Es 2.
The following table relates the time and the mass of Zn during the reaction between Zn and 0.5M HNO3 :
Zn
2HNO3
H2 Zn(NO3)2
+
+
Time
0.0 s
60.0 s
120.0 s
180.0 5
Mass of Zn (g)
36.2 g
29.6 g
25.0 g
22.08
a) Calculate the reaction rate, in g/s, from time 0 to 60 s.
b) Calculate the reaction rate, in g/s, from time 120s to 180 s.
c) Explain why the rate in calculation "b" is less than that of calculation "a".

Rethink and reinvent

Cis the answer ur welcome if i get it wrong u don't have to me

Isec i will do it and them i will let you know

The reaction 2kalsi3o8 + 2(h+ + hco3-) + h2o  →  al2si2o5(oh)4 + 2k+ + 2hco3- + 4sio2 shows that feldspar kalsi3o8 is chemically altered by hydrolysis to form chalky-looking clay mineral kaolinite al2si2o5(oh)4. the chemical breakdown of potassium feldspar due to exposure to acidic water results to the mineral binding with the water molecule to become kaolinite with silica and potassium and bicarbonate ions in solution.