A high school class is discussing whether a particular discovery in chemistry has had a positive impact on society. Which question is the most important for the students to answer?

100g of water at 90 degree celsius is added to 50g of water at 10 celsius, what is the final temperature

What will the ratio of ions be in any compound formed from a group 1a and a group 7a nonmetals?

As you move down group one of the periodic table, what happens to the atomic radii? They increase, because of the higher number of occupied energy levels. They increase, because of the stronger attraction between electrons and the nucleus.

What is solubility limit?

How do you know when you have a limiting reactant problem?

The water softener discussed here relies on precipitation softening also known as ion exchange. based o hte reactants used, what ions would remain in the softened water thaat would be consumed buy the homeowners

What would be the best technique to separate a soluble solid from a solution, like separating salt from a mixture of salt water?

What are metalloids used for

Which scientist developed the quantum mechanical model of the atom? a. Albert Einstein c. Niels Bohr b. Erwin Schrodinger d. Ernest Rutherford

How are metal atoms arranged according to metallic bonding?