Answer:
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the color of the pH balance is dark blue
Explanation:
A pH indicator corresponds to a substance that measures the pH of the solution in question. in the case of neutral substance the color that the solution takes is dark blue, if it is acidic it turns pink or red and basic of a green tone. Some examples of indicators: phenolphthalein, bromophenol blue, methyl red, among others.
Answer:
See explanation
Explanation:
The molecular mass is the sum of the relative atomic masses of all the atoms in the molecule.
The relative atomic mass of reactants and products are calculated as follows;
Benzoic acid is C7H6O2 hence the molar mass of benzoic acid is ;
7(12) + 6(1) + 2(16) = 84 + 6 + 32 = 122.0 g/mol
Methyl benzoate is C8H8O2
8(12) + 8(1) + 2(16) = 96 + 8 + 32 = 136.0 g/mol
Answer: e. Two of these
Explanation:
(a) 
When is dissolved in water. It reacts to form sulfurous acid. The chemical reaction is shown below:
Therefore, is acidic when dissolved in water.
(b) 
When is dissolved in water. It reacts to form nitric acid. The chemical reaction is shown below:
Therefore, is acidic when dissolved in water.
(c) 
Sodium is a metal. It gives sodium hydroxide on reaction with water. The chemical reaction is as follows:
Therefore, Na is basic when dissolved in water.
(d) 
Calcium oxide is a metallic salt. It gives calcium hydroxide on reaction with water. The chemical reaction is as follows:
,
Therefore, is basic when dissolved in water.
(e) Two of these.
Since both and give acids when dissolved in water, both are acidic.
Density because a substance always has the same density, but mass can be different and volume depends on mass
