Chemistry

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Calculate the mole fraction of phosphoric acid (H3PO4 ) in a 29.1 (by mass) aqueous solution. A) ... Started by melly21297	1 Replies 255 Views	Aug 27, 2018 by scikid
The dentation of a ligand is defined by ________. A) how many dents or deceptions there are in ... Started by Shelles	3 Replies 152 Views	Aug 27, 2018 by ebe
What is the term for the temperature at which a substance changes from a solid to a liquid? A) ... Started by azncindy619	1 Replies 54 Views	Aug 27, 2018 by medine
The simplest alkane is A. C2H4. B. C2H6. C. CH3. D. CH4. ... Started by Kthamas	1 Replies 84 Views	Aug 27, 2018 by emily12345
In what type of radioactive decay does the atomic number of the product decrease by one? A) ... Started by wrbasek0	1 Replies 250 Views	Aug 27, 2018 by isabelt_18
How many milliliters of a 9.0 M H2SO4 solution are needed to make 0.35 L of a 3.5 M solution? A) ... Started by acc299	3 Replies 1,329 Views	Aug 27, 2018 by snackralk
What is the metal ion in the porphyrin of heme? A) iron B) calcium C) molybdenum D) magnesium ... Started by mynx	1 Replies 228 Views	Aug 27, 2018 by cloudre37
Calculate the mole fraction of HCl in a 7.20 (by mass) aqueous solution. A) 0.0369 B) 0.0383 C) ... Started by notis	1 Replies 209 Views	Aug 27, 2018 by lou
How many mL of a 0.175 M FeCl3 solution are needed to make 450. mL of a solution that is 0.300 M in ... Started by jrubin	1 Replies 127 Views	Aug 27, 2018 by anoriega3
What is the minimum number of straight, continuous lines that are necessary to connect the following ... Started by 2125004343	3 Replies 92 Views	Aug 27, 2018 by kingdude89
The half-life of cobalt-60 is 5.20 yr. How many milligrams of a 2.000-mg sample remain after 9.50 ... Started by james0929	1 Replies 130 Views	Aug 27, 2018 by bob
Strontium-90 is a byproduct in nuclear reactors fueled by the radioisotope uranium-235. The ... Started by theo	1 Replies 54 Views	Aug 27, 2018 by steff9894
What is the pressure (in mm Hg) of the gas inside the above apparatus if the outside pressure, Patm, ... Started by Alainaaa8	1 Replies 67 Views	Aug 27, 2018 by zhanghao
How much does Avogadro's number of sulfur atoms weigh? A. 16 g B. 32 g C. 16 amu D. 6.02 ... Started by aabwk4	3 Replies 109 Views	Aug 27, 2018 by orangecrush
Calculate the molality of a 35.0 (by mass) aqueous solution of nitric acid. A) 6.64 B) 538 C) ... Started by 123654777	1 Replies 279 Views	Aug 27, 2018 by zogaridan
Calculate the mole fraction of nitric acid of a 18.6 (by mass) aqueous solution of nitric acid. ... Started by Haya94	1 Replies 331 Views	Aug 27, 2018 by bimper21
What is the pressure in a gas container that is connected to an open-end U-tube manometer if the ... Started by imowrer	1 Replies 582 Views	Aug 27, 2018 by ryrychapman11
The correct name for Cu(NH3)4(H2O)22+ is ________. A) diwaterquatraamminecopper (II) B) ... Started by bio_gurl	3 Replies 89 Views	Aug 27, 2018 by wilsonbho
A solution contains 51 ppm of benzene. The density of the solution is 1.00 g/mL. This means that ... Started by BrownTown3	1 Replies 139 Views	Aug 27, 2018 by heinisk01
What are the sources of ordinary table salt? A) mining rock salt B) dissolving salt beds C) ... Started by geodog55	1 Replies 250 Views	Aug 27, 2018 by okolip
Which fourth period representative element has the highest atomic number? A) Ca B) Kr C) Pb D) ... Started by fox	1 Replies 102 Views	Aug 27, 2018 by reelove4eva
A rock contains 0.153 mg of lead-206 for each milligram of uranium-238. The half-life for the decay ... Started by itsmyluck	3 Replies 161 Views	Aug 27, 2018 by TheDev123
How many molecules of water are in 9 g of H2O? A. 18 1023 B. 9 1023 C. 6 1023 D. 3 ... Started by Marty	1 Replies 252 Views	Aug 27, 2018 by djofnc
Which element was rare and valuable until 1886 when an inexpensive way of producing the metal from ... Started by viki	1 Replies 99 Views	Aug 27, 2018 by ecabral0
When the test tube with hot liquid paradichlorobenzene is placed into the beaker of water, what is ... Started by frankwu	1 Replies 77 Views	Aug 27, 2018 by smrerig