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Rzqust [24]
3 years ago
4

Why is it important to have a control group in an experimental investigation?

Chemistry
2 answers:
Natali [406]3 years ago
5 0

Answer:

to compare the results when the independent variable is not involved

Explanation:

Dependent variable depends on the independent variable. Independent variable is the one that is being tested in a science experiment to test how it is affecting the dependent variable.

In a control group in an experimental investigation the independent variable is omitted. Thus the goal is to test if the dependent variable shows any change in the absence of the independent variable.

Alika [10]3 years ago
4 0

to compare the results when the independent variable is not involved

is the correct answer

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The ksp of agcl is 1.6 x 10-10. what is the solubility of agcl in 0.010 m fecl3? give your answer using scientific notation (1.2
bija089 [108]

Ksp of AgCl= 1.6×10⁻¹⁰

AgCl=Ag⁺ +Cl⁻

Ksp=[Ag⁺][Cl⁻]

Assume [Ag⁺]=[Cl⁻]=x

Ksp=x²

1.6×10⁻¹⁰=x²

x=0.000012

In FeCl₃:

FeCl₃------>Fe⁺³+ 3Cl⁻

as there is 0.010 M FeCl₃

So there will be ,

[Cl⁻]= 0.030

So

[Ag⁺]=Ksp/[Cl⁻]

=1.6×10⁻¹⁰/0.030

=5.3×10⁻⁹

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7 0
3 years ago
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ICl has a higher boiling point than Br2. What is the best explanation for this?
Burka [1]

Answer:

b. ICl experiences dipole-dipole interactions

Explanation:

The molecule with the <em>stronger intermolecular forces</em> will have the higher boiling point.

In Br₂, the Br-Br bond has a <em>dipole moment of zero</em>, because the two atoms are identical.

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ICl will have the higher boiling point.

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d is <em>wrong</em>. ICl has dipole-dipole interactions.

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Answer:

Here's the answer in order

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