Chemistry

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The source of the energy produced by the sun is A) the burning of fossil fuels. B) the fission ... Started by lilldybug07	3 Replies 145 Views	Aug 27, 2018 by laurnthompson
How many elements are essential to life? A) 10 B) 30 C) 70 D) ... Started by RODY.ELKHALIL	1 Replies 72 Views	Aug 27, 2018 by bigcheese9
Iodine is an important mineral in the proper functioning of the A) brain. B) thyroid. C) ... Started by tiara099	1 Replies 65 Views	Aug 27, 2018 by nhea
Critical mass is A) the minimum amount of fissionable material that will sustain a chain ... Started by SO00	1 Replies 78 Views	Aug 27, 2018 by canderson530
Biomass does NOT produce A) asphalt. B) methane. C) ethanol. D) ... Started by tiara099	3 Replies 133 Views	Aug 27, 2018 by eliasc0401
The U.S. president who ordered the dropping of atomic bombs on the Japanese cities of Hiroshima and ... Started by james0929	1 Replies 82 Views	Aug 27, 2018 by Swizqar
Fabric softeners are cationic surfactants. Indicate whether the statement is true or ... Started by K@	1 Replies 87 Views	Aug 27, 2018 by smrerig
Naturally occurring uranium contains approximately what percentage of uranium-235, the isotope that ... Started by dbose	1 Replies 177 Views	Aug 27, 2018 by atrochim
The two main types of laundry bleaches are chlorine bleaches and oxygen bleaches. Indicate ... Started by hbsimmons88	3 Replies 285 Views	Aug 27, 2018 by stallen
The often tedious process by which a naturally occurring mixture of isotopes is separated and ... Started by ssal	1 Replies 85 Views	Aug 27, 2018 by hollysheppard095
Household bleach mixed with bleach is safe to use. Indicate whether the statement is true or ... Started by big1devin	1 Replies 170 Views	Aug 27, 2018 by robbielu01
The most energy efficient method for converting biomass into useful energy is to A) ferment ... Started by abarnes	1 Replies 82 Views	Aug 27, 2018 by patma1981
A deficiency of vitamin A may cause A) schizophrenia. B) blindness. C) cardiac arrest. D) ... Started by Brittanyd9008	3 Replies 44 Views	Aug 27, 2018 by mcabuhat
Which of the following vitamins can cause sickness if taken in too large a quantity? A) A and D ... Started by piesebel	1 Replies 33 Views	Aug 27, 2018 by Jsherida
UF6 containing uranium-235 can be separated from UF6 containing uranium-238 because A) compounds ... Started by mmm	1 Replies 56 Views	Aug 27, 2018 by kaillie
The fat soluble vitamins are A) A, B, C, K. B) A, C, D, K. C) A, D, E, K. D) B, C, D, ... Started by sdfghj	1 Replies 38 Views	Aug 27, 2018 by irishcancer18
Strontium-90 from nuclear fallout is a potential major long-term human health threat because A) ... Started by asmith134	3 Replies 78 Views	Aug 27, 2018 by Kingjoffery
Emollients act by coating the skin and softening it. Indicate whether the statement is true or ... Started by jon_i	1 Replies 38 Views	Aug 27, 2018 by frankwu0507
Iodine-131 from nuclear fallout is a potential major short-term human health threat because A) it ... Started by lracut11	1 Replies 86 Views	Aug 27, 2018 by maaaaaaaaaa
Cesium-137 is both produced in nuclear fallout and has a half-life of 30 years. Cesium-137 is ... Started by LaDunn	1 Replies 104 Views	Aug 27, 2018 by fur
Alpha hydroxy acids are carboxylic acids that have a hydroxyl group on the carbon adjacent to the ... Started by newyorker26	3 Replies 238 Views	Aug 27, 2018 by bpool94
The location of most of the hydroelectric power in the United States is in the A) northeastern ... Started by bobbie	1 Replies 79 Views	Aug 27, 2018 by fromAlphatoOmega22
Which scientist won a Nobel prize for chemistry in recognition of work involving the structure of ... Started by Metfan725	1 Replies 104 Views	Aug 27, 2018 by lindahyatt42
Which of the following isotopes produced in fission bomb explosions poses the greatest health risk ... Started by penza	1 Replies 71 Views	Aug 27, 2018 by skipfourms123
Modern toothpastes frequently contain fluorides, which help to reduce tooth decay. Indicate ... Started by Ebrown	3 Replies 51 Views	Aug 27, 2018 by tsternbergh47