A student obtained the following data for the rearrangement of ammonium cyanate to urea in aqueous solution at 50 C. NHANCO(aq)- (NH2)2CO(aq)

1- 44.1potassium bromideKBr138.9152

KBrKBrKBrKBr

weight percent = ------ %

molality =--------  m

mole fraction = -----

molarity = ----- M

2- solid sol_________solid,liquid,gasl,iquid or solid

_________solid,liquid,gas,liquid or solid

3-

gas phase decompositionethyl chloroformate123

ClCOOC2H5--------> C2H5Cl + CO2

4326.60×10-5-14.80×10-4-1

4-

• Attachment 1
• Attachment 2

A student obtained the following data for the rearrangement of ammonium cyanate to urea in aqueous solution at 50 C.NHANCO(aq)- (NH2)2CO(aq)[NHANCO], M0.7250.3630.1829.10x10-2minutes1444321.01x103(1) What is the half-life for the reaction starting at t=0 min?minWhat is the half-life for the reaction starting at t=144 min?minDoes the half-life increase, decrease or remain constant as the reaction proceeds?(2) Is the reaction zero, first, or second order?(3) Based on these data, what is the rate constant for the reaction?M-1min-