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Concentration of vinegar sample of 28mL which requires 21. 5 ml of 0.550 M NaOH to reach the endpoint in a titration is 0.42M.

Concentration of vinegar in the titration method will be used by using the below equation:

M₁V₁ = M₂V₂,

By putting values on above equation from the question, we get

M₂ = (0.55M)(21.5mL) / (28mL) = 0.42 M

Hence, required concentration of vinegar is 0.42M.

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Answer:

Here is the solution..Hope it helps:)

Answer:

5 is the first answer and 28,650 for second

Answer: 2) 2HCl(sq) + CaCO3(s) CaCl2(sq) + CO2(g) + H2O (l) No of moles of CaCO3 = amount of the CaCO3 (g)/mw of CaCO3 (g/mole)= 0.8085 g/100 g/mole = 0.008085

Explanation:

Answer:

c

Explanation:

got it right on my test

Answer:

The answer is: C aka covalent bond

Explanation:

Happy to help

Explanation:

Global warming indeed is a big problem to us. But not only us, it is a big problem to all living things on the Earth. Global warming as everyone knows is a topic that has been with us for a long time. Global warming happens in multiple ways like deforestation, due to harmful gases (Like carbon doxide) and etc... Global warming simple means that our Globe is warming or is heating up. This is a big problem to all living things on Earth.

It is a big problem to us because increase in temperature throughout the globe and due to this Ice in the Antarctic and the Arctic is melting and is causing damage to habitat of animals and also this is causing the sea level to rise and also this is wasting drinking water that us humans have. So this is clearly a problem to all.

But there is good news that now because people are now starting to care for the planet by reducing the amount of harmful gases released to the environment and also starting Reforestation programs.

So In my opinion Global warming is a big problem to all living things on Earth.

Answer:

148.8 ml

Explanation:

V1/T1 = V2/T2

T2 * V1/T1  = V2      (T must be in K units)

(118 + 273.15) * 126 /(58 + 273.15) = 148.8 ml

The amount of Neon gas with the given volume and at the given temperature and pressure is 0.21 mol.

Option C) 0.21 mol is the correct answer.

The Ideal gas law or general gas equation emphasizes on the state or behavior of a hypothetical ideal gas. It states that "the pressure multiplied by volume is equal to moles multiply by the universal gas constant multiply by temperature.

It is expressed as;

PV = nRT

Where P is pressure, V is volume, n is the amount of substance, T is temperature and R is the ideal gas constant ( 0.08206 Latm/molK )

Given that;

PV = nRT

n = PV / RT

n = ( 4.6atm × 0.84L ) / ( 0.0821 Latm/molK × 222K )

n = ( 3.864Latm ) / ( 18.2262Latm/mol )

n = 0.21 mol

Therefore, the amount of Neon gas with the given volume and at the given temperature and pressure is 0.21 mol.

Option C) 0.21 mol is the correct answer.

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Answer:

Experiment, analysis, research, purpose, hypothesis and conclusion.

Answer:

Neutron

Explanation:

Answer: The limiting reactant will be used up first, meaning the reaction can no longer occur with only the excess reactant.

Explanation:

In a reaction the reactant which determines the yield of the reaction is called limiting reactant. Whereas, the reactant which is excess in amount does not itself lead the reaction after the limiting reactant is consumed.

In a reaction, the yield of the product depends on the number of moles of reactants. The reactants which is not sufficient in amount is determining the yield because as soon as this reactant is consumed, the production stopes.

The excess reactant on the other hand is excess in amount which can't lead the reaction alone after the consumption of the limiting reactant. Hence, we don't have to worry on the excess reactant.

The limiting reactant of a reaction can be determined  by calculating the number of moles of each reactants participating in it.

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The number of half-lives that has elapsed since the sample originally formed is 3 half-lives

Original amount (N₀) = 15.4 + 2.2 = 17.6 g

Amount remaining (N) = 2.2 g

Number of half-lives (n) = ?

2ⁿ = N₀ / N

2ⁿ = 17.6 / 2.2

2ⁿ = 8

2ⁿ = 2³

n = 3

Thus, 3 half-lives has elapsed

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Answer:

3

Explanation:

e2022

pH is the concentration of the hydrogen ion in the solution. The value of Ka for hydrogen fluoride is 2.7688.

pH is the potential of the hydrogen or the hydronium ion in the solution that depicts the acidic or the basic character of the solution.

Given,

pH = 2.3

Concentration of hydrogen fluoride = 0.25 M

The concentration of hydrogen ion is calculated as:

[tex]\begin{aligned} \rm pH & = \rm - log [H^{+}]\\\\2.3 &= \rm - log [H^{+}]\\\\&= 0.832\;\rm M\end{aligned}[/tex]

Ka is calculated as:

[tex]\begin{aligned} \rm Ka &= \rm \dfrac{[H^{+}]F^{-}]}{[HF]}\\\\&= \dfrac{0.832 \times 0.832}{0.25}\\\\&= 2.7688\end{aligned}[/tex]

Therefore, 2.7688 is the Ka for hydrogen fluoride.

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Answer:

Same amoung of electrons in their outer shell

Explanation:

elements in the same group have the same number of electrons in their outer shell this is why they are in the same group

The elements of a group have the same number of valence electrons in their outermost shell.

The chemical properties of elements are described by the number of valence electrons in their outermost shell. The chemical elements placed in the same group have the same number of valence electrons in their valence shell. Therefore, the chemical elements placed in the same group of the periodic table have similar chemical behavior.

The elements having identical valence electronic configurations in their atoms are arranged in the same group of the modern periodic table. These valence electrons are accountable for the chemical properties and reactivities of the elements.

For example, the chemical properties of all elements in group 1 are similar as they have only one electron in their valence shell. The chemical elements of group 17 have seven electrons in their valence shell they are halogens with similar chemical behavior.

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Answer:

water acts as a solvent and dissolves the solute (salt) to produce a salt water solution

Explanation:

The pH of the solutions is 12.67.  

pH is the measurement of how acidic or basic a solution is. The range of pH values is from 0 to 14. Lower pH values mean higher acidity, while higher pH means higher basicity. If the pH value is equal to 7, then the solution is neutral.

To calculate the pH of the solution, a few approaches are possible. Here, the pOH of the solution is calculated first using the molar concentration of  [tex]OH^{-1}[/tex] ions. Because pH + pOH = 14, the pH of the solution can then be calculated by subtracting pOH from 14.

Because 2 moles of [tex]OH^{-1}[/tex] ions are formed per mole of [tex]Ca(OH)_{2}[/tex]dissolved, the pOH of a saturated [tex]Ca(OH)_{2}[/tex] solution at  [tex]20^{.C}[/tex] is,  

Concentration ([tex]C_{OH}[/tex]) of [tex]OH^{-1}[/tex] ions,

          [tex]C_{OH}[/tex]   = 0.02335 mol [tex]Ca(OH)_{2}[/tex]/L  X 2 mol [tex]OH^{-1}[/tex] /1 mol [tex]Ca(OH)_{2}[/tex]

            [tex]C_{OH}[/tex] = 0.0467 mol [tex]OH^{-1}[/tex]/L

*pOH of saturated [tex]Ca(OH)_{2}[/tex] solution,

                                   pOH = -log [[tex]C_{OH}[/tex]]

                                   pOH = -log [0.0467 mol [tex]OH^{-1}[/tex]/L ]            

                                  pOH = 1.33  

*pH of saturated [tex]Ca(OH)_{2}[/tex] solution,

                                   pH = 14 - 1.33

                                   pH = 12.67

Hence, the pH of the solutions is 12.67.

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option A Hydrogen will have the greatest rate of effusion beacuse it has the least mass among all

Answer:

9, 10, 12

Explanation:

anything greater than pH 7 is basic

Answer:

His gold foil experiment showed that the atom is mostly empty space with a tiny dense positively-charged nucleus. Based on those results, Rutherford was able to propose the nuclear model of the atom.

Answer:

3.2447

Explanation:

m1v1 = m2v2

Answer: 1

Explanation:

Heat is being released, so the energy of the reactants is less than the energy of the products.

Answer:

The position of the moon during its orbit around Earth

Answer:

the angle you look at it from

Answer:

Minerals can be identified by their color, luster, streak, cleavage, hardness, and even by their chemical composition. Using these properties is one way a Geologist defines and identifies what kind of mineral a specimen is.