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
34kurt
3 years ago
13

What does control group mean

Chemistry
1 answer:
fiasKO [112]3 years ago
7 0
A control group is the group in an experiment that does not receive any sort of change, to then be compared to the other treated objects at the end of the study.
You might be interested in
Grignard reactions are highly exothermic and are performed in ether solvent. There is a real risk of fire during this reaction.
AleksAgata [21]

Answer:

Ideally, extinguish the flames with a glass watch or beaker.

Explanation:

When you cover the distillation equipment with a watch glass or beaker, you reduce the oxygen content and it is completely eliminated thanks to the fire itself that consumes it. Once there is no more oxygen the fire is extinguished and it should take no more than 2 or 3 seconds to occur this situation

It is the easiest and most careful way to extinguish the fire during the Grignard reaction

8 0
3 years ago
Which of these solutes raises the boiling point of water the most?
VMariaS [17]
Raising of the boiling point is a colligative property. That means that it depends on the number of particles dissolved. The greater the number of particles the greater the increase in the boiling point. So, you can compare the effect of these solutes in the increase of the boiling point by writing the chemical equations and comparing the number of particles dissolved: 1)ionic lithium chloride, LiCl(s) --> Li(+) + Cl (-) => 2 ions; 2) ionic sodium chloride, NaCl(s) --> Na(+) + Cl(-) => 2 ions; 3) molecular sucrose, C12H22O11 (s) ---> C12H22O11(aq) => 1 molecule; 4) ionic phosphate, Na3PO4 --> 3Na(+) + PO4 (3-) => 4 ions; 5) ionic magnesium bromide, MgBr2 --> Mg(2+) + 2 Br(-) => 3 ions. <span>So, ionic phosphate produces the greatest number of particles and it will cause the greatest increase of the boiling point.</span><span />
4 0
3 years ago
Medical diagnosis and ______ are common uses of radioactive elements in health care.
KengaRu [80]
<span>The half-life of Carbon 14 and radionuclides are used to estimate the absolute (versus relative) age of pre-history items </span>
6 0
2 years ago
How many electrons are there in the following compound?
Marina86 [1]

Answer:

look it up in google it dead in your face m8 i just did

Explanation:

4 0
3 years ago
What is the solubility of CaCl2 at 20°C
slavikrds [6]

Answer:1,01

Explanation:

3 0
2 years ago
Other questions:
  • How does the modern periodic table arrange elements?
    7·1 answer
  • Jonah observes the sun through a special filter telescope during a total solar eclipse. He sees a red ring and a faint white rin
    13·2 answers
  • The synthesis of dipropyl ether can be accomplished using 1-propanol. What reactants and conditions are necessary for this to oc
    15·1 answer
  • Convert 550 cm into m. Please show your work.
    8·1 answer
  • What type of intermolecular force exist between H2O and Br2
    6·1 answer
  • All atoms in the main group want _____ electrons in their outset shell
    6·1 answer
  • Can you write the answer for lot of points ​
    12·2 answers
  • ANYONE PLEASE HELP ME WITH MY CHEMISTRY HOMEWORK I REALLY NEED THE ANSWER RIGHT NOW I HOPE Y’ALL CAN HELP ME:(
    13·1 answer
  • How many nitrate ions are in 2 mol of iron (II) nitrate
    13·1 answer
  • add or subtract the following measurements. be sure each answer you enter contains the correct number of significant digits. −4.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!