It takes 25 mL of 0.20 M of hydrochloric acid (HCI) to neutralize 50 mL of sodium hydroxide (NaOH). What is the concentration of sodium
hydroxide?

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?

In a heat of an engine, if 700 j enters the system, and the piston does 400 j of work what is the final internal (thermal) energy of the system if the initial energy is 1,500 j

Suppose that a certain fortunate person has a net worth of $71.0 billion ($7.10×1010). if her stock has a good year and gains $3.20 billion (3.20×109) in value, what is her new net worth?