When Justin added deionized water to the volumetric flask, he accidentally filled the flask so that the water level was slightly above the mark. He still assumed that the flask was holding 100.0 mL when he calculated the density of the solution, however. How will this procedural error affect his calculated density value

Answer:

8.14 mL of NaOH are required to reach the equivalence point.

Explanation:

Formula for titration is

mmoles of base = mmoles of acid.

Equality is fullfilled at the equivalence point.

M of acid . volume of acid = M of base . volume of base

Let's replace with data given:

11.5 mL . 0.162M = 0.229 M . volume of base

Volume of base = (11.5 mL . 0.162M ) / 0.229M

Volume of base = 8.14 mL

8.14 mL of NaOH are required to reach the equivalence point.

Answer:

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Answer:

For each of the salts on the left, match the salts on the right that can be compared directly, using Ksp values, to estimate solubilities. (If more than one salt on the right can be directly compared, include all the relevant salts by writing your answer as a string of characters without punctuation, e.g, ABC.) fill in the blank 1 1. manganese(II) sulfide A. CuS fill in the blank 2 2. calcium fluoride B. FeS C. PbCl2 D. CaCrO4 Write the expression for K in terms of the solubility, s, for each salt, when dissolved in water. manganese(II) sulfide calcium fluoride Ksp

Answer:

1.47 atm

Explanation:

Step 1: Calculate the moles corresponding to 41.6 g of oxygen

The molar mass of oxygen is 32.00 g/mol.

41.6 g × 1 mol/32.00 g = 1.30 mol

Step 2: Convert 30.0 °C to Kelvin

We will use the following expression.

K = °C + 273.15 = 30.0 + 273.15 = 303.2 K

Step 3: Calculate the pressure exerted by the oxygen

We will use the ideal gas equation.

P × V = n × R × T

P = n × R × T / V

P = 1.30 mol × (0.0821 atm.L/mol.L) × 303.2 K / 22.0 L = 1.47 atm

Answer:

[tex]2KCl + Zn {}^{2 + } → 2K {}^{ + } + ZnCl _{2} \\ molecular \: mass \: of \: zinc \: chloride = 65 + (35.5 \times 2) = 136 \: g \\ molecular \: mass \: of \: potassium \: chloride = 39 + 35.5 = 74.5 \: g

(a) shows both acidic and basic properties

(b) creates a neutral pH in solution

(c) is an ionic compound formed from an acid-base reaction

(d) can react with acid but not with a base

Answer:

Fe2O3 is the formula this is your correct answer

Answer:

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Answer:

E = (50.0 kg)(3.00 x 108 m/s)2

Explanation:

Answer:

D. The rate decreases as reactants are used up.

Explanation:

Initially, the rate increases until the reaction is at equilibrium. At equilibrium, the rate is constant.

As the reaction progresses, the rate decreases to zero when reactants are used up ( for irriversible reactions only )

Explanation:

holes are left due to space left out the migrating electrons. they are positive charge carriers. if the electron moves in one direction, the holes appear to move in the opposite direction.

Answer:For the 1st box it starts with 250 and for the 2nd box it starts with CO(2).

Explanation:

Answer:

1

Explanation:

Answer:

please correct it, the question is incomplete

Answer:

Conversely, during our winter months when the Northern Hemisphere is tilted away from the sun, it is summer in the Southern Hemisphere. During the summer, the land, oceans, and atmosphere in the Northern Hemisphere receive more direct rays of sunlight.

Explanation:

Answer:

neither of them plays cricket,does anyone?

Explanation:

I know you will think I its weird but it is the rule of grammar and 100% correct!

Answer:

neither of them plays cricket, do you?​

Explanation:

Answer:

NASA stands for National Aeronautics and Space Administration

Answer:

National Aeronautics and Space Administration

hope this will help you more

Answer: The empirical formula of the compound is [tex]KMnO_4[/tex]

Explanation:

The empirical formula is the chemical formula of the simplest ratio of the number of atoms of each element present in a compound.

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)

Let the mass of the compound be 100 g

Given values:

% of K = 24.7%

% of Mn = 34.76%

% of O = 40.50%

Mass of K = 24.7 g

Mass of Mn = 34.76 g

Mass of O = 40.50 g

To calculate the empirical formula of a compound, few steps need to be followed:

We know:

Molar mass of K = 39.10 g/mol

Molar mass of Mn = 54.94 g/mol

Molar mass of O = 16 g/mol

Putting values in equation 1, we get:

[tex]\text{Moles of K}=\frac{24.7g}{39.10g/mol}=0.632 mol[/tex]

[tex]\text{Moles of Mn}=\frac{34.76g}{54.94g/mol}=0.633 mol[/tex]

[tex]\text{Moles of O}=\frac{40.50g}{16g/mol}=2.53 mol[/tex]

[tex]\text{Mole fraction of K}=\frac{0.632}{0.632}=1[/tex]

[tex]\text{Mole fraction of Mn}=\frac{0.633}{0.632}=1[/tex]

[tex]\text{Mole fraction of O}=\frac{2.53}{0.632}=4[/tex]

The empirical formula of the compound becomes [tex]K_1Mn_1O_4=KMnO_4[/tex]

Hence, the empirical formula of the compound is [tex]KMnO_4[/tex]

The empirical formula of the compound is KMnO₄

Divide by their molar mass

K = 24.74 / 39 = 0.634

Mn = 34.76 / 55 = 0.632

O = 40.50 / 16 = 2.531

Divide by the smallest

K = 0.634 / 0.632 = 1

Mn = 0.632 / 0.632 = 1

O = 2.531 / 0.632 = 4

Therefore, the empirical formula of the compound is KMnO₄

Learn more about empirical formula:

https://brainly.com/question/24297883

Answer:

I think u willl get the answer fast in......

Answer:

this is because when a salt dissolves, its dissociated ions can move freely in solution, allowing a charge to flow. The resulting solution will conduct electricity because it contains ions.

Explanation:

Answer:

D. Van der Waals forces are the strongest force between H2

molecules and between NH3 molecules.  

Explanation:

Van der Waal’s forces are the forces which arises due to disturbance in the electron density of the molecule.  

These are usually found in non polar molecules. Hence N2 is said to exhibit this force.

Out of these Van der Waals is the weakest force.

Answer:

11.

O4 means 4 atoms of oxygen. H2O

has one atom of oxygen, so seven "units" of

H2O has 7.

Answer:

There is no unit for Kc

Explanation:

Answer:

C - N Bond formation.

Explanation:

Imide synthesis is a chemical reaction in organic chemistry which consists of two acyl groups which bond to nitrogen atom. The compound structure is related to acid anhydrides. Imides are monoacyl which are used as valuable intermediates in organic synthesis.

Answer:

a): The name of the product nuclide is lead-214

b): The symbol of the product nuclide is Pb-218

Explanation:

There are three types of decay processes:

Alpha decay is the decay process that happens when a heavy nucleus decays into a light nucleus with the release of an alpha particle. This alpha particle carries a charge of +2 units and has a mass of 4 units. It is also known as the helium nucleus. The general equation for this decay process is:

[tex]_Z^A\textrm{X} → _{Z-2}^{A-4}\textrm{Y}+_2^4\alpha[/tex]

The nuclear equation for the alpha decay of Po-218 follows:

[tex]_{84}^{218}\textrm{Po}\rightarrow _{82}^{214}\textrm{Pb}+_2^4\alpha[/tex]

Hence, the name of the product nuclide is lead-214 and the symbol is Pb-218.

Answer: The empirical and molecular formula for the given organic compound are [tex]CH[/tex] and [tex]C_2H_2[/tex] respectively.

Explanation:

The empirical formula is the chemical formula of the simplest ratio of the number of atoms of each element present in a compound.

The chemical equation for the combustion of hydrocarbon having carbon and hydrogen follows:

[tex]C_xH_y+O_2\rightarrow CO_2+H_2O[/tex]

where, 'x' and 'y' are the subscripts of carbon and hydrogen respectively.

We are given:

Mass of [tex]CO_2[/tex] = 9.920 g

Mass of [tex]H_2O[/tex] = 2.031 g

In 44 g of carbon dioxide, 12 g of carbon is contained.

So, in 9.920 g of carbon dioxide, [tex]=\frac{12}{44}\times 9.920g=2.705g[/tex] of carbon will be contained.

In 18g of water, 2 g of hydrogen is contained.

So, in 2.031 g of water, [tex]=\frac{2}{18}\times 2.031g=0.226g[/tex] of hydrogen will be contained.

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)

To formulate the empirical formula, we need to follow some steps:

Molar mass of C = 12 g/mol

Molar mass of H = 1 g/mol

Putting values in equation 1, we get:

[tex]\text{Moles of C}=\frac{2.705g}{12g/mol}=0.225 mol[/tex]

[tex]\text{Moles of H}=\frac{0.226g}{1g/mol}=0.226 mol[/tex]

Calculating the mole fraction of each element by dividing the calculated moles by the least calculated number of moles that is 0.225 moles

[tex]\text{Mole fraction of C}=\frac{0.224}{0.225}=1[/tex]

[tex]\text{Mole fraction of H}=\frac{0.226}{0.225}=1[/tex]

The ratio of C : H = 1 : 1

The empirical formula of the compound becomes [tex]K_1Mn_1O_4=KMnO_4[/tex]

To calculate the molecular formula, the number of atoms of the empirical formula is multiplied by a factor known as valency that is represented by the symbol, 'n'.

[tex]n =\frac{\text{Molecular mass}}{\text{Empirical mass}}[/tex]        .....(2)

We are given:  

Mass of molecular formula = 26.04 g/mol

Mass of empirical formula = 13 g/mol

Putting values in equation 3, we get:

[tex]n=\frac{26.04g/mol}{13g/mol}=2[/tex]

Multiplying this valency by the subscript of every element of empirical formula, we get:

[tex]C_{1\times 2}H_{1\times 2}=C_2H_2[/tex]

Hence, the empirical and molecular formula for the given organic compound are [tex]CH[/tex] and [tex]C_2H_2[/tex] respectively.

Answer:

C. a mountain peak

Explanation:

Boiling occurs when vapour pressure equals atmospheric pressure.  The vapour pressure is the pressure used by the gas leaving the pot and those returning. For boiling to occur, the vapour pressure must pass the atmospheric pressure around.  At sea level, the atmospheric pressure is very high. With altitude, the air becomes thinner and atmospheric pressure becomes lower. With increasing altitude, the low atmospheric pressure makes the boiling point lower as a result of the decreasing pressure on the vapour.  The boiling point can then easily be reached at higher altitudes. Therefore, a mountain peak has atmospheric conditions that produce the lowest boiling point for water as it has a higher altitude.

Answer:

The sideways movement occurs because the maximum velocity of the stream shifts toward the outside of the bend, causing erosion of the outer bank. At the same time the reduced current at the inside of the meander results in the deposition of coarse sediment, especially sand