Chemistry

Chemistry
dafanielfe
2021-03-22 23:47:30
Which statement is true about the charges assigned to an electron and a proton?(1) Both an electron and a proton are positive. (2) An electron is po...
ANSWER
Chemistry
homestuck69
2021-03-22 23:35:45
Which statement describes a chemical property of bromine? (1) Bromine is soluble in water. (2) Bromine has a reddish-brown color. (3) Bromine comb...
ANSWER
Chemistry
jacquelinereid
2021-03-22 20:39:30
Our solar system consists of the sun, planets, moons, asteroids, rock particles, dust, and gases that orbit the sun. From a scientific perspective, w...
ANSWER
Chemistry
msjglenn22
2021-03-22 19:29:00
Systems in nature tend to undergo changes toward (1) lower energy and lower entropy (2) lower energy and higher entropy (3) higher energy and lowe...
ANSWER
Chemistry
nkuntz456
2021-03-22 15:10:30
Element X is in group 2 and element Y is in group 17.What happens when a compound is formed between these two atoms?...
ANSWER
Chemistry
102004
2021-03-22 13:48:15
As the elements in Group 17 on the Periodic Table are considered from top to bottom, what happens to the atomic radius and the metallic character of ...
ANSWER
Chemistry
shaywow
2021-03-22 13:24:45
Which nuclide has a half-life that is less than one minute? (1) cesium-137 (3) phosphorus-32 (2) francium-220 (4) strontium-90...
ANSWER
Chemistry
pegacorn248
2021-03-22 13:01:15
A 4.86-gram sample of calcium reacted completely with oxygen to form 6.80 grams of calcium oxide. This reaction is represented by the balanced equati...
ANSWER
Chemistry
amr1
2021-03-22 12:37:45
Cobalt-60 and iodine-131 are radioactive isotopes that are used in (1) dating geologic formations (2) industrial measurements (3) medical procedur...
ANSWER
Chemistry
tigerking4203
2021-03-22 11:03:45
Which compound is an Arrhenius acid? (1) H2SO4 (3) NaOH (2) KCl (4) NH3...
ANSWER
Chemistry
Britney878
2021-03-22 10:52:00
Which statement concerning elements is true?(1) Different elements must have different numbers of isotopes. (2) Different elements must have differe...
ANSWER
Chemistry
Jujubeezer78
2021-03-22 07:08:45
When hydrochloric acid is dissolved in water the reaction produces carbon dioxide and oxygen. True or False...
ANSWER
Chemistry
laytoamcduffie
2021-03-22 05:11:15
State evidence from the balanced equation that indicates the reaction is exothermic....
ANSWER
Chemistry
odeybiiqe2
2021-03-22 03:25:30
In comparison to an atom of F-19 in the ground state, an atom of C-12 in the ground state has(1) three fewer neutrons (2) three fewer valence electr...
ANSWER
Chemistry
melniya
2021-03-22 02:26:45
Which is the electron configuration of an atom in the ground state? A) 1s22s12p2 B) 1s22s22p53s2 C) 1s22s23s1 D) ls22s22p63s1...
ANSWER
Chemistry
muffinman4097
2021-03-22 01:39:45
Samples of four Group 15 elements, antimony, arsenic, bismuth, and phosphorus, are in the gaseous phase. An atom in the ground state of which element...
ANSWER
Chemistry
mcastillo
2021-03-22 01:04:30
What is the total number of different elements present in NH4NO3? (1) 7 (3) 3 (2) 9 (4) 4...
ANSWER
Chemistry
Dgrassi21
2021-03-22 00:17:30
Based on Reference Table S, atoms of which of these elements have the strongest attraction for the electrons in a chemical bond? (1) Al (3) P (2) S...
ANSWER
Chemistry
StefanyVandever700
2021-03-22 00:05:45
At STP, a sample of which element has the highest entropy? (1) Na(s) (3) Br2(l) (2) Hg(l) (4) F2(g)...
ANSWER
Chemistry
whatissex
2021-03-21 23:54:00
Matter is classified as a (1) substance, only (2) substance or as a mixture of substances (3) homogenous mixture, only (4) homogenous mixture or ...
ANSWER
Chemistry
Kenia
2021-03-21 23:30:30
Which list consists of elements that have the most similar chemical properties? (1) Mg, Al, and Si (3) K, Al, and Ni (2) Mg, Ca, and Ba (4) K, Ca, ...
ANSWER
Chemistry
bestfriends2109
2021-03-21 22:20:00
According to Reference Table M, what is the color of the indicator methyl orange in a solution that has a pH of 2? (1) blue (3) orange (2) yellow (...
ANSWER
Chemistry
tom235
2021-03-21 21:33:00
Which substance is correctly paired with its type of bonding? (1) NaBr—nonpolar covalent(2) HCl—nonpolar covalent(3) NH3—polar covalent (4) B...
ANSWER
Chemistry
NickTrick96
2021-03-21 21:09:30
2h3co and h3co3 what is this...
ANSWER
Chemistry
tarilovesyou
2021-03-21 19:47:15
Hexane (C 6 H 14 ) and water do not form a solution. Which statementexplains this phenomenon? (1) Hexane is polar and water is nonpolar.(2) Hexane i...
ANSWER