U-236 spontaneously decays to br-87, x and three neutrons. what is element “x”? 1. th 2. pb 3. ra 4. la 5. ba

Which of the dna typing techniques do you think you would choose if you had to analyze a dna sample? why?

Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.

Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd a) 30 joules b) 3000 joules c) 320 joules d) 3200 joules