Shown below and to the right is a balance. Based on this instrument, identify fr

Question

Shown below and to the right is a balance. Based on this instrument, identify from the following list all the statements that are true if you were to use this balance to measure the mass of a sample. A mass measured on this balance will always have three significant digits. The uncertainty is in the hundredths place. A mass that falls between 1 and 9 measured on this balance will always have three significant figures. A mass that falls between 100 and 200 grams measured on this balance will have five significant figures. A mass that falls between 10 and 80 grams measured on this balance will always have three significant figures. The uncertainty is in the tenths place. A mass measured on this balance will always have four significant digits. The mass measured on this balance is known exactly. The uncertainty is in the ones place.

Explanation / Answer

A mass that falls between 10 g to 80 g , if measured on this balance will be read as 10.00 g to 80.00 g

This will have 4 significant figures.

It is same as a mass that falls between 1 g to 9 g , if measured on this balance will be read as 1.00 g to 9.00 g and will have 3 significant figures. Likewise a mass that falls between 100 g to 200 g , if measured on this balance will be read as 100.00 g to 200.00 g and will havnife 5 sigficant figures.

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