Which equation represents a redox reaction? 2Na+ + 2- → Na2S
2.
H+ + C2H302 → HC2H302
3.
NH3 + H+ + Cl- + NH4+ + Cl-
4.
Cu + 2Ag+ + 2NO3 – 2Ag + Cu2+ + 2NO3-

Select the correct answer. which phrase correctly describes temperature? o a. average rotational kinetic energy of the particles in an object o b. average energy of the particles in an object c. average translational kinetic energy of the particles in an object od. all energy possessed by the particles in an object

The following reaction shows sodium carbonate reacting with calcium hydroxide. na2co3 + ca(oh)2 → naoh + caco3 how many grams of naoh are produced from 20.0 grams of na2co3? (molar mass of na = 22.989 g/mol, c = 12.01 g/mol, o = 15.999 g/mol, ca = 40.078 g/mol, h = 1.008 g/mol) 12.2 grams 15.1 grams 24.4 grams 30.2 grams

What substance has a mass of 9.5g and volume of 2.1cm^3