Considere as equações. :
i- al2o3+hcl> alcl3+h2o.
ii-so2+naoh> na2so3+h2o.
iii- bao4+hno> ba (no3)2+h2o+o2
a sequência correta dos coeficientes dos reagentes e produto necessários para o balanceamento estequiométrico dessa equação é:

i.
a) 6,3,3,2.
b)1,6,2,3
c)1,3,3,2
d)6,1,2,3
e)1,6,2,3

ii.
a)1,2,1,1
b)2,1,1,1,
c)2,1,2,2
d)2,1,2,2
e)1,2,1,1

iii

a)2,1,2,2,2
b)1,1,2,1,1
c)1,2,1,1,1
d)2,1,2,2,2
e)1,2,1,1,1

When 13.3 g koh is dissolved in 102.7 g of water in a coffee-cup calorimeter, the temperature rises from 21.4 °c to 31.53 °c. what is the enthalpy change per gram of koh (j/g) dissolved in the water? * take the density of water as 1.00 g/ml. * assume that the solution has a specific heat capacity of 4.18 j/g*k. enter to 1 decimal place. do not forget the appropriate sign /(+). canvas may auto-delete the (+) sign

What state of matter is ice a. liquid b. element c. solid d. gas

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.