What is the oxidizing agent in the redox reaction represented by the following cell notation? Mg( s) ∣ Mg 2+( aq) Cu +( aq) ∣ Cu( s)
Mg(s)
Cu+(aq)
Mg2+(aq)
Pt
Cu(s)

Which of the following is the weakest reducing agent?
Au(s)
OH2(g)
Sn(s)
ClO2-(aq)
Cl⁻(aq)

Apiece of copper has a temperature of 75.6 0c. when the metal is placed in 100.0 grams of water at 19.1 0c, the temperature rises by 5.5 0c. what is the mass of the metal?

Which statement best summarizes the importance of ernest rutherford’s gold foil experiment? it proved that all of john dalton’s postulates were true. it verified j. j. thomson’s work on the atomic structure. it showed that an electron circles a nucleus in a fixed-energy orbit. it showed that a nucleus occupies a small part of the whole atom.

What is the most common reason for matter changing its state?