The two south pole ends of two magnets are touching. which of the following can be concluded?

a. no work was required by an outside force.

b. the magnets are naturally attracted to each other.

c. work was required by an outside force.

d. the potential energy of the magnets is low.

Idon’t know how to solve this question

As we move from left to right across the periodic table, what is the general trend? a) atomic radii increase. b) electronegavitiy decreases. c) nuclear shielding increases. d) metallic character decreases.

Astudent states that 9.0 g of baking soda will form an unsaturated solution in 100 g of water. what do you need to know to decide whether this statement is correct? a. the temperature of the water and the molar mass of baking soda b. the percent by volume of the solution and the solubility of baking soda c. the temperature of the water and the solubility of baking soda at that temperature