1. Balance each of the following equations (some are already balanced)
To the left of each equation, indicate the reaction type that it represents: C = Combination; D =
Decomposition; SR = Single-replacement; DR = Double-replacement; CN - Combustion
- Mg +
O₂
Mgo
CD SR DR CN
DR CN
DSR DR CN
_Pb(NO3),+ ___K_CO, -__PbCrO + __KNO,
Al + _ C1, -_AICI,
NaOH + _NICI, - _NaCI + NI(OH),
Na, so,+ __AI(NO3), _NaNO, + Al,(80.),
C
D
SR
C D
SR (DR CN
CDSR (DR CN
Sr(OH)2 + _NaCl -
SrCl, +
NaOH
C
D
SR DR
CN
HCI + - Fe,0,- _-FeCl + _-H,0
CH,,0+ __0,- __CO2 + ___ 4,0
C
D SR
DR
CN

Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.

How many electrons does silver have to give up in order to achieve a sido noble gas electron configuration

Two nitro no2 groups are chemically bonded to a patch of surface. they can't move to another location on the surface, but they can rotate (see sketch at right). it turns out that the amount of rotational kinetic energy each no2 group can have is required to be a multiple of ε, where =ε×1.010−24 j. in other words, each no2 group could have ε of rotational kinetic energy, or 2ε, or 3ε, and so forth — but it cannot have just any old amount of rotational kinetic energy. suppose the total rotational kinetic energy in this system is initially known to be 32ε. then, some heat is removed from the system, and the total rotational kinetic energy falls to 18ε. calculate the change in entropy. round your answer to 3 significant digits, and be sure it has the correct unit symbol.