Chemistry Safety and Measurements Quiz

What is the correct method to convert milligrams to grams?

What is the wavelength of a transition from n=5 to n=1 state?

What is the correct scientific notation for the diameter of a carbon atom, approximately 0.000000000340 m?

Which measurement is equivalent to exactly 1 cubic meter (1 m³)?

What is the required measurement to record if the balance reading is 0.40012 g?

Which piece of glassware is most suitable for measuring a precise volume of liquid?

Based on the measurements provided (12.62 mL, 12.60 mL, 12.71 mL, 12.57 mL), how would you calculate the average?

What does the Rydberg formula calculate?

Safety and Material Safety Data Sheets (MSDS)

MSDS (now called SDS) are available in two locations: on a bulletin board and in each lab room.

Data and Measurements Recording

Record measurements to one decimal place beyond the least precise measurement.
For example, if the balance reads 0.40012 g, record it as 0.400 g

Unit Conversions

To convert from mg to g, divide by 1000.

Heating and Handling Crucibles

Use crucible tongs to remove a hot crucible from the clay triangle on a ring stand.

Measurement Length

Using the provided image, the length measurements are:
- 8.5 cm.
- 3.3 in.
- 0.085 m

Lewis Structures and Geometry

NH3 (ammonia) has a tetrahedral electron geometry.

Wavelength Calculation

The wavelength of the n=5 to n=1 transition:
- Use the Rydberg equation: 1/λ = RH [(1/nf^2) - (1/ni^2)]
- RH (Rydberg constant) = 1.0974 x 10^7 m^-1
- nf (final energy level) = 1
- ni (initial energy level) = 5
- Solve the equation to find λ (wavelength).

Density Calculation

The density of titanium is 4.50 g/cm3.

Scientific Notation

The diameter of a carbon atom in scientific notation is 3.40 x 10^-10 m.

Volume Conversion

1 m^3 is equivalent to 10^9 cm^3.

Precise Liquid Volume Measurement

Use a volumetric flask to measure a precise volume of liquid.

Data Analysis

For the given measurements: 12.62 mL, 12.60 mL, 12.71 mL, and 12.57 mL
- The average is 12.625 mL
- The relative percent deviation is 0.10% for each measurement.

Test your knowledge on safety protocols, material safety data sheets (SDS), and precise measurement techniques in chemistry. This quiz covers unit conversions, handling of lab equipment, and basic molecular structure understanding. Perfect for students looking to reinforce their chemistry lab skills.