### Significant Digits – Chemistry Quiz

This quiz covers significant digits – Chemistry Quiz

Multiply or divide the following measurements. Be sure each answer you enter contains the correct number of significant digits.

**Correct Answers**

**770.6g ÷ 0.42mL = 1.8 x 10 ^{3 }g/mL**

**7.81cm × 3.30cm = 25.8cm ^{2}**

**940.85g ÷ 54.2mL = 17.4g/mL**

Add or subtract the following measurements. Be sure each answer you enter contains the correct number of significant digits.

**Correct Answers**

**2.500mL + 10.97mL = 13.47mL**

**17.97mL + 9.7mL = 27.7mL**

**18.50mL − 12.7mL = 5.8mL**

Complete the table below.

**Correct Answers**

**70 dL = 7 L**

**2 Mg = 2,000,000 g**

**3 ks = 3000 s**

**2000 mm = 2 m**

A molecular biologist measures the mass of cofactor A in an average yeast cell. The mass is 96.7 pg. What is the total mass in micrograms of cofactor A in a yeast colony containing 10^{5} cells? Write your answer as a decimal.

**9.67 µg** **– Correct **

A geologist measures the height of a mountain. The height is 3.8749 km. What is the height in meters? Write your answer as a decimal.

**3874.9 m – Correct**

A student sets up the following equation to convert a measurement.

(The ? stands for a number the student is going to calculate.) Fill in the missing part of this equation.

**(0.010 g/mL).(1mL/10 ^{-3}L) = ? g/L**

**– Correct**

Multiply or divide the following measurements. Be sure each answer you enter contains the correct number of significant digits.

**Correct Answers**

**561.00mol ÷ 0.90L = 6.2 x 10 ^{2} mol/L**

**93.4g/mL × 47.mL = 4.4 x 10 ^{3} g**

**294.77mol ÷ 43.02L = 6.852 mol/L**

A student sets up the following equation to convert a measurement.

(The ? stands for a number the student is going to calculate.)Fill in the missing part of this equation.

**(-4.7 x 10 ^{3} N/cm).(1 cm/10^{-2} m).(10^{-3} m/1 mm) = ? N/mm –**

**Correct**