. Volume and length (cubed) have a symbiotic relationship.

The volume of an envelope is typically thought of as its capacity, not as the amount of space it takes up. In other words, the volume is the quantity of fluid (liquid or gas) that the container may hold.

Volume = 1.20×22.4

              =26.8L

To know more about volume, here:

https://brainly.com/question/1578538

#SPJ1

The density of the substance is 200 kg/m³.

Density can be defined as the ratio of the mass and volume of an object.

The S.I unit of Density is kg/m³.

The formula of density of the substance is given as,

Formula:

Where:

From the diagram,

Substitute these values into equation 1

Hence, the density of the substance is 200 kg/m³.

Learn more about density here: https://brainly.com/question/1354972

#SPJ1

Answer:

It would be 200

Explanation:

Thank you

The molecular weight of \((NH_4)_2SO_4\) would be 132 g/mol.

The molecular weight, otherwise known as the molar mass of substances is the sum of the molar weights of individual atoms that make up the substance.

\((NH_4)_2SO_4\) is made up of 2 atoms of N, 8 atoms of H, 1 atom of S, and 4 atoms of O.

Thus, the molecular weight of \((NH_4)_2SO_4\) = (14x2) + (1x8) + 32 + (16x4)

                                                                     = 132 g/mol

In other words, the molecular weight of \((NH_4)_2SO_4\) is 132 g/mol.

More on molecular weights can be found here: https://brainly.com/question/14507491

#SPJ1

Answer:

c) H2O and HSO4-

Explanation:

The dehydration of 2-methylcyclohexanol occurs in the presence of H2SO4. Recall that acids are proton donors in solution; the equilibrium shown below is then set up,

H2SO4(aq)  +  H2O(l) ⇄H3O^+(aq) + HSO4^-(aq)

The species H2O and HSO4- are two proton acceptors in the system. According to the Brownstead- Lowry definition, a base is a proton acceptor in solution.

Hence H2O and HSO4- are bases present in the dehydration of 2-methylcyclohexanol.

The sample of air should be heated to 252 Kelvin (K) to increase its volume by 25%.

It is possible to determine the temperature to which the sample of air should be heated by using the concept of the ideal gas law. PV = nRT is the ideal gas law, and it relates the pressure (P), volume (V), number of moles (n), temperature (T), and gas constant (R). we can focus on the relationship between volume and temperature since the number of moles and pressure are assumed to be constant.

By showing the increase in volume as a percentage (25%), we can make the equation (V+0.25V)/T = V/T, where V represents the initial volume of the air.

On making the equation simple, we find  Tfinal / Tinitial = 1.25.

To solve for Tfianal, the final temperature,

Tfinal = Tinitail / 1.25

On substituting the initial temperature value of 315K into the equation, we will be getting;

Tfinal = 315K / 1.25

Tfinal = 252K

Hence, the sample of air should be heated to 252 Kelvin (K) in order to increase its volume by 25%.

To learn more about ideal gas law,

https://brainly.com/question/27870704

Answer:

answer no.1

1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p¹

Explanation:

if you are not sure..between 1st and 2nd just sum all the "exponents" and you should get the atomic number.. in this case 31.

Answer:

A.H

Explanation:

These substances have dispersed particles that are large enough to scatter light, making the beam visible. Therefore, out of the options provided, a mixture that scatters light is an example of a colloid. Option B)

A colloid is a type of mixture in which particles are dispersed throughout a medium, creating a homogeneous appearance. Unlike solutions, where the particles are completely dissolved, and suspensions, where the particles settle out, colloids have particles that are larger than those in solutions but smaller than those in suspensions. One characteristic of colloids is that they can scatter light due to the size of the particles. This scattering of light is known as the Tyndall effect. Examples of colloids include milk, fog, and aerosol sprays. These substances have dispersed particles that are large enough to scatter light, making the beam visible. Therefore, out of the options provided, a mixture that scatters light is an example of a colloid. Therefore option B) is correct

For more question on mixture

https://brainly.com/question/24647756

#SPJ8

Note Complete Question

which is an example of a colloid?

a mixture that settles out,

b mixture that scatters light,

c mixture that is separated by filtration,  

d salt and water mixture?

A proper standard curve shows D. a linear relationship when plotting Concentration vs. Absorbance.

A standard curve is used to determine the concentration of an unknown sample by comparing its absorbance to a series of known standards with known concentrations. The most common way to plot a standard curve is to graph the absorbance on the y-axis and the concentration of the standards on the x-axis. When plotted in this way, a proper standard curve should show a linear relationship, where the absorbance is proportional to the concentration of the standard.

Therefore, option D, a linear relationship when plotting Concentration vs. Absorbance, is the correct answer.

Learn more about standard curve here: https://brainly.com/question/13445467

#SPJ4

Answer:

When HCl (hydrochloric acid) and KOH (potassium hydroxide) are neutralized, they react to form water (H2O) and a salt (KCl). The balanced equation is:

HCl + KOH → KCl + H2O

In this reaction, one mole of HCl reacts with one mole of KOH to form one mole of water and one mole of KCl.

During titration of HCl with KOH, the point at which the reaction is complete is called the equivalence point. At the equivalence point, the moles of H+ ions and OH- ions are equal in the titration mixture.

Since one mole of HCl reacts with one mole of KOH, and H+ ions are present in HCl and OH- ions are present in KOH, the number of moles of H+ ions will be equal to the number of moles of OH- ions at the equivalence point.

Therefore, at the equivalence point, the number of moles of H+ ions will be equal to the number of moles of OH- ions in the titration mixture when HCl is exactly neutralized by KOH.

When the HCl is neutralized by KOH, the equivalence point is reached. During titration, the amount of HCl is determined using a basic solution of known concentration.

It is possible to calculate the amount of KOH required for complete neutralization if the initial concentration of the HCl solution is known. The balanced chemical equation for the reaction between HCl and KOH is:HCl + KOH → KCl + H2OThe stoichiometry of the reaction indicates that one mole of HCl reacts with one mole of KOH to produce one mole of H2O. Thus, the number of moles of H+ ions is equal to the number of moles of OH- ions when the equivalence point is reached.In an acid-base reaction, the number of moles of hydrogen ions (H+) produced by the acid is equal to the number of moles of hydroxide ions (OH-) produced by the base. When the HCl is exactly neutralized by the KOH, the number of moles of H+ ions is equal to the number of moles of OH- ions in the titration mixture.

This is due to the balanced chemical equation for the reaction, which shows that one mole of HCl reacts with one mole of KOH to produce one mole of water (H2O).Thus, at the equivalence point, the number of moles of H+ ions is equal to the number of moles of OH- ions. This is the point at which all of the HCl has reacted with the KOH. After the equivalence point, the excess KOH will react with the H2O to produce OH- ions, resulting in a basic solution.

for such more questions on solution

https://brainly.com/question/25326161

#SPJ8

Answer: 13.4

Explanation: i guessed it and got it correct on ck-12

STP is the standard pressure and temperature condition of the ideal gas. 0.13 moles of dinitrogen monoxide will be present at STP.

An ideal gas equation is a relation between the pressure, volume with moles, gas constant, and the temperature of the ideal gas. The ideal gas equation is given by,

\(\rm PV = nRT\)

Given at STP,

Pressure = 1 atm

Volume = 300 L

Moles = ?

Gas constant =8.3144598 J per mol per Kelvin

Temperature = 273 K

Substituting values in the ideal gas equation we get:

\(\begin{aligned} \rm n &= \rm \dfrac{ PV}{RT}\\\\&= \dfrac{1 \times 300}{273 \times 8.314}\\\\&=0.1321\end{aligned}\)

Therefore, 0.13 moles of dinitrogen monoxide are produced at STP.

Learn more about STP here:

https://brainly.com/question/15828565

Answer:

Volume = 3.4 L

Explanation:

In order to calculate the volume of CO₂ produced when 15.2 g of CaCO₃ is heated, we need to first write out the balanced equation of the thermal decomposition of CaCO₃:

CaCO₃ (s) + [Heat] ⇒ CaO (s) + CO₂ (g)

Now, let's calculate the number of moles in 15.2 g CaCO₃:

mole no. = \(\mathrm{\frac{mass}{molar \ mass}}\)

                 = \(\frac{15.2}{40.1 + 12 + (16 \times 3)}\)

                 = 0.1518 moles

From the balanced equation above, we can see that the stoichiometric molar ratios of CaCO₃ and CO₂ are equal. Therefore, the number of moles of CO₂ produced is also 0.1518 moles.

Hence, from the formula for the number of moles of a gas, we can calculate the volume of  CO₂:

mole no. = \(\mathrm{\frac{Volume \ in \ L}{22.4}}\)

⇒ \(0.1518 = \mathrm{\frac{Volume}{22.4}}\)

⇒ Volume = 0.1518 × 22.4

                 = 3.4 L

Therefore, if 15.2 g of CaCO₃ is heated, 3.4 L of CO₂ is produced at STP.

Answer:

well there are many ways to prevent a pest infestation ..... as we all know ... insects such as ants love leftovers, so store food in airtight containers like Tupperware or jars with rubber seals on the lids.

Keep a tight lid on your trash can at all times and move the trash to an outside dumpster as soon as possible.

Clean your counter tops, tables, and floors on a regular basis to prevent crumbs or food buildup

Explanation:

Hope this helps:)

The claim that paraffin wax would float in ethanol (d = 789 kg/L) is accurate.

A 40–50% aqueous solution would have a density that could be adjusted to be just below that of paraffin wax, while regular alcohol (ethanol) has a density of roughly 0.8. The wax would then begin to sink. Warming causes the wax's density to significantly decrease (more than ethanol does), causing it to float.

Even with your lungs completely expanded, you cannot float in 80-proof (or 40%) alcohol since your body weighs more than the booze and will sink if you stop swimming.

To know more about paraffin wax visit:-

https://brainly.com/question/16121848

#SPJ1

Answer:

“You Asked” is a series where Earth Institute experts tackle reader questions on science and sustainability. Over the past few years, we’ve received a lot of questions about carbon dioxide — how it traps heat, how it can have such a big effect if it only makes up a tiny percentage of the atmosphere, and more. With the help of Jason Smerdon, a climate scientist at Columbia University’s Lamont-Doherty Earth Observatory, we answer several of those questions here.

Each species is a separate type of organism.

Therefore, Each species is not considered a group.

Learn more about taxonomy here:

https://brainly.com/question/1304906

#SPJ9

The free energy is 6.128 kJ/mol

Free energy, also known as Gibbs free energy, is a thermodynamic quantity used to describe the energy available to do work in a system

The concept of free energy is important in many areas of chemistry, including chemical thermodynamics, biochemistry, and materials science. It is used to understand and predict the behavior of chemical reactions, phase transitions, and other thermodynamic processes.

ΔG = ΔG° + RTlnQ

ΔG = 3.2 * 10^3 + (8.314 * 295 * ln(3.3)

=   3.2 * 10^3 + 2.928 * 10^3

= 6.128 * 10^3 J/mol

or 6.128 kJ/mol

Learn more about free energy:https://brainly.com/question/15319033

#SPJ1

Using the dimensional analysis, The conversion of 500.0 calories is 2.092 x 10⁶ joules.

The Joule is the unit of work or energy in the SI system (J). A force of one Newton traveling one meter in its own direction produces the work equivalent to one joule.

Our bodies store extra calories as body fat when we consume more calories through food and drink than we burn off. If this keeps happening, we might eventually gain weight.

There are different units, which is why there is a conversion of these units.

1 kilocalorie = 4184 joule

500 x  4184 =  2.092 x 10⁶

500.0 = 2.092 x 10⁶

Thus, the conversion is 500.0 calories is 2.092 x 10⁶ joules.

To learn more about joules, refer to the below link:

https://brainly.com/question/4951762

#SPJ1

Answer:

Sugar, Carbon Dioxide, And Water

Explanation:

A chemical substance is a form of matter having constant chemical composition and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical bonds. Chemical substances can be simple substances, chemical compounds, or alloys. Chemical elements may or may not be included in the definition, depending on expert viewpoint.

Answer:

14.

Explanation:

Answer:

14 hope this helps

Explanation:

Atomic Mass-Atomic  Number my guy

Answer:

B. Weathering and Erosion

Explanation:

I majored in Chemistry

Answer:

b

Explanation:

The new volume of the balloon after heating it to a temperature of 51 °C is approximately 2.39 L.

Charles's law states that "the volume occupied by a definite quantity of gas is directly proportional to its absolute temperature.

It is expressed as;

\(\frac{V_1}{T_1} =\frac{V_2}{T_2}\)

Given that:

Substituting the given values and solve for V₂:

\(V_1T_2 = V_2T_1\\\\V_2 = \frac{V_1T_2}{T_1} \\\\V_2 = \frac{2.2\ *\ 324.15}{298.15 }\\ \\V_2 = 2.39 \ L\)

Therefore, the final volume is 2.39 litres.

Learn more about Charles's law here: https://brainly.com/question/23122443

#SPJ1

55.85 g/mol

Average atomic mass and molar mass are connected values that can help explain the weight of an atom.

Average Atomic Mass

The average atomic mass is given in amus. Amu stands for atomic mass unit, which describes the number of neutrons and protons in an atom. For example, if an atom has 55 neutrons and protons it will have an atomic mass of 55 amu.

It is called average atomic mass because every element has multiple isotopes, meaning it is possible to have different atomic masses. So, scientists take all the isotopes and average them with respect to their abundance in the natural world. This creates the average atomic mass.

Molar Mass

The molar mass is the number of grams in one mole of a molecule (g/mol). One mole is equal to 6.022 x 10²³ atoms. This number was not randomly chosen. If you take 6.022 x 10²³ atoms of Carbon-12 (with 12 being the atomic mass) then you will have 12 grams. Thus, using this number of atoms to create 1 mole means that grams per mole will be equal to amus.

So, given the average atomic mass of iron, we can easily find the molar mass.

Answer:

0.595 M

Explanation:

The number of moles of water in 1L = 1000g/18g/mol = 55.6 moles of water.

Mole fraction = number of moles of KNO3/number of moles of KNO3 + number of moles of water

0.0194 = x/x + 55.6

0.0194(x + 55.6) = x

0.0194x + 1.08 = x

x - 0.0194x = 1.08

0.9806x= 1.08

x= 1.08/0.9806

x= 1.1 moles of KNO3

Mole fraction of water= 55.6/1.1 + 55.6 = 0.981

If

xA= mole fraction of solvent

xB= mole fraction of solute

nA= number of moles of solvent

nB = number of moles of solute

MA= molar mass of solvent

MB = molar mass of solute

d= density of solution

Molarity = xBd × 1000/xAMA ×xBMB

Molarity= 0.0194 × 1.0627 × 1000/0.981 × 18 × 0.0194×101

Molarity= 20.6/34.6

Molarity of KNO3= 0.595 M

A. Balance B is more accurate.

B. Balance A is more precise.

To determine which balance is more accurate and which one is more precise, let's analyze the data provided:

A. Accuracy:

To assess accuracy, we need to compare the average measurements from each balance to the true value, which is 5.00 g.

For Balance A:

Average weight measured = (4.2 g + 4.1 g + 4.3 g + 4.2 g) / 4 = 16.8 g / 4 = 4.2 g

For Balance B:

Average weight measured = (5.1 g + 4.9 g + 4.7 g + 5.2 g) / 4 = 20.9 g / 4 = 5.225 g

Comparing the averages to the true value:

Accuracy of Balance A = |4.2 g - 5.00 g| = 0.8 g

Accuracy of Balance B = |5.225 g - 5.00 g| = 0.225 g

Since the accuracy is determined by the difference between the measured values and the true value, Balance B is more accurate as it has a smaller difference.

B. Precision:

Precision refers to how close the measured values are to each other. To assess precision, we can calculate the standard deviation of the measurements from each balance.

For Balance A:

Standard deviation = \(\sqrt([ (4.2 g - 4.2 g)^{2} + (4.1 g - 4.2 g)^{2} + (4.3 g - 4.2 g)^{2} + (4.2 g - 4.2 g)^{2}]/4)\)

Standard deviation = \(\sqrt([0 + (-0.1)^{2} + 0.1^{2} + 0]/4)\) = \(\sqrt(0.02 / 4)\)

= \(\sqrt(0.005)\) ≈ 0.071 g

For Balance B:

Standard deviation = \(\sqrt([ (5.1 g - 5.225 g)^{2} + (4.9 g - 5.225 g)^{2} + 4.7 g - 5.225 g)^{2} + (5.2 g - 5.225 g)^{2}] / 4)\)

Standard deviation = \(\sqrt([0.075 ^{2} + (-0.325)^{2}) + (-0.525)^{2} + (-0.025)^{2}] / 4)\)

≈ 0.213 g

Comparing the standard deviations:

Precision of Balance A ≈ 0.071 g

Precision of Balance B ≈ 0.213 g

Since precision is determined by the spread or variability of the measured values, Balance A is more precise as it has a smaller standard deviation, indicating less variation in the measurements.

The question was incomplete. find the full content below:

A student is weighing a standard 5.00-g weight four times on two different balances to check them for accuracy and precision. The following table shows the data:

Trial - 1,2,3,4

Balance A - 4.2 g, 4.1  g, 4.3 g, 4.2 g

Balance B - 5.1 g, 4.9  g, 4.7 g, 5.2 g

A. Which of the balances is more accurate?

B. Which is more precise?

Know more about standard deviation here:

https://brainly.com/question/30403900

#SPJ8

Answer:

B

Explanation:

muscles attach to the skeleton in order for the body to be sturdy. as you probably know, the skeletal system is mainly used for providing support to the body so it won't fall down.

Answer:

4

Explanation:

The zeros before a non zero digit do not count as significant figures so there are 4 sig figs in the number