Which level below contains the most limited number of organisms?


Genus


Order


Phylum


Kingdom

Answer:

Explanation:

The following equation describes the oxidation of ethanol to aceticacid by potassium permanganate:

3C2H5OH +4KMnO4-->3HC2H3O2 +4MnO2 + 4KOH + H2O

5.0 g of ethanol and an excess of aqueous KMnO4 arereacted, and 5.9 g HC2H3O2 result.What is the percent yield?

a. 100%

b. 91%

c. 67%

d. 30%

e. 5.9 g HC2H3O2 is impossible since it represcents more than a100% yield.

The percent yield of acetic acid is 91.9%

From the question,

We are to determine the percent yield of the acetic acid

To determine the percent yield of the acetic acid, we will calculate the theoretical yield first.

The balanced chemical equation for the reaction is

3C₂H₅OH + 4KMnO₄ → 3HC₂H₃O₂ + 4MnO₂ + 4KOH + H₂O

This means

3 moles of ethanol reacts with 4 moles of potassium permanganate to produce 3 moles of acetic acid

Now, we will determine the number of moles of ethanol that reacted

From the question

Mass of ethanol that reacted = 5.00 g

Molar mass of ethanol = 46.07 g/mol

Using the formula

[tex]Number\ of\ moles= \frac{Mass}{Molar\ mass}[/tex]

∴ Number of moles of ethanol = [tex]\frac{5.00}{46.07}[/tex]

Number of moles of ethanol that reacted = 0.10853 mole

Now,

From the balanced chemical equation,

3 moles of ethanol reacts with 4 moles of potassium permanganate to produce 3 moles of acetic acid

Then,

0.10853 mole of ethanol reacts with the excess potassium permanganate to produce 0.10853 mole of acetic acid

∴ 0.10853 mole of acetic acid will be produced

Now, for the mass of acetic acid that would be produced

From the formula

Mass = Number of moles × Molar mass

From the question

Molar mass of acetic acid = 60.05 g/mol

∴ Mass of acetic acid that will be produced = 0.10853 × 60.05

Mass of acetic acid that will be produced = 6.5172 g

This is the theoretical yield of acetic acid

Now, for the percent yield

[tex]Percent\ yield = \frac{Actual\ yield}{Theoretical\ yield} \times 100\%[/tex]

From the question,

Actual yield = 5.99 g

∴ [tex]Percent\ yield = \frac{5.99}{6.5172} \times 100\%[/tex]

[tex]Percent\ yield = \frac{599}{6.5172} \%[/tex]

Percent yield = 91.9106 %

Percent yield ≅ 91.9%

Hence, the percent yield of acetic acid is 91.9%

Learn more here: https://brainly.com/question/19655772

Answer:

the natural and man made thing which we can see around us is known as environment. not enviorement.

Answer:

Environment means anything that surrounds us. It can be living (biotic) or non-living (abiotic) things. It includes physical, chemical and other natural forces. ... In the environment there are different interactions between animals, plants, soil, water, and other living and non-living things.

Answer:

a

Explanation:

It increases the reaction rate by lowering the activation energy for a reaction

Answer:

24.47 L

Explanation:

Using the general gas law equation:

PV = nRT

Where;

P = pressure (atm)

V = volume (L)

n = number of moles (mol)

R = 0.0821 Latm/molK

T = temperature (K)

According to the provided information in this question,

P = 1.0 atm

V = ?

n = 1 mol

T = 25°C = 25 + 273 = 298K

Using PV = nRT

V = nRT ÷ P

V = 1 × 0.0821 × 298 ÷ 1

V = 24.465 ÷ 1

V = 24.465

V = 24.47 L

Answer:

C

Explanation:

Alcoholism is the inability to control drinking due to both a physical and emotional dependence on alcohol.

Answer:is D.the wave theory of light

Explanation:

cuz i got it wrong :( but the answer is correct :3

Answer:

D) wave theory of light

Explanation:

Answer:

H2O + SO3 → H2SO4

this is the answer for

this question

Answer:

0.0389757845886336

Explanation:

Answer:

It's A because its almost like a personality its just a sexuallity / gender

Answer:

half of its genetic material from each parent.

Explanation:

Answer:

milk sugar, salts, substances with fatlike properties, and gases

Answer:

Boiling point, temperature at which the pressure exerted by the surroundings upon a liquid is equaled by the pressure exerted by the vapour of the liquid; under this condition, addition of heat results in the transformation of the liquid into its vapour without raising the temperature. Water at its boiling point.

Explanation:

g00gle worls

Answer:

The energy transferred is known as kinetic energy, and it depends on the mass and speed achieved.

This equation reveals that the kinetic energy of an object is directly proportional to the square of its speed.

KE = 0.5 • m • v2

where m = mass of object

v = speed of object

That means that for a twofold increase in speed, the kinetic energy will increase by a factor of four. For a threefold increase in speed, the kinetic energy will increase by a factor of nine.

Answer: Q=104525J

Explanation: where Q is the heat energy required to heat a mass, m , though a change in temperature of Δ T and c is the heat capacity of the material (found in books!). Typical units are Q in Joules or J , m in k g and Δ T is in either Kelvin, K , or degrees Celsius o C . The units of c depend on the other units used but J / k g o C is typical.

Answer:

ionic bond

Explanation:

Answer:

Mercury chloride's(HgCI2) empirical formula is HgCI.

Explanation:

Answer: An ion with fewer electrons than its neutral atom is called a(n) cation. The charge of an ion with more electrons than its neutral atom is. negative.Name an ionic compound by the cation followed by the anion. ... Covalent compounds are formed when two or more nonmetal atoms bond by sharing valence electrons. Valence electrons are the outermost electrons of an atom.

Explanation:

Answer:

v is the wave speed in metres per second, m/s. f is the frequency in hertz, Hz. λ (lambda) is the wavelength in metres

Answer:

Explanation:

Seismographs can detect quakes that are too small for humans to feel. During an earthquake, ground-shaking seismic waves radiate outward from the quake source, called the epicenter. Different types of seismic waves travel at different speeds and through different parts of the Earth during a quake.

Answer:

The correct option is 2) When electrons are shared unevenly among the atoms in a compound

Explanation:

Polarity is the property of a molecule in which the atoms share electrons in an uneven way. This is due to differences in the electronegativity of the atoms. The atom with a higher electronegativity will attract with a higher strength the electrons. Thus, a separation of charges is produced: the atom with more electrons has a more negative charge while the atom with fewer electrons has a more positive charge. This charge separation generates a dipolar moment, which means: polarity.

Answer:

D because it is in a fixed position

Answer:

Extract DNA from the fertilizer to identify its origin.

Explanation:

Barnes find out that fertilizer was used in the explosive material. Barnes should now identify the origin of this type of fertilizer so that its root can be determined. When the origin is unable to be determined then Barnes should keep the traces of the fertilizer and try to identify the manufacturer.

Answer:

Track down where the fertilizer was sold and who bought it

Explanation:

I, myself, took this exam.

Answer:

The first one

Explanation:

waves are created by friction between wind and water surface

Answer: i think is the first one i don’t rembember

Explanation: trust me

Answer:

2.9 * 10^23 atoms Au

Explanation:

(95 g Au) * (1 mol Au/196.96657) * (6.02 * 10^23 atoms Au / 1 Mol Au)

2.9 * 10^23 atoms Au

Answer:

that pdf looks sus

Explanation:

Explanation:

Answer:

well it depends are they carnivors or eating soup or are they sucking on co2

Explanation:

all of them have a good day

Answer: the answer is selecting all three ( solids, liquids, gasses) (elements, compounds, and mixtures) (living things, and nonlinear things)

Explanation: I got it right:)

Answer:

I do not understand.

Explanation:

What do you mean by that?

Yes I know science but why are you asking a question like this?

Explanation:

cells, dna, chromosomes, body systems