Chemistry 3B Quiz Sig Figs & Accuracy/Precision

The standard length of a certain golf club is 123.67 cm. You measure the club to be 119.068453 cm long. Is your measurement accurate or precise?

• Accurate

• Precise

The smaller the percent error, the more __________ the measurement is.

• Accurate

• Precise

You measure products of a chemical reaction three times and get 4.15 g, 4.16 g. and 4.13 g. The actual mass is 4.14 g. Your measurements are

• Accurate but not precise

• Precise but not accurate

• Both accurate and precise

• Neither accurate not precise

Significant digits apply only to _________ data.

• Pure

• Counted

• Measured

• Defined

What indicates the precision of an instrument and helps scientists report measurements accurately?

• significant digits

• unit analysis

• scientific notation

• units of measurement

The measurement 0.04508 g has how many significant digits?

• 1

• 2

• 3

• 4

The measurement 0.23010 m has how many significant digits?

• 2

• 3

• 4

• 5

How many significant digits are in 134 g?

• 1

• 2

• 3

• 4

Which has the greatest number of sig figs: 54,230 students, 2.45 m, 5.4 km, or 23,000 mL?

• 54,230 students

• 2.45 m

• 5.4 km

• 23,000 mL

Perform the following operation, observing significant digits. (26.9 cm)(5.0 cm).

• 1.3 squared meter

• 13 squared meters

• 130 squared meters

• 1300 squared meters