Chemistry, 02.09.2020 02:01 Anabel818

Complete each of the definitions with the appropriate phrase. Precision means that measurements are close to Accuracy means that measurements are close to

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Answer from: meg329

Precision means that independent measurements are close to each other.

Accuracy means that independent measurements are close to a known or accepted value.

Explanation:

Accuracy refers to how close the measurements of a measurement system are to the true value while precision refers to how close the measurements are to each other. In other words, accuracy is the closeness of the value of one or more independent measurements to a true value, and precision is the closeness of two or more values of several measurements to each other.

Both are independent of each other, that is to say that the results in the values of a measurement can be precise and not exact, and vice versa.

So:

Precision means that independent measurements are close to each other.

Accuracy means that independent measurements are close to a known or accepted value.

Answer from: Quest

hey there!

boiling point is the temperature at which the vapor pressure of the liquid equals atmospheric pressure. the vapor pressure of solvent molecules is decreased when a solute is added, so a higher temperature is required to increase the number of solvent molecules in the gas phase above the liquid.

at the freezing point, the vapor pressures of the solid and liquid are equal; a lower temperature is needed to reduce the number of solvent particles above the liquid.

hope this you

tobey

Answer from: Quest

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

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Complete each of the definitions with the appropriate phrase. Precision means that measurements are...

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