Which of the following uses a nonrenewable energy resource to generate energy? a. nuclear power plant b. wind farm c. fireplace that burns wood d. biomass power plant

If 1.8 l of water is added to 2.5l of a 7.0 m koh solution, what is the molarity of the new solution

1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6

I'm learning about the periodic tables and what each subject's configuration is. for example, hydrogen is 1s^1, but i don't understand how you get that. can someone me understand how to figure out how to figure this out? sorry if the question makes no sense, but it would really a lot if you could me understand! you so much if you can!