Which of these chemistry measurements are true or false?

1. Accuracy is the closeness of a measurement to other measurements.


2. Deviation is the measure of accuracy.


3. When making a measurement, record all digits that are known for certain plus one that is estimated.


4. The relationship between density and volume is an example of an inverse relationship.


5. The relationship of an objects mass to its volume is an example of a direct relationship.


6. Precision is the closeness of a measurement to an accepted value.Which of these chemistry measurements are true or false?
1.. False... this is precision





2...False...Deviation is a measure of precision. % difference or % error is a measure of accuracy.





3...True.





4...True... D = m / V... D and m are directly related.. as 1 goes up so does the other, D and V are inversely related. as 1 goes up, the other goes down





5...True...at constant density, m / V is constant. as one goes up, so does the other... maybe help to do this... D = m / V, D x V = m





6...False... this is the definition of accuracyWhich of these chemistry measurements are true or false?
1) F, that is precision


2) F


3) T, unless you work in the real world, at which time the number of digits is determined by the validation of precision and accuracy.


4) T, as volume of a mass increases, density decreases.


5) T, as mass increases, so does volume if density remains constant.


6) F, that is accuracy

good myspace