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
kirza4 [7]
3 years ago
13

"a basic experiment involves a minimum of ________ participant group(s)."

Chemistry
1 answer:
3241004551 [841]3 years ago
5 0
Answer: TWO.

At least two groups: treatment group and control group.

The treatment group is that is exposed to the different levels of the independent variable ( a medication for example), while the control group is not treated, so the researchers can compare the effect of the medication.
You might be interested in
What is the numbers to the C02
andriy [413]

Answer:

413.20 ppm

Explanation:

4 0
3 years ago
Billions of pounds of urea are produced annually for use as a fertilizer. Balance the skeletal equation for the synthesis of ure
klio [65]
2NH₃(g) + CO₂(g) → CO(NH₂)₂(s) + H₂O(l)
is the balanced equation for the synthesis of urea.
5 0
3 years ago
How many moles are there in 3.612 x 1024 formula units of Na2SO4?
vitfil [10]

Answer:

<h3>Theanswer is 6 moles</h3>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L}  \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{3.612 \times  {10}^{24} }{6.02 \times  {10}^{23} }  \\

We have the final answer as

<h3>6 moles</h3>

Hope this helps you

5 0
3 years ago
Distinguish between accuracy and precision in measurements
nignag [31]

The accuracy is associated with magnitude of fractional error or relative error in that measurement

the precision of a measurement is associated with least count of the measuring instrument.

precision does not mean accuracy but both are highly demanded while making measurements in physics.

7 0
3 years ago
What is the percent composition of hydrogen in NH4HCO3?
Readme [11.4K]
To find the Percent Composition of an atom, you use this formula:
Mass of element in the compound you're studying on ( in this case it's 5 since there is 5 Hydrogens) over the mass of the compound (which is here 79), Multiplied by 100 since you want a percent. 
So we get: 
\frac{5}{79} * 100
So you get about: 
0.063 * 100
6.3

So, the percent composition of Hydrogen in NH4HCO3 is 6.3%

Hope this Helps! :D


7 0
3 years ago
Read 2 more answers
Other questions:
  • A substance has a heat of fusion of 155 J/g. How many joules of energy are required to be removed in order to freeze a 10.0 g sa
    13·1 answer
  • write the chemical equation for the following reaction: the elements carbon and oxygen combine to yield the compound carbon diox
    15·1 answer
  • If oxygen, symbol o, undergoes a covalent bond it wants to form how many bonds
    7·2 answers
  • How many moles of water are in 1.23 x 10^18 water molecules?
    13·2 answers
  • What's 5 type of energy​
    11·1 answer
  • A chemistry student was asked to calculate the number of moles of iron required to react with 1.20 mol of oxygen to produce iron
    9·1 answer
  • Gold(ill) hydroxide is used in medicine, porcelain making, and gold plating. It is quite insoluble in aqueous solution. Which of
    6·1 answer
  • Which of the following is an example of chemical weathering?
    5·1 answer
  • Calculate the energy of the lasers in a Blu-ray player, which emit at a wavelength of 4.05x10−7 m.
    13·1 answer
  • Give two test substances that would react with each other to produce salt and water​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!