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
tekilochka [14]
3 years ago
8

Biology

Chemistry
2 answers:
Brrunno [24]3 years ago
7 0

Anwser:

The correct option is A.

Explnation:

The dependent variable is the variable that is measured during the experiment, it is the  variable that is affected during the experiment. Experiments are design in such a way that the dependent variable depends on and respond to independent variable.

juin [17]3 years ago
3 0
The correct option is A.
The dependent variable is the variable that is measured during the experiment, it is the  variable that is affected during the experiment. Experiments are design in such a way that the dependent variable depends on and respond to independent variable.
You might be interested in
Farmers use conservation practices such as crop rotation to insure that their crops are sustainable. Crop rotation is the proces
jek_recluse [69]

Answer:

C.  If farmers do not use soil conservation practices, the topsoil, which contains humus, will not be fertile to promote plant growth because of the loss of nutrients from the soil.

Explanation:

The top soil is rich in humus and not weathered materials. It is not close to the bedrock. Rather, the topsoil is rich in organic matter and it is present as humus in the soil.

  • If crop rotation is not being practiced, the soil's nutrients would be highly depleted without replenishing them back.
  • With crop rotation the top soil can be made more fertile when it is left uncultivated for a period of time.
  • Instead of heavily relying on a single piece of land, crops can rotated on a timed basis so that soils will have enough time to restore their nutrients.
3 0
2 years ago
How does dermal tissue play a key role in transpiration?
weqwewe [10]

Answer:

Dermal tissue of the stems and leaves is covered by a waxy cuticle that prevents evaporative water loss. Stomata are specialized pores that allow gas exchange through holes in the cuticle. Unlike the stem and leaves, the root epidermis is not covered by a waxy cuticle which would prevent absorption of water.

Explanation:

5 0
3 years ago
Your task is to create a buffered solution. You are provided with 0.10 M solutions of formic acid and sodium formate. Formic aci
Anton [14]

Answer:

15.2mL of the 0.10M sodium formate solution and 4.8mL of the 0.10M formic acid solution.

Explanation:

To find the pH of a buffer based on the concentration of the acid and conjugate base we must use Henderson-Hasselbalch equation:

pH = pKa + log [A⁻] / [HA]

<em>Where [A⁻] could be taken as moles of the sodium formate and [HA] moles of the formic acid</em>

<em />

4.25 = 3.75 + log [A⁻] / [HA]

0.5 = log [A⁻] / [HA]

3.162 = [A⁻] / [HA] <em>(1)</em>

<em></em>

As both solutions are 0.10M and you want to create 20mL of the buffer, the moles are:

0.10M  * 20x10⁻³L =

2x10⁻³moles = [A⁻] + [HA] <em>(2)</em>

Replacing (2) in (1):

3.162 = 2x10⁻³moles - [HA] / [HA]

3.162 [HA] = 2x10⁻³moles - [HA]

4.162[HA] = 2x10⁻³moles

[HA] = 4.805x10⁻⁴ moles

[A⁻] = 2x10⁻³moles - 4.805x10⁻⁴ moles = 1.5195x10⁻³moles

That means, to create the buffer you must add:

[A⁻] = 1.5195x10⁻³moles * (1L / 0.10mol) = 0.0152L =

<h3>15.2mL of the 0.10M sodium formate solution</h3>

[HA] = 4.805x10⁻⁴ moles * (1L / 0.10mol) = 0.0048L =

<h3>4.8mL of the 0.10M formic acid solution</h3>
4 0
3 years ago
Ammonia and hydrogen fluoride both have unusually high boiling points due to
nexus9112 [7]

Answer:

C. hydrogen bonding

Explanation:

Ammonia and hydrogen fluoride are both able to exhibit hydrogen bonding due to containing nitrogen (in ammonia) and fluoride (obviously in hydrogen fluoride). Remember the unique qualities of NOF. :)

5 0
3 years ago
Taking your foot off of the gas pedal when you see a police car which of the Newton’s law
larisa [96]

Answer:

newton's third law of motion

Explanation:

it states about action and reaction when you see an action you take reaction like taking off your foot from the gas pedal

3 0
2 years ago
Other questions:
  • in terms of erosion, which letter displays the word meander? ( A.) W (B.) F ( C.) A ( D.) S
    12·1 answer
  • the tip of a match contains chemical energy. Kevin's father lit a match and blew out the flame. then he tried to light the same
    13·1 answer
  • What is the strongest type of intermolecular force present in nh2ch3?
    14·1 answer
  • What is the main source of energy in this forest ecosystem
    14·1 answer
  • What type of bonding occurs in a sample of pure cobalt, co? in other words, how is one cobalt atom held to another cobalt atom?
    7·1 answer
  • Covers top layer of leaf, is water-repellent and prevents water loss
    5·1 answer
  • Koi mera aake chus lo Aur heela bhi do​
    15·2 answers
  • An organic compound of relative molecular mass 46,on analysis was found to contain 52.0% carbon, 13.3% hydrogen and 34.7% oxygen
    10·1 answer
  • What car do you want to have.
    8·2 answers
  • Which statement is true about the speed of light? (2 points) Light travels relatively slowly. Distance in space is measured usin
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!