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Chemistry

Chemistry
DarlenaBoglioli
2021-03-23 02:36:42
The nucleus of an atom of cobalt-58 contains(1) 27 protons and 31 neutrons(2) 27 protons and 32 neutrons(3) 59 protons and 60 neutrons(4) 60 protons ...
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Chemistry
delacruzbanda
2021-03-23 02:01:27
Identify the element in Period 3 of the Periodic Table that reacts with oxygen to form an ionic compound represented by the formula X2O....
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Chemistry
rochellegaines4
2021-03-22 23:40:27
Which must be a mixture of substances? (1) solid (3) gas (2) liquid (4) solution...
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Chemistry
Wiersteiner827
2021-03-22 21:31:12
Which grouping of the three phases of bromine is listed in order from left to right for increasing distance between bromine molecules? (1) gas, liqu...
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Chemistry
nick3
2021-03-22 21:19:27
What is the oxidation number of sulfur in Na2S2O3? (1) -1 (3) +6 (2) +2 (4) +4...
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Chemistry
panda72
2021-03-22 20:32:27
Which substance can be broken down by chemical means? (1) CO (3) Ca (2) Ce (4) Cu...
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Chemistry
Ludemann264
2021-03-22 20:20:42
Which of the following is NOT an example of chemical weathering? a. natural plant acid breaking down a rock c. oxidation of metals b. acid rain de...
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Chemistry
ayupoo
2021-03-22 20:08:57
Given the balanced equation representing a reaction: 4NH3 + 5O2 ==>4NO + 6H2O What is the minimum number of moles of O2 that are needed to complete...
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Chemistry
sairacooper
2021-03-22 18:23:12
According to the wave-mechanical model of the atom, electrons in an atom (1) travel in defined circles (2) are most likely found in an excited stat...
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Chemistry
RoaRoa
2021-03-22 17:47:57
Given the incomplete equation: 4Fe + 3O2 ==> 2X Which compound is represented by X? (1) FeO (3) Fe3O2 (2) Fe2O3 (4) Fe3O4...
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Chemistry
gentryjon
2021-03-22 17:36:12
During which phase change does water release the most heat energy?...
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Chemistry
pokieecat
2021-03-22 17:24:27
The carbon atoms in graphite and the carbon atoms in diamond have different (1) atomic numbers (2) atomic masses (3) electronegativities (4) stru...
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Chemistry
truelyxparis142
2021-03-22 16:37:27
Given the balanced equation representing a reaction at 101.3 kPa and 298 K: N2(g) + 3H2(g) => 2NH3(g) + 91.8 kJ Which statement is true about this ...
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Chemistry
sophie9
2021-03-22 16:25:42
Which group on the Periodic Table of the Elements contains elements that react with oxygen to form compounds with the general formula X2O? (1) Group...
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Chemistry
roxanavelasco
2021-03-22 16:13:57
Which symbol represents a particle with a total of 10 electrons? (1) N (3) Al (2) N3+ (4) Al3+...
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Chemistry
Kerney913
2021-03-22 15:38:42
Which ion is the only negative ion produced by an Arrhenius base in water? (1) NO3– (3) OH– (2) Cl– (4) H–...
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Chemistry
ashywebster
2021-03-22 14:04:42
A student completes a titration by adding 12.0 milliliters of NaOH(aq) of unknown concentration to 16.0 milliliters of 0.15 M HCl(aq). What is the m...
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Chemistry
kjdewees7
2021-03-22 13:41:12
According to the kinetic molecular theory, which statement describes the particles in a sample of an ideal gas? (1) The force of attraction between ...
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Chemistry
rosebudnelson
2021-03-22 12:54:12
An unsaturated solution is formed when 80. grams of a salt is dissolved in 100. grams of water at 40.°C. This salt could be (1) KCl (3) NaCl (2) K...
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Chemistry
mommylittlepandabear
2021-03-22 12:42:27
A student neutralized 16.4 milliliters of HCl by adding 12.7 milliliters of 0.620 M KOH. What was the molarity of the HCl acid? (1) 0.168 M (3) 0.62...
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Chemistry
1534367
2021-03-22 11:55:27
Which is most like a scientific model? a. a thermometer b. an element c. an inch d. a map...
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Chemistry
BettyeHollack284
2021-03-22 08:59:12
Which compound is an alkyne? (1) C2H2 (3) C4H8 (2) C2H4 (4) C4H10...
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Chemistry
D16rox
2021-03-22 08:35:42
why is it important to keep accurate records during an experiment...
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Chemistry
AbishaK
2021-03-22 07:36:57
Which compound is a saturated hydrocarbon?(1) hexane (3) hexanol(2) hexene (4) hexanal...
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Chemistry
PrincessDrea11
2021-03-22 06:38:12
Matter that is composed of two or more different elements chemically combined in a fixed proportion is classified as (1) a compound (3) a mixture (...
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