Can someone help me to understand this question? 2Na(s) + 2H2O (I) —> Na+(aq) + 2OH-(aq) + H2(g)

1.15 g of sodium react completely with an excess of water. The resulting solution is diluted to 0.250 dm3. Calculate the concentration of hydroxide ions in the dilute solution. Answer in mol / dm3 to two decimal places.

What determines the average kinetic energy of the particles in a gas? a. the number of collisions b. the number of particles c. the size of the particles d. the temperature

What is a main difference between a mixture and a pure substance? a mixture is only a liquid, but a pure substance can be in any state.a mixture looks the same throughout, but a pure substance does not.1 a mixture can vary in composition, but a pure substance has a set composlo a mixture can be made up of a single compound, but a pure substance car

Gasoline has a density of 0.740 g/ml. if you have 328 grams of gasoline, what is the volume in milliliters?