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
Elis [28]
2 years ago
6

Why is a control needed in a valid experiment?

Chemistry
1 answer:
aliina [53]2 years ago
5 0
You need a control so you have something to compare the experimental group on-- If you don't have a control group, how will you know what's changed?
You might be interested in
How many ug of nickel (Ni) are required to make 25.00 nanoliters of a 1.25 mol/L solution? Be sure to report your answer to the
devlian [24]

volume of Ni = 25 nL = 25 x 10⁻⁹ L

mol Ni = 25 x 10⁻⁹ L x 1.25 mol/L = 3.125 x 10⁻⁸

mass = mol x Ar Ni

mass = 3.125 x 10⁻⁸ x 59 g/mol

mass = 1.84 x 10⁻⁶ g = 1.84 μg

4 0
2 years ago
Read 2 more answers
What is the name of an immune system response to a substance in food?
poizon [28]

Answer:

The adaptive (also called humoral or specific) immune system is typically only involved in immune responses to bacteria, bacterial toxins and virus antigens. It involves the production of antibodies (also called immunoglobulins) against a specific target. The target of an antibody is called an antigen.

3 0
3 years ago
How does the process of cellular respiration create energy?
Pavlova-9 [17]

Answer:

well, through the process of cellular respiration, the energy in food is converted into energy that can be used by the body's cells. During cellular respiration, glucose and oxygen are converted into carbon dioxide and water, and the energy is transferred to ATP

7 0
2 years ago
Read 2 more answers
Please select the word from the list that best fits the definition<br><br> growth from seed to plant
Misha Larkins [42]
Is there a picture for this question ?
8 0
2 years ago
Read 2 more answers
After the recycled plastic is released from the machine into the brick mold, explain what will happen to the kinetic energy in t
Rina8888 [55]

Answer: Depending on the data and the patterns, sometimes we can see that pattern in a simple tabular presentation of the data. Other times, it helps to visualize the data in a chart, like a time series, line graph, or scatter plot.

Explanation:

1960 5.91

1970 5.59

1980 4.83

1990 4.05

2000 3.31

2010 2.60

8 0
2 years ago
Other questions:
  • ¿Qué similitud existe entre un jugo natural de fruta y la neblina?
    10·1 answer
  • Which element would be the least similar to magnesium (Mg)?<br> A. Sr<br> B. Na<br> C. Be<br> D. Ca
    10·1 answer
  • Use the oxidation rule to determine the oxidation number of carbon in H2CO3
    8·1 answer
  • What are the two most common elements in the entire universe
    14·2 answers
  • Lucia drew a diagram to compare animal cells and plant cells. Which label belongs in the area marked Y?
    9·2 answers
  • What happens when an electron absorbs energy
    15·2 answers
  • If the temperature and amount of gas stays constant, what will happen to the pressure of a gas if the volume of the container de
    14·1 answer
  • Give 3 examples of conduction, radiation, and convection.
    14·2 answers
  • If the methane contained in 2.50 L of a saturated solution at 25 ∘C was extracted and placed under STP conditions, what volume w
    8·1 answer
  • Hurricanes derive their energy from: Group of answer choices the latent heat of condensation. the latent heat of fusion. the lat
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!