In a combination reaction, 1.62 g of lithium is mixed with 6.80 g of oxygen.

(b) How many moles of product are formed?

(c) After this reaction, how many grams of each reactant and product are present

Li - ?

O2 - ?

Li2O - ?

Stage in which a typical star has completely stopped fusion

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.

Which material burns faster? metal aluminum