Chemistry

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The saltiness of the oceans is A) decreasing slowly. B) increasing slowly. C) increasing ... Started by kfurse	3 Replies 125 Views	Aug 27, 2018 by Melissahxx
Alkaloids, like morphine, caffeine, nicotine and cocaine, are heterocyclic A) amines. B) amides. ... Started by D2AR0N	1 Replies 128 Views	Aug 27, 2018 by Anton
What percentage of water on the earth is seawater, and hence, unfit for drinking? A) 2 B) 25 C) ... Started by karlynnae	1 Replies 37 Views	Aug 27, 2018 by tsternbergh47
What percentage of water on the earth is fresh water? A) 2 B) 25 C) 45 D) ... Started by Redwolflake15	1 Replies 75 Views	Aug 27, 2018 by Pamela.irrgang@yahoo.com
A compound that has the general formula CnH2n will be an alkyne. Indicate whether the statement ... Started by fnuegbu	3 Replies 119 Views	Aug 27, 2018 by babybsemail
Contaminated water supplies and lack of adequate sanitation kill approximately ________ people ... Started by bobypop	1 Replies 82 Views	Aug 27, 2018 by Liamb2179
Rivers constitute ________ percent of the surface water and other freshwater. A) 3.5 B) 0.49 C) ... Started by itsmyluck	1 Replies 86 Views	Aug 27, 2018 by macagnavarro
More than half of the ethylene produced in the United States every year is used for the manufacture ... Started by bobbie	1 Replies 98 Views	Aug 27, 2018 by rekilledagain
The reaction between hydrogen and the double bonds of alkenes is an example of an addition reaction. ... Started by Kikoku	3 Replies 158 Views	Aug 27, 2018 by zenzy
Rainwater is A) slightly acidic because it reacts with dissolved CO2 gas. B) slightly basic ... Started by gbarreiro	1 Replies 99 Views	Aug 27, 2018 by frankwu0507
Benzene has a carboxyl group attached to the ring. Indicate whether the statement is true or ... Started by sabina	1 Replies 115 Views	Aug 27, 2018 by Ptupou85
Soft water contains relatively large concentrations of A) iron ions. B) magnesium ions. C) ... Started by ts19998	1 Replies 272 Views	Aug 27, 2018 by vish98
Which part of the water supply is most isolated from the purifying capacity of the water cycle? ... Started by RODY.ELKHALIL	3 Replies 104 Views	Aug 27, 2018 by JaynaD87
Diethyl ether is highly flammable. Indicate whether the statement is true or ... Started by DelorasTo	1 Replies 105 Views	Aug 27, 2018 by mbcrismon
Which of these common human activities contribute to BOD? A) dumping detergents in a lake or pond ... Started by viki	1 Replies 124 Views	Aug 27, 2018 by gabrielle_lawrence
Super bugs are A) insects that can fly for a long time. B) organisms that are resistant to ... Started by cartlidgeashley	1 Replies 42 Views	Aug 27, 2018 by aliotak
Algae bloom can be stimulated on a lake or pond by A) runoff of fertilizers from crops and lawns. ... Started by fox	3 Replies 143 Views	Aug 27, 2018 by xoxo123
Biochemical oxygen demand (BOD) is a measure of the amount of A) dissolved oxygen in a water ... Started by ghost!	1 Replies 192 Views	Aug 27, 2018 by Jmfn03
Aerobic decomposition of organic matter requires A) oxygen. B) nitrogen. C) magnesium. D) ... Started by futuristic	1 Replies 424 Views	Aug 27, 2018 by xthemafja
Anaerobic degradation of organic material in water systems occurs in the absence of A) dissolved ... Started by rosent76	1 Replies 125 Views	Aug 27, 2018 by katkat_flores
As the amount of organic material in a water system increases, the BOD A) decreases. B) remains ... Started by cherise1989	3 Replies 91 Views	Aug 27, 2018 by aloop
In cells, protein synthesis occurs on the A) nucleus. B) mitochondria. C) ribosomes. D) ... Started by Diane	1 Replies 159 Views	Aug 27, 2018 by ong527
Which substance is likely to be produced when the dissolved oxygen in a lake is depleted? A) ... Started by jeatrice	1 Replies 102 Views	Aug 27, 2018 by zenzy
Alkaloids, such as caffeine and cocaine, are basic compounds. Indicate whether the statement is ... Started by jman1234	1 Replies 95 Views	Aug 27, 2018 by joneynes
Which fertilizer is also an explosive? A) NBr3 B) NH4NO3 C) NaI D) ... Started by rlane42	3 Replies 104 Views	Aug 27, 2018 by jamesnevil303