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ikadub [295]
3 years ago
6

How does a scientist explain something when a controlled experiment cannot be carried out

Chemistry
1 answer:
alina1380 [7]3 years ago
5 0
Usually the controlled experiment is the one that is not tested so they look at the experimental experiment to find the differences. Sorry if this doesn't answer your question.
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The liquid in your stomach has a pH of about 2, so it is ________.I
iren2701 [21]

Answer:

A. an acid

Explanation:

8 0
2 years ago
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3CuCl2 + 2Al => 3Cu + 2AlCl3
Marrrta [24]

The reaction includes the single replacement reaction and redox

<h3>Further explanation</h3>

Single replacement : one element replaces another element in a compound

A + BC ⇒ AC + B

The oxidation-reduction reaction or abbreviated as Redox is a chemical reaction in which there is a change in oxidation number

3CuCl + 2Al => 3Cu + 2AlCl₃

  • 1. Single replacement

Al replacing Cu in the CuCl compound

  • 2. Redox reaction

3Cu²⁺ + 6e⁻⇒ 3Cu reduction(oxidation number from +2 to 0)

2Al⇒2Al³⁺+6e⁻ oxidation(oxidation number from 0 to +3)

8 0
3 years ago
When water reaches its boiling point and turns into water vapor what happens to its molecular structure
Alex787 [66]
When water reaches its boiling point and turns into water vapor, the molecular structure of water remains the same. It is only the state of the substance that is changed in this process. I hope this helps you 
8 0
3 years ago
you are given 500 mL of a 5M stock solution of ammonium chloride but for your experiment, you only need 100 mL of a 0.65M soluti
mafiozo [28]

Answer:

13ml

Explanation:

  1. to prepare dis solution first you need a volumetric flask of 100ml calibrated .
  2. using dilution formulae u will need 13ml from the stock
  3. measure 13ml of the 5M stock of the 500ml
  4. then drop it into the 100ml calibrated flask
  5. then add water till it reach d mark and you shake thoroughly
6 0
3 years ago
An isotope of iron has 28 neutrons. If the atomic mass of the isotope is 54, how many protons does it have?
Crazy boy [7]
26 because you need to do 54-28=26
The atomic mass number is the number of protons AND neutrons together.
5 0
3 years ago
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