because flammable and combustible liquids are class b materials,: select one: a. they will typically sink in water. b. foam concentrates are ineffective extinguishing agents. c. their vapors are non-toxic. d. water is an ineffective extinguishing agent. clear my choice

Answer:

Hydrogen Chloride is 74.64 grams.

Explanation:

Using the given information, we can find the amount of grams of hydrogen chloride that take place in the reaction.

Due to the Law of Conservation of Mass, the mass of the system must remain constant. To find the value of x, make the equation below.

\(24.30 + x=2.04 + 96.90\)

The left side represent the reactant side of the chemical reaction and the right side represents the product side.

\(2.04 + 96.90= 98.94\)

\(24.30+x=98.94\)

\(24.30 - 24.30 + x= 98.94 - 24.30\)

\(x=74.64\)

Sucralose is present in the sample at a mass percent of 97.35 % and vitamin C at 2.65%

We can calculate the moles from osmotic pressure formula

Π = iMRT (Osmotic pressure) 

Van't Hoff factor i = 1

moles/volume = M

Now,

ππ= inVRT ——> (1)

R = 0.0821 L.atm.K.mol⁻¹

T = 301K

Volume = 28 ml, or 0.028 liters.

Next, using equation (1)

n = (π × 0.028 L) / (1× 0.0821 L.atmK⁻¹mol⁻¹× 301 K)

Mole = 0.00356 moles.

Given the quantity of samples and that sucralose has a mass of Y g and vitamin C has a mass of X g,

e = 1.371 g

X + Y = 1.371  g

Y = 1.371  g - X ----> (2)

The mass percent of vitamin c is 39.34 % and sucralose is 60.66 % in the sample.

Since vitamin C (VC) has a molecular mass of 176 g/mol while sucralose has a molecular weight of 398 g/mol. The sum of the moles of VC and sucralose is therefore the total amount of moles.

0.00356 moles = X/176 + (1.371 - X)/398

70,048(0.00356) = 398 X + 176(1.371 - X)

249.37 = 398 X +241.296 - 176 x

8.074 = 222x

X = 0.0364 gram (vit c)

Now, using eq (2);

Y =  1.371g - 0.0364 g

Y = 1.3346 gram (sucralose)

Thus, Vitamin C Mass Percentage is equal to 0.0364 g x 100 / 1.371g.

= 2.65%

Sucralose mass % =  1.3346g 100 / 1.371g

= 97.35 %

Want to know more about mass percent visit the link which is given below;

brainly.com/question/5394922

#SPJ4

if we dissolve 20.1 g of nickel(ii) iodide in a volumetric flask and add water to a total volume of 125 . ml, then the molarity of the solution is 160.8M.

Molarity is a term which is defined as the ratio of mass of solute to the given volume of solution in litre.

The substance which is present in smaal quantity is termed as solute.

The overall solute and solvent combine to form solution.

Mathematically, Molarity can be written as

Molarity = mass of solute/ volume of solution in litre.

Given,

Mass of Nickel iodide = 20.1 g

Volume of solution = 125 ml

By substituting all the values, we get

20.1 × 1000 / 125

= 160.8 M

Thus, we concluded that if we dissolve 20.1 g of nickel(ii) iodide in a volumetric flask and add water to a total volume of 125 . ml, then the molarity of the solution is 160.8M.

learn more about Molarity:

https://brainly.com/question/19517011

#SPJ4

Temperature can be manipulated to help identify the ion in solution by observing the solubility of the ions at different temperatures.

For example, if the solution is heated and the solubility of Pb^2+ (aq) increases, then it is likely that the ion in solution is Pb^2+ (aq). On the other hand, if the solubility of Ag^+ (aq) increases when the solution is heated, then it is likely that the ion in solution is Ag^+ (aq). This is because the solubility of different ions varies with temperature, and by observing the changes in solubility at different temperatures, it is possible to identify the ion in solution.

It should be noted that observing changes in solubility alone may not be sufficient to definitively identify the ion in solution, as other factors such as the presence of other ions or complex formation may also affect solubility. Additional tests or techniques may be necessary to confirm the identity of the ion.

This question should be provided as:

Learn more about ion https://brainly.com/question/13692734

#SPJ11

If a language uses the same word to describe both blue and green hues, it could potentially impact how speakers of that language perceive and categorize colors. This phenomenon is known as "linguistic relativity" or the Sapir-Whorf hypothesis.

In this scenario, individuals speaking this language might not distinguish between blue and green in the same way that speakers of other languages do. They may not have separate labels for these colors, leading to a different way of perceiving and discussing them.

For example, if someone from this language were to encounter different shades of blue and green, they might struggle to differentiate between them or describe them accurately. This could affect their ability to perceive subtle variations in color and distinguish between different objects or environments.

Their view of the world would be influenced by their language, potentially leading to a different understanding and interpretation of colors. They might develop a broader category for blue and green, perceiving them as variations of the same color rather than distinct entities.

It's important to note that this hypothetical scenario may not represent the reality of any specific language. Linguistic relativity is a complex topic, and while language can influence perception, it does not determine it entirely. Our perception of colors is also influenced by cultural, environmental, and individual factors.

In summary, if a language uses the same word for blue and green hues, it could impact how individuals perceive and categorize colors, potentially leading to a different way of viewing the world.

To know more about language visit-

https://brainly.com/question/32089705

#SPJ11

Answer:

Test answers

1. Water carving out a limestone cave

2. Oxidation

3. Acid rain

(Got 100%)

Explanation:

The primary agents of chemical weathering are water, oxygen and acids. So acid rain is an agent of chemical weathering. Option C is correct.

Water, and many chemical compounds found in water, is the main agent of chemical weathering.  One of the most abundant rock-forming minerals, chemically reacts with water and water-soluble compounds to form clay.

Water contains many weak acids such as carbonic acid. The primary agents of chemical weathering are water, oxygen and acids.

These react with surface rocks to form new minerals that are stable in, or in equilibrium with, the physical and chemical conditions present at the earth's surface.

Hence, option C is correct.

To learn more about chemical weathering follow the link below;

https://brainly.com/question/14426457

#SPJ2

the volume of the 0.12 M sulfuric acid solution containing 0.33 mol of sulfuric acid is 2.75 liters.

To determine the volume of the sulfuric acid (H2SO4) solution, we need to use the relationship between moles, concentration, and volume.

The given information is:

Number of moles of sulfuric acid (H2SO4) = 0.33 mol

Concentration of sulfuric acid solution = 0.12 M

The formula relating moles, concentration, and volume is:

Moles = Concentration * Volume

Rearranging the formula to solve for Volume:

Volume = Moles / Concentration

Plugging in the given values:

Volume = 0.33 mol / 0.12 M

Calculating the volume:

Volume = 2.75 liters

To know more about moles visit;

brainly.com/question/30885025

#SPJ11

Answer:

1. 0.125 mole

2. 42.5 g

3. 0.61 mole

Explanation:

1. Determination of the number of mole of NaOH.

Mass of NaOH = 5 g

Molar mass of NaOH = 23 + 16 + 1

= 40 g/mol

Mole of NaOH =?

Mole = mass /molar mass

Mole of NaOH = 5/40

Mole NaOH = 0.125 mole

2. Determination of the mass of NH₃.

Mole of NH₃ = 2.5 moles

Molar mass of NH₃ = 14 + (3×1)

= 14 + 3

= 17 g/mol

Mass of NH₃ =?

Mass = mole × molar mass

Mass of NH₃ = 2.5 × 17

Mass of NH₃ = 42.5 g

3. Determination of the number of mole of Ca(NO₃)₂.

Mass of Ca(NO₃)₂ = 100 g

Molar mass of Ca(NO₃)₂ = 40 + 2[14 + (3×16)]

= 40 + 2[14 + 48]

= 40 + 2[62]

= 40 + 124

= 164 g/mol

Mole of Ca(NO₃)₂ =?

Mole = mass /molar mass

Mole of Ca(NO₃)₂ = 100 / 164

Mole of Ca(NO₃)₂ = 0.61 mole

Answer:

The order and arrangement of the planets and other bodies in our solar system is due to the way the solar system formed. Nearest the Sun, only rocky material could withstand the heat when the solar system was young. For this reason, the first four planets—Mercury, Venus, Earth and Mars—are terrestrial planets.

Explanation:

Answer

The rate increases to eight times the original rate.

Explanation

When the concentration of each reaction is doubled, the rate increases by eighth compared to the initial rate.

Example: Rate =k[A][B]^2

Lets assume : [A]1 = 0.1 and [A]2 = 0.2

[B]1 = 0.2 and [B]2 = 0.4

Initially: Rate = (0.1)(0.2)^2 = 4x10^-3

After doubling: Rate = (0.2)(0.4)^2 = 0.032

Divide the final answer by the initial one

=> 0.032/4x10^-3 = 8

Answer:

you have to decide 865,000 with 1000 and the answer is 865

Monomer liquid and polymer powder are each poured into a special holder called a(n) flask.

A flask is a special container used in dentistry to hold the liquid monomer and polymer powder during the process of making a dental prosthesis. This process is called denture fabrication or denture processing. The monomer liquid and polymer powder are mixed together in the flask, which is then placed in a pressure cooker called an autoclave. The heat and pressure from the autoclave cause the monomer and polymer to polymerize, or harden, into a solid form. Once the denture is processed, it can be removed from the flask and finished and polished to a high shine.

Learn more about denture fabricationhere:

brainly.com/question/14315176

#SPJ11

An increase in pressure is converted into heat and work, explains the flow of energy in an internal combustion engine. Gasoline is ignited and consumed within an internal combustion engine (ICE) by the engine itself.

The engine then partially transforms the energy from combustion into work. The engine is composed of a fixed cylinder and a rotating piston. There are three main types of internal combustion engines in use today: the spark ignition engine, which is mainly used in automobiles; the diesel engine, which is used in heavy machinery and industrial systems and has an advantage over the more compact and lighter ones due to improvements in cycle efficiency.

To learn more about engine, click here.

https://brainly.com/question/19117846

#SPJ1

Answer:

Dalton used creativity to modify Proust's experiment and interpret the results. Millikan used creativity to develop a way to measure the charge on an electron. Thomson used creativity to interpret the results of the cathode ray tube experiment.

Explanation:

Creativity enables scientists to devise new ways of solving old problems.

I do not know what your material contains, however, creativity is key in scientific investigation. The term "science" is coined from the Latin word "scientia" which means knowledge.

In science, we endeavor to create new knowledge through research and innovation. This requires that a scientist must think of new and efficient ways of solving old problems. This underscores the centrality of creativity in scientific investigation.

Learn more: https://brainly.com/question/12108425

Answer:

Ore

hope this helps

thanks for the points

The value of Ka2 for the diprotic acid is 5.01 x 10^-4.

To find the value of ka2, we first need to understand what is happening at the half-equivalence points. At the first half-equivalence point, half of the diprotic acid has been neutralized by the strong base, meaning that one proton has been removed. This leaves us with the conjugate base of the acid, which is a weak base that will react with water to form hydroxide ions (OH-).

The equation for this reaction is:

HA- + H2O ⇌ H3O+ + A-

We know that at the half-equivalence point, the concentration of HA- and A- are equal, so we can use the Henderson-Hasselbalch equation to find the pH:

pH = pKa2 + log([A-]/[HA-])

We are given the pH (3.27) and we can assume that the pKa1 of the diprotic acid is much lower than 3.27 (since it has already been neutralized by the strong base), so we can use the Ka1 expression to find the concentration of A-:

Ka1 = [H3O+][A-]/[HA-]

Since we know that [HA-] = [A-] at the half-equivalence point, we can simplify this expression to:

Ka1 = [H3O+]

We can solve for [H3O+] by taking the negative logarithm of the pH:

[H3O+] = 10^-pH = 10^-3.27 = 5.01 x 10^-4

Now we can use the Henderson-Hasselbalch equation to find the pKa2:

3.27 = pKa2 + log([A-]/[HA-])

3.27 = pKa2 + log(1)

3.27 = pKa2

So the pKa2 of the diprotic acid is 3.27. To find the Ka2, we need to take the antilogarithm (or inverse logarithm) of this value:

Ka2 = 10^-pKa2 = 10^-3.27 = 5.01 x 10^-4

Therefore, the value of Ka2 for the diprotic acid is 5.01 x 10^-4.

Learn more about diprotic acid here,

https://brainly.com/question/13265808

#SPJ11

Answer:

decomposition is the correct answer

The charge of the gold ion in AuS₂ is +4.

The charge of the gold in AuS₂ can be determined by balancing the charges of the individual components. In this case, the sulfide (S) ion has a charge of -2, and there are two sulfide ions in AuS₂, so the total charge from the sulfide ions is -4. To balance this charge, the gold ion must have a charge of +4.

Therefore, the charge of the gold ion in AuS₂ is +4. This information can be used to write the balanced chemical equation for the formation of AuS₂, which would be represented as:

Au⁺⁴ + 2S⁻² → AuS₂

This equation shows that two sulfide ions with a charge of -2 are combining with a single gold ion with a charge of +4 to form the compound AuS₂.

Learn more on ionic charge here: https://brainly.com/question/22530066

#SPJ1

Answer:

D.

Explanation:

Answer:

38.7 g

Explanation:

First we convert 27.3 grams of C₈H₁₈ into moles, using the given molar mass:

Then we convert 0.239 moles of C₈H₁₈ into moles of H₂O, using the stoichiometric coefficients of the reaction:

Finally we convert 2.151 moles of H₂O into grams, using water's molar mass:

Answer:

D

Explanation:

The correct thing to do in this case would be to repeat the experiment.

The scientist would need to repeat the experiment in order to double-check the accuracy. If the accuracy is indeed doubtful, he/she can be able to trace the source of the error by repeating the experiment.

The correct option is D.

To predict the change in enthalpy due to the combustion of propane, we need to use the given molar enthalpy of combustion and convert the mass of propane to moles.

Given:

Mass of propane = 10 g

Molar enthalpy of combustion of propane = -2043.9 kJ/mol

To calculate the moles of propane:

Molar mass of propane (C3H8) = 3 * 12.01 g/mol (3 carbon atoms) + 8 * 1.01 g/mol (8 hydrogen atoms)

Molar mass of propane = 44.11 g/mol

Number of moles of propane = Mass of propane / Molar mass of propane

Number of moles of propane = 10 g / 44.11 g/mol

Number of moles of propane ≈ 0.226 mol

Now, we can calculate the change in enthalpy using the moles of propane:

Change in enthalpy = Number of moles of propane * Molar enthalpy of combustion of propane

Change in enthalpy = 0.226 mol * -2043.9 kJ/mol

Change in enthalpy ≈ -462.19 kJ

Therefore, the change in enthalpy due to the combustion of 10 g of propane is approximately -462.19 kJ. The negative sign indicates an exothermic reaction, meaning that heat is released during the combustion process.

Learn more about enthalpy of combustion here:

https://brainly.com/question/31845537

#SPJ11

Answer:

It would transform the nitrogen atom to a carbon atom

Explanation:

Answer:

8.09 moles of ethane

Explanation:

To calculate the number of moles of ethane, we need to use Avogadro's number, which is 6.022 x 10^23 molecules per mole. We can use this to convert the given number of molecules into moles.

Number of moles = Number of molecules / Avogadro's number

Number of moles of ethane = 4.87 x 10^24 / 6.022 x 10^23

Number of moles of ethane = 8.09 moles (rounded to two decimal places)

Thus, 8.09 moles of ethane contain 4.87x10^24 molecules of ethane.

These currents are primarily created by a highly hot substance found in the deepest section of the mantle, which rises, cools, and descends repeatedly, repeating the heating and rising process.

Differential heating leads to convection currents. Warm, less dense, lighter material rises while cool, more dense, heavier material sinks. Convection currents are patterns of circulation that are produced by this movement in the Earth's mantle, oceans, and atmosphere.

Convection currents are created by the intense heat and pressure that exists within the earth.

To know more about hot substance visit:-

brainly.com/question/29031056

#SPJ1

Answer:

The correct answer would be - D. What causes cancer cells to grow uncontrollably?

Explanation:

A Biologist is a person that studies living organisms and the study of living organisms and their process called biology. Biology is a very vast field that involves many branches such as zoology, botany, biochemistry, immunology, biophysics, anatomy, ecology and many more.

So, given all are can be an example of the study biology wanted to do, however, the question most likely studied by a biologist would be What causes cancer cells to grow uncontrollably as it deals with an organism and their biological process.

Answer:

this is the result

Explanation:

36.0

BE=4

36.0÷4

= 9

If the discount rate is 15%, Alternative 1 is the better choice from a financial perspective.

To suggest a choice between the two alternatives using Bic Analysis, we need to calculate the net present value (NPV) and the internal rate of return (IRR) for each alternative.

Alternative 1:
First cost (BU): $500
Annual Revenue: $1,600
Annual Expense: $400
Salvage: $6,000
Useful life: 8 years

Alternative 2:
First cost (BU): $900
Annual Revenue: $1,200
Annual Expense: $800
Salvage: $6,000
Useful life: 10 years

1. Calculate the Net Present Value (NPV) for each alternative. NPV takes into account the time value of money by discounting future cash flows to their present value using a specified rate of return (i). Let's assume the discount rate (i) is 15%.

Alternative 1 NPV:
NPV = -BU + (Annual Revenue - Annual Expense) * (1 - (1 + i)^(-Useful life)) / i + Salvage / (1 + i)^Useful life
NPV = -$500 + ($1,600 - $400) * (1 - (1 + 0.15)^(-8)) / 0.15 + $6,000 / (1 + 0.15)^8

Alternative 2 NPV:
NPV = -BU + (Annual Revenue - Annual Expense) * (1 - (1 + i)^(-Useful life)) / i + Salvage / (1 + i)^Useful life
NPV = -$900 + ($1,200 - $800) * (1 - (1 + 0.15)^(-10)) / 0.15 + $6,000 / (1 + 0.15)^10

2. Calculate the Internal Rate of Return (IRR) for each alternative. IRR is the discount rate that makes the NPV of an investment equal to zero.

Alternative 1 IRR:
Set NPV = 0 and solve for i.
NPV = -$500 + ($1,600 - $400) * (1 - (1 + i)^(-8)) / i + $6,000 / (1 + i)^8 = 0

Alternative 2 IRR:
Set NPV = 0 and solve for i.
NPV = -$900 + ($1,200 - $800) * (1 - (1 + i)^(-10)) / i + $6,000 / (1 + i)^10 = 0

3. Compare the NPV and IRR results for each alternative.

- If the NPV is positive and the IRR is greater than the discount rate (15%), then Alternative 1 is a better choice.
- If the NPV is positive and the IRR is greater than the discount rate (15%), then Alternative 2 is a better choice.
- If both alternatives have negative NPV or IRR less than the discount rate (15%), neither alternative is recommended.

By calculating the NPV and IRR for each alternative using the provided values, you can determine which alternative is more financially viable based on the given discount rate.

Learn more about discount rate here :-

https://brainly.com/question/13660799

#SPJ11

In 2CaCO3 there are 3 elements

I hope that helped you! If you have any further questions comment down below or message me! Good luck!