Unit 1 DB. HS292.

Identifying hazardous substances For each hazardous substance sign in this table, describe the type of hazard substance and give an example of a material to which it might be applicable. Hazardous substance sign XX Harmful Irritant F+ Type of hazard substance Example of material

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Scientists study the impact of changing only one component of a cancer treatment in a laboratory. Which of the following describes the study? controlled experiment observational study conceptual model computational study

Name: IDENTIFYING CONTROLS & VARIABLES Krusty Krabs Breath Mints Mr. Krabs created a secret ingredient for a breath mint that he thinks will "cure" the bad breath people get from eating crabby patties at the Krusty Krab. He asked 100 customers with a history of bad breath to try his new breath mint. He had 50 customers (Group A) eat a breath mint after they finished eating a crabby patty. The other 50 (Group B) also received a breath mint after they finished the crabby patty; however, it was just a regular breath mint and did not have the secret ingredient. Both groups were told that they were getting breath mint that would cure their bad breath. Two hours after eating the crabby patties, 30 customers in Group A and 10 customers in Group B reported having better breath than they normally had after eating crabby patties. 1. Which people are in the control group? 2. What is the independent variable? nreath ma 3. What is the dependent variable? bed breath 4. What should Mr. Krabs'…

A discharge pipe releases small amounts of various alcohols from an industrial fermentation process into a lake. Local scientists would like to estimate the rate at which the alcohols are degrading in the lake. One of them, butanol (C4H9OH), is released to the lake at a rate of 20 kg/day. Butanol is measured in the lake water on several occasions at a concentration of 10-4 kg/m3; no butanol is detected in the inflowing stream. Average streamflow at the outlet of the lake is measured to be 3 x 104 m3/day. What is the magnitude of internal sinks of butanol? Assume there is not butanol exchange with the atmosphere.

B. Rates of reaction are typically measured as the change of concentration per unit time. Some typical units of concentration are: M, mM, pM, µM, nM. Some typical units of time are: years, days, hr, s, ms, ps, µs, and ns. For each reaction, suggest a reasonable unit of measure for the rate of reaction. a. The combustion of gasoline. b. The transformation of organic material into crude oil. Chemical change involved with memory in the human brain. с. d. The rusting of an iron nail. 9. Why would a scientist use nM/ps instead of M/s? - 112 -

All chemical dangers in the workplace are addressed under the:   A)  Formaldehyde Standard   B)  Hazard Communication Standard   C)  Bloodborne Pathogen Standard   D)  General Duty Rule

3) A 28 yr old woman is newly sober for the past 3 months after completing an intensive outpatient recovery program. She wants to hang out with her co-workers at happy hour in a local club. She is anxious but goes out with them and orders a soda. She feels good that she was able to go out and not have an alcoholic drink. The following week the same scenario plays out without her having an alcoholic beverage. Is she on the path to staying sober or on the road to relapse? Why?

the addition of surfactant molecules (CMC: critical micelle concentration) select one or more

If uncertain as to how to dispose a chemical, dumping it to the sink followed by copious amount of water is a safe disposal procedure   true or false

In your opinion, which program should be the first priority in the US: Medicare or Medicaid? why?

2) Which of the diet sodas have the lowest concentration of aspartame? Which standard best reflects this concentration?

What would be an appropriate shelf-life, t90, for this drug (in days) in this solution?