How you would prepare 200.0mL of a 0.25M NaOH solution.
a) 2g
b) 4g
c) 8g
d) 6g

How to convert a density of 0.791g/cm3 to lb/ft3

What are transitions between a liquid and gas called? identify which way they are transitioning

Harry lives in a city, and he has a lung condition known as asthma. on certain days, harry has to stay inside because pollutants in the air make it difficult for him to breathe. which of these pollution sources are nonpoint sources that might bother harry if he goes outside? choose the two that apply.