Answer: Cr2NiO7 is the molecular formula for nickel II dichromate.
Answer: It will take 0.50 minutes for it to decompose to 28.2% of its initial value
Explanation:
Integrated rate law for second order kinetics is given by:

a= concentration left after time t = 
k = rate constant =
= initial concentration = 1.77
t= time taken for decomposition


Thus it will take 0.50 minutes for it to decompose to 28.2% of its initial value
D = m / V
1.025 = m / 100,000 mL
m = 1.025 x 100,000
m = 102,500 g
475/500 * 100 =95% you take what you have then divide by the total
then times 100