It takes 72 mL of 0.49 M Al(OH)3 solution to completely neutralize 129 mL of a carbonic acid solution. What is the concentration of the H2CO3 solution?

What is the temperature of one mole of helium gas at stp?

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

Which of the following units is not an official si unit? mole liter kilogram ampere