Answer:
9
option d 9
pH of a 10^-5 M HCI solution is 9
Answer:
No results found for 0.265g of an organic compound produced on evaporation 102cm cube of vapour at 373K and 775mmHg. Percentage composition of the constituent elements are 92.24% C and 7.76% H. Find the molecular mass and molecular formula of the composition..
Results for 0.265g of an organic compound produced on evaporation 102cm cube of vapour at 373K and 775mmHg Percentage composition of the constituent elements are 92.24 C and 7.76 H Find the molecular mass and molecular formula of the composition
The "A)The water is part of the system" statement is true in the coffee-cup calorimeter used in the laboratory. The calorimeter is the device used for measuring the amount of the heat flow of a chemical reaction. The coffee-cup calorimeter is one of the most common types of calorimeter which has the water as a part of its system<span>.</span>
Answer:
a) Precision
b) Accuracy
c) Accuracy and precision
d) Accuracy
Explanation:
When an experiment is done more than once to determine if the results are statistically ok, two forms of the validations are possible the accuracy and precision. When the values of the various experiments are close to the known value, then they are accurate. When the values are close to each other they are precise. So, sometimes the results are precise but are not accurate, and vice-versa.
a) Here, the person wants to find if the 5 aliquots will have close results, so, he or she is looking for precision.
b) Here the amount of analyte is already known, and the person wants to identify if the value will be the same when analyzed together with another sample, thus he or she is looking for accuracy.
c) Here the three results will be compared with each other (precision) and with the standard value of the method (accuracy).
d) The methods will be tested, and the values will be compared with the standard known value, so the person is looking for accuracy.
