El fre├│n CCl2F2, tiene un calor de vaporizaci├│n de 35 cal/g, ┬┐cu├бntas moles se deben vaporizar para congelar a -10 ┬░C, 1200 gramos de agua que entra a 18 ┬░C al
refrigerador? La eficiencia del proceso es 80%.

Select the word from the list that best fits the definition the nuclear family into which a person is born or adopted.

Answer asap need to be answered 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 symbol can be used to indicate the pressure at which a chemical reaction is carried out? 25°c 2 atm pa