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malfutka [58]
3 years ago
8

What does it mean to have a control group

Chemistry
2 answers:
MrRissso [65]3 years ago
4 0
The control group<span> is defined as the </span>group<span> in an experiment or study that </span>does<span> not receive treatment by the researchers and is then used as a benchmark to measure how the other tested subjects </span>do<span>.</span>
Mashcka [7]3 years ago
3 0
Control group is a group in a lab or project that is completely controlled and you know exactly how you want it to go. Example: you have your controlled group of cereal and theyre all froot loops with the same cereal same bowl. the opposite of that would be having the same bowl, same milk, and 3 different cereal brands.
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If the concentration of Mg2+ in the solution were 0.039 M, what minimum [OH−] triggers precipitation of the Mg2+ ion? (Ksp=2.06×
Elodia [21]

Answer:

2.30 × 10⁻⁶ M

Explanation:

Step 1: Given data

Concentration of Mg²⁺ ([Mg²⁺]): 0.039 M

Solubility product constant of Mg(OH)₂ (Ksp): 2.06 × 10⁻¹³

Step 2: Write the reaction for the solution of Mg(OH)₂

Mg(OH)₂(s) ⇄ Mg²⁺(aq) + 2 OH⁻(aq)

Step 3: Calculate the minimum [OH⁻] required to trigger the precipitation of Mg²⁺ as Mg(OH)₂

We will use the following expression.

Ksp = 2.06 × 10⁻¹³ = [Mg²⁺] × [OH⁻]²

[OH⁻] = 2.30 × 10⁻⁶ M

3 0
3 years ago
How many orbitals are contained in the third main energy level and in the fifth energy level
antoniya [11.8K]

There are 9 orbitals in the third energy level and 25 orbitals in the fifth energy level.

I hope this helps you.

5 0
3 years ago
ANSWER ASAP IF YOU KNOW THIS ......What is the mass number of this atom?
trasher [3.6K]
The correct answer is 7 I just took the test :)
6 0
3 years ago
Read 2 more answers
Identify the compound that would have the highest osmotic pressure when dissolved in water. nacl k2so4 mgcl2 fecl3 mgso4
brilliants [131]

The compound that would have the highest osmotic pressure when dissolved in water is FeCl_{3} .

So,  option D is correct one.

The dissociation of one molecule of  FeCl_{3} gives the maximum number of ions when dissolved in water ( 4 ions ) . Osmotic pressure is a colligative property and depends upon number of solute particles present in the solution . The solution having maximum number of solute particles will have maximum number of the osmotic pressure .

All other given molecules gives less number of number of ions when dissolved in water as compare to of  FeCl_{3} .

To learn more about osmotic pressure

brainly.com/question/10046758

#SPJ4

5 0
2 years ago
Why do noble gases not have electronegativity values
Mrrafil [7]

Noble gases already have eight electrons in their outer shells and they don't want to attract anymore. Since electronegativity measures the amount of attraction between an atom and an electron, noble gases do not have electronegativity.

Did this help?

6 0
3 years ago
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