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Andru [333]
3 years ago
15

A green solution of a pH indicator was added to a sample of spring water. The resulting solution was yellow. Was the observed ch

ange due to a physical or a chemical change
Chemistry
1 answer:
adell [148]3 years ago
7 0

Answer:

Chemical Change

Explanation:

Color changes in chemical compounds are as a result of chemical reactions between the two reactant , and in this case a new reactant is been formed.

which eventually changes the color to yellow.

Indicators like Leucomalachite green do changes from green ( base) to yellow (acidic).

So for a new product to be formed which is of different color and chemical properties,the observation change is definitely a chemical change

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kakasveta [241]
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5 0
3 years ago
Red blood cells are formed in the bone marrow of the _______
Lostsunrise [7]
Red blood cells are formed in the red bone marrow of bones. Stem cells in the red bone marrow called hemocytoblasts give rise to all of the formed elements in blood. If a hemocytoblast commits to becoming a cell called a proerythroblast, it will develop into a new red blood cell.
6 0
3 years ago
How does a combination reaction differ from a decomposition reaction
OverLord2011 [107]

Answer:

Explanation:

Combination Reaction: is a reaction that occurs when two or more reactants combine to form a single new products. The reactants can either be Elements or Compounds. It does not require heat during the reaction.

A + B ---------> C

C (s) + O2 (g) ----------> CO2 (g)

CaO (s) + H2O (l) ---------> Ca(OH)2 (s)

In this reaction, energy is released.

Decomposition Reaction: is a reaction that occurs when a a single reactant is broken down to form two or more products. Application of heat is usually required in this type of reaction.

       Δ

AB --------->   C + D

                   Δ

CaCO3 (s) --------> CaO (s)  + CO2 (g)

In this reaction, energy is absorbed.

5 0
3 years ago
What is the ratio of Al 3+ ions to S 2- ions in a neutral compound?
svp [43]
Al^{3+}_{2}S^{-2}_{3}

In a neutral compound sum of charges should be equal 0,

+3*2-2*3=0,
so ratio of ions n(Al³)⁺:n(S²⁻)=2:3 
4 0
4 years ago
The height of a building is 31.0 meters.how tall is the building in kilometers?
Sonja [21]
To find the answer, you would use Dimensional Analysis, as follows:

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4 years ago
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