Which of the following statements about the BOD test is FALSE? A There is an indirect correlation between the BOD5 value and the level of organic pollutants. B BOD test measures the oxygen consumed by microorganisms as they break down organic material The standard test for BOD is the five-day (BOD5) test carried out in the dark at 20 °C (D) BOD test is a simple and practical indicator of the total organic content that is available to organisms plus any chemicals that spontaneously react with oxygen.

Which of the following statements about the BOD test is FALSE? A There is an indirect correlation between the BOD5 value and the level of organic pollutants. B BOD test measures the oxygen consumed by microorganisms as they break down organic material The standard test for BOD is the five-day (BOD5) test carried out in the dark at 20 °C (D) BOD test is a simple and practical indicator of the total organic content that is available to organisms plus any chemicals that spontaneously react with oxygen.

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter15: Solutions

Section: Chapter Questions

Problem 2CR

See similar textbooks

Similar questions

A large population of Japanese beetles infests a plot of cropland. In response to the infesta tion, farmers treat the land with organochlorine pesticides. As a result of the treatment, the population of Japanese beetles is eradicated within the cropland, along with the popula- tions of multiple other insect species. Which of the following statements explains the most likely reason for the death of so many insect populations? Organochlorine pesticides are persistent organic pollutants that interfere with the respi- ratory system of the insect populations. Organochlorine pesticides are endocrine disruptors that interfere with the growth hor- mones of the insect populations. Organochlorine pesticides are persistent organic pollutants and interfere with the re- productive organs of the insect populations. Organochlorine pesticides are endocrine disruptors that interfere with the transmission of nerve impulses, resulting in spasms, seizures, and death of the insect populations.
Distinguished by their physical and chemical properties. Soil fertilization Soil horizon Soil profile Soil formation
SALICYLIC ACID chemical name chemical formula other common names molecular weight appearance state (solid, liquid, gas) transparency (opaque, transparent, translucent) colour reactivity data (corrosive, flammable, oxidizer, incompatible chemicals, other chemicals it reacts with) fire and explosion data toxicological data storage information preventative measures to be taken when using the chemical first aid procedures (the 2 most common) disposal method the 4 HMIS ratings (health, flammability, physical hazard and personal protective equipment) at the end, you may also add a short section in which you add a few personal comments about the chemical in question
Regarding the combustion of gasoline, 2C8H18 (l) + 25O2 (g) --> 16CO2 (g) + 18H2O (g) How could you reduce carbon dioxide emissions?
complete the stoichiometry table
1-butanol yields 1-bromobutane in the presence of concentrated sulfuric acid and an excess of sodium bromide. CH;CH,CH,CH,OH (1) → CH3 CH,CH,CH,Br (1) If 14.83 mL of 1-butanol produced 12.42 g of 1-bromobutane, the percentage yield of the product equals: (Assume the density of 1-butanol is 0.81 g/mL, the molar mass of 1-butanol is 74 g/mol, and the molar mass of 1-bromobutane is 137 g/mol.)
The environmental, biological, and toxicological outcomes of substances are strongly affected by their fundamental physical and chemical properties. Discuss the link between these underlying physical/chemical properties and the environmental or biological issues associated with the following substances: dioxin and DDT
Explain how an alcohol solution of CoCL2could be used to predict rain?
What is the purpose of the implementation of GHS? Select the correct response: To eliminate the need to translate chemical labels from one language to another. To minimize the cost of putting up multiple chemical labels per economic or geographic bloc. To generate more revenue for chemical manufacturers and distributors. To establish a central authority that will dictate the full compliance of member states of the United Nations. To have a uniform chemical hazard communication system across a global platform.
Assume the air mass temperature is 27°C and its total pressure is 0.95 atm, convert a concentration of 40 ppb of ozone O3, into Micrograms m-3
Identify general patterns of behavior of eactions?chemical r
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'…