What is true of a measurement in which a chemical weighs 0.031 g?

Question

What is true of a measurement in which a chemical weighs 0.031 g??  
A. It is accurate to 0.1 g and contains 4 significant figures.  
B. . It is accurate to 0.01 g and contains 3 significant figures.  
C. It is accurate to 0.001 g and contains 2 significant figures.  
D. It is accurate to 0.0001 g and contains 1 significant figure.

NursesPath · Accepted Answer

Correct Answer: (C)It is accurate to 0.001 g and contains 2 significant figures.. 
Rationale: The measurement is accurate to 0.001 g and contains 2 significant figures.The recorded mass is 0.031 g. To interpret this measurement correctly, two ideas are important: significant figures and the precision of the measuring instrument. Leading zeros (zeros before the first nonzero digit) do not count as significant figures; they only locate the decimal point. The significant digits here are the 3 and the 1, giving a total of two significant figures. The final recorded digit is in the thousandths place, indicating the measurement was taken to the nearest 0.001 g.A. It is accurate to 0.1 g and contains 4 significant figuresThe value is not measured to the tenths place, and the leading zeros do not count as significant figures. The measurement does not contain four significant figures.B. It is accurate to 0.01 g and contains 3 significant figuresThe measurement extends to the thousandths place, not the hundredths place, and only two digits (3 and 1) are significant, not three.C. It is accurate to 0.001 g and contains 2 significant figuresThis is correct. The last recorded digit is in the thousandths place (0.001 g), and only the digits 3 and 1 are significant.D. It is accurate to 0.0001 g and contains 1 significant figureThere is no digit in the ten-thousandths place, and the measurement clearly has two significant figures, not one.ConclusionThe measurement 0.031 g shows precision to the nearest thousandth of a gram, and only the nonzero digits contribute to its significance. This indicates a precision of 0.001 g and a total of two significant figures.

What is true of a measurement in which a chemical weighs 0.031 g?

A
It is accurate to 0.1 g and contains 4 significant figures.

B
. It is accurate to 0.01 g and contains 3 significant figures.

C
It is accurate to 0.001 g and contains 2 significant figures.

D
It is accurate to 0.0001 g and contains 1 significant figure.

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What is true of a measurement in which a chemical weighs 0.031 g?

A It is accurate to 0.1 g and contains 4 significant figures. B . It is accurate to 0.01 g and contains 3 significant figures. C It is accurate to 0.001 g and contains 2 significant figures. D It is accurate to 0.0001 g and contains 1 significant figure.

Topic Flashcards

Mini Quiz

Related Questions

A
It is accurate to 0.1 g and contains 4 significant figures.

B
. It is accurate to 0.01 g and contains 3 significant figures.

C
It is accurate to 0.001 g and contains 2 significant figures.

D
It is accurate to 0.0001 g and contains 1 significant figure.