True or false

in a redox reaction, any increase in the oxidation number of a reactant must be accompanied by a decrease in the oxidation state of a reactant.

true

false

What type of matter is made of only one kind of atom

For the reaction shown, find the limiting reactant for each of the following initial amounts of reactants. 4al(s)+3o2(g)→2al2o3(s) a) 1 molal, 1 mol o2 b) 4 molal, 2.6 mol o2 c) 16 molal, 13 mol o2 d) 7.4 molal, 6.5 mol o2

Which description best characterizes the motion of particles in a solid?