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Rudiy27
3 years ago
14

Describe two observations you might make when a chemical change occurs

Chemistry
1 answer:
Sav [38]3 years ago
7 0
The first one is color change
Second is the precipitate present
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Question 1 of 6
Juli2301 [7.4K]

Answer:

Option A. 2, 3, 2

Explanation:

We'll begin by balancing the equation. This can be achieved by doing the following:

Fe + Cl2 —> FeCl3

There are 2 atoms of Cl on the left side and 3 atoms on the right side. It can be balance by putting 3 in front of Cl2 and 2 in front of FeCl3 as shown below:

Fe + 3Cl2 —> 2FeCl3

There are 2 atoms of Fe on the right side and 1 atom on the left side. It can be balance by putting 2 in front of Fe as shown below:

2Fe + 3Cl2 —> 2FeCl3

Now the equation is balanced.

The coefficients are : 2, 3, 2

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3 years ago
Each of the diagrams below shows an electrically neutral atom. fill in the missing number of protons (n) neutrons (and), electro
vova2212 [387]
What is the diagram?
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3 years ago
Phenolphthalein meaning
Simora [160]

Answer:

Phenolphthalein is a chemical compound with the formula C20H14O4 and is often written as "HIn" or "phph" in shorthand notation. Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions.

3 0
3 years ago
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A mixture of 10 cm3 of methane and 10 cm3 of ethane was sparked with an excess of oxygen. After cooling to room temperature, thr
Tpy6a [65]
In the combustion process using excess oxygen, each mole of methane results to 1 mole of co2 while ethane produces 2 moles of Co2. Under same conditions, these can be translated to volume. Hence the total volume absorbed is 10 cm3 + 20 cm3 = 30 cm3.
5 0
3 years ago
Food is the only limiting factor that keeps populations from growing too large true or false?
topjm [15]
FALSE

There are other limiting factors like lack of space, diseases, and com petition.
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