Chemistry

Chemistry
ssr1
2021-03-23 12:24:12
Convert 26.4 mi to km...
ANSWER
Chemistry
hcnawllin
2021-03-23 12:12:27
What chemical equation shows that no atoms are lost during a chemical reaction? Answer Choices- A- 8Fe+[latex] S_{8} [/latex]=FeS B-8Fe+8[lat...
ANSWER
Chemistry
seriouslyman
2021-03-23 11:48:57
Which equation represents a change that results in an increase in disorder?(1 ) I2(s)=>I2(g) (2) CO2(g) =>CO2(s)(3) 2Na(s) + Cl2(g) =>2NaCl(s) (4) ...
ANSWER
Chemistry
ShayneBulfer
2021-03-23 11:13:42
Which of the following elements has the highest electronegativity? (1) H (3) Al (2) K (4) Ca...
ANSWER
Chemistry
Chloeadams
2021-03-23 10:14:57
Ocean water is sometimes referred to as saline water as it contains significant concentrations of dissolved salts. true or false...
ANSWER
Chemistry
lubenson
2021-03-23 09:51:27
If a 38g sample of water releases 621J of heat energy and cools to 4 0C. What was the initial temperature of the water?...
ANSWER
Chemistry
Andybj10Drea
2021-03-23 08:29:12
What are two properties of most nonmetals?(1) high ionization energy and poor electrical conductivity(2) high ionization energy and good electrical c...
ANSWER
Chemistry
LateshaHinely479
2021-03-23 07:42:12
Explain, in terms of activity, why HCl(aq) reacts with Zn(s), but HCl(aq) does not react with Cu(s)....
ANSWER
Chemistry
nikajack
2021-03-23 06:08:12
Which type of bond is found between atoms of solid cobalt? (1) nonpolar covalent (3) metallic (2) polar covalent (4) ionic...
ANSWER
Chemistry
kritz
2021-03-23 05:21:12
The sum of the atomic masses of the atoms in one molecule of C3H6Br2 is called the (1) formula mass (2) isotopic mass (3) percent abundance (4) ...
ANSWER
Chemistry
pattyjoseph
2021-03-23 02:48:27
A student calculates the density of an unknown solid. The mass is 10.04 grams, and the volume is 8.21 cubic centimeters. How many significant figures...
ANSWER
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 ...
ANSWER
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....
ANSWER
Chemistry
rochellegaines4
2021-03-22 23:40:27
Which must be a mixture of substances? (1) solid (3) gas (2) liquid (4) solution...
ANSWER
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...
ANSWER
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...
ANSWER
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...
ANSWER
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...
ANSWER
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...
ANSWER
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...
ANSWER
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...
ANSWER
Chemistry
gentryjon
2021-03-22 17:36:12
During which phase change does water release the most heat energy?...
ANSWER
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...
ANSWER
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 ...
ANSWER
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...
ANSWER