A chunk of limestone, which is calcium carbonate, reacts with acid. How might you increase the rate of this reaction?
2 answers:
Answer: Option (b) is the correct answer.
Explanation:
When calcium carbonate is added to an acid then the reaction will be as follows.
The formed is easily soluble in water.
Therefore, when we crush calcium carbonate the surface area of particles will increase. As a result more number of molecules will be dispersed in the acid, hence more is the number of calcium carbonate particles more readily the reaction will occur.
Thus, we can conclude that the rate of this reaction increases when we crush the lime stone or calcium carbonate.
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Answer:
D. 0.75 grams
Explanation:
The data given on the iridium 182 are;
The half life of the iridium 182, = 15 years
The mass of the sample of iridium, N₀ = 3 grams
The amount left, N(t) after two half lives is given as follows;
For two half lives, t = 2 ×
∴ t = 2 × 15 = 30
∴ The amount left, N(t) = 0.75 grams