1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Anna [14]
3 years ago
8

Which statement most completely describes the role of the cell in a single-called organism? A.) provides the chemical functionin

g and genetic material that enables life, growth, and reproduction. B.) they provide organism with nutrition and a means of loco motion. C.) provides a boundary between organism and its environment. D.) provides support structure that organism lacks because it has no true skeleton.
Chemistry
1 answer:
Eva8 [605]3 years ago
7 0
The correct answer is A
You might be interested in
If 21.42g of KMnO4 is actually produced what is the percent yield
mrs_skeptik [129]

Answer:

Percentage yield  = 6.776%

Explanation:

Data Given:

Actual yield of KMnO₄ = 21.42g

Percentage Yield = ?

Formula Used to find Percent yield

                 Percentage yield = Actual yield/ theoretical yield x 100        (1)

For this Pupose First step is

We have to know the theoretical yield KMnO₄

Potasium permagnate form from MnO₄ and KOH in the presence of Oxygen by heating, in 1st step in second 2K₂MnO₄ react with HCl and give KMnO₄ .

The Reactions of formation of KMnO₄

1st Step                      

2MnO₄ + 4KOH + O₂  ------------> 2K₂MnO₄ + 2H₂O

2nd Step

2K₂MnO₄ + 4HCl ------------->2 KMnO₄ + H₂O + 4KCl

So form the above equation we come to know it produced 2 Mole of KMnO₄

Now we will calculate the mass of KMnO₄ by mass formulae

     mass of KMnO₄ = Number of mole of KMnO₄ x Molar Mass of KMnO₄

Molar Mass of KMnO₄ = 158.034g /mol

Put value in Mass Formula

 mass of KMnO₄ = 2 mol x  158.034g/mol

mass of KMnO₄ = 316.1 g

So the theoratical yield per standard reaction = 316.1 g

Now put all values in equation 1

           Percentage yield = Actual yield/ theoretical yield x 100  

           Percentage yield  = 21.42g / 316.1 g x 100

          Percentage yield =  0.0678 x 100

          Percentage yield  = 6.776%

4 0
3 years ago
Polymerization and the break down of a polymer are two opposite reactions. What role does a water molecule play in both of them?
n200080 [17]
Well in polymerization or in dehydration synthesis, the individual monomer molecules contain either H or OH attached to the end of their respective molecules. When they chemically compline together both the H and OH come off or break from their respective molecules and form water as a product. In place, a covalent bond is produced connecting the monomers together. In break down of polymers, with Water, the water molecule essentially disconnects the large molecule at the same place where it would have formed a covalent bond, and causes one of the monomers to bond to either a H and or OH. Separating the 2 compounds.
3 0
3 years ago
The equation for photon energy, E, is E=hcλ where h = 6.626×10−34 J⋅s (Planck's constant) and c = 2.99×108 m/s (the speed of lig
masya89 [10]

Answer:

9.133×10^-6 m

Explanation:

A photon is the smallest discrete amount or quantum of electromagnetic radiation. It is the basic unit of all light. Photons are always in motion and, in a vacuum, travel at a constant speed to all observers of 3 x 10^8 m/s.

From the question, the following details were supplied;

Energy of the photon (E) = 4.61×10^−19 J

Speed of light (c) = 2.99×10^8 m/s

Plank's constant (h) = 6.626×10^−34 J⋅s

Wavelength of the photon (λ)= ??? The unknown

From

E=hc/λ

λ= hc/E

Substituting values

λ= 6.626×10^−34 × 2.99×10^8/ 4.61×10^−19

λ= 91.33×10^-7 m

λ= 9.133×10^-6 m

3 0
3 years ago
I need help on the chemistry question
yan [13]

Answer:

polar solvents can dissolve polar solutes

6 0
2 years ago
How did the scientific method change the way scientists worked beginning in
earnstyle [38]

Answer:

A). It encouraged them to rely on observation and experimentation to support their conclusions.

Explanation:

3 0
4 years ago
Other questions:
  • Negatively charged particles within the atom are called what?
    15·1 answer
  • What is sodium mixed with carbon dioxide
    11·1 answer
  • Water is being pumped from the bottom of a well 150 feet deep at a rate of 200 gal/hour into a vented storage tank 30 feet above
    7·1 answer
  • Osmium: atomic number
    11·1 answer
  • A solution of KOH has a [OH-] concentration of 0.045 M. What is the pOH of the solution? *
    10·2 answers
  • Which structure is responsible for bringing in the amino acids? (Points : 1)
    12·2 answers
  • A pencil sharpener has a handle with a radius of 1.5 cm. The sharpening mechanism has a radius of 0.5 cm. What is the IMA of the
    5·2 answers
  • True or false : rocks have different properties such as hardness and texture
    12·2 answers
  • When two chlorine atoms (Cl) join to form chlorine gas, Cl2, A. one chlorine atom transfers an electron to the other chlorine at
    15·1 answer
  • How should you prepare a buret for titration before loading it with titrant?.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!