Answer:
500 mL graduated cylinder
Explanation:
it is used for small liquids
Chloroform combines with acetone in the presence of potassium hydroxide to give chloretone, which is used as a sleep producing (hypnotic) drug.
Answer:
Bud's results have much greater accuracy than precision
Explanation:
Accuracy and precision are two very important terms in analytical chemistry. To a large extent, they decide the degree of reliability of a given result of analysis.
Accuracy refers to how close one's result is to the true value. Bud N's results were all very close to the true value of 4.75 g/cm3 hence the results have a high degree of accuracy.
Precision refers to how close, a set of values from a replicate analysis are to each other.
A close look at Bud N's data indicate that they are not very close to each other; 4.77 g/cm3, 4.67 g/cm3, 4.69 g/cm3, and 4.81 g/cm3. This means that the set of data lack precision.
Answer:
NHCOR
Explanation:
In electrophilic aromatic substitution, certain substituents on the aromatic ring such as
-NHCOR are known to enhance ortho-para substitution. These ortho-para activating groups stabilizes the intermediate cation.
These ortho-para activating groups usually consists of species that donate electron density towards the reaction centre thereby stabilizing the carbocation and making the reaction faster.
