Calculate the % concentration (m/v) of a solution if 15 grams of NaBr is dissolved in 300mL of water.

When hydrochloric acid reacts with potassium hydroxide solution, the following reaction occurs. hcl (aq) + koh (aq) h2o (l) + kcl (aq) the reaction gives off heat energy, so it is an reaction.

Ascientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘c. what is the molar mass of this gas?

How many molecules are in 6.0 moles of methane