How much Cu-61 (half-life about 3 hours) would remain from a 2 mg sample after 6 hours?
A. 0.125 mg
B. 0.25 mg
C. 0.5 mg
O D. 1 mg

Question 5 match each term to its description. match term definition excess reactant a) reactant that can produce a lesser amount of the product limiting reactant b) reactant that can produce more of the product theoretical yield c) amount of product predicted to be produced by the given reactants

Astable atom that has a large nucleus most likely contains 1. more neutrons than protons. 2.more protons than neutrons. 3.equal numbers of protons and neutrons. 4.changing numbers of protons and neutrons.

Express your answer using two significant figures. 1.7 km^2