How many milliliters of sodium metal, with a density of 0.97 g/ml, would be needed to produce 12.8 grams of hydrogen gas in the single replacement reaction below? show all steps of your calculation as well as the final answer.

unbalanced equation: na + h2o -> naoh + h2

In pqr m< p=60 m< q= 30 and m

Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.

What type of organic molecule comprises the majority of a potato?