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.

Okay, so go back and enter the zero for the 2nd quiz. Then what minimum average score would you need on the last two quizzes to raise your overall course grade to a B?

As an example, assume you earned scores of 12, 0 (skipped the 2nd quiz), 17, 21, 19, and 11 on the first six quizzes. Although you are not sure about your final pre-quiz score, for now assume that you will earn 29 points on the pre-quizzes. If you only scored 13 points on each of the remaining quizzes (the blue box on the estimator file) what would your final grade be?

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 ______.

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

Vapor pressure is an important parameter for considering airbrone concentration of a chemical at equilibrium. Vapor pressure is highly dependent on _____

Compared with organic solutions, aqueous solutions have a high potential hazard for inhaling vapors.

What is a functional group in organic molecules?

Excess energy intake leads to what medical condition?

How many pounds does my 2.6 kg rabbit weigh?