Blog

Which of the following is NOT an example of a nucleic acid?

A plant cell can most easily maintain high pressure when it is in a

Which of the following illness / diseases are related to exposure asbestos? (select all that apply)

Size-selective microscopic counting is often used to analyze which of the following particulate matters?

The fire point of a flammable liquid is usually about ____ the flash point temperature.

The lowest temperature at which a liquid gives off enough vapor to form an ignitable mixture with the air near the surface of the liquid is called ______.

A worker was exposed to inorganic lead dust at 7 mg/m3 for 3.0 hrs, at 6 mg/m3 for 4 hrs, and 9.2 mg/m3 of dust for 1.0 hrs. What was the TWA? If the company is adopting TLV (50 µg/m3) as standard for inorganic lead, was the exposure in compliance, and why? The inorganic lead has 207.2 g/mol. What’s the TWA in ppm? Show your step-by-step calculation process and include appropriate unit for credits.

Fibers (e.g., asbestos) have an aspect ratio (length / width) of at least ____ to 1.

What are the effects related to toxic substance exposures

What is a functional group in organic molecules?